Source: https://patents.google.com/patent/CN105990266B/en
Timestamp: 2019-12-09 09:44:23
Document Index: 691406080

Matched Legal Cases: ['art 1310', 'art 1310', 'art 1310', 'art 1310', 'art 1310', 'art 1', 'art 1310', 'art 1310', 'art 1310', 'art 1310', 'art 4310', 'art 4310', 'art 510', 'art 110', 'art.\n9']

CN105990266B - The package module and its manufacturing method of circuit for power conversion - Google Patents
The package module and its manufacturing method of circuit for power conversion Download PDF
CN105990266B
CN105990266B CN201510088406.4A CN201510088406A CN105990266B CN 105990266 B CN105990266 B CN 105990266B CN 201510088406 A CN201510088406 A CN 201510088406A CN 105990266 B CN105990266 B CN 105990266B
CN201510088406.4A
CN105990266A (en
洪守玉
2015-02-26 Application filed by 台达电子工业股份有限公司 filed Critical 台达电子工业股份有限公司
2015-02-26 Priority to CN201510088406.4A priority Critical patent/CN105990266B/en
2016-10-05 Publication of CN105990266A publication Critical patent/CN105990266A/en
2018-12-07 Publication of CN105990266B publication Critical patent/CN105990266B/en
The invention discloses a kind of package module of circuit for power conversion and its manufacturing methods.The package module of the circuit for power conversion includes: substrate, plastic packaging layer and multiple pins.Power device is installed, multiple pins are electrical connected with power device on substrate.One side of the plastic packaging layer covering substrate with power device and multiple pins at least expose the contact surface for multiple pins and external circuit electric connection.Wherein, plastic packaging layer includes cap body part and visor portion, and cap body part and visor portion constitute the plastic packaging layer of capful shape, and visor portion is to increase the contact surface for the multiple pins being located at the top of plastic packaging layer to the creepage distance of base plate bottom.
The package module and its manufacturing method of circuit for power conversion
The present invention relates to the package modules and its manufacturer of field of semiconductor package more particularly to a kind of circuit for power conversion Method.
High efficiency, high power density, high reliability and low cost are always electric power, electronic field to supply convertor It is required that.High efficiency means to reduce energy consumption, is conducive to energy-saving and emission-reduction, protects environment, and reduce use cost.High power density is then anticipated Taste it is small in size, light-weight, transportation cost and space requirement can be also reduced while reducing material cost, to reduce construction Cost.High reliability means longer service life and lower maintenance cost.
In order to cope with the development trend of power conversion module, the modularization of power device becomes the development trend of emphasis, For power module package itself also constantly using light, thin, short, small as prior development direction, this can undoubtedly bring heat dissipation and insulation The problem of distance etc..
In addition, generally, for using ceramic (Direct Bonding Copper, the DBC) substrate of direct copper or The package module of the circuit for power conversion of the plastic package structure of metallized ceramic substrate generallys use one mould of a cave when carrying out plastic packaging The structure of block, the plastic package die that just must more renew when module size changes in this way, and die cost is easily tens of thousands of to several Between 100000 dollars, therefore the production cost of the package module of circuit for power conversion is very high.In practical operation, in order to avoid The investment of excessive plastic package die often considers the versatility of mold in design, but produces again to design so various Limitation, so that optimized design becomes not realizing.
In view of this, the present invention provides one kind on the basis of satisfaction encapsulation is light, thin, have high-cooling property and height electrical The package module and its manufacturing method of the circuit for power conversion of safety.
Additional aspect and advantage of the invention will be set forth in part in the description, and partly will be from description It is apparent from, or can practice through the invention and acquistion.
One aspect of the present invention discloses a kind of package module of circuit for power conversion, comprising: substrate；Power device, it is described Power device is installed on the substrate；Plastic packaging layer covers the one side that the substrate has power device；And multiple pins, institute It states multiple pins and the power device is electrical connected and is embedded in the plastic packaging layer, the multiple pin is at least exposed for institute State the contact surface that multiple pins and an external circuit are electrically connected；Wherein, the plastic packaging layer includes cap body part and the brim of a hat Part, the cap body part and visor portion constitute the plastic packaging layer of capful shape, and the visor portion is to increase position The contact surface of the multiple pin at the top of the plastic packaging layer to the base plate bottom creepage distance.
In an embodiment, the substrate includes at least one layer of insulating layer and at least one layer of metal layer.
In another embodiment, the substrate includes: the first metal layer, the first ceramic layer.
In another embodiment, the substrate includes: the first metal layer, ceramic layer and second metal layer, the ceramic layer Between the first metal layer and the second metal layer.
In another embodiment, the first metal layer connects the power device and the multiple pin.
In another embodiment, the plastic packaging layer further includes first climbing electric convex block, and described first, which climbs electric convex block, is set to institute It states visor portion and the cap body part is adjacent and/or parallel.
In another embodiment, the cap body part of the plastic packaging layer is solid.
In another embodiment, the pin includes an at least L-type metal portion, and the L-type metal portion is by vertical portion and water Flat portion is constituted；The contact surface that the pin exposes to the open air is located at the horizontal part.
In another embodiment, the perpendicular face of the two of the horizontal part exposes the cap body portion of the plastic packaging layer Point.
In another embodiment, the thickness of the horizontal part of the pin is less than the thickness of its vertical portion.
In another embodiment, the part of the horizontal part and vertical portion intersection is formed with a groove structure.
In another embodiment, the height of the pin is less than or equal to the height of the cap body part of the plastic packaging layer Degree.
Another aspect of the present invention discloses the method for manufacturing the package module of above-mentioned circuit for power conversion, comprising: step a: One company's chip substrate is provided, several circuit for power conversion being arranged in array are provided on the substrate；Step b: described The pin of each circuit for power conversion is set on circuit for power conversion；Step c: it is formed and is integrally formed in the even chip substrate Plastic packaging layer cover several circuit for power conversion.
In an embodiment, further includes: step d: cutting even chip substrate and the plastic packaging layer isolate each function Rate conversion circuit.
In another embodiment, step d includes: step d1: the back side of precut even chip substrate is in substrate back shape At cutting trace；Step d2: cutting connects the plastic packaging layer that the another side of chip substrate opposite back side is formed；Step d3: divide completely From each circuit for power conversion.
In another embodiment, it is that the mechanicalness used breaks disconnected side that each circuit for power conversion is kept completely separate in step d3 Method.
In another embodiment, it is wide that the kerf width in step d2 in plastic packaging layer between cap body is greater than notch between the brim of a hat Degree.
In another embodiment, precuting in step d1 is that the cutting trace is formed by the way of radium-shine cutting.
In another embodiment, integrated moulding by casting in the even chip substrate is fastened on using injection mold in step c The plastic packaging layer.
In another embodiment, metalization layer is provided with at the injection mold fastening on the piece substrate.
Pin by being built in the encapsulation of circuit for power conversion by the package module of circuit for power conversion disclosed by the invention In module, and pass through the setting of the second top surface, increases pin to the creepage distance of base lower surface, further ensure function The package module of rate conversion circuit electrical safety in use；In addition, also reducing package dimension and thickness, effectively improve The power density of the package module of circuit for power conversion.The manufacturer of the package module of circuit for power conversion disclosed by the invention Method, by using the plastic packaging mode of formula in flakes, hence it is evident that the requirement to plastic package die is reduced, even if the encapsulation of circuit for power conversion The size of module changes, and need not also update plastic package die, have versatility, is the manufacture drop of the package module of circuit for power conversion Low production cost.
Its example embodiment is described in detail by referring to accompanying drawing, above and other feature of the invention and advantage will become It is more obvious.
Fig. 1 is the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention one.
Fig. 2 is the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention two.
Fig. 3 is the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention three.
Fig. 4 is the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention four.
Fig. 5 A and Fig. 5 B are the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention five.
Fig. 6 is the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention six.
Fig. 7 is the plastic-sealed body in the package module manufacturing method of the circuit for power conversion of the embodiment of the present invention after whole plastic packaging Top view.
Fig. 8 is the sectional view of the AA ' line along Fig. 7.
Fig. 9 A to Fig. 9 E is the flow diagram of the package module manufacturing method of the circuit for power conversion of the embodiment of the present invention.
Figure 10 is the substrate of whole plastic-sealed body in the package module manufacturing method of the circuit for power conversion of the embodiment of the present invention The cutting trace schematic diagram of lower surface.
Figure 11 is the schematic diagram of a variety of pin configurations of the package module of the circuit for power conversion of the embodiment of the present invention.
Figure 12 is showing using metalization layer in the package module manufacturing method of the circuit for power conversion of the embodiment of the present invention It is intended to.
Example embodiment is described more fully with reference to the drawings.However, example embodiment can be with a variety of shapes Formula is implemented, and is not understood as limited to embodiment set forth herein；On the contrary, thesing embodiments are provided so that the present invention will Fully and completely, and by the design of example embodiment comprehensively it is communicated to those skilled in the art.It is identical attached in figure Icon note indicates same or similar structure, thus will omit repetition thereof.
Described feature, structure can be incorporated in any suitable manner in one or more embodiments.Under In the description in face, many details are provided to provide and fully understand to embodiments of the present invention.However, this field skill Art personnel will be appreciated that it is one or more in no specific detail, or using other methods, constituent element, material etc., Technical solution of the present invention can also be practiced.In other cases, it is not shown in detail or describes known features, material or operation To avoid the fuzzy present invention.
Fig. 1 is the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention one.As shown in Figure 1, of the invention The package module 10 of the circuit for power conversion of embodiment one includes: substrate 100, at least one power device 110, at least one draws Foot 120 and plastic packaging layer 130.
Installation support plate of the substrate 100 as at least one power device 110, including at least one layer of insulating layer and at least one Layer metal layer.The substrate for example can for ceramic (DBC) substrate of mono-/bis-face direct copper, mono-/bis-face metallized ceramic substrate, Insulating metal substrate (IMS), organic single/multiple layer wiring board etc., high/low temperature co-fired ceramic substrate (HTCC/LTCC).
At least one power device 110, for example, can for MOSFET (Metal Oxide Semiconductor Field Effect Transistor), IGBT (insulated gate bipolar transistor) or diode etc. assemble with substrate 100, pass through bonding material (bonding Material) 150 (such as conducting resinl, solder, agglomerated material, Diffusion Welding materials etc.) realize with the electrical mechanical of substrate 100/ It is thermally connected；Electrode on power device 110 can be by bonding wire (bonding wire) 140 with wire bonding (wire Bonding) mode realizes electrical mechanical/thermal connection between substrate 100, pin 120 etc..In addition, power device 110 and base Plate 100 such as can also by packaged type flip-chip (flip chip) realize electrical mechanical/thermal connection, the present invention not with This is limited.
Substrate 100 can be for example ceramic (DBC) substrate of direct copper, as shown in Figure 1, including the first layers of copper 1000, pottery Enamel coating 1100 and the second layers of copper 1200.Wherein, circuit pattern is formed in the first layers of copper 1000, ceramic layer 1100 is located at first Between layers of copper 1000 and the second layers of copper 1200, at least one power device 110 is formed in the first layers of copper 1000.In the second layers of copper Power effectively can be converted electricity by the 1200 surface external radiator (not shown)s far from ceramic layer 1100, this kind of structure The heat transfer generated when the package module work on road takes away heat to 100 side of substrate, and by external radiator, this Outside, thermal grease layer can also be set between the second layers of copper 1200 and radiator, so that heat be made faster more directly to transfer out It goes.Certainly, in other examples, substrate 100 can also be printed circuit board (PCB), insulator-metal board (IMS) etc., gold Categoryization ceramic substrate, organic wiring board, high/low temperature co-fired ceramic substrate (HTCC/LTCC) etc., and insulating medium layer and metallization The number of plies can be single layer, two layers or even multilayer, and invention is not limited thereto.With substrate 100 shown in Fig. 1, first layer copper 1000 Ceramic layer 1100 is clamped between second layer copper 1200, the substrate of such symmetrical structure has intensity height, and dimensional stability is good Equal many merits, but will form the more of totally one termination electrode (the second layers of copper 1200) between first layer copper 1000 and second layer copper 1200 A distributed parasitic capacitor, at this time may the generations puzzlement such as efficiency, voltage stress, control sequential to circuit for power conversion. In order to improve these potential risks, the prioritization scheme that can be used has: the second layers of copper 1200 is carried out figure segmentation by 1., to eliminate Multiple capacitors have the bring adverse effect of the same end electrode.2. the second layers of copper 1200 is removed, that is, single layer circuit board is used, Parasitic capacitance is eliminated.
Plastic packaging layer 130 is in a manufacturing process by filling plastic packaging material (molding into mold (not shown) Compound it) is formed, to carry out integrally-built mechanical support and electic protection.Plastic packaging layer 130 be formed in substrate 100 it On, and cover the one side that substrate 100 has power device.In this embodiment, plastic packaging layer 130 includes cap body part 1310 With visor portion 1320, wherein cap body part 1310 and visor portion 1310 constitute the plastic packaging layer of capful shape.In addition, When substrate 100 is direct copper ceramic substrate, plastic packaging layer 130 will also cover the first layers of copper 1000 of substrate 100.
In the application, the package module 10 of circuit for power conversion (is not shown by the realization of pin 120 with an external circuit in figure Electrical connection between out).In order to make the package module 10 of circuit for power conversion at work, heat dissipation and it is electrically connected with external circuit It connects not in one plane, the contact surface (exposing the surface outside packaging body) of each pin 120 is arranged at plastic packaging layer 130 cap body part 1310.As shown in fig. 1, the contact surface a of pin 120 is located at the top of cap body part 1310, The creepage distance of such pin 120 to the lower surface (i.e. one side of the substrate 100 far from plastic packaging layer 130) of substrate 100 makes full use of The thickness of the package module of entire circuit for power conversion.
In addition, in order to simplify packaging technology, reduce production cost (specifically will be described herein-after), to pin 120 into When row design, so that pin 120 includes at least one L shape bending part, which has horizontal part and vertical portion, horizontal Portion and vertical portion are only that the angle for its relative position, between horizontal part and vertical portion is not limited to 90 degree.Wherein, in addition to For the contact surface of horizontal part outside the extraction at the top of cap body part 1310, horizontal part further includes a contact surface b from cap master It draws the side of body portion 1310.And the vertical portion of pin 120 is wholly embedded into plastic packaging layer 130.
In Fig. 1, illustrate by taking two pins as an example, two pins 120 are respectively arranged at the Encapsulation Moulds of circuit for power conversion The opposite two sides of block 10, respective contact surface b are located on the opposite side in cap body part 1,310 two.But this hair It is bright to be not limited, it in other embodiments can also include more than two pin, respective contact surface a and b exposes respectively In on the top surface and side of the cap body part 1310 of plastic packaging layer.
In order to further increase creepage distance, as shown in fig. 1, the visor portion 1320 of plastic packaging layer 130.As shown in figure 1 Shown, the outer surface S of visor portion 1320 is roughly parallel to the upper surface of substrate 100.Certainly, brim part in other embodiments Divide 1320 outer surface S shape can also have a certain degree between the upper surface of substrate 100.It should be noted that with substrate Shape be rectangle for, the brim of a hat of plastic packaging layer can only substrate the brim of a hat for having plastic packaging layer on one side, be also possible to the two of substrate While, three while or four sides be all corresponding with the visor portion 1320 of plastic packaging layer.In other embodiments, the shape of visor portion 1320 It can change with the shape of substrate, can also change with the range of device on the substrate that it to be wrapped up, it is not limited to The embodiment enumerated herein.
In some embodiments, plastic packaging layer 130 can not also include visor portion 1320, and only include cap body part 1310, so that the upper surface of substrate 100 is exposed by the part that visor portion 1320 covers in the above-described embodiments.
From figure 1 it appears that meeting the penetration range d that insulatet(i.e. cap of the vertical portion of pin 120 to plastic packaging layer 130 The distance at sub- 1310 edge of main part) under conditions of, pin 120 arrives the creepage distance d of 100 lower surface of substratec=h1+w+h2。 Wherein, h1For most short height of the horizontal part to the brim of a hat outer surface S of pin 120, h2For the brim of a hat outer surface S to 100 following table of substrate The height in face, w are the width of the brim of a hat.Therefore, creepage distance dcThe thickness of the package module of circuit for power conversion is utilized, and can Creepage distance d is adjusted with the width by adjusting the brim of a hatc, i.e., the visor portion 1320 of plastic packaging layer 130 is to increase pin To the creepage distance of base plate bottom.
In addition from the point of view of embodiment illustrated in fig. 1, in this embodiment, the cap body part 1310 of plastic packaging layer 130 is real The heart.This solid cap body part 1310 is conducive to other first devices on power device and substrate on protective substrate Part is effectively isolated device and surrounding enviroment on substrate.
Insulate penetration range dt, usually less than 0.4mm；When exhausted without reinforcing between 100 lower surface of pin 120 and substrate When edge requires, suitable d can also be set according to the resistance to pressure request of regulationtValue.
From the above, it is seen that the package module 10 of the circuit for power conversion of the embodiment of the present invention one is on the one hand, lead to It crosses and pin is built in the package module of circuit for power conversion, by the setting of the package module the brim of a hat, increase pin to base The creepage distance of plate lower surface ensure that the package module of circuit for power conversion electrical safety in use；On the one hand pass through Pin is drawn from the side far from base lower surface, the separation of electricity, heat is realized, is conducive to the package module of circuit for power conversion Heat dissipation at work；In addition, the design of the pin is additionally favorable for reducing package dimension and thickness, it is conducive to hoisting power conversion electricity The power density of the package module on road.
Fig. 2 is the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention two.As shown in Fig. 2, of the invention The difference of the package module 10 of the package module 20 and circuit for power conversion shown in FIG. 1 of the circuit for power conversion of embodiment two is only It is the design of pin 220.Compared to the pin 120 in Fig. 1, the width of the horizontal part of pin 220 is less than the vertical of pin 220 The width in portion.Such design increases h using the reduction of the horizontal width of pin 2201Creepage distance d can be increasedc；From this One side in the package module production of circuit for power conversion is said, when cutting pin 220, due to the drop of the width of its horizontal part It is low, conducive to the loss for reducing blade.On the other hand it says, due to the reduction of 220 horizontal part thickness of pin, enhances its flexibility, drop The low stress that it is generated on plastic package die in plastic packaging.
The package module of the circuit for power conversion of the package module 20 and embodiment one of the circuit for power conversion of embodiment two 10 identical contents, details are not described herein.
Fig. 3 is the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention three.As shown in figure 3, of the invention The difference of the package module 10 of the package module 30 and circuit for power conversion shown in FIG. 1 of the circuit for power conversion of embodiment three It is only that the design of pin 320.Compared to the pin 120 in Fig. 1, in the part that the horizontal part of pin 320 and vertical portion intersect Provided with a partial groove, on the one hand such design makes the processing of pin more easy, even if intersection corner position The control set is more accurate, to increase machining accuracy；On the other hand, the flexibility that can also increase pin reduces it in plastic packaging When the stress that is generated on plastic package die.
The otherwise content of package module 30 of the circuit for power conversion of embodiment three and the power of embodiment one are converted The package module 10 of circuit is essentially identical, therefore repeats no more.
Fig. 4 is the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention four.As shown in figure 4, of the invention The difference of the package module 10 of the package module 40 and circuit for power conversion shown in FIG. 1 of the circuit for power conversion of example IV exists In: plastic packaging layer 430 further includes that at least one climbs electric convex block 4300.Climb the outer surface of electric 4300 plastic packaging layer visor portion 4320 of convex block On S.Two kinds enumerated such as Fig. 4 climb the structure of electric convex block, and that enumerates on the right side of Fig. 4 climbs the cap of electric convex block 4300 and plastic packaging layer 430 Sub- main part 4310 is adjacent, so that the width for climbing electric convex block 4300 can further increase pin away from base lower surface (opposite base Plate be equipped with power device another side) creepage distance.That enumerates on the left of Fig. 4 climbs the cap of electric convex block 4300 and plastic packaging layer 430 Main part 4310 is parallel, and similarly under certain conditions, left side convex block can further increase pin away from base lower surface Creepage distance.But it is only to illustrate to be used that this two kinds, which are climbed electric convex block, is not intended to limit the present invention.It is any to further increase pin 120 arrive the creepage distance d of 100 lower surface of substratecElectric convex block of climbing all should belong within protection scope of the present invention.
It should be noted that when the package module of circuit for power conversion include it is multiple climb electric convex block 4300 when, it is multiple to climb Electric convex block 4300 may be the same or different.By taking two pins 120 in Fig. 4 as an example, climbing electric convex block 4300 for two can be equal To climb electric convex block shown in the left side Fig. 4, can also be on the right of Fig. 4 shown in climb electric convex block, or can also be as shown in Figure 4 Different electric convex block is climbed using two.In addition it is also possible to only climb electric convex block including the left side Fig. 4, or only climbing including the right Electric convex block, can also be by multiple outer surface S for climbing the brim of a hat that electric convex block is set to the same side, and invention is not limited thereto.
The package module of the circuit for power conversion of the package module 40 and embodiment one of the circuit for power conversion of example IV 10 identical contents, details are not described herein.
Fig. 5 A and Fig. 5 B are the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention five.Such as Fig. 5 A and figure Shown in 5B, the power of the package module 50 of the circuit for power conversion of the embodiment of the present invention five and embodiment one shown in FIG. 1 is converted The difference of the package module 10 of circuit is: the package module 50 of circuit for power conversion further includes at least one control/driving member Part 510.At least one control/driving element 510 can be for example driving chip, control chip and respectively required peripheral circuit Element such as resistance, capacitor, inductance, diode and triode etc., invention is not limited thereto.
At least one control/driving circuit element 510, can by being directly electrically connected at least one power device 110, It can also be electrically connected with substrate 100, above-mentioned electric connection mode can for example be electrically connected for wire bonding, using flexible circuit board Or copper sheet electrical connection etc., invention is not limited thereto.
In Fig. 5 A, at least one control/driving circuit element 510 is arranged on substrate 100, and by lead and at least One power device 110 is electrically connected.Further, it is also possible to as shown in Figure 5 B, at least one circuit board 520, the circuit board be arranged 520 are arranged in parallel with substrate 100, are embedded in plastic packaging layer 130.At least one control/driving circuit element 510 is arranged at circuit On plate 520, and it is electrically connected by lead at least one power device 110.
Further, it is also possible at least one power device 110 is placed on the circuit board, to utilize the envelope of circuit for power conversion Die-filling piece 50 of inner space.
The circuit for power conversion of other aspects and embodiment one of the package module 50 of the circuit for power conversion of embodiment five Package module 10 content it is essentially identical, therefore repeat no more.
Fig. 6 is the sectional view of the package module of the circuit for power conversion of the embodiment of the present invention six.As shown in fig. 6, of the invention The difference of the package module 10 of the circuit for power conversion of the package module 70 and embodiment one of the circuit for power conversion of embodiment six Be: the substrate 700 of the package module 70 of circuit for power conversion uses metallized ceramic substrate, and at least one power device One or more of part 110 is placed on pin 720.Metallized ceramic substrate 700 includes: the first metalization layer 7000, pottery Enamel coating 7100 and the second metalization layer 7200.
The reason of designing in this way is, due to having used metallized ceramic substrate, although it is high and integrated with wiring density High advantage is spent, but since the thickness of metalization layer thereon is relatively thin, current-carrying capability and heat diffusion capabilities have one Fixed limitation.Therefore, power device 110 is placed on pin 720, preferable heat/electrical property can be obtained.In addition, according to Whether pin 720 needs to have the case where electrical connection between the first metalization layer 7000 of substrate 700, and pin 720 can lead to It crosses conductive material to be bonded in the first metalization layer 7000 of substrate 700, can also be pasted by nonconducting Heat Conduction Material Metallized area or unmetallized area on substrate 700.
In addition, another method for increasing metallized ceramic substrate current-carrying capability is increased by way of repeatedly printing The thickness of metalization layer.And when being integrated with control/driving element on metallized ceramic substrate, due to its control line line-spacing compared with Width to the of less demanding of current-carrying capability, therefore can only print a metalization layer in integrated control/driving element position, And print thickness can be controlled relatively thin.When hereafter, if necessary to integrated power device again, then can repeatedly it be printed again Brush, to increase the thickness of metalization layer.
Another aspect of the present invention additionally provides the manufacturing method of the package module of above-mentioned circuit for power conversion, with further Reduce the production cost of the package module of circuit for power conversion.The package module for the circuit for power conversion that manufacturing method provides herein Manufacturing method embodiment in, using the production method of formula in flakes, be respectively set on one whole substrate, be electrically connected power device It is whole to carry out plastic packaging after part and pin, the entirety plastic-sealed body is cut again later, to form final multiple power conversion The package module of circuit.
Fig. 7 is the plastic-sealed body in the package module manufacturing method of the circuit for power conversion of the embodiment of the present invention after whole plastic packaging Top view.Fig. 8 is the sectional view of the AA ' line along Fig. 7.As shown in Figure 7 and Figure 8, whole plastic packaging is carried out to want plastic package die It asks and is substantially reduced, even if the size of the package module of circuit for power conversion changes, need not also update plastic package die, and have general Property, the manufacture for the package module of circuit for power conversion reduces production cost.
In Fig. 8 still by taking direct copper ceramic substrate as an example, wherein the knot inside the package module of each circuit for power conversion Structure and the structure in Fig. 1 are essentially identical, and details are not described herein.
As can be seen from Figure 8, dotted line is the cutting line between the package module of circuit for power conversion, i.e., along the dotted line After being cut, the plastic-sealed body of the entirety is cut into the package module of multiple circuit for power conversion.In order to simplify manufacturing process, The pin of the package module of two neighboring circuit for power conversion uses integral structure, to after dicing, convert electricity in power It will appear the lead surface b in Fig. 1 on the side surface of the package module on road, but invention is not limited thereto.
Equally, also illustrate by taking two pins as an example in Fig. 8, two pins are respectively arranged at the envelope of each circuit for power conversion Die-filling piece of opposite two sides.But invention is not limited thereto, such as can also only include a pin, and contact surface is exposed to power The top surface and side of the cap body part of the package module of conversion circuit；Or can also include more than two pin, it is each From lead surface be respectively exposed to circuit for power conversion package module cap body part top surface and side.
Fig. 9 A to Fig. 9 B is the flow diagram of the package module manufacturing method of the circuit for power conversion of the embodiment of the present invention. This method comprises:
Step a: as shown in Figure 9 A, the substrate 1 of a formula in flakes is provided, by taking direct copper ceramic substrate as an example comprising: First layers of copper 11, ceramic layer 12 and third layers of copper 13.
Step b: as shown in Figure 9 B, being arranged power device 2 and pin 3, and makes electric between power device 2, pin 3 and substrate Connection, for example, by bonding material 6 (such as conducting resinl, solder, agglomerated material, Diffusion Welding material) realize with the electricity of substrate 1/ Mechanical/thermal connection；Electrical mechanical/thermal connection with substrate 1, this hair can also be realized in a manner of wire bonding by bonding wire 5 It is bright to be not limited.
Step c: it as shown in Figure 9 C, to substrate 1, power device 2 and the whole progress plastic packaging of pin 3, is formed integrally formed Plastic packaging layer 4, covering substrate 1, power device 2 and pin 3；Also, the contact surface of each pin 3 is exposed to whole plastic packaging layer 4 Cap body part top surface.In some embodiments, it is fastened in even chip substrate 1 for example, by using injection mold and integrally pours Injection forming plastic packaging layer 4.Wherein on piece substrate 1 be provided with metalization layer at injection mold fastening.It should be noted that in reality In the production of border, due to the influence of molding pressure, part plastic packaging material may be spilled over on pin upper surface, at this time can be with A flat surface is realized by the plastic packaging material that post-processing (such as sandblasting, grinding technique) removes spilling.In some cases, in order to So that same mold is compatible with different module thickness, can according to Product Definition mold thickness most thick in product line, For relatively thin module, a lower height of pin can be used, after plastic packaging, pin is exposed by way of grinding.Step d: As shown in fig. 9d, whole 3 to one predetermined position of plastic packaging layer 4 and pin is cut, to form the envelope of each circuit for power conversion The cap body part of die-filling piece of plastic packaging layer 4 '.Wherein, the kerf width in plastic packaging layer between cap body is greater than between the brim of a hat and cuts Mouth width degree.
It the predetermined position can as shown in figure 9d, for the tens of positions between hundreds of microns in upper surface apart from substrate It sets, which can be depending on the thickness of the brim of a hat of plastic packaging layer.
In some embodiments, which may be the upper surface of substrate 1.
Step e: as shown in fig. 9e, separate substrate 1 and plastic packaging layer 4 ' each other, such as dotted line continues to cut along figure It cuts, to form the package module of multiple independent circuit for power conversion.
For direct copper ceramic substrate or metallized ceramic substrate, because intermediate ceramic layer is very rigid, using knife It is relatively difficult when piece is cut, the increase in working hour can be caused, and serious to the loss of blade, increase the cost of production.Cause This can also be to upper when having the substrate of stiff materials using such as direct copper ceramic substrate or metallized ceramic substrate Step a and step e in the manufacturing method stated further are optimized.
Step a ': providing the substrate 1 an of formula in flakes, and as shown in Figure 10, (i.e. after plastic packaging remote in the lower surface of substrate 1 The one side of top surface from plastic-sealed body) cutting trace g is formed by the way of precut along dotted line, thickness and width can be ten To hundreds of microns.Such as it insulating layer can cut to be formed by radium-shine mode after being sintered in a substrate, or even can also be in substrate 1 Circuit pattern formed after cut to be formed by radium-shine mode.However, in other embodiments, when can also make ceramic green It is formed by way of extruding/cutting.The generation type of cutting trace of the invention is not limited with the content that this illustrates.Step E ': it is kept completely separate each circuit for power conversion.Such as: by directly bending (bending), i.e., mechanicalness breaks disconnected mode, makes Substrate 1 and plastic packaging layer 4 ' separate each other, to form the package module of multiple independent circuit for power conversion.
In some embodiments, it can also be precut after step d, then in the lower surface of substrate 1, form cutting Trace separates substrate 1 and plastic packaging layer 4 ' each other, to form multiple independent function later again by way of directly bending The package module of rate conversion circuit.
In some embodiments, it when using double-sided substrate, sets out for the considerations of increasing substrate strength, back can be retained The complete copper of surface layer carries out graphic definition after plastic packaging, then to the layers of copper at the back side, then in the pre-cut for carrying out 1 lower surface of substrate It cuts.
It should be noted that above method step is merely illustrative, and it is not intended to limit the invention the execution of method Sequentially.In enforceable situation, the method for the present invention step can be carried out with random order.
In whole package body structure as shown in Figure 8, other than pin configuration disclosed above, Figure 11 has also listed it His several pin configurations.It can be seen from fig. 11 that the common ground of these types of pin configuration includes: to have contact surface and substrate to connect Junction, the substrate joint face and substrate of pin realize electrical connection, and contact surface is exposed to the top of the cap body part of plastic packaging layer Face or/and side, with an external external circuit.The cutting line in dotted line corresponding diagram 8 in figure, for separating each power conversion The package module of circuit.It is emphasized that all lines are all expressed as straight line in pin configuration cited by Figure 11, Dog-ear is illustrated as being mutually perpendicular to, but due to processing procedure or considers that reducing pin vertical direction rigidity angularly goes out in practice Hair, lines can be curve, and dog-ear is also not limited to 90 degree.
Further, since plastic package process needs a closed cavity, to guarantee the molding of plastic packaging material.In power of the invention In the package module manufacturing method of conversion circuit, by the way of formula plastic packaging in flakes, occur in order to prevent in the lower surface of module The phenomenon that excessive glue, can design one be greater than piece substrate size cavity body of mould, by this in flakes it is completely set up in this cavity, Some pressure units are set in mold simultaneously, so that a surface of substrate and mold is preferably bonded.
In some cases, in order to enable mold is adaptable to the substrate of different-thickness, cavity body of mould can be designed Less than the mold of base plate connection sheet, mold pushes down the position of substrate front side (one side with power device) surrounding, to form an envelope Closed chamber body, while guaranteeing that good fitting is realized in the bottom surface of substrate and mold, it effectively prevent excessive glue.When using using ceramics as base When the substrate of body, since material is more crisp, it is easy to happen breakage in mold pressing, therefore can need on substrate by mold The position of fastening and neighbouring position arrange the metalization layer as shown in black box in Figure 12, such as layers of copper, are increased with playing The purpose of substrate strength.
The package module manufacturing method of circuit for power conversion disclosed by the invention, it is this using the plastic packaging mode of formula in flakes Requirement of the mode of whole plastic packaging to plastic package die is substantially reduced, even if the size of the package module of circuit for power conversion changes, Also plastic package die need not be updated, and there is versatility, the manufacture for the package module of circuit for power conversion reduces production cost.
It is particularly shown and described exemplary embodiments of the present invention above.It should be understood that the present invention is not limited to institute Disclosed embodiment, on the contrary, it is intended to cover comprising various modifications within the scope of the appended claims and equivalent set It changes.
1. a kind of package module of circuit for power conversion characterized by comprising
Power device, the power device are installed on the substrate；
Plastic packaging layer covers the one side that the substrate has power device；And
Multiple pins, the multiple pin and the power device are electrical connected and are embedded in the plastic packaging layer, the multiple pin At least expose the contact surface for the multiple pin and external circuit electric connection；
Wherein, the plastic packaging layer includes cap body part and visor portion, and the cap body part and visor portion are constituted The plastic packaging layer of capful shape, contact of the visor portion to increase the multiple pin being located at the top of the plastic packaging layer Face to the base plate bottom creepage distance.
2. the package module of circuit for power conversion according to claim 1, wherein the substrate includes at least one layer of insulation Layer and at least one layer of metal layer.
3. the package module of circuit for power conversion according to claim 2, wherein the substrate include: the first metal layer, Ceramic layer.
4. the package module of circuit for power conversion according to claim 1, wherein the substrate include: the first metal layer, Ceramic layer and second metal layer, the ceramic layer is between the first metal layer and the second metal layer.
5. the package module of circuit for power conversion according to claim 3 or 4, wherein described in the first metal layer connection Power device and the multiple pin.
6. the package module of circuit for power conversion according to claim 1, wherein the plastic packaging layer further includes first climbing electricity Convex block, described first climbs that electric convex block is set to the visor portion and the cap body part is adjacent and/or parallel.
7. the package module of circuit for power conversion according to claim 1, wherein the cap body part of the plastic packaging layer For solid.
8. the package module of circuit for power conversion according to claim 1, wherein the pin includes an at least L-type metal Portion, the L-type metal portion are made of vertical part and the horizontal part；The contact surface that the pin exposes to the open air is located at the horizontal part.
9. the package module of circuit for power conversion according to claim 8, wherein two perpendicular faces of the horizontal part Expose the cap body part of the plastic packaging layer.
10. the package module of circuit for power conversion according to claim 8, wherein the width of the horizontal part of the pin is small Width in its vertical portion.
11. the package module of circuit for power conversion according to claim 8, wherein what the horizontal part and vertical portion were intersected Part is formed with a groove structure.
12. the package module of circuit for power conversion according to claim 1, wherein the height of the pin is less than or equal to The height of the cap body part of the plastic packaging layer.
13. a kind of method of the package module of circuit for power conversion described in manufacturing claims 1, comprising:
Step a: company's chip substrate is provided, is provided with several circuit for power conversion being arranged in array on the substrate；
Step b: the pin of each circuit for power conversion is set on the circuit for power conversion；
Step c: integrally formed plastic packaging layer is formed in the even chip substrate and covers several circuit for power conversion.
14. the method for the package module of circuit for power conversion according to claim 13, further includes:
Step d: cutting even chip substrate and the plastic packaging layer isolate each circuit for power conversion.
15. the method for the package module of circuit for power conversion according to claim 14, wherein step d includes:
Step d1: the back side of precut even chip substrate is to form cutting trace in substrate back；
Step d2: cutting connects the plastic packaging layer that the another side of chip substrate opposite back side is formed；
Step d3: it is kept completely separate each circuit for power conversion.
16. the method for the package module of circuit for power conversion according to claim 15 is wherein kept completely separate in step d3 Each circuit for power conversion is that the mechanicalness used breaks disconnected method.
17. the method for the package module of circuit for power conversion according to claim 15, wherein in step d2 in plastic packaging layer Kerf width between cap body is greater than kerf width between the brim of a hat.
18. the method for the package module of circuit for power conversion according to claim 15, wherein precuting in step d1 is The cutting trace is formed by the way of radium-shine cutting.
19. the method for the package module of circuit for power conversion according to claim 13 wherein uses injection mould in step c Tool is fastened on plastic packaging layer described in integrated moulding by casting in the even chip substrate.
20. the method for the package module of circuit for power conversion according to claim 19, wherein on the formula substrate in flakes Metalization layer is provided with at the injection mold fastening.
CN201510088406.4A 2015-02-26 2015-02-26 The package module and its manufacturing method of circuit for power conversion CN105990266B (en)
CN201510088406.4A CN105990266B (en) 2015-02-26 2015-02-26 The package module and its manufacturing method of circuit for power conversion
TW104121422A TWI594381B (en) 2015-02-26 2015-07-01 Encapsulation module of power conversion circuit and manufacturing method thereof
US15/051,852 US9679786B2 (en) 2015-02-26 2016-02-24 Packaging module of power converting circuit and method for manufacturing the same
CN105990266A CN105990266A (en) 2016-10-05
CN105990266B true CN105990266B (en) 2018-12-07
ID=56799097
US (1) US9679786B2 (en)
CN (1) CN105990266B (en)
TW (1) TWI594381B (en)
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