Electronic component module and method of manufacturing the same

An electronic component module includes: a substrate including a conductive pattern; an electronic component provided to the substrate; a sealing portion covering the electronic component and substrate, and having an upper surface and a side surface that form an edge portion; a contact portion configured to be electrically connected with the conductive pattern, the contact portion exposed on a vertical surface continuous with the side surface of the sealing portion; a removal portion formed by removing the predetermined edge portion formed by the upper surface and the side surface of the sealing portion; and a shielding film covering the upper surface, the side surface and the contact portion of the sealing portion. The removal portion is a region allowing a conductive material to pass therethrough so that the contact portion is covered with the shielding film, the conductive material being scattered in vacuum atmosphere lower than atmospheric pressure.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims the benefit of priority to Japanese Patent Application No. 2017-67067, filed Mar. 30, 2017, of which full contents are incorporated herein by reference.

BACKGROUND OF THE INVENTION

Technical Field

The present disclosure relates to an electronic component module and a method of manufacturing the electronic component module.

Background Art

A semiconductor package is known in which an electromagnetic shield is formed on a surface thereof so as to suppress Electro Magnetic Interference (EMI) generated from a semiconductor device. In manufacturing this type of semiconductor devices, for example, a plurality of semiconductor packages obtained by singulation from an assembly substrate is arranged and fixed at predetermined intervals on a carrier, and then a shielding film is formed by a film forming means such as sputtering.

However, it takes time and efforts to arrange and fix such singulated semiconductor packages on the carrier. In addition, since the semiconductor packages are arranged at predetermined intervals on the carrier, productivity is reduced. Furthermore, depending on film forming means, a film forming material goes around to the back surface of the semiconductor package, which causes deterioration in quality. Further, when singulation is performed by a dicing apparatus, the area of a ground electrode exposed on the side surface of a substrate is limited, which results in increase in contact resistance.

Accordingly, an aspect of the present disclosure is to provide an electronic component module capable of forming a shielding film in a state of an assembly substrate and enhancing productivity, and a method of manufacturing the electronic component module.

SUMMARY OF THE INVENTION

An electronic component module according to an embodiment of the present disclosure comprises: a substrate including a conductive pattern; an electronic component provided to the substrate; a sealing portion covering the electronic component and the substrate, the sealing portion having an upper surface and a side surface, the upper surface and the side surface forming an edge portion; a contact portion configured to be electrically connected with the conductive pattern, the contact portion exposed on a vertical surface continuous with the side surface of the sealing portion; a removal portion formed by removing the predetermined edge portion formed by the upper surface and the side surface of the sealing portion; and a shielding film covering the upper surface, the side surface and the contact portion of the sealing portion, the removal portion being a region allowing a conductive material to pass therethrough so that the contact portion is covered with the shielding film, the conductive material being scattered in a vacuum atmosphere lower than an atmospheric pressure.

DETAILED DESCRIPTION

Hereinafter, various embodiments of the present disclosure will be described with reference to drawings as appropriate. In the drawings, common or similar components are given the same or similar reference numerals.

A description will be given, hereinafter, using the following coordinate axes for convenience sake. That is, the positive direction of a Z-axis is set to be a vertically upward direction. The positive direction of a Y-axis is set to be orthogonal to the Z-axis as well as a direction from the front to the rear in the drawings. The X-axis is set to be a direction orthogonal to the Y-axis and Z-axis. Accordingly, the upper side and the lower side indicates the positive side and the negative side of the Z-axis, respectively, while the right side and the left side indicates the positive side and the negative side of the X-axis, respectively.

First Embodiment

==Configuration of Electronic Component Module1==

A configuration of an electronic component module1according to a first embodiment will be described with reference toFIGS. 1A, 1B, 2A, and 2B.FIGS. 1A, 1B, 2A, and 2Bare schematic diagrams illustrating an electronic component module1according to a first embodiment.

The electronic component module1includes, as illustrated inFIGS. 1A and 1B, a substrate10, an electronic component20, a sealing portion30, a contact portion40, a removal portion50, and a shielding film60.

The substrate10is made of an insulating material, such as resin, alumina, glass, ceramics, a composite material, and includes a conductive pattern11(for example, ground wiring, Vcc, etc.) inside thereof. A part of the conductive pattern11is configured to be connected with a GND, for example.

The substrate10includes a via53configured to electrically connect GND wiring patterns formed in different layers to each other. Here, the via53may be a through hole provided in an upper layer or a lower layer of an electrode, or such vias53may be a via and a through hole. Hereinafter, it is assumed that the vias53includes a through hole.

Further, the substrate10includes an electrode52. The electrode52may be formed inside (in an inner layer of) the substrate10, or may be formed on a surface (for example, upper surface) of the substrate10. It should be noted that the electrode52may be ground wiring. Further, the substrate10includes, for example, a terminal51for connecting the GND, for example, on the lower surface side of the electronic component module1. Note that a semiconductor material such as Si may be used for the substrate. This is a so-called silicon interposer. A Si substrate has substantially the same coefficient of thermal expansion as an IC to be mounted, and thus has been frequently used recently. A semiconductor device including PN junction may be incorporated in the Si substrate. At least one layer of a conductive pattern is formed on this Si substrate, and such at least one layer thereof is subjected to an insulating process using an inorganic insulation film provided on a lower layer. For example, SiO2, SiNx, or the like is used. For example, the substrate10inFIG. 1Ais laminated on the Si substrate.

The electronic component20is provided, for example, on the upper surface side of the substrate10. Here, as illustrated inFIG. 1B, the electronic component20may include a passive element such as a resistor, inductor, and/or capacitor, in addition to a semiconductor chip. Further, the electronic component20may be a filter or the like. As will be described later, assuming that a semiconductor chip is commonly tall while a chip resistor and a chip capacitor are short, an empty space is created above such a short component and can be utilized as a position for the removal portion50.

The sealing portion30is a protective member that covers the electronic component20and the substrate10. The sealing portion is formed using thermosetting resin for molding, such as epoxy resin and cyanate resin. The sealing portion30includes an upper surface31, a side surface32extending downward from an edge portion of the upper surface31. Thus, a connecting portion between the upper surface31and the side surface32forms an edge portion33.

The contact portion40is a portion having a vertical surface formed with the electrode52that is exposed by dicing. Further, the contact portion40is configured to be electrically connected to the terminal51and the conductive pattern11. The contact portion40is configured to be electrically connected to the GND, for example, through the terminal51and/or the conductive pattern11, via the electrode52.

The removal portion50is formed by removing the edge portion33formed by the upper surface31and the side surface32of the sealing portion30(also defined as a connection portion between the upper surface31and the side surface32, or an edge portion of the upper surface31). The removal portion50is a region (space) where a conductive material scattered in a vacuum atmosphere having a pressure lower than atmospheric pressure is allowed to pass therethrough, such that the contact portion40is covered with the shielding film60. In the present embodiment, the edge portion33is a virtual area indicated by dotted lines illustrated inFIGS. 1A, 1B, 2A, and 2Bis positioned in the vicinity of the upper surface of the sealing portion30, and is a portion recessed downward or inclined.

The removal portion50has a shape of a groove, for example, however, it is not limited thereto. The removal portion50may be a slope inclined outward as illustrated inFIGS. 2A and 2B(on the negative or positive side in the X-axis inFIGS. 2A and 2B). Hereinafter, the second groove is not limited to the shape as of the removal portion50according to the present embodiment, but includes the shape as of a removal portion50as illustrated inFIGS. 2A and 2B.

Since the removal portion50is formed as such, scattered particles of a conductive material can be allowed to pass through a space (region) of the removal portion50in a process of forming the shielding film60. That is, the removal portion50is provided to ensure a space capacity, so that a film is formed thicker on a side surface of a first groove71as inFIG. 11. More preferably, the removal portion50is formed such that a length (distance) B of the side surface from the bottom surface of the first groove71to the bottom surface of the removal portion50is twice or smaller with respect to the width A of the first groove71. Accordingly, by virtue of the provision of the removal portion50, scattered particles can easily enter the first groove71, and a thickness of the film can be ensured. This can reduce contact resistance between the contact portion40and the shielding film60.

Further, it is preferable that the removal portion50is formed vertically above the electronic component20. That is, when viewed from the upper surface side, the removal portion50is arranged so as to overlaps all or a part of an electronic component20. With such an arrangement, it is possible to reduce the size and cost of the electronic component module1.

Thus, even in a case where a space between packages on an assembly substrate15(i.e., a width of the first groove71) is narrow, a sufficient film thickness of the shielding film60can be formed on a side surface of such a package. Accordingly, productivity with respect to the electronic component module1can be enhanced. It should be noted that, in sputtering or the like, scattering is caused due to Ar, and thus the removal portion50may be provided on the side where the contact portion40is provided as inFIG. 7B. However, considering the characteristics of scattered matters of traveling in straight lines, as inFIG. 7C, it is preferable to provide the removal portion50on the side surface opposed to the side surface where the contact portion40is exposed (in the drawing, on the side on which a short element20A is disposed).FIGS. 1B and 2Billustrate one obtained by forming the shielding film60in this state and performing singulation. In this state, due to the contact portion40, a large number of the scattered matters passing therethrough can reach the contact portion40and a film thickness can be secured. In specific, inFIGS. 1B and 2B, since the shielding film60is formed to be thicker on the side surface where the contact portion40is provided than on the side surface on the side where the removal portion50is provided, contact resistance can be reduced.

Vapor deposition, sputtering or CVD is used as the film forming method of forming the shielding film60. The shielding film60is a conductive film that covers the upper surface31and the side surface32of the sealing portion30and the contact portion40. The shielding film60is configured to be electrically connected to the contact portion40, and suppress an electromagnetic wave generated inside the electronic component module1from leaking to the outside. Further, noise from the outside does not enter into the module, either.

The shielding film60is made of a conductive metal material, such as Cu, Ni, Ti, Au, Ag, Pd, Pt, Fe, Cr, or SUS (stainless steel). Further, the shielding film60may be an alloy using some multiple materials of the aforementioned metal materials, or a laminated film using some multiple materials of the aforementioned metal materials. Furthermore, the shielding film60may be an alloy using any one of the aforementioned metal materials as a main material. In general, a SUS film is formed on (outside) a film formed using Cu as a main material.

The above description has been made such that the electronic component20is provided on the upper surface side of the substrate10, however, it is not limited thereto. For example, as illustrated inFIGS. 3A and 3B, a wireless region100where the electronic component20is disposed and an antenna region101where a wiring pattern serving as an antenna21may be provided on the upper surface of the substrate10. Even in this case, the contact portion40is formed in the same manner as described above. That is, in this case, the removal portion50results in a space above the antenna. In other words, a space portion SP illustrated inFIG. 3Ais a portion corresponding to a second groove72positioned above the antenna illustrated inFIG. 7C.

==Method of Manufacturing Electronic Component Module1==

A method of manufacturing the electronic component module1including such a configuration will be described with reference toFIGS. 4A to 11. Here, the substrate10, which is an example of a first insulating substrate, is included in the assembly substrate15, which is an example of a second insulating substrate, and the substrate10indicates a substrate eventually obtained by singulation.

First, the assembly substrate15(second insulating substrate) is prepared as inFIGS. 4A and 4B. The second insulating substrate15is formed such that a plurality of component mounting regions S, each of which the electronic component20,20A is disposed, is disposed on the substrate10, and the second insulating substrate15includes a dicing line (dicing region) DL between the component mounting regions S adjacent to each other. Subsequently, as illustrated inFIGS. 5A and 5B, the sealing portion30is provided, which covers a surface, where the electronic components20,20A are provided, with an insulating material. The electronic component20is a tall component, while the electronic component20A is a short component. For example, the electronic component20is an IC chip, and such electronic components20A are a passive component, a chip capacitor, and/or the like. An IC chip and/or a package may be sealed independently, or electronic components other than them may be disposed. It should be noted that a space may be provided from the upper side to the lower side of the mounting portion of the electronic component20A. Further, the sealing portion30may be formed such that sealing is performed using a thermosetting resin by transfer molding, sealing is performed using a thermoplastic resin by injection molding, and further sealing is performed with an insulating resin being printed by screen printing or being coated by potting.

Next, as illustrated inFIGS. 6A and 6B, the dicing region DL is ground by a grinding apparatus (dicing apparatus) to form the groove71(first groove), such that the side surfaces32of the sealing portions30are formed so as to surround the component mounting regions S. In specific, dicing is performed from a surface of the sealing portion30to a surface of the substrate10or to an inner layer of the substrate, to form the first groove71such that the side surface of the substrate10is exposed. Accordingly, the contact portion40exposed on the side surface of the substrate10is formed. Note that this first groove, for example, having a width of about 350 μm and a depth of about 550 μm.

After the first groove71is formed, the second groove72(removal portion50) is formed, as illustrated inFIG. 7B or 7C. As illustrated inFIG. 10, the second groove72(removal portion50) is formed on the front surface31side of the sealing portion30, so as to be continuous with the first groove71, have a width equal to or greater than the width of first groove71, and have a depth shallower than the first groove71. As a result, in a downstream process, the shielding film60can be formed to have a sufficient film thickness on the side surface of a package, even in a case where intervals between packages on the assembly substrate15(i.e., a width of the first groove71) is small.

Then, as illustrated inFIG. 8, the shielding film60is formed, using a conductive material, on the upper surface31(front surface) and the side surface32of the sealing portion30in a vacuum atmosphere having a pressure lower than atmospheric pressure, by the vacuum film-forming method, such as vapor deposition, sputtering or CVD. On such an occasion, as illustrated inFIG. 11, a scattered conductive material is caused to pass through the second groove72(removal portion50) in a low vacuum atmosphere, to form the shielding film60on a side surface of the substrate10. Preferably, the second groove72is formed such that a length (distance) B of the side surface from the bottom surface of the first groove71to the bottom surface of the removal portion50is twice or smaller with respect to a width A of the first groove71.

Finally, as illustrated inFIG. 9, the electronic component modules1are produced such that the dicing region DL is further ground to separate the assembly substrate15, to obtain the singulated substrates10(first insulating substrate). Accordingly, when only the first groove71is formed using a commonly used dicing blade, as illustrated inFIG. 6B, and thereafter the shielding film60is formed by sputtering without the processes inFIGS. 7A to 7C, a width of the groove is small, resulting in a state where the amount of scattered matters reaching the contact portion40is small. According to the present disclosure, the second groove72can secure a floating space of these scattered matters, and further reduce the aspect ratio, thereby increasing the amount thereof reaching the contact portion40. Here, a description will be simply given with reference toFIGS. 7B and 7C. An aspect of the present disclosure is to improve shielding metal adhesion to the contact portion40by virtue of the provision of the removal portion50. The removal portion50may be positioned above the contact portion40as illustrated inFIG. 7B; positioned above the side surface opposite to the side surface where the contact portion40is provided as illustrated inFIG. 7C; or positioned on both sides as illustrated inFIG. 18. However, considering the characteristics of scattered matters of traveling in straight lines, such positioning as inFIG. 7Cor inFIG. 18is preferable. This is because, as indicated by arrows AR, the scattered matters are allowed to pass through the removal portion50, to reach the contact portion40. In this case, when seeing a cross section of the second groove72, scattered matters are deposited such that a film thickness of a first side surface on the contact portion40side becomes greater than a second side surface opposed to the first side surface. Alternatively, the shielding film on the first side surface side has a deposited volume greater than the shielding film on the second side surface side.

Second Embodiment

An electronic component module2according to a second embodiment will be described with reference toFIGS. 12 to 14.FIG. 12is a schematic diagram illustrating the electronic component module2according to the second embodiment.FIGS. 13A and 13Bare diagrams illustrating positional relationships of vias253(or through holes) formed inside the electronic component module2ofFIG. 12when viewed from the upper surface side.FIGS. 14A and 14Bare schematic diagrams illustrating the electronic component module2according to the second embodiment in which a solid ground254extending from the vicinity of an upper side51to the vicinity of a lower side S2, in the drawing, of a substrate210is used as an electrode252in an inner layer.

The electronic component module2according to the second embodiment includes the substrate210, an electronic component220, a sealing portion230, a contact portion240, a removal portion250and a shielding film260, similarly to the first embodiment. However, the electronic component module2according to the second embodiment is different from the electronic component module2according to the first embodiment in that the contact portion240is formed including the via253, a through hole, or the solid ground254(the solid ground indicates here that, for example, all, substantially all, or a half of a surface of a layer in a printed-circuit board is convered with GND metal. This can strengthen and solidify ground (GND)). Thus, in the following description, the contact portion240will be described.

The contact portion240includes a vertical surface formed with the electrode252and/or the via253exposed by dicing. Further, the contact portion240is electrically connected with a terminal251and/or a conductive pattern211. The contact portion240may include at least one of the electrode252, the via253, or a through hole. That is, as illustrated inFIGS. 13A and 13B, the contact portion240is formed when a dicing line DL2is formed so as to overlap with the electrode252, the via253, or a through hole. In other words, the vias253are disposed, as illustrated inFIGS. 13A and 13B, so as to overlap with the dicing line DL2when viewed from the upper surface side. That is, the contact portion240is configured to be electrically connected to the GND, for example, through the terminal251and/or the conductive pattern211, via the electrode252, the via253or a through hole, the contact area can be increased according to the number of the contact portion240. Further, if the via253is the above-described solid ground, the contact area can be increased also.

A plurality of the vias253is provided. InFIG. 13A, the vias253are arranged in a row along the dicing line DL2, however, they may be provided so as to form a plurality of rows as illustrated inFIG. 13B. The vias253do not necessarily need to be regularly arranged, and may be irregularly (at random) arranged in the vicinity of the dicing line DL2. With such a configuration, even if the position of the dicing blade is displaced, one or some vias253(or through hole) coincide with the dicing line DL2, and the contact portion240can be formed.

In both cases ofFIGS. 13A and 13B, by causing the plurality of the vias253to overlap with the dicing line DL2, the exposed area of a conductive portion such as the vias253exposed on the side surface of the electronic component module2is increased. Accordingly, the contact area between the conductive portion such as the via253and the shielding film260, which will be describe later, is increased. Accordingly, the shielding film260is formed in the conductive portion such as the via253, and thus it is possible to reduce contact resistance of the shielding film260in the contact portion240.

Further, as illustrated inFIGS. 14A and 14B, the contact portion240may include the solid ground254in an inner layer of the substrate210. It should be noted that the solid ground254is a ground electrode provided to a predetermined insulation layer in the substrate20, to have a planar extent. Here, since the solid ground254extends from the upper side51to the lower side S2in the drawing, the exposed area can be increased. This can reduce contact resistance of the shielding film260in the contact portion240. For reference,FIG. 14Billustrates a relationship between the solid ground54and the dicing line DL2when viewed from the upper surface. It should be noted thatFIG. 14Aillustrates the solid ground254as being provided to a front layer of the substrate, however, the solid ground254may be provided in an inner layer or on a back surface of the substrate210.

Third Embodiment

An electronic component module3according to a third embodiment will be described with reference toFIG. 15.FIG. 15is a schematic diagram illustrating the electronic component module3according to the third embodiment.

The electronic component module3according to the third embodiment includes a substrate310, an electronic component320, a sealing portion330, a contact portion340, a removal portion350and a shielding film360, similarly to the first and second embodiments. However, the electronic component module3according to the third embodiment is different from the electronic component modules1and2according to the first and second embodiments in that the contact portion340includes a vertical surface and a horizontal surface that are formed with an electrode352and a via353exposed by dicing. Thus, in the following description, the contact portion340will be described.

The contact portion340is a portion having a vertical surface and a horizontal surface that are formed with the electrode352and the via353exposed by half-cut dicing the substrate310. Further, the contact portion340may include at least one of the electrode352, the via353, or a through hole. Further, the contact portion340may include a solid ground (not illustrated).

The electrode352, the via353, a through hole, and/or a solid ground is exposed, by dicing, on the sealing portion330. In this state, the contact portion340includes a vertical surface341(surface parallel to YZ plane) of the substrate310continuous with a side surface332of the sealing portion330, and a horizontal surface342(surface parallel to XY plane) of the substrate310continuous with this vertical surface341. A curved surface343lies between the vertical surface341and the horizontal surface342. The curvature of a curve in the curved surface343varies with the degree of sharpness (wear-out) of a blade of the cutting apparatus that was used. However, it is desirable to satisfy the relationships of film thicknesses of the shielding film360which will be described later.

As can be applied in all the following embodiments, a portion corresponding to the horizontal surface342of the contact portion340may be a burr produced in the bottom surface when dicing. InFIG. 15, dicing is stopped half way in the thickness direction of the substrate310such that the via353and the electrode352are exposed on the horizontal surface342. However, when swarf, so-called burr, of the via353or the electrode352positioned on the lower side remains in the horizontal surface342integrally with the electrode352even after shaving (grinding) has been completely finished, the shielding film360may be deposited on this burr. Further, cutting on the dicing line may be performed by laser processing. Such cutting may be performed also by waterjet process, and this implements formation of a groove.

The above-described film forming method has such features that, for example, on the basis of the result of film formation by sputtering, a thick film is formed on the horizontal surface342, while a thinner film is formed on the vertical surface341as compared with on the horizontal surface342. Further, on the vertical surface341, a film is formed thinner toward the −Z-direction. In view of such features of the film forming method, by exposing the electrode352or the like on the horizontal surface342of the contact portion340, the shielding film360can be formed to be relatively thick thereon. Further, the shielding film360is formed to be thicker also on a curved portion343than on the vertical surface341(further, thinner than on the horizontal surface342). This can reduce contact resistance between the contact portion340and the shielding film360, thereby enhancing effects of suppressing EMI by virtue of the shielding film360.

Here, it is preferable that thicknesses of the shielding film360in various parts are in the following relationship. That is, a relationship of t13>t33 and further a relationship of t23>t33 or t43>t33 are satisfied, where t13 is a film thickness of the shielding film360on the upper surface331of the sealing portion330, t23 is a film thickness of the shielding film360on the horizontal surface342of the contact portion340, t33 is a film thickness of the shielding film360on the side surface332of the sealing portion330, and t43 is a film thickness of the shielding film360on the curved surface343of the contact portion340. This is because, particularly, the scattered particles by vapor deposition, sputtering, or the like under low vacuum have the characteristics of traveling in straight lines. Thus, with the curved portion and horizontal portion, it is possible to ensure the thickness of the shielding film, reduce contact resistance, and further enhance adhesion.

Fourth Embodiment

An electronic component module4according to a fourth embodiment will be described with reference toFIGS. 16 to 18.FIG. 16is a schematic diagram illustrating the electronic component module4according to the fourth embodiment.FIG. 17is a diagram illustrating, in detail, the process of forming a first groove471, a second groove472(removal portion450),473(removal portion451), in a process of manufacturing the electronic component module4ofFIG. 16.FIG. 18is a diagram illustrating, in detail, a process of forming a shielding film460in the process of manufacturing the electronic component module4ofFIG. 16.

The electronic component module4according to the fourth embodiment includes a substrate410, an electronic component420, a sealing portion430, a contact portion440, the removal portion450, and the shielding film460, similarly to the first to third embodiments, and further includes the removal portion451. The removal portion451is formed at an edge434on the side opposite to the removal portion450, as illustrated inFIGS. 16 and 17.

The removal portion451is formed, for example, on a side surface opposed to a vertical surface where the contact portion440is formed. That is, when describing with reference toFIG. 17, the first groove471is formed using a first blade DB1, and subsequently, the second groove473having a width greater than the first groove471is formed using a second blade DB2, thereby being able to form the removal portion451. Accordingly, as illustrated inFIG. 18, more metal particles by sputtering having the characteristics of traveling in straight lines can enter the bottom portion of the first groove471, as compared with a case where only the removal portion450is provided, and thus a film can be formed to be thicker with respect to the contact portion440.

It is preferable that the removal portion451is formed, as illustrated inFIG. 18, such that a length (distance) B of the side surface from the bottom surface of the first groove471to the bottom surface of the second groove473(removal portion451) is twice or smaller with respect to a width A of the first groove471. Since the removal portion451is formed as such, it is possible that more scattered particles of a conductive material can be allowed to pass through a space (region) formed by the removal portion451, in the process of forming the shielding film460. In particular, scattered matters indicated by arrows AR pass through the removal portion451of an electronic component module on the left side, and travel to the contact portion440of an electronic component module on the right side. Thus, there is an advantage that the deposition rate of scattered matters can be increased.

It is preferable that at least one of the removal portions450,451is formed vertically above the electronic component420(seeFIG. 16). That is, it is preferable that at least one of the removal portions450,451is arranged to overlap with all or a part of the electronic component420when seeing from the upper surface side. With such an arrangement being employed, it becomes possible to reduce the size and cost of the electronic component module4.

Further, in order for at least a part of the removal portions450,451to reduce the size and cost of the electronic component module4, it is considered that the electronic component420having a low height (a length in the Z-axis direction) is disposed in the vicinity of the outer periphery (side surface432) of the electronic component module4. Further, this can be achieved without using extra space, if a chip resistor and/or a chip capacitor having a height lower than the electronic component420is disposed in the vicinity of the periphery of a substrate and at least a part of an upper surface thereof results in the removal portion451constituted by the second groove473.

Summary

According to an embodiment of the present disclosure, it becomes possible to form the shielding film60(260,360,460) in a state of an assembly substrate. Thus, rearrangement and tape fixing of semiconductor packages, in a case where film formation is performed after singulation, is unnecessary. Further, it is possible to reduce manufacturing cost since productivity is enhanced. Further, there is no wraparound of a film forming material to the back side of the substrate10(210,310,410), as in the case where film formation is performed after singulation, thereby improving quality and yields. In specific, singulation is performed by cutting at a portion indicated by a sign FC, after attachment of the shielding film. Thus, as illustrated inFIG. 16, the shielding film460is not formed, particularly, in the vicinity of FC and the back side thereof.

Further, it is preferable that the removal portion50(250,350,450,451) is formed above the electronic component20(220,320,420). With such an arrangement being employed, it is possible to reduce the size and cost of the electronic component module1,2,3,4.

Further, the contact portion340,440is configured to be electrically connected with the conductive pattern311,411, and the contact portion340,440has the vertical surface341,441continuous with the side surface332,432of the sealing portion330,430, and the horizontal surface342,442continuous with the vertical surface341,441. With provision of the horizontal surface342,442, it is possible to reduce contact resistance between the contact portion340,440and the shielding film360,460.

Further, the contact portion240,340,440is configured to be electrically connected with the conductive pattern211,311,411, and includes at least one of the electrode252,352,452provided to a surface layer or an inner layer of the substrate210,310,410; the via253,353,453provided so as to connect between the electrode252,352,452and a layer thereabove or a layer therebelow, or between the layers; or a through hole provided to an upper layer or a lower layer with respect to the electrode52,252,352,452. According to such an embodiment, the contact area between the contact portion240,340,440and the shielding film260,360,460is increased, and thus contact resistance can be reduced.

Further, it is preferable that the electrode252,352,452of the contact portion240,340,440includes the solid ground254. According to such an embodiment, the contact area between the contact portion40(140,240,340,440,540) and the shielding film60(160,260,360,460,560) is increased, and thus contact resistance can be lowered.

The plurality of vias253,353,453or through holes is provided at random or provided in a row, in a portion corresponding to the side surface232,332,432of the sealing portion230,330,430. According to such an embodiment, it is easy to form the contact portion240,340,440to have the vias253,353,453or through holes when dicing is performed.

Further, it is preferable that the contact portion340,440includes the curved surface343,443between the vertical surface341,441and the horizontal surface342,442. In such an embodiment, it is possible to secure a sufficient film thickness of the shielding film360,460. Thus, it is possible to reduce resistance of the shielding film360,460, as well as suppress the shielding film360,460from peeling from the electronic component module3,4, which leads to enhancement of quality of the electronic component module3,4.

Further, it is preferable that t13>t33, t14>t34, and t23>t33, t24>t34 or t43>t33, t44>t34, where t13, t14 is a film thickness of the shielding film360,460in the upper surface331,431of the sealing portion330,430; t23, t24 is a film thickness of the shielding film360,460in the horizontal surface342,442of the contact portion340,440; t33, t34 is a film thickness of the shielding film360,460in the side surface332,432of the sealing portion330,430; and t43, t44 is a film thickness of the shielding film360,460in the curved surface343,443of the contact portion340,440. According to such an embodiment, it is easy to form the shielding film360,460having a sufficient film thickness using a vacuum film forming technique such as vapor deposition, sputtering, or CVD. This leads to enhancement of productivity and quality of the electronic component module3,4.

The second groove72(272,372,472,473) is formed such that a length of the side surface32(232,332,432) from the bottom surface of the first groove71(271,371,471) to the bottom surface of the second groove72(272,372,472,473) is twice or smaller with respect to a width of the first groove71(271,371,471). According to such an embodiment, it is easy to form the shielding film60(260,360,460) having a sufficient film thickness using the vacuum film forming technique, such as vapor deposition, sputtering, or CVD.

Although embodiments of the present disclosure have been described above, the present disclosure is not limited thereto. The foregoing materials, shapes, and arrangements of components are merely embodiments for implementing the present disclosure, and can be variously changed without departing from the gist the disclosure.