Source: https://patents.google.com/patent/TWI423418B/en
Timestamp: 2020-02-19 10:54:45
Document Index: 57792263

Matched Legal Cases: ['arts 5', 'arts 5', 'arts 5', 'arts 5', 'arts 5', 'Application No. 2008', 'arts\n6', 'arts\n104', 'arts\n309', 'art\n6']

TWI423418B - Semiconductor apparatus and manufacturing method thereof, printed circuit board and electronic apparatus - Google Patents
Semiconductor apparatus and manufacturing method thereof, printed circuit board and electronic apparatus Download PDF
TWI423418B
TWI423418B TW98110122A TW98110122A TWI423418B TW I423418 B TWI423418 B TW I423418B TW 98110122 A TW98110122 A TW 98110122A TW 98110122 A TW98110122 A TW 98110122A TW I423418 B TWI423418 B TW I423418B
TW98110122A
TW201003889A (en
Shizuaki Masuda
2008-03-28 Priority to JP2008087138 priority Critical
2009-03-27 Application filed by Nec Corp, Nec Access Technica Ltd filed Critical Nec Corp
2010-01-16 Publication of TW201003889A publication Critical patent/TW201003889A/en
2014-01-11 Publication of TWI423418B publication Critical patent/TWI423418B/en
Semiconductor device, method of manufacturing the same, and printed circuit board and electronic device
The present invention relates to a semiconductor device, a method of manufacturing the same, and a printed circuit board and an electronic device on which the semiconductor device is mounted. In particular, a small semiconductor device fabricated by combining an arithmetic processor element with a plurality of memory elements and/or a plurality of passive components, a method of manufacturing the same, and the like.
Fig. 20 shows a printed circuit board 104 in which a semiconductor component is mounted using an associated mounting technique (SMT: Surface Mount Technology), and shows a related semiconductor device (No. 1). The structure is characterized in that a plurality of memory packages 102 (for example, DRAM packages) and a plurality of passive components 103 (capacitors, resistors, inductors, etc.) are mounted in parallel two-dimensionally around the arithmetic processing processor package 101, and are used in many electrons. device.
21 shows a cross-sectional view of the associated semiconductor device (2), characterized in that the semiconductor bare wafers 204, 205 are stacked in a pyramid shape [between bare wafers called a die attach film (Die attch film) The adhesive film is bonded, and the external terminals of the bare wafers are connected to the external terminals of the interposer 206 by Au203 wires, and the whole is structured by the resin seal 201. This is one of three-dimensional mounted semiconductor devices widely used for mobile phones, which is a semiconductor device that uses a large number of components and is a packaging technology that can reduce the mounting area of components.
Moreover, FIG. 22 is a cross-sectional view showing a semiconductor device (No. 3) described in Patent Document 1 (JP-A-2006-190834), which is characterized in that the first dimension is different. The external terminals (pads 304) of the semiconductor wafer 301 and the second semiconductor wafer 302 are opposed to each other, and are connected by bumps 303, and the interposer substrate (flexible circuit substrate 306) having the holes 309 at the center portion is positioned in the outer dimensions. The outer terminals (pads 304) on the outer periphery of the larger semiconductor wafer (301 in the figure) are connected to each other by bumps 303, and the semiconductor wafers having a small outer shape are accommodated in the holes 309 (302 of Fig. 22).
23 shows a three-dimensional mounted semiconductor device, which is Patent Document 2 (Day The cross-sectional view of the semiconductor device (4) described in the Japanese Patent Publication No. 2007-188921 is based on an interposer in which a rigid wiring substrate 402 and a flexible wiring substrate 403 are combined to form a semiconductor (large-scale product). The body circuit 401) is mounted on both sides of the portion of the rigid wiring board 402, and bends a portion of the flexible wiring board 403, and fixes the flexible board 403 to the back side of the large integrated circuit 401 of one of them (and The external terminal surface is the opposite side).
The structure of the semiconductor device (1) shown in FIG. 20 is such that a plurality of DRAM packages 102 and a plurality of passive components 103 (resistors, capacitors, inductors, etc.) are juxtaposed in two dimensions around the arithmetic processing processor package 101. In the structure to be mounted (using a so-called surface mount technology (SMT) structure), the total mounting area of the aforementioned arithmetic processing processor or a plurality of DRAMs becomes large, making it difficult to miniaturize an electronic device to which the semiconductor devices are applied. Further, when the operating clock frequency of the arithmetic processing processor or the DRAM is increased (for example, 100 MHz or more), in the structure shown in FIG. 20, the wiring distance between the arithmetic processing processor and the DRAM is long, and therefore, the problem of signal delay is It becomes significant, and the signal loss increases, and there is a problem that malfunction occurs. Further, in order to reduce the size of the semiconductor device and to shorten the wiring distance between the members, when a bare wafer is used for a plurality of members, it is impossible or very expensive to obtain a bare semiconductor wafer in the form of KGD (Known Good Die). Difficult, the assembly yield of the semiconductor device is lowered, resulting in an increase in manufacturing cost.
When the arithmetic processing processor (bare wafer) 204 and the memory (bare wafer) 205 are three-dimensionally mounted semiconductor devices using the structure of the wafer-stacked semiconductor device (No. 2) shown in FIG. 21, the structure becomes A configuration in which bare wafers are in contact with each other with a thin adhesive layer 207. For example, when the arithmetic processing processor uses a three-dimensional image processor and the memory uses DRAM, since the heat generated by the three-dimensional image processor is generally as large as about 5 W or more, the heat generated from the processor is directly transmitted to the DRAM, resulting in The DRAM operation guarantees a temperature (generally about 70 to 80 ° C or less) or more, and there is a problem that the semiconductor device cannot operate.
Further, in the semiconductor device (3) described in Patent Document 1, the external terminals (pads 304) of the semiconductor wafers (301 and 302 in the figure) having different outer dimensions are opposed to each other, and the respective external portions are provided. The terminals are connected by bumps 303 such that the intermediate substrate (flexible circuit substrate 306) having the holes 309 at the center portion and the external terminals (bumps) outside the semiconductor wafer (301 in the figure) having a large outer size are provided. 303) The semiconductor wafer (302 in the figure) having a small outer shape is connected to the hole 309 provided in the center of the interposer 306. However, many semiconductor wafers capable of achieving this configuration are limited in layout in which external terminals are designed in advance, and there is a problem that the degree of freedom in designing the semiconductor device is low. Further, since it is necessary to design a semiconductor wafer, it is necessary to have a long period of development, and there is a problem that the manufacturing cost is increased, or the memory capacity cannot be changed freely according to the customer's demand. Further, since it is difficult to mount a plurality of passive components such as resistors, capacitors, and inductors in the vicinity of a semiconductor wafer (especially a memory chip), it is difficult to combine a high-speed arithmetic processing processor with a memory such as a high-speed DRAM. The problem of device operation.
In the semiconductor device (4) described in Patent Document 2, the interposer substrate in which the rigid wiring substrate 402 and the flexible wiring substrate 403 are integrated is used, and the semiconductor is mounted on both sides of the rigid wiring substrate 402. In the element (large integrated circuit 401), a portion of the flexible wiring board 403 is bent, and the structure of the flexible substrate 403 is fixed to the back side of the large integrated circuit 401 (the side opposite to the external terminal surface). However, first, there is a problem in that the manufacturing cost of the interposer in which the rigid wiring substrate 402 and the flexible wiring substrate 403 are combined is high. Further, when the member to be mounted on the interposer has a large shape or a large number of members to be mounted, the area of the interposer increases, and the warpage of the substrate increases, which may cause a problem of mounting failure. Further, in order to improve the situation, a method of thickening the interposer has been considered. However, there is a problem that the thickness of the semiconductor device increases.
Further, in connection with the above-described technique, when an arithmetic processor element that operates at a high speed, for example, when the clock frequency exceeds several hundred MHz, is used on a circuit board or an electronic device, the operation is performed, regardless of whether or not the memory element is used. When the processor element is switched at a high speed (ON or OFF of the operation), for example, as shown in FIG. 24, the wiring from the DC power supply 505 to the member, and the via and via of the printed circuit board are provided. The parasitic inductance (L) is present, so that the DC voltage V supplied to the member is instantaneously lowered (variation; ΔV), causing a problem of malfunction.
FIG. 24 shows a variation (ΔV) of the DC voltage (V) supplied to the arithmetic processor element 504 when the arithmetic processor element 504 that is switched at a high speed by the rise time t1 is mounted on the printed circuit board 507. In Fig. 24, a decoupling capacitor that suppresses or compensates for a variation (?V) of the DC voltage V is not mounted on the printed circuit board 507. Figure 25 shows the equivalent circuit of Figure 24. If the operation processor element 504 is switched at a high speed, the wiring between the DC power supply and the arithmetic processor element 504, or the via hole of the printed circuit board 507, and the parasitic inductance L of the via hole 506 (= L1+L2+L3) +L4 tens L5+L6) causes a DC voltage V variation (ΔV) supplied to the arithmetic processor element 504. The fluctuation amount ΔV of the DC voltage is expressed by the formula (1). The sign of L is -, because the induced electromotive force is generated in such a manner as to cancel the instantaneously generated current i.
△V=-L×di/dt ......(1)
Therefore, the larger the parasitic inductance of the wirings 501, 502, 503, the via holes, the via holes 506, and the time variation rate (di/dt) of the current, the larger the voltage fluctuation amount ΔV becomes. When the clock frequency is increased, the rise time t1 is shortened, so that the voltage fluctuation amount ΔV obtained by the equation (1) becomes large. In addition, in recent years, in order to reduce power consumption, the calculation processor element 504 has been reduced in voltage (for example, 3.3 V toward 1.8 V), and the voltage variation rate (ΔV/V) is increased. A large tendency is that ΔV/V exceeds the operational specification tolerance of the arithmetic processor element (for example, generally about 5%). It is good if the switching power supply can compensate for this voltage fluctuation. However, it takes 100 ns to several tens of μs to compensate with the switching power supply. Therefore, it is impossible to follow the voltage fluctuation of the high-speed switching (hundred ps to lns).
Therefore, in order to prevent such a voltage fluctuation from causing a malfunction, as shown in FIG. 26, a so-called decoupling capacitor 607 is connected in parallel between the power line-ground (ground) line of the arithmetic processor element 604. The decoupling capacitor 607 has the following two effects: bypassing the high speed switching signal generated from the arithmetic processor element 604, shortening the path of the high speed signal, and reducing the parasitic inductance L (the result, ΔV = -L × di /dt is reduced) (Effect 1); and the voltage temporarily dropped at the time of high-speed switching is compensated by supplying electric charge (discharge) from the decoupling capacitor 607 (Effect 2). From the equation (1), in order to reduce ΔV, the inductance L (existing in the wiring, the via hole, the via hole L, etc.) existing in the path of the high-speed signal can be minimized, and in general, the L is set to be the minimum. Therefore, as shown in FIG. 26, the decoupling capacitor 607 is mounted right beside the arithmetic processor element 604 or directly under the arithmetic processor element 604 via the printed circuit board 608. As a result, the fluctuation ΔV of the DC voltage supplied to the arithmetic processor element 604 is reduced by the effect 1 and the effect 2 of the decoupling capacitor 607.
Figure 27 shows the equivalent circuit of Figure 26. Due to the effect 1 and effect 2 of the decoupling capacitor (abbreviated as DCC in Fig. 27), the variation ΔV of the DC voltage supplied to the arithmetic processor element is reduced to the dotted line in the upper right diagram of Fig. 27. However, in general, in order to suppress such a variation in the DC voltage, the number of decoupling capacitors used is large, and the mounting area is increased, which results in a large area of the printed circuit board and a problem associated with an increase in cost. Further, when the wiring distance between the decoupling capacitor and the arithmetic processing processor is long, the parasitic inductance existing in the wiring path is increased, and the instantaneous voltage drop cannot be prevented, and the problem of stable operation of the semiconductor device cannot be achieved. That is, the shorter the wiring distance between the decoupling capacitor and the arithmetic processing processor, the more stable the semiconductor device can be achieved.
The present invention has been made in view of the above problems, and an object thereof is to provide a three-dimensional mounted semiconductor device and a method of manufacturing the same, which are small semiconductor devices in which a plurality of components such as an arithmetic processor element, a plurality of memory elements, and a plurality of passive components are combined, but are still small The thin type, that is, the processor or memory used for high-speed operation can still operate, the exothermic characteristics are also excellent, the processor can be freely selected without being consumed by the processor, the assembly yield is high, and the installation reliability is high and the cost is high. low.
Further, it is an object of the invention to provide a printed circuit board and an electronic device which can achieve a smaller outer shape or a smaller volume at a lower cost by mounting such a three-dimensional mounted semiconductor device.
(1) The semiconductor device according to the first aspect of the present invention, comprising: one flexible circuit board, wherein the first external electrode is provided on the first surface, and the second and third external electrodes are provided on the second surface. At least two or more wiring layers; a plurality of memory components; at least one of a plurality of passive components including a resistor, a capacitor, and an inductor; and a support body provided with at least a plurality of memory components and at least a plurality of passive components One or more grooves; one arithmetic processing processor; wherein the flexible circuit substrate has an area larger than the support, and the plurality of memory elements and the plurality of passive components are planarly mounted on the flexible circuit The first surface of the substrate is electrically connected to the first external electrode of the first surface, and the passive component is mounted in the vicinity of the memory device, and the support surrounds the plurality of memory components and the plurality of passive components Bonding to the first surface of the flexible circuit board or electrically connecting to the first external electrode provided on the first surface, the plurality of memory elements and the The movable component is housed inside the groove of the support, and the flexible circuit board is bent along the outer circumference of the support body, and covers at least one side surface of the support body and a groove surface formed in the surface of the support body At least a part of the surface opposite to the front side of the watch, the flexible circuit board is adhered to at least a part of the surface of the support, and the opposite side of the front and back of the first external electrode of the passive component is mounted The second surface has the second external electrode of the flexible circuit board, and the arithmetic processor element is electrically connected to the second external electrode, and the external terminal surface of the arithmetic processor element is mounted with the flexibility interposed therebetween The circuit board faces the external terminal surface of the plurality of memory elements and the plurality of passive components, and the surface of the support surface opposite to the front and back sides of the surface on which the groove is formed has the third external electrode of the flexible circuit board. A solder bump is formed on the third external electrode, and when the solder bump is defined as a bottom surface, the operation processor component is mounted on the top .
According to the present invention, a plurality of memory components and a plurality of passive components are planarly mounted on one side of the flexible circuit board and electrically connected to each other on the opposite side of the front and back sides of the surface on which the majority of the memory components and the majority of the passive components are mounted. An arithmetic processor element is connected, and an external terminal surface of the processor element is mounted so as to be opposed to an external terminal surface of a plurality of memory elements and a plurality of passive components via a flexible circuit board, and the three-dimensional mounting structure is such that A small-sized semiconductor device can be realized even in a semiconductor device using a plurality of members, and since a plurality of memory elements and a plurality of passive components are planarly mounted on the same surface of the flexible circuit board, a thin semiconductor device can be realized, and Since the wiring distance between the arithmetic processor element and most of the memory elements can be shortened, even if the operating frequency of the use member is high (for example, about 100 MHz or more), signal delay or signal loss can be reduced, and stable operation can be achieved.
Moreover, according to the present invention, even when the power consumption of the arithmetic processor element is large, since the arithmetic processor element is located on the top surface of the semiconductor device, it is a structure that is easy to radiate heat, and as a result, even if the arithmetic processor element generates heat, it can still The temperature rise of the adjacent memory elements is suppressed, and the ambient temperature is easily maintained below the operation guaranteed temperature of the memory element. Moreover, according to the present invention, since a plurality of passive components (capacitors, resistors, and the like) are mounted in the vicinity of the arithmetic processor element and the memory element, the operating frequency of the member can be effectively reduced even when the operating frequency is, for example, about 100 MHz or higher. In the high-speed signal transmission, various noises, such as switching noise, can achieve stable operation of the semiconductor device. Further, according to the present invention, a plurality of memory elements and a plurality of passive components are surrounded by a support provided with a groove, and the periphery of the support is covered with a flexible circuit substrate, so that a groove is formed in the surface of the support. Since the surface side opposite to the back side of the surface (the side is a flat surface) has a structure in which the external electrodes of the semiconductor device are provided, the flatness is good, and a semiconductor device having a high mounting yield can be obtained.
(2) The semiconductor device according to the first aspect of the invention, wherein the area of the arithmetic processor element is larger than an area of the plurality of memory elements and the plurality of passive components.
In the semiconductor device according to the first aspect, the arithmetic processor element is mounted on the top surface. However, according to the present invention, the arithmetic processing processor is the core of the semiconductor device of the present invention. Since the area of the specification is defined as the core, the area is basically the same. Therefore, if the semiconductor device is designed such that the total area of the plurality of memory elements and the majority of the passive parts is smaller than the area of the arithmetic processing processor, the overall size of the semiconductor device can be suppressed to the minimum limit.
(3) In order to achieve the above object, a semiconductor device according to a second aspect of the present invention includes: One flexible circuit board has a first external electrode on the first surface, two second and third external electrodes on the second surface, and at least two or more wiring layers; and most passive components include resistors and capacitors. At least one or more of the inductors; the support body is provided with at least one or more grooves for accommodating the plurality of passive components; and one arithmetic processor element; wherein the flexible circuit board area is larger than the support body, and the plurality of The passive component is planarly mounted on the first surface of the flexible circuit board and electrically connected to the first external electrode of the first surface, and the support is adhered to the flexible body so as to surround the plurality of passive components The first surface of the circuit board is electrically connected to the first external terminal provided on the first surface, and the plurality of passive components are housed inside the groove of the support, and the flexible circuit board is bent along the support outer circumference And coating at least a part of the side surface of the support body and at least a part of the surface opposite to the front surface of the surface of the support formed with the groove surface, the flexible circuit substrate is bonded At least a part of the surface of the support body has a second external electrode of the flexible circuit board on a second surface opposite to the front surface of the first external electrode on which the plurality of passive components are mounted, and the arithmetic processor element is electrically The second external electrode is connected to the external terminal surface of the arithmetic processor element, and the plurality of passive components are opposed to each other via the portable circuit board, and a groove is formed in a surface of the support body. a third external electrode of the flexible circuit board on a surface opposite to the front surface, and a solder bump formed on the third external electrode. When the solder bump is defined as a bottom surface, the arithmetic processor component is mounted. At the top.
According to the present invention, a majority of decoupling capacitors (or also referred to as bypass capacitors) that are originally mounted on the opposite side of the computing processor component or mounted on the opposite side of the computing processor component across the printed circuit board can be incorporated In the semiconductor device, the size of the printed circuit board can be reduced. Further, in the present invention, in particular, a flexible circuit board having two or more wiring layers in the interposer is used, and the thickness of the flexible circuit board is thinner than that of the conventional rigid circuit board (thickness: about 0.8 mm to 1.0 mm). Generally, it is as thin as about 0.09 mm to 0.15 mm, and the parasitic inductance of the wiring, the via hole, the via hole, and the like existing in the substrate is also small, so that the noise of the high-frequency signal can be further reduced.
Further, since a decoupling capacitor can be disposed between the printed circuit board (main board) and the arithmetic processor element and in the vicinity of the power supply terminal and the ground terminal of the arithmetic processor element, it can be reduced compared to the conventional mounting form. The parasitic inductance existing between the small operation processor element and the decoupling capacitor can reduce the voltage fluctuation occurring when the operation processor element is switched, and obtain a semiconductor device with stable operation.
(4) The semiconductor device according to a third aspect of the present invention, comprising: one flexible circuit board, wherein the first external electrode is provided on the first surface, and the second and third external electrodes are provided on the second surface And having at least two or more wiring layers; a plurality of memory elements; a support provided with at least one or more grooves for accommodating the plurality of memory elements; and one arithmetic processor element; characterized by: the flexible circuit substrate The support body is larger than the support, and the plurality of memory elements are planarly mounted on the first surface of the flexible circuit board, and are electrically connected to the first external electrode of the first surface, and the support surrounds the majority of the memory The body element is adhered to the first surface of the flexible circuit board or electrically connected to the first external electrode provided on the first surface, and the plurality of memory elements are housed inside the groove of the support body, and the The flexible circuit board is bent along the outer circumference of the support body, and covers at least one side surface of the support body and at least the surface opposite to the front surface of the surface on which the groove is formed. And the flexible circuit board is bonded to at least a part of the surface of the support, and the second surface on the opposite side of the front and back sides of the first external electrode on which the plurality of memory elements are mounted has the flexible circuit board An external electrode, wherein the arithmetic processor element is electrically connected to the second external electrode, and an external terminal surface of the arithmetic processor element is mounted to sandwich an external circuit surface of the plurality of memory elements with the flexible circuit board interposed therebetween The third external electrode of the flexible circuit board is provided on the surface opposite to the front surface of the surface on which the groove is formed, and the solder bump is formed on the third external electrode. When the solder bump is defined as a bottom surface, the arithmetic processor element is mounted on the top surface.
This configuration is similar to the semiconductor device of the first aspect described above, but differs in that many passive components are not mounted inside the semiconductor device. For example, when the semiconductor device is used in a mobile device, the operation processor element and the majority of the memory elements operate at a frequency of about 100 MHz or less, the semiconductor device can operate even when there is no passive component inside the semiconductor device. The composition of the third viewpoint. If most of the passive components are not mounted inside the semiconductor device, this component can have the advantage of miniaturizing the semiconductor device. Further, since the passive component may be mounted around the semiconductor device on the motherboard after the user side relationship, the third aspect is preferable in this case.
(5) The semiconductor device according to the first to third aspects of the invention, wherein the arithmetic processor element includes at least one of a heat sink and a heat sink.
According to the present invention, the semiconductor device can be made to have a higher cooling effect, and the temperature rise of the semiconductor device can be suppressed, and the semiconductor device having stable operation can be realized.
(6) The semiconductor device according to the first to third aspects of the present invention, wherein the arithmetic processor element and the plurality of memory elements or the arithmetic processor element are BGA (Ball Grid, Ball Grid) Array) type package.
According to the present invention, since a plurality of memory elements, one arithmetic processor element, or one arithmetic processor element are not formed of a bare wafer, and are formed by a quality-guaranteed BGA type package, high assembly yield can be obtained. Semiconductor device. In addition, in the quality-assured package, in addition to the BGA type, there are TSOP (Thin Small Outline Package), SOP (Small Outline Package), GFP (square flat package, Quad Flat). Packages of various types, such as Package) and TCP (Tape Carrier Package) type, but the BGA type package is particularly small, so that the semiconductor device can be further miniaturized. In addition, BGA type packages include, for example, μ (micro)-BGA, FBGA (Fine pitch BGA), wafer level CSP, etc., including other BGA type packages, external terminal fingers have solder balls (or solder bumps). Package.
(7) The semiconductor device according to the first to third aspects of the invention, wherein the plurality of memory devices are DRAM (Dynamic Random Access Memory, Dynamic Random) Access Memory), and the aforementioned operational processor component is an image processor.
According to the present invention, the memory component uses an image processor using a plurality of DRAMs and arithmetic processor components, and can process large-capacity information at a high speed, thereby achieving a small image processing module capable of displaying high-definition images or three-dimensional motion images on a screen. .
(8) The semiconductor device according to the first to third aspects of the present invention (the invention of (3), wherein at least one of the plurality of memory elements is packaged in a multi-chip package or stacked on each other The construction of a layer on a package on package.
According to the present invention, at least one of the memory elements is packaged in a multi-chip package or a package on package structure stacked on each other, so that more memory elements can be mounted in the same area, and a semiconductor device can be realized. The capacity of the memory is increased.
(9) The semiconductor device according to the first to third aspects of the present invention, wherein the support is made of a metal material and is electrically connected to the ground of the flexible circuit board.
According to the present invention, the support is made of a metal material, and the support is connected to the ground of the flexible circuit substrate. Therefore, even if the support is made of a metal material, the potential of the support is not unstable, and the semiconductor can be made Since the ground of the device is integrally reinforced, it is possible to achieve a grounding in which the potential does not fluctuate or the potential fluctuation is small, and the stable operation of the semiconductor device can be achieved.
(10) The semiconductor device according to the first to third aspects of the present invention, wherein at least a part of the support is made of any of a material such as a 42 alloy, a Ni-containing alloy such as Kovar, a ceramic, or Si.
According to the present invention, since at least a part of the support is composed of any of alloys including Al alloy, ceramics, and Si such as 42 alloy, Kovar, etc., the linear expansion ratio of the materials is as small as about 3 ppm to 5 ppm, so that it can be prevented from being disposed on the support. The flexible circuit board on the groove is drooped or uneven, and the mounting failure of the arithmetic processor element on the flexible circuit board mounted on the groove can be prevented. As a result, a semiconductor device having a high assembly yield can be achieved.
(11) The semiconductor device according to the first to third aspects of the present invention, wherein the support body is provided with at least one or more through holes for accommodating the plurality of memory elements and the plurality of passive components. At least one or more sheets are laminated on one sheet to produce.
According to the present invention, since at least one or more plates provided with at least one or more through holes for accommodating a plurality of memory elements and a plurality of passive components are laminated on one plate, a support having a groove is formed. The sheet material can be manufactured at low cost by etching or mold forming a groove. Further, since a plurality of materials can be combined to form a support, it is possible to easily achieve a low linear expansion ratio, a light weight, a low cost, and the like which are required for the support, compared to the case where the support is produced from one type of material.
(12) The semiconductor device according to the invention of the present invention, wherein the portion of the support having at least a through-hole is formed of a alloy containing Ni such as 42 alloy or Kovar.
According to the present invention, a portion of the plate provided with the through hole adhered or connected to the flexible circuit substrate is made of a alloy containing Ni such as 42 alloy or Kovar, and the linear expansion ratio of the materials is as small as about 3 ppm. Since it is 5 ppm, it is possible to prevent the deflection or unevenness of the flexible circuit board disposed on the groove of the support, and it is possible to prevent the mounting failure of the arithmetic processor element mounted on the flexible circuit board on the groove. As a result, a semiconductor device having a high assembly yield can be realized. Further, since at least the portion of the plate provided with the through hole that is adhered or connected to the flexible circuit board is a alloy containing Ni such as 42 alloy or Kovar, the ground can be connected to the ground of the flexible circuit board. Grounding enhancement. As a result, it is possible to achieve a grounding in which the ground potential does not fluctuate or the potential fluctuation is small, and the stable operation of the semiconductor device can be achieved.
(13) The semiconductor device according to the invention of the present invention, wherein at least one of the materials constituting the support is aluminum, aluminum alloy, titanium, titanium alloy, ceramic, and Producer of any material in Si.
According to the present invention, at least one of the materials constituting the support is made of any one of aluminum, aluminum alloy, titanium, titanium alloy, ceramic, and Si, and the material has a small specific gravity, so that the support can be made lighter. When the weight of the support is increased, when the semiconductor device is mounted on the printed circuit board twice, the compression amount of the solder ball of the external terminal is increased due to the weight of the semiconductor device, and the adjacent solder ball is easily short-circuited, resulting in mounting. The problem of a decrease in yield is achieved, but by this configuration, it is possible to improve the short-circuit defect and achieve a semiconductor device having a high assembly yield.
(14) The semiconductor device according to the invention of the present invention, wherein the laminated material constituting the support is bonded to at least a portion of a conductive material or an insulating material. Or connected, or at least partially welded to each other.
According to the present invention, at least a part of the plate and the flat plate which are provided with the through holes constituting the support are bonded or connected to each other via a conductive or insulating material, or at least a part of them are welded to each other, and therefore, the bend is flexible. In the step of bonding the circuit substrate to the periphery of the support, a support having a stable shape can be obtained (the step of bonding the flexible circuit substrate, the support is not broken down), and as a result, a semiconductor having a high assembly yield can be achieved. Device.
(15) The semiconductor device according to the invention of the present invention, wherein the surface of one of the laminated materials constituting the support is formed with a protrusion, and the material is formed with each other The other material that overlaps is formed with through holes or grooves that are included in the protrusions, and the laminated materials are connected to each other by the protrusions and the through holes or grooves.
According to the present invention, the surface of one of the laminated materials constituting the support body is formed with protrusions, and the other material overlapping the materials is formed with through holes or grooves into which the protrusions are formed, and the laminated material is formed. Since the protrusions are connected to the through hole or the groove portion, the support having a stable shape can be obtained in the same manner as (14), and the support can be obtained without using a bonding material or a welding process, so that it can be compared (14). The semiconductor device manufactures the support at a lower cost.
(16) The semiconductor device according to the first to third aspects of the present invention, in the periphery of the groove of the support, around the through hole in the plate having the through hole formed in the support, and a configuration thereof In one of the plates of the support, at least one of the above is provided with a plurality of through holes.
According to the present invention, at least one of the above is provided with a plurality of through holes in the periphery of the groove of the support or in the periphery of the through hole in the plate in which the through hole is formed or in the support plate. Thereby, the substantial volume of the material constituting the support can be reduced, and therefore, the weight of the support can be reduced. As a result, when the semiconductor device is mounted on the printed circuit board twice, it is possible to suppress an increase in the amount of compression of the solder balls of the external terminals due to the weight of the semiconductor device, and it is possible to improve the problem of short-circuit defects between adjacent solder balls, and it is possible to achieve High assembly yield semiconductor devices.
(17) The semiconductor device according to the first to third aspects of the present invention, wherein the memory element and the support are in contact with each other via a heat conductive material.
According to the present invention, even if the power consumption of the memory element is increased, the heat generated by the memory element is dissipated from the support via the heat conductive material (the support acts as a heat sink of the memory element), and therefore, A stable operation of the semiconductor device can be achieved.
(18) The semiconductor device according to the first to third aspects of the present invention, wherein the thermoplastic resin film is adhered to one of the first surfaces of the flexible circuit board or before the hardening treatment A thermosetting adhesive resin film for bonding to the surface of the support.
According to the present invention, the thermoplastic adhesive film or the thermosetting adhesive resin film before the curing treatment is attached to one surface of the first surface of the flexible circuit board and adhered to the surface area of the support. A flexible semiconductor substrate is bent while being heated to easily adhere to the surface of the support, thereby achieving a high assembly yield of the semiconductor device. Further, by using a material in the form of a film as a bonding material, the thickness of the adhesive layer can be made constant, and the unevenness of the surface of the flexible circuit substrate adhered to the surface of the support can be reduced, and the flatness can be excellent. As a result of the semiconductor device, when the semiconductor device is mounted twice on the printed substrate, a high mounting assembly yield can be obtained.
Moreover, by using a thermoplastic adhesive resin film as an adhesive layer, when the flexible circuit board is heated, the elastic modulus of the materials is remarkably reduced (about several MPa to several tens of MPa), and it becomes soft, so even Since the thickness of the flexible circuit substrate is increased by the thickness of the adhesive layer, the flexible circuit substrate can be easily bent, and the support can be easily adhered. Further, by using a thermosetting adhesive resin film before thermosetting (so-called B-stage state) as an adhesive layer, the material has a small modulus of elasticity (generally 100 MPa or less) similarly to the thermoplastic resin, so that even flexibility is obtained. When the thickness of the circuit substrate is increased, the flexible circuit substrate can be easily bent, and the support can be easily bonded.
(19) The semiconductor device according to the first to third aspects of the present invention, wherein the arithmetic processor element is provided with a heat sink that covers a shape of the entire semiconductor module.
According to the present invention, the arithmetic processor element located on the topmost side of the semiconductor device is mounted with a heat sink, and the heat sink covers the entire shape of the semiconductor module, thereby expanding the surface area of the entire heat sink and achieving excellent heat dissipation performance. Semiconductor device.
(20) The semiconductor device according to the first to third aspects of the present invention, wherein, in the flexible circuit board, the number of wiring layers in the bent region along the support is less bendable The number of wiring layers in other areas is small.
In general, when the number of wiring layers is increased in the flexible circuit board, the volume of the wiring material (generally a metal material) is increased. Therefore, the step of bending the flexible circuit board to adhere to the surface of the support is performed. It becomes difficult (when the number of wiring layers of the flexible circuit board increases, and the bending force of the flexible circuit substrate to return to the original shape becomes larger when bent, the bonding and fixing to the surface of the support become difficult).
According to the present invention, in the flexible circuit board, the number of wiring layers in the bent region along the support is smaller than the number of wiring layers in the other regions which are not bent, and therefore, the flexible circuit substrate is a multilayer wiring substrate. In this case, it is still easier to bend, and a semiconductor device with a high assembly yield can be achieved.
(21) The printed circuit board of the present invention is characterized in that the semiconductor device according to any one of (1) to (20) of the first to third aspects is provided.
According to the present invention, since the printed circuit board is mounted on any of the semiconductor devices of the present invention, the surface mount type printed circuit board can be made smaller in size.
(22) In order to achieve the above object, the electronic device of the present invention is characterized in that the semiconductor device according to any one of the above (1) to (20) is provided.
(23) In order to achieve the above object, an electronic apparatus according to the present invention is characterized in that the printed circuit board of the above (21) is mounted.
According to the invention of the above (22) (23), since the electronic device of any of the semiconductor devices or the printed circuit board of the present invention is mounted, it is possible to realize an electron compared to a conventional semiconductor device or a conventional printed substrate. Equipment for smaller electronic devices.
(24) In order to achieve the above object, a method of manufacturing a semiconductor device according to a first aspect of the present invention, comprising the steps of: (a) mounting a plurality of passive components on a first surface of the flexible circuit board; (b) a plurality of memory elements are mounted on the first surface of the flexible circuit board; (c) a support having a groove for accommodating the plurality of memory elements and the plurality of passive components is mounted on the first surface of the flexible circuit board; And covering the plurality of memory elements mounted on the first surface of the flexible circuit board and the plurality of passive components; and (d) bending the flexible circuit board along the outer circumference of the support body to cover at least the foregoing One or more side surfaces of the support and at least a portion of the surface of the support opposite to the surface on the opposite side of the surface on which the groove is formed, and the flexible circuit board is bonded to at least a part of the surface of the support; a second of the flexible circuit boards formed by the first external electrode of the flexible circuit board on which the plurality of passive components are mounted and the second surface opposite to the front and back sides of the flexible circuit board And mounting an arithmetic processor element on the external electrode; (f) forming a solder on the third external electrode of the flexible circuit board to which the surface on the opposite side of the surface on which the groove is formed is formed on the surface of the support Bump. In addition, the inventions of the following manufacturing methods are used in accordance with the first to third aspects of the semiconductor device manufacturing method, and are used in the first, second, and third aspects of the semiconductor device.
According to the present invention, a three-dimensional mounted semiconductor device in which an arithmetic processor element, a plurality of memory elements, and a plurality of passive components are combined can be easily fabricated.
(25) A method of manufacturing a semiconductor device according to the first aspect of the invention, wherein the steps (a) and (b), (a) and (b) and (c) are performed And at least one of the steps of (e) and (f) is performed simultaneously.
According to the present invention, the manufacturing steps can be reduced more than the manufacturing steps of the semiconductor device of the above (24), and the manufacturing cost can be reduced. Further, since the reflow step can be reduced, the thermal history of the memory element or the passive component or the arithmetic processing processor ‧ component can be minimized, and a semiconductor device having a high assembly yield can be obtained.
(26) In order to achieve the above object, a method of manufacturing a semiconductor device according to a second aspect of the present invention, comprising the steps of: (a) mounting a plurality of passive components on a first surface of the flexible circuit board; (b) having a support for accommodating the groove of the plurality of passive components is mounted on the first surface of the flexible circuit board so as to cover the plurality of passive components mounted on the first surface of the flexible circuit board; (c) The flexible circuit board is bent along the outer circumference of the support body, and covers at least a part of the one side surface of the support body and at least a part of the surface opposite to the front surface of the surface of the support body on which the groove surface is formed. The flexible circuit board is bonded to at least a part of the surface of the support; (d) the second outer surface of the flexible circuit board on which the plurality of passive components are mounted, and the second surface opposite to the front and back sides The second external electrode formed on the flexible circuit board is mounted with an arithmetic processor element; and (e) the flexible portion adhered to the surface opposite to the front surface of the surface on which the groove is formed on the surface of the support Circuit On the first external electrode plate 3, the solder bump is formed.
According to the present invention, it is possible to easily fabricate a three-dimensional mounting type semiconductor device in which a combination of arithmetic processing elements and a plurality of passive parts are formed.
(27) A method of manufacturing a semiconductor device according to the second aspect of the invention, wherein the step (a) and (b), and the steps of (d) and (e) are performed At the same time.
According to the present invention, the manufacturing process can be reduced more than the manufacturing method of the semiconductor device of the above (26), and the manufacturing cost can be reduced. Moreover, since the number of reflows can be reduced, the heat history of the passive component or the arithmetic processor element can be minimized, and a three-dimensional mounted semiconductor device with high assembly yield can be obtained.
(28) In order to achieve the above object, a method of manufacturing a semiconductor device according to a third aspect of the present invention, comprising the steps of: (a) mounting a plurality of memory elements on a first surface of the flexible circuit board; (b) A support having a groove for accommodating the plurality of memory elements is mounted on the first surface of the flexible circuit board so as to cover the plurality of memory elements mounted on the first surface of the flexible circuit board; The flexible circuit board is bent along the outer circumference of the support body, and covers at least one side surface of the support body and a surface opposite to the front surface of the surface of the support body on which the groove surface is formed. At least a part of the flexible circuit board is bonded to at least a part of the surface of the support; (d) the first external electrode and the front and back sides of the flexible circuit board on which the plurality of memory elements are mounted The second external electrode of the flexible circuit board formed on the second surface is mounted with an arithmetic processor element; (e) the surface of the surface of the support having the groove formed on the opposite side of the surface is bonded The foregoing Circuit board of the third external electrode to form the solder bumps.
According to the present invention, a three-dimensional mounted semiconductor device in which an arithmetic processor element and a plurality of memory elements are combined can be easily fabricated.
(29) A method of manufacturing a semiconductor device according to the third aspect of the invention, wherein the method of (a) or (b), at least one of steps (d) and (e) The steps are carried out simultaneously.
According to the present invention, the manufacturing process can be reduced as compared with the method of manufacturing the semiconductor device of the above (28), and the manufacturing cost can be reduced. Moreover, since the number of reflows can be reduced, it is possible to reduce the thermal history of the arithmetic processor element to a minimum, and it is possible to obtain a three-dimensional mounted semiconductor device having a high assembly yield.
As described above, according to the present invention, even a semiconductor device in which a plurality of components such as an arithmetic processor element, a plurality of memory elements, and a plurality of passive components are combined is small and thin, and is used even in a high-speed operation processor or memory. The situation is still actionable, and most of the memory is used, so it has higher performance and excellent heat release characteristics, and is not affected by the power consumption of the processor. The processor can be freely selected to provide high assembly yield and installation reliability. The effect of high-cost, low-cost three-dimensional mounted semiconductor devices.
Moreover, by mounting the small-sized semiconductor device of the present invention on a printed circuit board, it is possible to provide a printed circuit board having a small outer shape, and the effect of reducing the outer shape of the printed circuit board is to reduce the cost of the printed circuit board.
In addition, the small semiconductor device or the printed circuit board according to the present invention can be realized by being mounted on an electronic device such as an entertainment device, a home game machine, a medical device, a personal computer, a car navigation device, a car module, or the like. The effects of miniaturization, weight reduction, and high performance of these electronic devices.
1A to 1C are cross-sectional views showing a semiconductor device according to a first embodiment of the present invention. 2 is a plan view (viewed from directly above) when a plurality of memory elements 2 and a plurality of passive components 5 are mounted in a planar manner on the first surface of the flexible circuit board 3 used in the semiconductor device of the present invention. 3 shows that after the plurality of memory elements 2 and the plurality of passive components 5 are mounted on the flexible circuit board 3, the support 4 provided with the grooves 6 for accommodating the components is adhered to the other. A plan view of the first surface 10 of the flexible circuit board 3 or a first external electrode 12 formed on the first surface 10 (viewed from directly above). Figure 4 shows a section of A-A' in Figure 3.
In the semiconductor device according to the first embodiment of the present invention shown in FIG. 1A, the first external electrode 12 is provided on the first surface 10 of the single flexible circuit board 3, and the second external electrode is provided on the second surface 11. 13 and the third external electrode 14 have at least two or more wiring layers; a plurality of memory elements 2; and a plurality of passive components 5 including at least one of a resistor, a capacitor, and an inductor; and the support 4 is provided with a plurality of memory. At least one or more grooves 6 of the element 2 and the plurality of passive components 5; and one arithmetic processor element having one heat sink 15 and a heat sink 7.
The semiconductor device according to the first embodiment of the present invention shown in Fig. 1B is a structure in which only the heat sink 7 is removed in the structure shown in Fig. 1A. If the semiconductor device can be cooled to an operable temperature only by the heat sink 15 provided in the arithmetic processor element 1, the structure without the heat sink 7 as shown in FIG. 1B may be used.
The semiconductor device according to the first embodiment of the present invention shown in Fig. 1C is a structure in which only the heat sink 15 is removed in the structure shown in Fig. 1B. Even if the arithmetic processor element does not have the heat sink 15 or the heat sink 7, as long as it can be cooled to a temperature at which the semiconductor device can be operated using an external cooling fan or a water-cooling mechanism, as shown in FIG. 1C, there is no heat sink 7 or a heat sink. The structure of 15 is fine. These can be applied to all of the following embodiments.
The flexible circuit board 3 has a wiring layer structure of at least two or more layers, so that a signal wiring/grounding (microstrip line) structure can be achieved. The number of wiring layers is determined by the manufacturing limit of the wiring width/interval, the wiring rule, and the like, and is, for example, three or four layers. On the other hand, if the number of wiring layers can be reduced as much as possible, the manufacturing process of the flexible circuit board 3 can be reduced, and it can be manufactured at low cost, which is preferable.
Most of the memory components 2 can be bare dies or DRAMs, SRAMs (Static Random Access Memory) that can be burned or functionally tested (TSOP, BGA type packages, etc.), The flash memory or the like is composed of a volatile or non-volatile memory. For example, it may be composed of only a plurality of DRAMs, or may be composed of a plurality of memories such as a DRAM, a flash memory, a DRAM, and an SRAM.
Further, the arithmetic processor element 1 and the plurality of memory elements 2 can be used in the form of a burn-in test or a functional test (TSOP, BGA, etc.) in comparison with the use of a bare wafer, so that the semiconductor device as a whole can be used. The assembly yield is high, and the equipment investment reduction, quality assurance, and reliability required for inspection are preferred. The arithmetic processor element 1 generally has a large power consumption (for example, about 5 W or more), and it is necessary to mount the heat sink 15 or the heat sink 7. Therefore, it is preferable to use a BGA type package having the heat sink 15 or the heat sink 7 in advance as compared with the subsequent mounting. Further, the memory element 2 is preferably a BGA type package which is smaller in size than the TSOP.
Further, in order to achieve high performance of the semiconductor device, it is preferable to use the arithmetic processor element 1 and the high-speed random access DDR (Double Data Rate)-DRAM, DDR2-DRAM, and DDR3-DRAM. Pulse frequency: 100MHz or more) The DRAM of the operation, and the memory capacity is as large as possible.
The passive component 5 has a function of a resistor, a capacitor, and an inductor, and may be a wafer shape or a film shape. The capacitor may be in a columnar form such as an electric field capacitor. Further, the arithmetic processor element 1 is composed of various central processing units (CPUs) such as a video processor and a sound processing processor.
In particular, the present invention exerts the advantages of the present invention that can shorten the wiring distance between the arithmetic processor element 1 and the plurality of memory elements 2, and is applied to a three-dimensional image processing module requiring high-capacity and high-speed memory or capable of performing high-definition images. It is preferable to handle electronic equipment and the like. In this case, most of the memory elements 2 are DRAMs. Further, high-speed DRAMs such as DDR, DDR2, and DDR3 are used, and the arithmetic processor element 1 is preferably an image processor.
The support 4 is made of a metal material, a ceramic material, glass, Si, a resin substrate, a laminate of a resin and a metal foil, and the like, and is preferably a material which is inexpensive and has good flatness. These materials are etched by chemicals to form the grooves 6, and if they are a metal material, a resin substrate, or a laminate of a resin and a metal foil, the grooves 6 can be formed by a mold. By using a material having good flatness and low cost, the support 4 can achieve a semiconductor device excellent in flatness (coplanarity) even when a bump 8 formed using a solder ball is mounted, and a semiconductor device having a high mounting yield can be provided twice. .
Further, the support 4 is preferably made of at least a part of a 42 alloy, a Ni-containing alloy such as Kovar, a ceramic, or Si. In particular, a part of the support which is bonded or connected to the flexible circuit board 3 is preferably made of a material of a alloy of Ni, a ceramic such as Kovar, a ceramic, or Si. Since the linear expansion ratio of the material is as small as about 3 ppm to 5 ppm, the deflection and unevenness of the flexible circuit board 3 disposed on the groove 6 of the support 4 can be prevented, and the attachment to the groove 6 can be prevented. Poor mounting of the arithmetic processor element 1 on the circuit board 3 (open circuit failure). As a result, a semiconductor device with a high assembly yield can be achieved.
Further, when a metal material is used for the support 4 or a metal material is used for a part of the support 4, since the metal material is a conductor, electrical connection to the ground of the flexible circuit board 3 is preferable. When the support 4 made of a metal material and the ground of the flexible circuit board 3 are electrically connected, the potential of the support 4 is not unstable, and the ground of the semiconductor device can be strengthened as a whole, so that the potential can be achieved. A grounding with little variation or potential variation can achieve stable operation of the semiconductor device.
As shown in FIGS. 2 and 3, the flexible circuit board 3 has a larger area than the support 4 (FIG. 3), and the plurality of memory elements 2 and the plurality of passive components 5 are on the first surface 10 of the flexible circuit board 3. The first external electrode 12 is electrically connected to the first surface 10 of the first surface 10 (FIG. 2). The first external electrode 12 is formed on the first surface 10 in FIG. 2, but the plan view is viewed from directly above. Hidden under the memory component 2 or the passive component), and the passive component 5 is mounted in the vicinity of the memory component 2, and the support 4 is bonded to the flexible body to surround the majority of the memory component 2 and the majority of the passive component 5 The first surface 10 of the circuit board 3 is electrically connected to the first external electrode 12 provided on the first surface 10, and most of the memory element 2 and the passive component 5 are housed inside the groove 6 of the support 4.
The flexible circuit board 3 is bent along the side 18 of the support 4 (in FIG. 3, the two sides of the support 4 are opposed to each other). Further, the flexible circuit board 3 covers the side surface 16 of the support 4 (two side surfaces in FIG. 3), and the surface 17 on the opposite side of the front surface of the surface of the support 4 on which the groove is formed. Adhered to the surface of the support 4.
Here, in the method of bonding the flexible circuit board 3 to the support 4, a thermosetting adhesive is applied to the surface of the support 4 in advance, and the flexible circuit board 3 is bent and temporarily bonded. A method of curing heat. However, in this method, it is difficult to make the thickness of the adhesive uniform, and there is a problem that the surface unevenness of the flexible circuit board 3 adhered to the surface of the support 4 becomes large. Further, the liquid or gel-like thermosetting adhesive protrudes from the gap between the support 4 and the flexible circuit board 3 to the outside, and the subsequent removal step is laborious, which causes a problem of an increase in manufacturing cost.
Therefore, in order to improve this problem, it is preferable to use it on the first surface of the flexible circuit board 3, and to attach the thermoplastic adhesive resin film or the heat before the hardening treatment in accordance with the portion adhered to the surface of the support 4. A flexible circuit board 3 of a curable adhesive resin film. By using such a configuration, the flexible circuit board 3 can be bent in a heated state to be easily adhered to the surface of the support 4, and the adhesion of the adhesive to the outside of the flexible circuit board 3 or the support 4 can be improved. The problem of the inconsistency in the thickness of the adhesive layer is reduced, so that the surface unevenness of the flexible circuit board 3 is also improved, and a semiconductor device having an assembly yield or high reliability for secondary mounting of the printed substrate can be achieved.
Further, as shown in FIG. 1, the second surface of the flexible circuit board 3 is provided on the surface opposite to the front and back sides of the first surface 10 on which the plurality of memory elements 2 and the first external electrodes 12 of the passive component 5 are mounted. The external electrode 13 is electrically connected to the second external electrode 13 , and the external terminal surface 19 of the arithmetic processor element 1 is attached to the external terminal of the plurality of memory elements 2 via the flexible circuit board 3 . Face 20 and most passive parts are opposite each other. Here, in the semiconductor device of the present invention, the semiconductor device design first determines the specifications of the arithmetic processor element 1, and the arithmetic processor element 1 is mostly a large member such as a FCBGA (Flip Chip BGA). In this case, it is preferable to design the semiconductor device based on the area of the arithmetic processor element 1, so that the total area of the plurality of memory elements 2 and the plurality of passive components 5 is smaller than the area of the arithmetic processor element 1, and as a result, the semiconductor device as a whole can be made. It is preferred that the outer shape is suppressed to a minimum.
Further, a surface 17 on the opposite side of the front surface of the surface on which the groove 6 is formed is formed on the surface of the support 4, and the third external electrode 14 of the flexible circuit board 3 is formed, and the solder bump 8 is formed on the third external electrode 14. This solder bump 8 becomes the external terminal 9 of the semiconductor device.
Here, when the solder bump 8 (the external terminal 9 of the semiconductor device) is defined as the bottom surface, the arithmetic processor element 1 is mounted on the top surface, and further, the heat sink mounted on the arithmetic processor element 1 becomes the top surface. . Among the semiconductor device members constituting the present invention, the component that consumes the most power is generally the arithmetic processor element 1. However, by taking the configuration in which the arithmetic processor element 1 is located at the top of the semiconductor device, the arithmetic processor element 1 can be generated. The heat is dissipated to the outside with good efficiency, and heat is not conducted as much as possible for the memory installed nearby.
Fig. 5 is a cross-sectional view showing an example of a flexible circuit board used in the semiconductor device of the present invention. In FIG. 5, the case where the number of wiring layers of the flexible circuit board 3 is four layers is taken as an example. In FIG. 5, for the first insulating layer 31 and the seventh insulating layer 37, for example, a solder resist or a prepreg is used, and the solder resist is used to withstand the temperature at the time of reflow (peak temperature, SnP, SnAgCu, SnCu, etc. without Pb solder) A material of about 250 ° C to 260 ° C). Moreover, when the flexible circuit board 3 is bent, a material which does not crack or break is used. Further, in the second insulating layer 32, the fourth insulating layer 34, and the sixth insulating layer 36, a polyimide substrate is generally used. Further, the third insulating layer 33 and the fifth insulating layer 35 are adhesives for bonding the insulating layers on both sides, and the heat-resistant temperature is also used for the temperature at the time of reflow (SnAg, SnAgCu, A material having a peak temperature of about 250 ° C to 260 ° C when there is no Pb solder such as SnCu.
Further, in the flexible circuit board 3, the portion of the flexible circuit board 3 that is bent along the support 4 is easy to bend the flexible circuit board 3 (which can be bent with a smaller external force), and the bend is reduced. When the circuit board 3 is restored, the rebound force of the original shape is restored (to make the rebound force smaller, and the adhesion to the support is easier), and it is preferable to reduce the occupation ratio of the wiring material only in the region of the bent portion (for example, It is about 50% or less). Or the same purpose, it is preferable that the number of wiring layers in the bent region is smaller than that of the other unbent regions (the result is that the occupation ratio of the wiring material is reduced), for example, the unbending region, the wiring layer is preferable. The number is 4 layers, and the number of wiring layers in only the bent region is 3 layers or the like.
Further, the connection between the wiring layers 30 of each layer is performed via the via holes or via holes 38. The flexible circuit board 3 has the first surface 10 and the second surface 11 and has a first external electrode 12 on the first surface 10 side and a second external electrode 13 and a third external electrode 14 on the second surface 11 side. In the first external electrode 12, in the case of the first embodiment, a plurality of memory elements 2 and a plurality of passive components 5 are connected. On the other hand, the second external electrode 13 is connected to the arithmetic processor element 1, and the fourth external electrode 14 is formed with a solder ball (or solder bump) 8 serving as the external terminal 9 of the semiconductor device.
Further, on the first surface 10 of the flexible circuit board 3, the adhesive layer 29, which is one of the constituent members of the semiconductor device, is formed on a portion where the surface of the support 4 is bonded to the flexible circuit board 3. The adhesive layer 29 is preferably a thermoplastic adhesive resin film or a thermosetting adhesive resin film before the hardening treatment. In FIG. 5, an example in which the number of wiring layers is four layers is shown. However, if the microstrip line can be formed as a transmission line and the wiring can be wound, the number of wiring layers may be two or three. Further, it may be five or more layers. Further, in FIG. 5, an example in which the adhesive layer 29 is formed on the first surface 10 is shown. However, the flexible circuit board 3 having no adhesive layer 29 may be used, and an adhesive layer may be formed on the surface of the support 4 in advance. . In addition, in FIG. 5, there are two places of the first external electrode 12, two places of the second external electrode 13, and two places of the third external electrode 14, but in fact, it is possible to use a plurality of external terminals of the member. .
Fig. 6 shows a simple modification of the first embodiment of the present invention. In the first embodiment of the present invention shown in FIG. 1, the heat sink 7 is mounted on the arithmetic processor element 1. However, if the heat sink 7 is not mounted, it is sufficient to cool the function only by the heat sink 15, as shown in FIG. An example is the construction without the heat sink 7.
7 to 9 are explanatory views showing an example of a bent structure of the flexible circuit board 3. In the first embodiment, the flexible circuit board 3 is bent on the two sides of the support 4, but the flexible circuit board 3 may be bent on one side of the support as shown in FIG. A structure in which the flexible circuit board 3 is bent at three sides of the support 4 or as shown in FIG. The structure of the side bend. In this case, it is preferable to select a bending method of the optimum flexible circuit board 3 after considering that the number of wiring layers is small or the bending step of the flexible circuit board 3 is made easier.
Next, a manufacturing method of the first embodiment of the present invention will be described. Fig. 10A to Fig. 10E are flowcharts showing an example of a manufacturing method according to the first embodiment of the present invention.
First, a flux or a solder paste is applied to the first external electrode 12 on the first surface 10 of the flexible circuit board 3, and a plurality of memory elements 2 are temporarily mounted on the first external electrode. In the majority of the passive parts 5, the solder is melted in the reflow step, and the members are attached to the first surface of the flexible circuit board 3 (FIG. 10A). In the manufacturing process of the flexible circuit board 3, when a plurality of passive components 5 are mounted in advance on the first surface 10 of the flexible circuit board 3, the semiconductor device can be manufactured at low cost.
Next, the support 4 having the grooves 6 for accommodating the plurality of memory elements 2 and the plurality of passive parts 5 is connected to the first outer surface of the first surface 10 of the flexible circuit board 3 by using solder or a conductive adhesive. The electrode 12 (connected to the ground in the flexible circuit board 3) (Fig. 10B). The support 4 is mounted to surround most of the passive parts 5. When the support 4 and the flexible circuit board 3 are soldered, since the reflow device is used, in order to reduce the heat history, it is preferable to mount the plurality of memory elements 2 and the majority of the passive components 5 and the support 4 simultaneously. . When bonding with a conductive adhesive, the support 4 can be adhered to the flexible circuit board 3 and then thermally cured using an oven or a hot plate or the like, or in the middle or final step of the manufacturing process of the semiconductor device thereafter. Harden the heat. Further, if a material having a short heat hardening time is used, the reflow step in the middle is thermally hardened, and it is not necessary to re-add the heat hardening treatment.
Further, the support 4 may be adhered to the surface (insulating layer) of the flexible circuit board 3 by using an insulating adhesive. The step of thermally hardening is the same as the case of using the conductive adhesive described above.
Next, the flexible circuit board 3 is bent along the outer periphery of the support body 4 so as to be adhered to the side surface 16 of the support 4 and the surface 17 on the opposite side of the front surface of the surface on which the groove is formed. (Fig. 10C).
Next, the second external electrode 13 of the second surface 11 of the flexible circuit board 3 formed on the surface opposite to the front surface of the first external electrode 12 of the flexible circuit board 3 of the plurality of passive components 5 is mounted. The flux or solder paste is applied, the processor component 1 is laminated (stacked), and the solder is connected using a reflow soldering device (Fig. 10D).
Finally, the third external electrode 14 on the flexible circuit board 3 to which the surface 17 on the opposite side of the front surface of the surface of the groove 6 is formed is formed on the surface of the support 4, and the flux is applied to the solder ball. The transfer method or a printing method in which a solder paste is directly printed on the third external electrode without applying a flux is applied, and the solder bump 8 is formed using a reflow device (FIG. 10E). Thus, the first embodiment (Fig. 1A) of the present invention is completed.
Here, it is preferable that the majority of the memory element 2 and the plurality of passive components 5 are surrounded by the support 4, and the package in the form of the periphery of the support 4 covered with the flexible circuit board 3 is laminated with the arithmetic processor element 1. (Fig. 10D), and the step of forming the solder bumps 8 on the third external electrode 14 (Fig. 10E), simultaneously performed using a reflow soldering apparatus. When the manufacturing process of the semiconductor device is as small as possible, the reliability of the semiconductor device can be improved.
By using the manufacturing method thus constituted, it is possible to easily fabricate a three-dimensional mounting type semiconductor device in which the arithmetic processor element of the present invention and a plurality of passive components are combined, and to obtain a highly reliable three-dimensional mounting type semiconductor device.
As described above, in the first embodiment, the semiconductor device in which a plurality of components such as the arithmetic processor element 1, the plurality of memory elements 2, and the plurality of passive components 5 are combined is used, and the semiconductor device is small and thin, and is used even at high speed. It can also operate when the processor or memory is used. Because it uses most of the memory, it has higher performance and excellent heat release characteristics. It can freely select the processor regardless of the power consumption of the processor, and can provide high assembly yield and installation reliability. High-cost, low-cost three-dimensional mounted semiconductor device.
Figure 11 is a cross-sectional view showing a semiconductor device according to a second embodiment of the present invention. The second embodiment of the present invention shown in Fig. 11 is similar to the structure of the first embodiment of the present invention shown in Fig. 1. However, unlike the first embodiment, a plurality of BGA type package laminates are used (so-called package on package). structure).
Fig. 11 shows a structure in which the package stack of the BGA type has a two-stage configuration, but it is not limited to the BGA type package, and may be a laminate of a TSOP type package having a lead wire at an external terminal. Further, in Fig. 11, the two groups of the package stack are used. However, three or more groups may be used if the area limitation is allowed. Further, as long as the height limit is allowed, the package may be laminated in three or more stages, and may contain unpackaged package monomers. Moreover, it may be a packaged single or a multi-chip package containing a plurality of memory bare chips. The multi-chip package refers to a form in which a plurality of bare wafers are mounted in a three-dimensional stacked manner inside a package unit, or a plurality of bare wafers are arranged and mounted in a plane. In other words, any form of component can be combined as long as the semiconductor device can achieve the necessary memory capacity. According to the present embodiment, it is possible to increase the capacity of the memory of the semiconductor device.
Figure 12 is a cross-sectional view showing a semiconductor device according to a third embodiment of the present invention. The third embodiment of the present invention shown in Fig. 12 has a structure similar to that of the first embodiment of the present invention shown in Fig. 1. However, in the first embodiment, the plate 21 and the flat plate 22 having the through holes are laminated as Support 4 is different. According to this embodiment, it is possible to manufacture the flat plate material using the etching or the mold forming groove 6 at a lower cost than the first embodiment of the present invention shown in Fig. 1 . Further, since a plurality of materials can be combined to form a support, it is easy to achieve a low linear expansion ratio, a light weight, a low cost, and the like which are required for the support, compared to the case where the support is produced from one material.
Further, in the third embodiment of the present invention, the portion of the support 4 in which at least the through-hole plate 21 is provided is preferably made of a alloy containing Ni such as 42 alloy or Kovar. Since the linear expansion ratio of the alloy material is as small as about 3 ppm to 5 ppm, the flexible circuit board 3 placed on the groove 6 of the support 4 can be prevented from sagging and unevenness, and the flexibility attached to the groove 6 can be prevented. The mounting of the arithmetic processor element 1 on the circuit board 3 is defective (open circuit failure). As a result, a semiconductor device with a high assembly yield can be achieved.
Further, in the third embodiment of the present invention, among the materials constituting the support 4, at least the flat plate 22 is preferably made of any one of aluminum, aluminum alloy, titanium, titanium alloy, ceramic, and Si. Since these materials have a small specific gravity, the support 4 can be made lighter. When the weight of the support 4 is increased, when the semiconductor device is mounted on the printed circuit board twice, the compression amount of the solder ball of the external terminal 9 is increased due to the weight of the semiconductor device, and it is easy to short-circuit with the adjacent solder ball, and there is installation. The problem of a decrease in yield is achieved, but with such a configuration, it is possible to improve the short-circuit defect and achieve a semiconductor device with a high assembly yield.
In Fig. 12, the plate 21 having the through holes and the flat plate 22 are each provided, and the layers are laminated. However, the plate 21 having the through holes and the flat plate 22 are not limited to one. It is also possible to use two or more sheets each, or a structure in which two sheets having a through hole and one sheet are laminated. In other words, if the flexible circuit board 3 disposed on the groove of the support 4 is prevented from sagging or unevenness, and the weight of the support 4 can be reduced, the support 4 can be produced in any combination.
Further, at least a part of the laminated materials constituting the support 4 are bonded or connected to each other via a conductive or insulating material, or at least a part thereof is welded to each other (for example, spot welding or the like). When the laminated materials are not fixed to each other, when the flexible circuit board 3 is bent and adhered to the periphery of the support 4, most of the laminated materials move and assembly defects are likely to occur, but by using In the present embodiment, the support 4 having a stable shape can be obtained, and as a result, a semiconductor device having a high assembly yield can be obtained.
13A to 13E are characteristic views of the support 4 used in the fourth embodiment of the present invention, and FIGS. 13A to 13D are cross-sectional views, and FIG. 13E is a plan view seen from directly above the groove 6 side.
In the fourth embodiment of the present invention, only the structure of the support is different from that of the other embodiments. In the fourth embodiment, in order to achieve the weight reduction of the support 4, the periphery of the groove 6 of the support 4 or the periphery of the through hole of the plate 21 of the support 4 provided with the through hole or the flat plate 22 constituting the support is formed. A plurality of through holes 23 are provided in at least one of the places. Since a large number of through holes 23 are provided in the material constituting the support 4, the effective volume of the material can be reduced, so that the weight of the support 4 can be reduced.
Further, when the volume of the support 4 is large, the heat capacity is also increased, and if the external heating temperature is not increased in the reflow step, it is difficult to melt the solder to form the solder bumps 8. However, if the external heating temperature is increased, there is a problem that the solder resist constituting the flexible circuit board 3 is peeled off, or the interlayer adhesive is peeled off inside the flexible circuit board 3, which is not preferable. In particular, when Sn-free Pb-free solder is used, if the heat capacity of the support 4 is large, the heat is taken away by the support 4, and if the external temperature does not rise to about 260 ° C or more, the solder cannot be sufficiently melted. The aforementioned problems will become significant. On the other hand, when the support 4 is configured as in the fourth embodiment, the heat capacity of the support 4 can be reduced. Therefore, the external heating temperature in the reflow step can be made as low as possible, and the flexible circuit board 3 can be prevented. Stripping of the solder resist or stripping of the interlayer adhesive.
Figure 14 is a cross-sectional view showing a semiconductor device according to a fifth embodiment of the present invention. The fifth embodiment of the present invention differs from the other embodiments in that the plurality of memory elements 2 and the support 4 are in contact with each other via the heat conductive material 24. The heat conductive material 24 is a conductive or insulating material, and is composed of a thermosetting material, a gel material, a rubber material, or the like. In FIG. 14, the surface opposite to the front and back sides of the external terminal surface 20 of the memory element having a large surface area among the surfaces of the memory element 2 is in contact with the support 4 via the heat conductive material 24.
By using such a configuration, even if the power consumption of the memory element 2 is increased, the heat generated by the memory element 2 can be dissipated to the support via the heat conductive material 24 (the support 4 functions as a heat sink of the memory element 2). Function), can achieve stable operation of the semiconductor device.
The material of the support 4, particularly the material in contact with the memory element 2 via the heat conductive material 24, is preferably Cu or Al which is high in thermal conductivity and can be inexpensively manufactured, or an alloy mainly composed of these elements. Further, in order to achieve weight reduction, it is preferable to use Al or an alloy containing Al as a main raw material.
Moreover, by using such a configuration, not only the cooling effect of the memory element 2 itself but also the heat transferred from the arithmetic processing processor 1 to the support 4 can be radiated to the memory element 2, so that the memory element 2 can be made. By maintaining the environment below the operation guaranteed temperature, stable operation of the semiconductor device can be achieved.
Further, as the heat conductive material 24, a gel material or a rubber material (a gel for exothermic heat, a commercially available product for heat release rubber, or the like) is preferably used. If the heat conductive material 24 is made of a conductive or insulating adhesive material and a thermosetting material, the support 4 and the memory element 2 are fixed, and the stress is caused by the difference in thermal expansion between the support 4 and the memory element 2. On the other hand, the thermal conductive material 24 is cracked, which causes a problem that the cooling effect is lowered, or the connection between the memory element 2 and the flexible circuit board 3 is caused by the aforementioned stress. Therefore, when the heat conductive material 24 is made of a gel-like material, the support 4 and the memory element 2 are not fixed, and the stress is relieved in a state of contact, and a highly reliable semiconductor device can be obtained.
15A and 15B are cross-sectional views showing a semiconductor device according to a sixth embodiment of the present invention. The sixth embodiment of the present invention differs from the other embodiments in that the heat sink 7 attached to the arithmetic processor element 1 has a shape covering the entire semiconductor module. By forming the shape of the heat sink 7, first, the entire surface area of the heat sink can be made wider, and a semiconductor device excellent in heat dissipation can be obtained. 15A and 15B are cross-sectional views, although the memory element 2 or the passive component 5 can be observed, but in reality, the structure of the four sides of the support 4 is covered with a heat sink.
Further, according to the configuration of Fig. 15A, there is an advantage in reducing the mounting height of the semiconductor device including the heat sink 7. Here, since the volume of the heat sink 7 is increased due to the configuration of FIG. 15, the material of the heat sink 7 is preferably an alloy having high thermal conductivity, light weight, or Al as a main component.
Figure 16 is a cross-sectional view showing a semiconductor device according to a seventh embodiment of the present invention. A semiconductor device according to a seventh embodiment of the present invention includes: one flexible circuit board 3, the first external electrode 12 is provided on the first surface 10, and the second and third external electrodes are provided on the second surface 11 (each 13 and 14) have at least two wiring layers; most of the passive components 5 include at least one of a resistor, a capacitor, and an inductor; and the support 4 is provided with at least one or more grooves 6 for accommodating a plurality of passive components 5. 1 arithmetic processor element 1 having a heat sink 15 or a heat sink 7.
Further, the area of the flexible circuit board 3 is larger than the area of the support 4. Most of the passive components 5 are planarly mounted on the first surface 10 of the flexible circuit board 3 and electrically connected to the first external electrode 12 of the first surface 10. The support 4 is bonded to the first surface 10 of the flexible circuit board 3 so as to surround the majority of the passive components 5, or is electrically connected to the first external terminal 12 provided on the first surface 10. Most of the passive parts 5 are housed inside the groove 6 of the support body 4. The flexible circuit board 3 is bent along the outer circumference of the support body 4, and covers at least one side surface 16 of the support body 4 and the surface of the surface of the support body 4 on the opposite side of the surface on which the groove 6 is formed. At least a portion of the surface is bonded to at least a portion of the surface of the support 4.
The second external electrode 13 of the flexible circuit board 3 is provided on the surface opposite to the front and back sides of the first external electrode 12 of the plurality of passive components 5. The arithmetic processor element 1 is connected to the second external electrode 13, and the external terminal surface 19 of the arithmetic processor element 1 is mounted so as to be opposed to the plurality of passive components 5 with the flexible circuit board 3 interposed therebetween. The surface 17 on the opposite side of the front surface of the surface on which the groove 6 is formed is formed on the surface of the support 4, and the third external electrode 14 of the flexible circuit board 3 is provided. Solder bumps 8 are formed on the third external electrode 14. When the solder bump 8 is defined as a bottom surface, the structure in which the arithmetic processor element 1 is the top surface is mounted.
The seventh embodiment is similar to the other embodiments, but the structure is different in the case where the memory element 2 is not included as the electronic component.
According to this configuration, a plurality of decoupling capacitors, which are mainly mounted on the opposite side of the arithmetic processor element 1 or sandwiched between the printed circuit board (main board) and mounted on the opposite side of the arithmetic processor element 1, can be incorporated into the semiconductor device. Among them. Therefore, the miniaturization of the printed circuit board can be achieved. Further, since the decoupling capacitor can be disposed between the printed circuit board and the arithmetic processor element 1, and the power supply terminal and the ground terminal of the processor element 1 are calculated, the presence of the decoupling capacitor can be reduced as compared with the conventional mounting form. The parasitic inductance of the wiring between the processor element 1 and the decoupling capacitor can reduce the voltage fluctuation generated when the processor element 1 is switched, and a semiconductor device with stable operation can be obtained.
Further, in the seventh embodiment, the heat sink 7 is attached. However, if the ambient temperature during operation can be cooled to below the operation guaranteed temperature of the arithmetic processor element 1, the structure having only the heat sink 15 may be employed. , that is, the structure without heat sink 7.
Next, a manufacturing method of the seventh embodiment of the present invention will be described. The explanatory diagram of this manufacturing method is similar to the manufacturing method of the first embodiment of the present invention shown in Figs. 10A to 10E, and therefore will not be described. In the case of removing a plurality of memory elements 2 in Figs. 10A to 10E, a description will be given of a manufacturing method according to a seventh embodiment of the present invention.
First, a solder paste is applied onto the first external electrode 12 of the first surface 10 of the flexible circuit board 3, and a plurality of passive components 5 are temporarily attached to the first external electrode 12, and a passive part is used to perform passive parts. 5 is soldered to the flexible circuit board 3.
Next, using the solder or the conductive adhesive, the support 4 having the grooves 6 for accommodating the plurality of passive components 5 is connected to the first external electrode 12 on the first surface 10 of the flexible circuit board 3 (and Ground connection in the flexible circuit board 3). The support 4 is mounted in such a manner as to surround most of the passive parts 5. When the solder support 4 and the flexible circuit board 3 are soldered, since the reflow soldering apparatus is used, in order to reduce the heat history, it is preferable to mount the passive component 5 and mount the support 4 at the same time. When bonding with a conductive adhesive, the support 4 can be adhered to the flexible circuit board 3, followed by heat curing using an oven or a hot plate, or a subsequent manufacturing step of the semiconductor device. Midway or final step to harden the heat. Further, if a material having a short heat hardening time is used, the step of the middle of the flow is thermally hardened, and it is not necessary to re-add the heat hardening treatment.
Moreover, the support 4 can be bonded to the surface (insulating layer) of the flexible circuit board 3 by using an insulating adhesive. The step of heat hardening is the same as the above-described use of a conductive adhesive.
Next, the flexible circuit board 3 is bent along the outer periphery of the support body 4 so as to be adhered to the side surface 16 of the support 4 and the surface 17 on the opposite side of the front surface of the surface on which the groove is formed. .
Next, the second external electrode 13 of the second surface 11 of the flexible circuit board 3 formed on the surface opposite to the front surface of the first external electrode 12 of the flexible circuit board 3 of the plurality of passive components 5 is mounted. A flux or a solder paste is applied, and the arithmetic processor element 1 is overlapped (stacked), and soldering is performed using a reflow device.
Finally, the third external electrode 14 on the flexible circuit board 3 to which the surface 17 on the opposite side of the front surface of the surface on which the groove 6 is formed is formed on the surface of the support 4 is coated with a flux and transferred by a solder ball. The printing method is applied by a printing method in which a solder paste is directly printed on the third external electrode without applying a flux, and a solder bump 8 is formed by using a reflow device, thereby completing the seventh embodiment of the present invention.
Here, it is preferable to use the reflow soldering apparatus to simultaneously perform the following steps: the majority of the passive components 5 are surrounded by the support 4, and the package around the support 4 is covered with the flexible circuit substrate 3 and stacked with the arithmetic processor element 1 a step of forming a layer; and forming a solder bump 8 on the third external electrode 14. The manufacturing steps of the semiconductor device can reduce the thermal history as much as possible, and the reliability of the semiconductor device can be further improved.
By using such a manufacturing method, it is possible to easily fabricate a three-dimensional mounting type semiconductor device in which the arithmetic processor element of the present invention and a plurality of passive components are combined, and to obtain a highly reliable three-dimensional mounted semiconductor device.
Figure 17 is a cross-sectional view showing a semiconductor device according to an eighth embodiment of the present invention. The eighth embodiment is similar to the first embodiment of the present invention shown in Fig. 1B. However, in the first embodiment, the point where the majority of the passive components are not mounted inside the semiconductor device differs in structure.
In the case of the eighth embodiment, for example, a semiconductor device is used for a portable device, and the operating device element 1 and the majority of the memory elements 2 have an operating frequency of about 100 MHz or less, and the like, even if there is no passive component inside the semiconductor device, the semiconductor device The case where it is still possible to operate alone is suitable for applications requiring a smaller semiconductor device.
Further, there is a case where the passive component is mounted around the semiconductor device on the motherboard after the user side. In this case, the configuration of the embodiment is preferable. Since the manufacturing method is substantially the same as the other embodiments described so far, it is omitted.
Further, FIG. 17 shows an example in which the arithmetic processor element 1 has the heat sink 15 as an example. However, if the semiconductor device is cooled to a temperature below the operation guarantee temperature, it is of course possible to load the heat sink 7 or the heat sink 15 . There is also no construction of the heat sink 7.
Fig. 18 is a cross-sectional view showing a printed circuit board on which the semiconductor device 26 of the present invention is mounted in the ninth embodiment of the present invention. Fig. 18 shows a printed circuit board on which an arithmetic processor element 1, a plurality of memory elements 2, and a plurality of passive parts are mounted by surface mounting technology.
The semiconductor device of the present invention uses a three-dimensional mounting. Up to this point, the mounting area of the members is the sum of the mounting areas of the members. However, according to the present invention, as shown in Fig. 18, the size of the processor element 1 can be roughly calculated. As a result, the printed circuit board 25 can be downsized and the manufacturing cost can be reduced in response to the total mounting area of the plurality of memory elements 2 and the total mounting area of the majority of the passive components 5. Further, in the conventional surface mounting, the mounting area of the printed circuit board 25 can be mounted on both sides in order to reduce the wiring area or shorten the wiring distance. However, by using the present invention, it can be mounted on one side, so that it can be reduced. The number of wiring layers of the printed circuit board 25 results in a reduction in the manufacturing cost of the printed circuit board 25.
Though the description is omitted, the electronic device of the present invention described above or the printed circuit board of the semiconductor device of the present invention according to the ninth embodiment of the present invention shown in FIG. 18 can be used to assemble an electronic device. A smaller electronic device than before, or a miniaturization of a printed circuit board or a reduction in the number of wiring layers. As a result, a low-cost electronic device can be achieved. Applicable electronic devices, for example, are ideal for entertainment devices, home game consoles, medical devices, personal computers, navigation machines, vehicle modules, etc., which are required to broadcast high-definition video three-dimensional dynamic images on the screen.
Fig. 28 is an enlarged cross-sectional view showing a bent portion of the flexible circuit board 3 of the semiconductor device according to the tenth embodiment of the present invention. In the flexible circuit board 3 of the semiconductor device of the present invention, only the region 41 in which the flexible circuit board 3 is bent along the support 16 is used, and the number of layers of the wiring 3 is smaller than that of the flexible circuit board. 3 The number of layers of wiring 3 in other areas of the bend is small. In general, when the number of layers of the wiring 3 is increased in the flexible circuit board 3, the volume of the wiring material (generally a metal material) is increased, so that it is difficult to bend the flexible circuit board 3 and adhere to the support. The step of the surface of the 16 (if the number of wiring layers of the flexible circuit board is increased, the rebound strength of the flexible circuit board to return to the original shape is larger when bent, and therefore it is difficult to adhere and fix the surface of the support).
According to the present invention, as shown in FIG. 28, the number of wiring layers 3 (three layers in FIG. 28) in the region 41 bent along the support 16 among the flexible circuit boards 3 is less than that which is not bent. Since the number of wirings in the other regions is three (four layers in FIG. 28), even if the flexible circuit board 3 is a multilayer wiring board, the semiconductor device can be easily bent and a high assembly yield can be achieved.
Although only one side is shown in Fig. 28, it is also possible to use, for example, one or two layers of the wiring 3 in the bent region 41 along the support.
Further, among the regions 41 which are bent along the support, the number of the wiring layers 3 is less than that of the other regions, and is not particularly limited. However, when the flexible circuit board 3 is bent, it is preferable to remove the most from the support body 16 The wiring layer of the outermost side 43 of the far position. When the flexible circuit board 3 is bent, the wiring layer located on the outer side 43 is easily mechanically elongated, so that it is easily broken. However, by removing the wiring located on the outer side 43, the wiring breakage can be improved. phenomenon.
Although a plurality of embodiments have been described above, other embodiments are not limited to the above embodiments as long as they do not deviate from the gist of the present invention.
Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings, but the invention is not limited to the following examples.
In order to manufacture the semiconductor device of the present invention, four BGA type DDR-DRAM packages 27 as shown in FIG. 19A are prepared (outer dimensions: about 13 mm × 13 mm × height 0.7 mm, memory capacity: 256 Mbit, external clock frequency: 166 MHz) , the number of external terminals: about 170 pins, solder ball spacing: 0.8mm); a BGA type three-dimensional image processor package as shown in Figure 19B (about 38mm × 38mm × height 2.0mm, external clock frequency: 166MHz , the number of external terminals: about 800 pins, solder ball spacing: 1.27mm); 16 1005 type chip capacitors (1.0mm × 0.5mm) (100pF ~ 100nF); four 1005 type chip resistors (33Ω: 1.0mm ×0.5 mm); one support body made of Al as shown in Fig. 19C (44 mm × 44 mm × thickness: 1.3 mm); one flexible circuit substrate having four layers of wiring layers as shown in Fig. 19D (outline) The size is about 44 mm × 91 mm × thickness 0.14 mm); about 800 SnAgCu solder balls having a diameter of about 0.8 mm are used as solder balls for the external terminals of the semiconductor device of the present invention.
Here, in the DDR-DRAM package, as shown in FIG. 19A, the DDR-DRAM bare wafer 28 is planarly arranged inside the package and mounted. Moreover, the DDR-DRAM package is used for each bare chip 28 in the DDR-DRAM package, and the data terminals (generally terminals indicated by DQ) are independently independent of the external terminals of the DDR-DRAM package (Fig. 19A, solder bumps (soldering) Ball) 8 becomes the specification of the external terminal) electrical connection. The data terminals of the two DDR-DRAM bare chips are not connected in common, and by independent (the number of external terminals is increased by their components), the data bus width is increased to achieve higher speed signal transmission. Moreover, as shown in FIG. 19D, the first of the flexible circuit board 3 On the surface 10, a thermoplastic adhesive sheet having a thickness of 25 μm was attached as a bonding layer 29 in advance to a portion corresponding to the surface of the support 4 to be bonded. The thermoplastic sheet uses a material that can be bonded at about 150 ° C or higher. Further, the support was produced by joining the Al sheets provided with the through holes and the Al flat plates by spot welding and partially joining them.
First, a cream solder (solder paste) is applied to the external electrode on the first surface of the flexible circuit board, and a chip mounter and a wafer mounter are used, and each DDR-DRAM package and The wafer capacitor and the chip resistor are temporarily mounted on the flexible circuit substrate. Thereafter, the members are soldered to the flexible circuit board using a reflow soldering device.
Next, the support is bonded to the external electrode of the first surface of the flexible circuit board (the external electrode connected to the ground) by using a conductive adhesive so as to surround the DDR-DRAM package, the chip capacitor, and the chip resistor. . The bonding between the support and the flexible circuit board is performed using a mounting and mounting machine.
Next, the sample is adsorbed and fixed on a heating pedestal heated to 180 ° C, and the flexible circuit substrate is bent on the two sides of the support by a pressing tool to adhere to the surface of the support, and the majority of the DDR-DRAM is packaged. A plurality of capacitors and resistors are surrounded by a support, and a package for bonding the flexible circuit board around the support is produced. In the package surface fabricated in this manner, the arithmetic processing processor package overlaps on the external terminal surface side of the DDR-DRAM package, and the external terminal of the semiconductor device is soldered on the opposite side of the front and back of the external terminal of the DDR-DRAM package. After the ball is temporarily loaded with the flux, it is put into a reflow furnace for soldering, and the semiconductor device shown in Fig. 19E is completed.
The dimensions of the semiconductor package thus fabricated are about 44 mm x 44 mm x height 4 mm. Moreover, even if the external dimensions are large, the assembly property is good, and when mounted on a motherboard of a personal computer (PC), an image can be activated as a normal product.
Moreover, with the present embodiment, the area of the motherboard of the personal computer can be reduced. Further, although not shown in FIG. 19E, the semiconductor device of the first embodiment is mounted on a motherboard of a personal computer, and the heat sink is adhered to the heat sink 15 with a conductive adhesive.
In order to manufacture the semiconductor device of the present invention, a plurality of protrusions 39 of Al are provided on one of the surfaces of the support as shown in FIG. 19F, and Al which is provided with the through holes 23 The sheet 21 and the flat plate 22 provided with a plurality of through holes 40 are connected to each other to form a support. Using such a support, the semiconductor device was manufactured in the same manner as in Example 1 by the same materials and manufacturing methods.
The assembly of the semiconductor package thus produced was as good as that of the first embodiment, and when mounted on a motherboard of a personal computer (PC), it was confirmed that the image can be started in the same manner as a normal product.
Further, compared with the support used in the first embodiment, the support produced by the above method can be manufactured at a lower cost, and the semiconductor device can be realized at a lower cost than the semiconductor device of the first embodiment.
The embodiments of the present invention have been described above, but the present invention is not limited to the foregoing embodiments, and various changes can be made without departing from the scope of the invention.
The invention of the present application has been described above with reference to the embodiments and examples, but the invention is not limited to the embodiments and examples described above. Various changes that can be understood by those skilled in the art can be made within the scope of the invention.
The present application claims priority from Japanese Patent Application No. 2008-087138, filed on March 28, 2008, the entire disclosure of which is incorporated herein.
1‧‧‧Operation processor components
2‧‧‧ memory components
3‧‧‧Flexible circuit board
4‧‧‧Support
5‧‧‧ Passive parts
6‧‧‧ditch
7‧‧‧ Heat sink
8‧‧‧ solder bumps (or solder balls)
9‧‧‧External terminals for semiconductor devices
10‧‧‧The first side of the flexible circuit board
11‧‧‧The second side of the flexible circuit board
12‧‧‧1st external electrode
13‧‧‧2nd external electrode
14‧‧‧3rd external electrode
15‧‧‧heatsink
16‧‧‧Side of the support
17‧‧‧ with the groove formed on the opposite side of the watch back
18‧‧‧The side of the support
19‧‧‧External terminal surface
20‧‧‧External terminal surface
21‧‧‧With a through-hole plate (one part of the support)
22‧‧‧ tablet
23‧‧‧through holes
24‧‧‧Heat conductive materials
25‧‧‧Printed circuit board
26‧‧‧Semiconductor device of the invention
27‧‧‧BGA type DDR-DRAM package
28‧‧‧ DDR-DRAM bare wafer
29‧‧‧Adhesive layer
30‧‧‧Wiring pattern
31‧‧‧1st insulation layer
32‧‧‧2nd insulation layer
33‧‧‧3rd insulation layer
34‧‧‧4th insulation layer
35‧‧‧5th insulation
36‧‧‧6th insulation
37‧‧‧7th insulation
38‧‧‧through or mesopores
39‧‧‧ Protrusion
40‧‧‧through holes or grooves connected to the projections
41‧‧‧A region where the flexible circuit substrate is bent along the support
42‧‧‧A region with a small number of wiring layers
43‧‧‧ outside
101‧‧‧Operation Processing Processor Package
102‧‧‧ memory package
103‧‧‧ Passive parts
104‧‧‧Printed circuit board
201‧‧‧ resin seal
202‧‧‧ solder bumps
203‧‧‧Au line
204‧‧‧Semiconductor bare wafer or arithmetic processing processor (bare wafer)
205‧‧‧Semiconductor bare wafer or memory (bare wafer)
206‧‧‧Intermediate substrate
207‧‧‧ adhesive layer
301‧‧‧1st semiconductor wafer
302‧‧‧2nd semiconductor wafer
303‧‧‧Bumps
304‧‧‧ pads
305‧‧‧Central reinforcing members
306‧‧‧Flexible circuit board (flexible board)
307‧‧‧ solder balls
308‧‧‧ plate-shaped reinforcing parts
309‧‧‧ hole
401‧‧‧ Large integrated circuit
402‧‧‧Rigid wiring substrate
403‧‧‧Flexible Wiring Substrate
404‧‧‧Unfilled material (underfil)
405‧‧‧ solder balls
406‧‧‧ motherboard
407‧‧‧bonding resin
501‧‧‧ wiring
502‧‧‧ wiring
503‧‧‧Wiring
504‧‧‧Operation processor components
505‧‧‧DC power supply
506‧‧‧through holes, via holes
507‧‧‧Printed circuit board
601‧‧‧ wiring
602‧‧‧ wiring
603‧‧‧ wiring
604‧‧‧Operation processor components
605‧‧‧DC power supply
606‧‧‧through holes, via holes
607‧‧‧Decoupling capacitor
608‧‧‧Printed circuit board
1A to 1C are cross-sectional views showing a semiconductor device according to a first embodiment of the present invention.
2 is a view showing a first surface of a flexible circuit board used in the semiconductor device of the present invention in which a plurality of memory elements and a plurality of passive components are mounted in a plane (front view).
3 shows that after mounting a plurality of memory elements and a plurality of passive components on a flexible circuit board, the support is adhered to the first surface of the flexible circuit board or formed on the first surface so as to surround the parts. The figure after the first external electrode of the surface is connected (the view directly above) is a view in which the flexible circuit board is bent on the two sides of the support.
Figure 4 is a cross-sectional view taken along line A-A' of Figure 3.
Fig. 5 is a cross-sectional view showing an example of a flexible circuit board used in the semiconductor device of the present invention.
Fig. 6 is a cross-sectional view showing a modification of the first embodiment of the present invention.
7 shows that after mounting a plurality of memory elements and a plurality of passive components on a flexible circuit board, the support is adhered to the first surface of the flexible circuit board so as to surround the parts, or is formed in the first surface. The figure after the connection of the 1st external electrode of one surface (front view) is a figure which bends a flexible circuit board in the one side of a support body.
8 shows a case where a plurality of memory elements and a plurality of passive components are mounted on a flexible circuit board, and the support is adhered to the first surface of the flexible circuit board or connected to the first surface so as to surround the parts. The figure after the first external electrode on one side (the view directly above) is a view in which the flexible circuit board is bent on the three sides of the support.
FIG. 9 shows that after mounting a plurality of memory elements and a plurality of passive components on a flexible circuit board, the support is adhered to the first surface of the flexible circuit board or to the formation of the flexible circuit board. The figure after the first external electrode of the first surface (front view) is a view in which the flexible circuit board is bent on the four sides of the support.
10A to 10E are views showing a manufacturing method according to the first embodiment of the present invention.
Figure 11 is a cross-sectional view showing a semiconductor device according to a second embodiment of the present invention.
Figure 12 is a cross-sectional view showing a semiconductor device according to a third embodiment of the present invention.
13A to 13E are views showing the features of the support used in the fourth embodiment of the present invention, and Figs. 13A to 13D are cross-sectional views, and Fig. 13E is a plan view as seen from directly above the groove side.
Figure 14 is a cross-sectional view showing a semiconductor device according to a fifth embodiment of the present invention.
15A and 15B are cross-sectional views showing a semiconductor device according to a sixth embodiment of the present invention.
Figure 16 is a cross-sectional view showing a semiconductor device according to a seventh embodiment of the present invention.
Figure 17 is a cross-sectional view showing a semiconductor device according to an eighth embodiment of the present invention.
Fig. 18 shows a printed circuit board on which the semiconductor device of the present invention is mounted in the ninth embodiment of the present invention.
Fig. 19A shows a BGA type DDR-DRAM package used in the semiconductor device of Embodiment 1 of the present invention.
Fig. 19B shows a BGA type three-dimensional image processor package used in the semiconductor device of the first embodiment of the present invention.
Fig. 19C shows a support used in the semiconductor device of the first embodiment of the present invention.
Fig. 19D is a cross-sectional view showing a flexible circuit substrate used in the semiconductor device of the first embodiment of the present invention.
Fig. 19E is a cross-sectional view showing the semiconductor device of the first embodiment of the present invention.
Fig. 19F shows a support used in the semiconductor device of the second embodiment of the present invention.
Fig. 20 shows a printed circuit board on which a semiconductor component fabricated using a related mounting technique (surface mounting technology) is mounted, and shows a conventional semiconductor device (No. 1).
Figure 21 shows a cross-sectional view of a related semiconductor device (2).
FIG. 22 is a cross-sectional view showing a semiconductor device (No. 3) of Patent Document 1 (JP-A-2006-190834).
FIG. 23 is a cross-sectional view showing a semiconductor device (No. 4) of Patent Document 2 (JP-A-2007-188921).
FIG. 24 shows a variation (ΔV) of the DC voltage (V) supplied to the arithmetic processor element when the arithmetic processor element that is switched at a high speed by the rise time t1 is mounted on the printed circuit board.
Figure 25 shows the equivalent circuit of Figure 24.
Figure 26 shows a diagram of mounting an operational processor component on a printed circuit board with a decoupling capacitor connected between the power line-ground (ground) lines of the processor element.
Figure 27 shows the equivalent circuit of Figure 26.
Fig. 28 is a cross-sectional, enlarged, cross-sectional view showing the flexible circuit board of the semiconductor device according to the tenth embodiment of the present invention.
1. . . Operational processor component
2. . . Memory component
3. . . Flexible circuit substrate
4. . . Support
5. . . Passive part
6. . . ditch
7. . . Heat sink
8. . . Solder bump (or solder ball)
9. . . External terminal of semiconductor device
10. . . The first side of the flexible circuit board
11. . . The second side of the flexible circuit board
12. . . First external electrode
13. . . Second external electrode
14. . . Third external electrode
15. . . heat sink
16. . . Side of the support
17. . . The surface on which the groove is formed on the opposite side of the front and back sides
18. . . Support side
19. . . External terminal surface
20. . . External terminal surface
A semiconductor device comprising: one flexible circuit substrate, wherein a first external electrode is provided on a first surface thereof, and second and third external electrodes are provided on a second surface, and at least two or more wiring layers are provided a majority of the passive components, including at least one of a resistor, a capacitor, and an inductor; and a support having at least one or more trenches for accommodating the plurality of memory components and the plurality of passive components; and An operation processor component; the flexible circuit substrate has an area larger than the support, and the plurality of memory components and the plurality of passive components are planarly mounted on the first surface of the flexible circuit substrate, and are electrically connected a first external electrode on the first surface, wherein the passive component is mounted in the vicinity of the memory component; and the support is adhered to the flexible circuit substrate so as to surround the plurality of memory components and the plurality of passive components The first surface is electrically connected to the first external electrode provided on the first surface, and the plurality of memory elements and the passive component are housed inside the groove of the support; the flexible circuit base The plate is bent along the outer circumference of the support body, and covers at least a part of the surface of the support body and at least a part of the surface of the support body opposite to the front surface of the surface on which the groove is formed. The circuit board is adhered to at least a part of the surface of the support; and the second surface on the opposite side of the front and back sides of the first external electrode to which the plurality of memory elements are mounted is provided with the second surface of the flexible circuit board An external electrode, wherein the arithmetic processor element is electrically connected to the second external electrode, and an external terminal surface of the arithmetic processor element is mounted with the external circuit surface of the plurality of memory elements interposed between the flexible circuit board and a plurality of passive parts are opposed to each other; a surface of the support body having a grooved surface opposite to the front and back sides, a third external electrode of the flexible circuit board, and a solder bump formed on the third external electrode; When the solder bump is defined as a bottom surface, the operational processor element is mounted on the top surface.
The semiconductor device of claim 1, wherein the area of the arithmetic processor element is larger than an area of the plurality of memory elements and the plurality of passive parts.
A semiconductor device comprising: one flexible circuit substrate, wherein a first external electrode is provided on a first surface thereof, and second and third external electrodes are provided on a second surface, and at least two or more layers are provided a wiring layer; a plurality of passive components including at least one of a resistor, a capacitor, and an inductor; and a support body provided with at least one or more grooves for accommodating the plurality of passive components; and one arithmetic processor element; the flexible The substrate area of the circuit board is larger than the support, and the plurality of passive components are mounted on the first surface of the flexible circuit board in a planar manner, and are electrically connected to the first external electrode of the first surface, and the support body surrounds the first circuit. a plurality of passive components are adhered to the first surface of the flexible circuit board or electrically connected to the first external terminal provided on the first surface, and the plurality of passive components are housed inside the groove of the support; the flexible The circuit board is bent along the outer circumference of the support body, covering at least a part of the side surface of the support body and at least a part of the surface of the support body on the opposite side of the front surface of the surface on which the groove is formed. Flexible circuit The plate is bonded to at least a portion of the surface of the support; and the second surface of the flexible circuit board is provided on the second surface opposite to the front and back sides of the first external electrode on which the plurality of passive components are mounted, and The arithmetic processor element is electrically connected to the second external electrode, and an external terminal surface of the arithmetic processor element is mounted so as to be opposed to the plurality of passive components via the flexible circuit substrate; and a surface of the support is formed The grooved surface is a surface opposite to the front and back sides, and has a third external electrode of the flexible circuit board, and a solder bump is formed on the third external electrode; and when the solder bump is defined as a bottom surface The operational processor component is mounted on the top surface.
A semiconductor device comprising: one flexible circuit substrate, wherein a first external electrode is provided on a first surface thereof, and second and third external electrodes are provided on a second surface, and at least two or more layers are provided a wiring layer; a plurality of memory elements; a support provided with at least one or more grooves for accommodating the plurality of memory elements; and one arithmetic processor element; the flexible circuit substrate area is larger than the support, and the majority The memory element is mounted on the first surface of the flexible circuit board in a planar manner, and is electrically connected to the first external electrode of the first surface; the support is adhered to the memory element so as to surround the plurality of memory elements The first surface of the flexible circuit board is electrically connected to the first external electrode provided on the first surface, and the plurality of memory elements are housed inside the groove of the support; the flexible circuit board is along the support And bending at least one part of the side surface of the support body and at least a part of the surface of the support body opposite to the front surface of the surface of the support surface, wherein the flexible circuit board is adhered to the surface Support at least part of the surface of the body a second surface on the opposite side of the front and back sides of the first external electrode on which the plurality of memory elements are mounted has a second external electrode of the flexible circuit board, and the arithmetic processor element is electrically connected to the second external electrode The external terminal surface of the arithmetic processor element is mounted so as to be opposed to the external terminal surface of the plurality of memory elements via the flexible circuit substrate; and the front surface of the surface of the support is formed with a groove surface a surface on the opposite side having a third external electrode of the flexible circuit board, and a solder bump formed on the third external electrode; When the solder bump is defined as a bottom surface, the operational processor component is mounted on the top surface.
The semiconductor device of any one of claims 1 to 4, wherein the operational processor component has at least one of a heat sink and a heat sink.
The semiconductor device according to any one of claims 1 to 4, wherein the arithmetic processor element and the plurality of memory elements, or the arithmetic processor element, are BGA (Ball Grid Array) type Package.
The semiconductor device according to any one of claims 1 to 2, wherein the plurality of memory elements are DRAM (Dynamic Random Access Memory), and the arithmetic processor element is an image. processor.
The semiconductor device according to any one of claims 1 to 2, wherein at least one of the plurality of memory elements is a multi-chip package or a package on package stacked on each other. structure.
The semiconductor device according to any one of claims 1 to 4, wherein the support system is made of a metal material and is electrically connected to the ground of the flexible circuit substrate.
The semiconductor device according to any one of claims 1 to 4, wherein at least a part of the support is composed of a material of a alloy of Ni, a ceramic such as Kovar, a ceramic, and Si.
The semiconductor device according to any one of claims 1 to 4, wherein the support body is provided with at least one of at least one through hole for accommodating the plurality of memory elements and the plurality of passive components. The above plate was fabricated by laminating a single plate.
The semiconductor device according to claim 11, wherein a portion of the support having at least a through-hole is made of a alloy containing Ni such as 42 alloy or Kovar.
The semiconductor device according to claim 11, wherein at least one of the materials constituting the support is made of any one of aluminum, aluminum alloy, titanium, titanium alloy, ceramic, and Si.
The semiconductor device of claim 11, wherein the support is constituted At least a portion of the laminated material of the body is bonded or connected to each other via a conductive material or an insulating material, or at least a portion is welded to each other.
The semiconductor device of claim 11, wherein the material constituting the laminate of the support is formed with a protrusion on a surface thereof, and another material overlapping the material is formed with a through hole or the protrusion The grooves, the materials of the laminate are connected to each other by the protrusions and portions of the through holes or grooves.
The semiconductor device according to any one of claims 1 to 4, wherein a plurality of through holes are provided around the groove of the support.
The semiconductor device according to claim 11, wherein a periphery of the through hole in the plate constituting the through hole of the support and a single plate constituting the support are provided at least one of the above Most through holes.
The semiconductor device according to any one of claims 1 to 4, wherein the memory element is in contact with the support via a heat conductive material.
The semiconductor device according to any one of claims 1 to 4, wherein a part of the first surface of the flexible circuit substrate is attached with a thermoplastic adhesive for bonding to a surface of the support A resin film or a thermosetting adhesive resin film before curing.
The semiconductor device according to any one of claims 1 to 4, wherein a heat sink is mounted on the arithmetic processor element, and the heat sink is covered in a shape of the entire semiconductor module.
The semiconductor device according to any one of claims 1 to 4, wherein, in the flexible circuit substrate, the number of wiring layers in a bent region along the support is smaller than that in other regions not bent. The number of layers is small.
A printed circuit board characterized by being mounted with the semiconductor device according to any one of claims 1 to 21.
An electronic device characterized by being mounted with the semiconductor device according to any one of claims 1 to 21.
An electronic device characterized by being loaded with a printed circuit board of claim 22 of the patent application.
A method of fabricating a semiconductor device, comprising the steps of: (a) mounting a plurality of passive components on the first surface of the flexible circuit board; (b) mounting a plurality of memory components on the first surface of the flexible circuit board; (c) having a plurality of memory for housing the plurality of memories a support for the element and the groove of the plurality of passive parts is mounted on the first surface of the flexible circuit board, and the plurality of memory elements mounted on the first surface of the flexible circuit board and the plurality of passive parts Covering (d) bending the flexible circuit board along the outer circumference of the support body, covering at least one side surface of the support body and the opposite side of the front surface of the surface of the support body on which the groove is formed At least a part of the surface of the flexible circuit board is bonded to at least a part of the surface of the support; (e) the first of the flexible circuit board on which the plurality of memory elements and the plurality of passive components are mounted The external electrode has an arithmetic processor element mounted on the second external electrode of the flexible circuit board formed on the second surface opposite to the front and back sides; and (f) a grooved surface is formed in the surface of the support The flexible circuit to which the opposite side of the back side is bonded On the first external electrode plate 3, the solder bump is formed.
The method of manufacturing a semiconductor device according to claim 25, wherein the steps of (a) and (b), the steps (a) and (b) and (c), and the steps (e) and (f) , at least one of which steps are performed simultaneously.
A method of manufacturing a semiconductor device, comprising the steps of: (a) mounting a plurality of passive components on a first surface of a flexible circuit board; and (b) mounting a support having a trench for accommodating the plurality of passive components; a plurality of passive components mounted on the first surface of the flexible circuit board on the first surface of the flexible circuit board; (c) the flexible circuit board is disposed along the periphery of the support Bending, covering at least a part of the one side surface of the support body and at least a part of the surface of the support body on the opposite side of the front surface of the surface on which the groove is formed, and bonding the flexible circuit substrate to the support body At least a part of the surface; (d) a second outer surface of the flexible circuit board formed by the first external electrode of the flexible circuit board on which the plurality of passive components are mounted and the second surface opposite to the front and back sides Electrode, mounting an operational processor component; and (e) A solder bump is formed on the third external electrode of the flexible circuit board to which the surface on the opposite side of the front surface of the surface on which the groove is formed is formed.
The method of manufacturing a semiconductor device according to claim 27, wherein the steps of (a) and (b) and the steps (d) and (e) are performed simultaneously with at least one of the steps.
A method of manufacturing a semiconductor device, comprising the steps of: (a) mounting a plurality of memory elements on a first surface of the flexible circuit board; and (b) supporting the trench for accommodating the plurality of memory elements. The body is mounted on the first surface of the flexible circuit board, and covers the plurality of memory elements mounted on the first surface of the flexible circuit board; (c) the flexible circuit board is supported along the support The body is bent at a periphery, and at least a part of the surface of the surface of the support and the surface of the support opposite to the back surface of the surface of the support is bonded to at least a part of the surface of the support, and the flexible circuit substrate is bonded At least a part of the surface of the support; (d) the flexible circuit formed by the first external electrode of the flexible circuit board on which the plurality of memory elements are mounted and the second surface opposite to the front and back sides And mounting an arithmetic processor element on the second outer electrode of the substrate; and (e) a third outer surface of the flexible circuit board to which the surface opposite to the front surface of the surface on which the groove is formed is formed on the surface of the support On the electrodes, solder bumps are formed.
The method of manufacturing a semiconductor device according to claim 29, wherein the steps of (a) and (b) and at least one of steps (d) and (e) are performed simultaneously.
TW98110122A 2008-03-28 2009-03-27 Semiconductor apparatus and manufacturing method thereof, printed circuit board and electronic apparatus TWI423418B (en)
JP2008087138 2008-03-28
TW201003889A TW201003889A (en) 2010-01-16
TWI423418B true TWI423418B (en) 2014-01-11
ID=41114082
TW98110122A TWI423418B (en) 2008-03-28 2009-03-27 Semiconductor apparatus and manufacturing method thereof, printed circuit board and electronic apparatus
US (2) US8338940B2 (en)
JP (1) JPWO2009119904A1 (en)
CN (1) CN101960591A (en)
TW (1) TWI423418B (en)
WO (1) WO2009119904A1 (en)
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2009-03-26 WO PCT/JP2009/056851 patent/WO2009119904A1/en active Application Filing
2009-03-26 US US12/920,265 patent/US8338940B2/en active Active
2009-03-26 CN CN2009801071196A patent/CN101960591A/en not_active Application Discontinuation
2009-03-26 JP JP2010505980A patent/JPWO2009119904A1/en active Pending
2009-03-27 TW TW98110122A patent/TWI423418B/en active
2012-11-19 US US13/680,975 patent/US8956915B2/en active Active
TW201003889A (en) 2010-01-16
US8338940B2 (en) 2012-12-25
US20130078764A1 (en) 2013-03-28
CN101960591A (en) 2011-01-26
WO2009119904A1 (en) 2009-10-01
JPWO2009119904A1 (en) 2011-07-28
US20110031610A1 (en) 2011-02-10
US8956915B2 (en) 2015-02-17
US20020158324A1 (en) 2002-10-31 Semiconductor device, method of manufacturing electronic device, electronic device, and portable infromation terminal