阅读说明：本技术 一种多芯片嵌入式异构封装结构及其制造方法 (multi-chip embedded heterogeneous packaging structure and manufacturing method thereof ) 是由 崔成强 雷珍南 林挺宇 华显刚 蔡琨辰 于 2019-08-07 设计创作，主要内容包括：本发明公开一种多芯片嵌入式异构封装结构及其制造方法,提供一种双面同时塑封的多芯片异构嵌入式封装方法多芯片嵌入式异构封装,可在提高封装效率的同时,尽可能的降低单面塑封所带来的翘曲问题,保证后续工艺的可实施性,及减少封装成本。同时通过对治具及载板的独特设计,让治具在支撑载板的同时,更易于载板的放置操作与取下的操作。(the invention discloses a multi-chip embedded heterogeneous packaging structure and a manufacturing method thereof, and provides a multi-chip embedded heterogeneous packaging method for simultaneously plastic packaging on two sides, which can improve the packaging efficiency, reduce the warping problem caused by single-side plastic packaging as much as possible, ensure the feasibility of subsequent processes and reduce the packaging cost. Meanwhile, through the unique design of the jig and the carrier plate, the jig is easier to place and take down the carrier plate while supporting the carrier plate.)

1. a multi-chip embedded heterogeneous package structure, comprising:

the packaging device comprises a to-be-packaged part and a plurality of packaging units, wherein the to-be-packaged part comprises a carrier plate and a plurality of chips to be packaged, films are respectively pasted on the upper surface and the lower surface of the carrier plate, and the chips are pasted on the films;

the structure of the film of the chip on the upper surface of the carrier plate and the structure of the film on the lower surface of the carrier plate are symmetrical structures;

the packaging device comprises a material groove, a packaging box and a packaging box, wherein the material groove is provided with an upper groove and a lower groove, one side of the lower groove is provided with at least one jig, and the to-be-packaged part is arranged on the jig;

An upper die is arranged above the to-be-packaged part, the upper die is provided with the upper groove, and a plastic package material is arranged between the upper die and the to-be-packaged part; treat that the packaging part below is equipped with the bed die, the bed die is equipped with the lower groove, the bed die with treat and be equipped with the plastic envelope material between the packaging part.

2. the multi-chip embedded heterogeneous package structure of claim 1, wherein: the jig and the to-be-packaged piece are vertically placed, a notch is formed in the upper portion of the jig, and the to-be-packaged piece is arranged in the notch.

3. The multi-chip embedded heterogeneous package structure of claim 1, wherein: the side surface of the carrier plate is provided with at least one groove.

4. The multi-chip embedded heterogeneous package structure of claim 1, wherein: the film is a blue film, and the blue film is adhered to the surface of the carrier plate.

5. The multi-chip embedded heterogeneous package structure of claim 1, wherein: the jig and the lower die are in a sealed state.

6. A manufacturing method of a multi-chip embedded heterogeneous packaging structure is characterized by comprising the following steps:

(1) Attaching films to the upper surface and the lower surface of a carrier plate, and respectively attaching chips to be packaged to the upper surface and the lower surface of the carrier plate to which the films are attached to form a to-be-packaged part;

(2) Uniformly placing a plastic package material on the upper surface of a lower die, and then arranging a to-be-packaged piece in a material groove, wherein an upper groove and a lower groove are arranged in the material groove, the lower groove is arranged in the lower die, at least one jig is arranged on one side of the lower groove, and the to-be-packaged piece is placed on the jig and arranged above the lower die;

(3) Uniformly placing plastic packaging materials on the upper surface of the to-be-packaged part, wherein the plastic packaging materials are positioned in the upper groove, and the upper groove is arranged above the to-be-packaged part and positioned in the upper die;

(4) The upper die is lowered to the upper surface of the to-be-packaged piece;

(5) respectively pressurizing the surfaces of the upper die and the lower die, so that the upper die and the lower die move towards the vertical direction of the to-be-packaged part;

(6) the side wall of the carrier plate is provided with at least one groove, the upper die is moved away, uniform upward force is applied under the lower die, downward force is applied at the position of the groove, and the packaged part to be packaged is taken down above the jig;

(7) And simultaneously removing the keys of the two sides of the packaged part to be packaged in a plastic package in a mechanical and thermal removing mode.

7. The method of manufacturing a multi-chip embedded heterogeneous package structure of claim 6, wherein: the jig and the lower die are in a sealed state.

8. The method of manufacturing a multi-chip embedded heterogeneous package structure of claim 6, wherein: the lower mold is movable and sealed relative to the sidewall of the mold.

9. The method of manufacturing a multi-chip embedded heterogeneous package structure of claim 6, wherein: the upper die is a lifting die.

10. The method of manufacturing a multi-chip embedded heterogeneous package structure of claim 6, wherein: the plastic package material is granular or powdery.

Technical Field

the invention relates to the field of advanced electronic packaging, relates to an embedded packaging process and structure, and particularly relates to an embedded packaging structure of multiple chips and a manufacturing method thereof.

Background

in the process of the plastic packaging process in the field of advanced electronic packaging, no matter a wafer level or a large board level is warped after plastic packaging, the larger the area is, the larger the warping amount generated by the plastic packaging is, the larger the influence on the subsequent packaging process is, and even when the warping exceeds a certain degree, the subsequent process cannot be performed. Reducing the amount of warpage generated by plastic packaging is a critical problem which needs to be solved urgently at present, and many manufacturers seek solutions at present.

The invention patent CN 109003948A discloses a double-sided three-dimensional stacked package structure and a package method, wherein at least one layer of chip is respectively attached to two sides of a substrate, the chip and the substrate are electrically interconnected through a lead wire, and the substrate and the chip are packaged by using a plastic package material after balls are implanted on the two sides of the substrate, so as to solve the problem of component warpage and three-dimensional integration caused by single-sided thermal expansion mismatch. The plastic package structure is a structure of bonding the chip and the substrate through a lead, and is not used for directly carrying out double-sided plastic package on the chip.

The invention patent CN 109003906 a discloses a method for manufacturing double-sided plastic package of a substrate, which realizes plastic package of double sides of the substrate at one time by controlling the length of the upper and lower module telescopic bumps. The plastic package method adopts injection molding package, the flowability of injection molding plastic package material is poorer than that of compression molding, the plastic package quality is affected, and the plastic package structure is a structure of bonding a chip and a substrate through a lead.

the invention patent CN 107195625 a provides a double-sided plastic package fan-out type system-level stacked package structure and a manufacturing method thereof, wherein a chip and a passive element are respectively bonded on two sides of a rewiring layer, and the side with the chip and the side with the passive element are respectively plastic-packaged, so that the overall efficiency of the package structure is improved, and a stacked structure with a small volume is provided. 1. The method improves the overall efficiency of the packaging structure to a certain extent, but the efficiency is still much lower than that of one-time two-sided plastic packaging because the plastic packaging is carried out twice, and for large-size board-level fan-out type packaging, the problem which is not negligible is warping, the plastic packaging of one side alone is easy to cause the warping of a large board, and the product yield is not favorable.

The invention patent CN 104241158B provides a packaging method of a board-level fan-out structure, wherein double-layer copper foils are respectively adhered on the upper surface and the lower surface of a core board, the active surface of a chip faces outwards and is adhered on the double-layer copper foils through heat-conducting glue, then a dielectric layer is pressed on the outer side of the chip, and RDL and other processes are carried out. The active surface of the chip of the structure faces inwards, EMC plastic package materials are subjected to hot-press plastic package, keys are removed through plastic package, and then two Face-up plastic package structures are obtained.

However, most of the existing packaging structures are single-sided packaging, or double-sided plastic packaging with one side being plastic packaged first and the other side being plastic packaged second, so that the packaging efficiency is low, the warpage is easy to occur, and the warpage problem is obvious.

Disclosure of Invention

The invention aims to solve the problems in the prior art, provides a multi-chip embedded heterogeneous packaging structure and a manufacturing method thereof, and provides a multi-chip embedded heterogeneous packaging method with simultaneous plastic package on two sides, which can improve the packaging efficiency, reduce the warping problem caused by single-side plastic package as much as possible, ensure the feasibility of the subsequent process and reduce the packaging cost. Meanwhile, through the unique design of the jig and the carrier plate, the jig is easier to place and take down the carrier plate while supporting the carrier plate.

The technical scheme adopted by the invention is as follows:

in one aspect, a multi-chip embedded heterogeneous package structure includes: the packaging device comprises a to-be-packaged part and a plurality of packaging units, wherein the to-be-packaged part comprises a carrier plate and a plurality of chips to be packaged, films are respectively pasted on the upper surface and the lower surface of the carrier plate, and the chips are pasted on the films; the structure of the film of the chip on the upper surface of the carrier plate and the structure of the film on the lower surface of the carrier plate are symmetrical structures; the packaging device comprises a material groove, a packaging box and a packaging box, wherein the material groove is provided with an upper groove and a lower groove, one side of the lower groove is provided with at least one jig, and the to-be-packaged part is arranged on the jig; an upper die is arranged above the to-be-packaged part, the upper groove is formed in the upper die, and a plastic package material is arranged between the upper die and the to-be-packaged part; and a lower die is arranged below the packaging part, the lower die is internally provided with the lower groove, and a plastic packaging material is arranged between the lower die and the packaging part.

Further, the jig and the to-be-packaged piece are vertically placed, a notch is formed in the upper portion of the jig, and the to-be-packaged piece is arranged in the notch.

furthermore, the side surface of the carrier plate is provided with at least one groove.

Further, the film is a blue film, and the blue film is adhered to the surface of the carrier plate.

Further, the jig and the lower die are in a sealed state.

On the other hand, the manufacturing method of the multi-chip embedded heterogeneous packaging structure comprises the following steps:

(1) attaching films to the upper surface and the lower surface of a carrier plate, and respectively attaching chips to be packaged to the upper surface and the lower surface of the carrier plate to which the films are attached to form a to-be-packaged part;

(2) Uniformly placing a plastic package material on the upper surface of a lower die, and then arranging a to-be-packaged piece in a material groove, wherein an upper groove and a lower groove are arranged in the material groove, the lower groove is arranged in the lower die, a jig is arranged in the lower groove, and the to-be-packaged piece is placed on the jig and is arranged above the lower die;

(3) Uniformly placing plastic packaging materials on the upper surface of the to-be-packaged part, wherein the plastic packaging materials are positioned in the upper groove, and the upper groove is arranged above the to-be-packaged part and positioned in the upper die;

(4) The upper die is lowered to the upper surface of the to-be-packaged piece;

(5) Respectively pressurizing the surfaces of the upper die and the lower die, so that the upper die and the lower die move towards the vertical direction of the to-be-packaged part;

(6) The side wall of the carrier plate is provided with at least one groove, the upper die is moved away, uniform upward force is applied under the lower die, downward force is applied at the position of the groove, and the packaged part to be packaged is taken down above the jig;

(7) And simultaneously removing the keys of the two sides of the packaged part to be packaged in a plastic package in a mechanical and thermal removing mode.

Further, the jig and the lower die are in a sealed state.

further, the lower mold is movable and sealed with respect to the sidewall of the mold.

further, the upper die is a lifting die.

Further, the molding compound is granular or powdery.

The invention has the beneficial effects that:

According to the multi-chip embedded heterogeneous packaging structure, the multi-chip embedded heterogeneous packaging with simultaneous plastic packaging on two sides is realized through the specially-made jig, the carrier plate and the mold design, so that the warpage caused by single-side plastic packaging is reduced, and the packaging efficiency is improved.

Preferred embodiments of the present invention and advantageous effects thereof will be described in further detail with reference to specific embodiments.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings, there is shown in the drawings,

FIG. 1: the invention discloses a structural schematic diagram of a cross-sectional surface of a to-be-packaged piece of a multi-chip embedded heterogeneous packaging structure;

FIG. 2: the invention discloses a structural schematic diagram of a cross-sectional view surface of a to-be-packaged piece of a multi-chip embedded heterogeneous packaging structure, which is placed in a lower groove;

FIG. 3: the invention discloses a structural schematic diagram of a cross-sectional surface of a multi-chip embedded heterogeneous packaging structure, wherein a plastic packaging material is placed on the upper surface of a to-be-packaged part;

FIG. 4: the invention discloses a structural schematic diagram of a cross-section surface of a to-be-packaged piece of an upper mould of a multi-chip embedded heterogeneous packaging structure;

FIG. 5: the invention discloses a structural schematic diagram of a cross-sectional view of an upper die and a lower die of a multi-chip embedded heterogeneous packaging structure for pressurizing a to-be-packaged piece;

FIG. 6: the invention discloses a structural schematic diagram of a section surface taken down from an upper mould of a multi-chip embedded heterogeneous packaging structure;

FIG. 7: the invention discloses a structural schematic diagram of a section surface of a to-be-packaged piece of a multi-chip embedded heterogeneous packaging structure for detaching a key;

FIG. 8: the invention relates to a design drawing of a carrier plate of a multi-chip embedded heterogeneous packaging structure.

Names and designations of parts

1. Packaging the part to be packaged; 11. a carrier plate; 111. a groove; 12. a film; 13. a chip; 2. a trough; 21. an upper groove; 22. a lower groove; 3. plastic packaging material; 4. a jig; 41. a notch; 5. an upper die; 6. a lower die; 7. and (4) temporary bonding glue.

Detailed Description

the following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

as shown in fig. 1 to 8, an embodiment of the present invention discloses a multi-chip embedded heterogeneous package structure, including: treat the packaging part 1, treat that the packaging part 1 includes support plate 11 and a plurality of chip 13 of treating the encapsulation, support plate 11 upper surface and lower surface paste film 12 respectively, chip 13 paste in on film 12, chip 13 is the face towards support plate 11 avoids chip 13 to receive the damage when the pressurization plastic envelope. The material of the carrier 11 may be glass, SUS, Prepreg (BT), FR4, FR5, p.p, EMC, PI, etc. The chips 13 include packages of chips with the same function or packages of chips with multiple functions, the sizes of the chips 13 may be different, and the thicknesses of the chips 13 may also be different. The structure of the film 12 of the chip 13 on the upper surface of the carrier 11 and the structure of the film 12 on the lower surface of the carrier 11 are symmetrical structures and are symmetrically arranged.

the packaging device comprises a material groove 2, wherein the material groove 2 is provided with an upper groove 21 and a lower groove 22, one side of the lower groove 22 is provided with at least one jig 4, and the packaging part 1 is arranged on the jig 4.

treat that packaging part 1 top is equipped with upper die 5, be equipped with in the upper die 5 go up groove 21, go up die 5 with treat that it is equipped with plastic envelope material 3 between packaging part 1. The upper die 5 is a lifting die capable of lifting up and down.

A lower die 6 is arranged below the package part 1, the lower groove 22 is arranged in the lower die 6, a plastic package material 3 is arranged between the lower die 6 and the package part 1, and the plastic package material 3 can be particles, powder or liquid. The package 1 to be packaged is reversely buckled above the lower die 6, the edge of the carrier plate 11 is located on the jig 4 at a certain distance, the jig 4 and the lower die 6 are in a sealed state, and the lower die 6 can move and is sealed relative to the side wall of the die.

the structure can realize the embedded packaging of the multi-chip 13 with double surfaces packaged by plastic at the same time, thereby saving the cost.

The jig 4 is perpendicular to the to-be-packaged component 1, a notch 41 is formed in the upper portion of the jig 4, the to-be-packaged component 1 is arranged in the notch 41, and the to-be-packaged component 1 is conveniently taken and placed on the jig 4.

As shown in fig. 8, at least one groove 111 is formed on a side surface of the carrier 11, and the structure of the groove 111 may be symmetrical or asymmetrical. The groove 111 is convenient for disassembling the packaged part 1 from the upper die 5 and the lower die 6 without damaging the packaged part 1.

The film 12 is a blue film, and the blue film is adhered to the surface of the carrier plate 11 through a temporary bonding adhesive 7.

on the other hand, the manufacturing method of the multi-chip 13 embedded packaging structure comprises the following steps:

(1) attaching films 12 to the upper surface and the lower surface of a carrier 11, and attaching chips 13 to be packaged to the upper surface and the lower surface of the carrier 11 to which the films 12 are attached, respectively, to form a package 1, as shown in fig. 1.

(2) The method comprises the steps of uniformly placing plastic package materials 3 on the upper surface of a lower die 6, then arranging package parts 1 in a trough 2, wherein an upper trough 21 and a lower trough 22 are arranged in the trough 2, the lower die 6 is provided with the lower trough 22, a jig 4 is arranged in the lower trough 22, and the package parts 1 are placed on the jig 4 and arranged above the lower die 6, as shown in fig. 2.

(3) And plastic packaging materials 3 are uniformly placed on the upper surface of the to-be-packaged component 1, the plastic packaging materials 3 are positioned in the upper groove 21, and the upper groove 21 is arranged above the to-be-packaged component 1 and positioned in the upper die 5, as shown in fig. 3.

(4) The upper mold 5 is lowered to the upper surface of the package 1 to be packaged as shown in fig. 4.

(5) Pressing the surfaces of the upper mold 5 and the lower mold 6 respectively causes the upper mold 5 and the lower mold 6 to move in the vertical direction of the package to be packaged 1, as shown in fig. 5.

(6) The side wall of the carrier 11 is provided with at least one groove 111, the upper mold 5 is moved away, a uniform upward force is applied under the lower mold 6, a downward force is applied at the position of the groove 111, and the to-be-packaged component 1 which is subjected to plastic packaging is taken down above the jig 4, as shown in fig. 6 and 8.

(7) And simultaneously removing the keys of the two sides of the to-be-packaged part 1 which is subjected to plastic packaging in a mechanical and thermal removing mode, as shown in fig. 7.

And sequentially carrying out the following operations on two sides of the disassembled plastic package to be packaged 1 to obtain a finished product: seed layer making, photosensitive glue coating, exposure and development, pattern electroplating, film removal, etching, solder resist ink coating, bonding pad exposure, ball planting and cutting.

In summary, the multi-chip embedded heterogeneous packaging structure and the manufacturing method thereof provide a multi-chip embedded heterogeneous packaging method for double-sided simultaneous plastic packaging, which can improve the packaging efficiency, reduce the warpage problem caused by single-sided plastic packaging as much as possible, ensure the feasibility of the subsequent process, and reduce the packaging cost. Meanwhile, through the unique design of the jig and the carrier plate, the jig 4 is easier to place and take down the carrier plate while supporting the carrier plate.

Any combination of the various embodiments of the present invention should be considered as disclosed in the present invention, unless the inventive concept is contrary to the present invention; within the scope of the technical idea of the invention, any combination of various simple modifications and different embodiments of the technical solution without departing from the inventive idea of the present invention shall fall within the protection scope of the present invention.