阅读说明：本技术 电子封装件及其制法 (Electronic package and manufacturing method thereof ) 是由 黄玉龙 郑子企 许元鸿 张宏达 陈麒任 于 2019-09-24 设计创作，主要内容包括：一种电子封装件及其制法,包括多个电子元件、连接各该电子元件的间隔结构以及多个作为外部接点且电性连接该多个电子元件的导电元件,且该间隔结构具有凹部,以加强所述电子元件于相互连接后的可挠性,避免翘曲的问题。(An electronic package and a manufacturing method thereof are provided, which comprises a plurality of electronic elements, a spacing structure connected with each electronic element and a plurality of conductive elements used as external contacts and electrically connected with the electronic elements, wherein the spacing structure is provided with a concave part to strengthen the flexibility of the electronic elements after being connected with each other and avoid the problem of warping.)

1. An electronic package, comprising:

a plurality of electronic components;

the spacing structure is formed between any two adjacent electronic elements and is connected with the any two adjacent electronic elements, and a concave part is formed on the spacing structure; and

and a plurality of conductive elements which are used as external contacts and are electrically connected with the plurality of electronic elements.

2. The electronic package according to claim 1, further comprising a carrier structure having opposite sides for carrying and electrically connecting the electronic components, such that the electronic components are disposed on one of the opposite sides of the carrier structure, and the conductive elements are disposed on the other of the opposite sides of the carrier structure.

3. The electronic package of claim 2, wherein the carrier structure is in the form of a single carrier or a plurality of carriers.

4. The electronic package according to claim 2, wherein a filler is formed between the electronic components and the carrier structure, and the filler further forms the spacer structure.

5. The electronic package according to claim 1, further comprising an encapsulation layer encapsulating the plurality of electronic components, wherein the encapsulation layer further forms the spacer structure.

6. The electronic package according to claim 1, wherein the electronic component has an active surface and an inactive surface opposite to each other and side surfaces adjacent to the active surface and the inactive surface, such that the spacing structure connects the side surfaces of the electronic components.

7. The electronic package of claim 1, wherein the spacer structure comprises a plurality of materials.

8. The electronic package of claim 1, wherein the recess is sloped at a top end of the wall.

9. The electronic package of claim 8, wherein the bevel extends to an adjacent electronic component.

10. The electronic package of claim 1, further comprising a heat spreader coupled to the plurality of electronic components, covering the recess.

11. The electronic package of claim 10, wherein the heat spreader is bonded to the plurality of electronic components via a bonding layer.

12. The electronic package of claim 11, wherein the bonding layer fills the recess but does not fill the recess.

13. A method of fabricating an electronic package, comprising:

providing a plurality of electronic components;

forming a spacing structure between any two adjacent electronic elements so that the spacing structure is connected with the any two adjacent electronic elements;

forming a recess on the spacer structure; and

and configuring a plurality of conductive elements so that the plurality of conductive elements are electrically connected with the plurality of electronic elements and used as external contacts.

14. The method of claim 13, further comprising disposing a carrier structure having two opposite sides, such that one of the two opposite sides of the carrier structure carries and electrically connects the electronic components, and the conductive elements are disposed on the other of the two opposite sides of the carrier structure.

15. The method of claim 14, wherein the carrier structure is in the form of a single carrier or multiple carriers.

16. The method of claim 14, wherein a filler is formed between the electronic components and the supporting structure, and the filler further forms the spacer structure.

17. The method of claim 13, further comprising encapsulating the plurality of electronic components with an encapsulation layer, wherein the encapsulation layer further forms the spacer structure.

18. The method of claim 13, wherein the electronic component has an active surface and an inactive surface opposite to each other and side surfaces adjacent to the active surface and the inactive surface, such that the spacer structure connects the side surfaces of the electronic components.

19. The method of claim 13, wherein the spacer structure comprises a plurality of materials.

20. The method of claim 13, wherein the top of the wall of the recess is sloped.

21. The method of claim 20, wherein the bevel extends to an adjacent electronic component.

22. The method of claim 13, further comprising attaching a heat spreader to the electronic components, wherein the heat spreader covers the recess.

23. The method of claim 22, wherein the heat spreader is bonded to the electronic components via a bonding layer.

24. The method of claim 23, wherein the bonding layer fills the recess but does not fill the recess.

Technical Field

The present invention relates to semiconductor devices, and more particularly, to an electronic package with improved reliability and a method for fabricating the same.

Background

With the development of technology, the demand trend of electronic products is moving toward heterogeneous integration, and for this reason, a multi-chip package structure (MCM/MCP) is gradually emerging.

As shown in fig. 1, in a multi-chip package structure 1, a plurality of semiconductor chips 11 are bonded to a package substrate 10 through a plurality of solder bumps 13, and then a package material 14 covering the plurality of semiconductor chips 11 is formed. By packaging a plurality of semiconductor chips into one semiconductor chip, the semiconductor chip has more I/O numbers, can greatly increase the operational capability of a processor and reduce the delay time of signal transmission, and is applied to high-level products with high-density circuits, high transmission speed, high lamination number and large-size design.

However, diversification of product functions makes the package structure more complex, and the complex structure is implemented in a smaller volume, which results in the structure becoming more fragile and more susceptible to failure when the package structure is warped or otherwise deformed. In addition, due to the structural characteristics of the multi-chip integrated on a substrate, with the increasing market specification requirements, the overall package structure size is increased, so that the problems of delamination, ball cracks, chip cracks and the like caused by warping are increasingly serious.

Therefore, how to overcome the above problems of the prior art has become an issue to be solved.

Disclosure of Invention

In view of the above-mentioned drawbacks of the prior art, the present invention provides an electronic package, comprising: a plurality of electronic components; the spacing structure is formed between the two adjacent electronic elements so as to enable the spacing structure to be connected with the adjacent electronic elements, and a concave part is formed on the spacing structure; and a plurality of conductive elements which are used as external contacts and electrically connected with the plurality of electronic elements.

The invention also provides a manufacturing method of the electronic packaging piece, which comprises the following steps: providing a plurality of electronic components; forming a spacing structure between two adjacent electronic elements so that the spacing structure is connected with the adjacent electronic elements; forming a recess on the spacer structure; and configuring a plurality of conductive elements so that the plurality of conductive elements are electrically connected with the plurality of electronic elements and used as external contacts.

The electronic package and the method for manufacturing the same further include configuring a carrying structure having two opposite sides, such that one of the two opposite sides of the carrying structure carries and electrically connects the plurality of electronic components, and the plurality of conductive components are disposed on the other one of the two opposite sides of the carrying structure. For example, the carrying structure is in the form of a single carrier or in the form of multiple carriers. Furthermore, a filler is formed between the plurality of electronic elements and the supporting structure, and the filler also forms the spacing structure.

The electronic package and the method for manufacturing the same further include encapsulating the plurality of electronic components with an encapsulation layer, wherein the encapsulation layer further forms the spacer structure.

In an embodiment, the electronic component has an active surface and an inactive surface opposite to each other and a side surface adjacent to the active surface and the inactive surface, so that the spacing structure connects the side surfaces of the electronic components.

In the electronic package and the method for fabricating the same, the spacer structure includes a plurality of materials.

In the electronic package and the method for manufacturing the same, the top end of the wall surface of the recess is inclined. Further, the inclined plane extends to the electronic component.

In an embodiment, the electronic package further includes a heat sink coupled to the electronic components, and the heat sink covers the recess. Further, the heat sink is bonded to the plurality of electronic components via a bonding layer. For example, the bonding layer fills the recess but does not fill the recess.

In view of the above, the electronic package and the method for manufacturing the same of the present invention mainly form the concave portion by the spacing structure between the adjacent electronic components, so as to enhance the flexibility of the electronic components after being connected with each other, and compared with the prior art, the present invention can compensate the thermal variation in the subsequent packaging process and avoid the warpage problem.

Drawings

Fig. 1 is a schematic cross-sectional view of a conventional multi-chip package structure.

Fig. 2A to fig. 2E are schematic cross-sectional views illustrating a method for manufacturing an electronic package according to the present invention.

Fig. 2C' is a schematic view of another embodiment of fig. 2C.

Fig. 2E' is an enlarged partial cross-sectional view of fig. 2E.

Fig. 3A to 3C are enlarged partial cross-sectional views of different embodiments of the spacer structure of the electronic package according to the present invention.

Fig. 4 and 5 are schematic cross-sectional views of different embodiments of the electronic package of the present invention.

Description of the reference numerals

1 multi-chip packaging structure 10 packaging substrate

11 semiconductor chip 13 solder bump

14 encapsulating material 2,4,5 electronic package

2a multi-chip package 20,40 carrier structure

200 electric conductor 201,202 carrier plate

203 primer 21 electronic component

21a active surface 21b inactive surface

21c side 210 conductive bump

22 encapsulation layer 22a first surface

22b second surface 23 filler

230 groove 24 conductive element

25 bonding layer 26,56 heat spreader

260 supporting foot of heat dissipation body 261

27 adhesive layer 28,38a,38b,38c,58 recess

281 first opening 282 second opening

29,39b,39c,59 spacing structure a air chamber

d1, d2 Width L distance

P, P' bevel S gap.

Detailed Description

The following description of the embodiments of the present invention is provided by way of specific examples, and other advantages and effects of the present invention will be readily apparent to those skilled in the art from the disclosure herein.

It should be understood that the structures, proportions, and dimensions shown in the drawings and described herein are for illustrative purposes only and are not intended to limit the scope of the present invention, which is defined by the claims, but rather by the claims. In addition, the terms "upper", "lower", "first", "second" and "first" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and changes or modifications in the relative relationship may be made without substantial technical changes.

Fig. 2A to 2E are schematic cross-sectional views illustrating a method for manufacturing the electronic package 2 according to the present invention.

As shown in fig. 2A, a multi-chip package 2A is provided, which includes a carrier structure 20, a plurality of electronic components 21, and a package layer 22.

The carrier structure 20 may be in the form of multiple carrier boards 201 and 202 electrically stacked with each other Through a plurality of conductors 200 (which may be coated by an underfill 203), or in the form of a single carrier board (as the carrier structure 40 shown in fig. 4 is a package substrate), and the present embodiment is described in the form of multiple carrier boards, where the carrier board is, for example, a package substrate with a core layer and a circuit structure, a package substrate with a coreless layer (circuit) type circuit structure, a Through-Silicon via (TSV) Silicon interposer (TSI for short) or other boards, and includes at least one insulating layer and at least one circuit layer connected to the insulating layer, such as at least one fan-out (TSV) type redistribution layer (RDL for short). It should be understood that the supporting structure 20 can also be other chip-supporting boards, such as a lead frame (lead frame), a wafer (wafer), or other boards with metal wires (routing), and the like, but is not limited thereto.

In the present embodiment, the carrier structure 20 has a plurality of carrier process manners, for example, a wafer process may be used to fabricate a circuit layer, and a Chemical Vapor Deposition (CVD) process is used to form silicon nitride or silicon oxide as an insulating layer; alternatively, the circuit layer may be formed by a general amorphous circular process, i.e., a low-cost polymer dielectric material is used as the insulating layer, such as Polyimide (PI), poly (p-phenylene oxide) (PBO), Prepreg (PP), molding compound (molding compound), photosensitive dielectric layer, or other materials.

In addition, the supporting structure 20 may be formed with a plurality of conductive elements 24 (as shown in fig. 2E) on the lower side thereof in a subsequent process, for serving as external contacts for connecting an electronic device (not shown) such as a circuit board. Specifically, the conductive element 24 may be a metal pillar such as a copper pillar, a metal bump coated with an insulating block, a solder ball (solder ball), a solder ball with a core copper ball (Cu core ball), or other conductive structures.

The electronic components 21 are disposed on the upper side of the supporting structure 20 separately from each other.

The electronic component 21 is an active component, such as a semiconductor chip, a passive component, such as a resistor, a capacitor, or an inductor, or a combination thereof. In the present embodiment, the electronic component 21 is a semiconductor chip, which has an active surface 21a and an inactive surface 21b opposite to each other, and a side surface 21c adjacent to the active surface 21a and the inactive surface 21b, and the electrode pads of the active surface 21a are disposed on the carrier structure 20 in a flip-chip manner through a plurality of conductive bumps 210 such as solder material, metal posts (pilar) or others, and are electrically connected to the circuit layer, and the conductive bumps 210 are covered by a filling material 23; alternatively, the electronic device 21 can be electrically connected to the circuit layer of the supporting structure 20 by wire bonding via a plurality of bonding wires (not shown); alternatively, the electronic component 21 may directly contact the circuit layer of the carrier structure 20. Therefore, the carrying structure 20 can be connected with electronic components of desired types and quantities to enhance the electrical functions thereof, and the manner of electrically connecting the electronic components 21 to the carrying structure 20 is not limited to the above.

In addition, the filling material 23 is formed between the carrying structure 20 and the electronic element 21, so that the filling material 23 covers the conductive bump 210. In the present embodiment, the filling material 23 is, for example, an underfill, which is further formed in the gap S between two adjacent electronic components 21. Specifically, the filler 23 extends to the side surface 21c of the electronic component 21 by capillary action.

In addition, at least one groove 230 is formed on the filling material 23 in the gap S. For example, the groove 230 is formed by cutting, laser or etching to remove part of the filling material 23, and the width of the groove 230 may be uniform or non-uniform from the notch to the groove bottom. Specifically, the groove 230 may have a tapered shape or a funnel shape, but is not particularly limited.

The encapsulation layer 22 is formed on the carrier structure 20 and in the groove 230 to encapsulate the electronic element 21 and the filler 23.

In the present embodiment, the encapsulation layer 22 has a first surface 22a and a second surface 22b opposite to each other, the first surface 22a is combined with the carrier structure 20, and the inactive surface 21b of the electronic component 21 is flush with the second surface 22b of the encapsulation layer 22, so that the electronic component 21 is exposed from the second surface 22b of the encapsulation layer 22.

In addition, the material forming the encapsulation layer 22 is an insulating material, such as a Polyimide (PI) or epoxy encapsulant, which may be formed by molding (molding), pressing (laminating) or coating (coating) to fill the recess 230, so that a spacer structure 29 is formed between at least two adjacent electronic components 21, where the spacer structure 29 includes a plurality of materials, such as the material of the encapsulation layer 22 and the insulating material 23.

Referring to fig. 3B and 3C, in other embodiments, the spacer structures 39B and 39C may be made of a single material, such as the filler material 23 shown in fig. 3B or the material of the package layer 22 shown in fig. 3C. It should be understood that the spacer structure may also be disposed with a metal material as a shielding layer of the electronic element 21.

In addition, the spacing structure 29 is connected between the adjacent electronic components 21 to connect the electronic components 21 to each other.

As shown in fig. 2B, at least one first opening 281 is formed on the spacer structure 29.

In the present embodiment, a half-cut operation is performed by cutting, laser or etching, etc., to remove a portion of the material of the encapsulation layer 22 and the filler 23 to form the first opening 281, and after the half-cut operation, the side surfaces 21c of the electronic devices 21 still have the spacer structures 29.

In addition, the wall surface of the first opening 281 is a slope surface P, and the slope surface P extends to the adjacent corner of the inactive surface 21b and the side surface 21c of the electronic component 21 to form a chamfer. Alternatively, as shown in the concave portion 38C of fig. 3C, the inclined surface P' of the first opening 381 does not extend to the electronic component 21, so that the adjacent corner between the non-active surface 21b of the electronic component 21 and the side surface 21C is still at a sharp angle, such as a right angle.

As shown in fig. 2C and continuing to fig. 2B, at least one second opening 282 is formed on the encapsulation layer 22 in the spacer structure 29 from the first opening 281, such that the first and second openings 281,282 serve as the recess 28.

In the present embodiment, a half-cut operation is performed by cutting, laser or etching, etc., to remove a portion of the material of the encapsulation layer 22 to form the second opening 282, and the second opening 282 does not penetrate through the encapsulation layer 22 of the spacer structure 29.

In addition, as shown in fig. 2C and 3C, the process of forming the recesses 28,38C includes multiple half-cuts (forming the first and second openings, respectively), and a second half-cut cuts a flat sidewall groove to form the second opening 282. Alternatively, as shown in fig. 3A and 3B, the recesses 38a,38B may be formed by a single sub-half-cut operation.

In addition, the width d1 of the first opening 281,381 is larger than the width d2 of the second opening 282 and the slope design of the first opening 281,381, so that the first opening 281 can be used as an alignment reference during the manufacturing process to facilitate the formation of the second opening 282.

In addition, as shown in fig. 2C', before the manufacturing process of the recess 28 is performed, the carrier structure 20 may be configured with an interposer type carrier 202, and after the manufacturing process of the recess 28 is completed, the interposer type carrier 202 is electrically stacked on a package substrate type carrier 201 through a plurality of conductors 200 (which may be coated by an underfill 203), so that the carrier structure 20 is formed by the multiple carriers 201,202 electrically stacked with each other, as shown in fig. 2C.

As shown in fig. 2D, a bonding layer 25 is formed on the non-active surface 21b of the electronic component 21 and the second surface 22b of the package layer 22, and the concave portion 28 is exposed.

In the present embodiment, the bonding layer 25 is a liquid heat dissipation adhesive Material, and is used as a Thermal Interface Material (TIM).

As shown in fig. 2E and 2E', a heat sink 26 is provided on the non-active surfaces 21b of the plurality of electronic components 21 via the bonding layer 25, and the bonding layer 25 is thermally cured. Then, a plurality of conductive elements 24 are formed on the lower side of the supporting structure 20, and the conductive elements 24 are electrically connected to the supporting structure 20.

In the present embodiment, the heat sink 26 has a heat spreader 260 and a plurality of support pins 261 disposed on the lower side of the heat spreader 260, the heat spreader 260 is of a heat sink type, the lower side contacts the bonding layer 25, and the support pins 261 are bonded to the supporting structure 20 through an adhesive layer 27.

In addition, the distance L between the bonding layers 25 on the adjacent electronic components 21 is increased by the slopes P, P' of the first opening 281,381, so that the bonding layers 25 are respectively disposed on the electronic components 21 after the heat spreader 260 is pressed, and a large-area sheet body is not bonded (if the bonding layer 25 forms a large-area sheet body, the structural flexibility of the electronic package 2 is easily affected). Understandably, the recesses 38a,38b are formed by a single sub-half-cut process, by adjusting the amount of the bonding layer 25, to prevent the bonding layer 25 from being connected into a large-area sheet.

In addition, as shown in fig. 3A and 3B, if the bonding layer 25 is pressed by the heat sink 26 and then half-filled into the recesses 38a and 38B, the bonding layer 25 can be used as a stop layer for the electronic component 21 to deform and displace due to heat, so that the adjacent electronic components 21 do not directly touch each other.

The electronic package 2 according to the present invention is not limited to the above-described one, and various kinds thereof are available. For example, fig. 5 shows an electronic package 5 in the form of a Wafer Level Chip Scale Packaging (Wafer Level Chip Scale Packaging), wherein the plurality of conductive elements 24 are formed on the active surfaces 21a of the plurality of electronic elements 21 embedded in the package layer 22, and protrude from the first surface 22a of the package layer 22 to serve as external contacts for receiving an electronic device (not shown) such as a circuit board, the spacer structure 59 is made of a single material, the recess 58 is made of a single half-cut, and the heat sink 56 is in the form of a heat sink.

Therefore, the manufacturing method of the present invention cuts the concave portions 28,38a,38b,38c,58 out of the spacing structures 29,39b,39c,59 between two adjacent electronic components 21 to enhance the flexibility of the electronic components 21 after being connected, so as to compensate the thermal variation in the subsequent packaging process and avoid the problem of warping (warping).

In addition, by designing the slope P of the concave portion 28,38c, not only can the position of the second opening 282 be corrected by the subsequent half-cutting, but also the distance L between the adjacent bonding layer 25 can be increased so as to prevent the bonding layer 25 from completely covering the concave portion 28,38 c.

In addition, the bonding layer 25 does not completely cover the recesses 28,38c, so as to maintain the electronic components 21 with better flexibility after being connected. Furthermore, even if the bonding layer 25 is connected as a large-area sheet to completely cover the recesses 38a,38b, the electronic components 21 still have desired flexibility after being connected to each other because the air chambers a still exist in the spacing structures 29,39 b.

In addition, after the recesses 28,38a,38b,38c are formed, the spacer structures 29,39b,39c remained on the side surface 21c of the electronic component 21 are used to avoid the problem of delamination of the filler 23 between the electronic component 21 and the carrier structure 20.

The present invention also provides an electronic package 2,4,5 comprising: a plurality of electronic components 21, at least one spacing structure 29,39b,39c,59 connecting the electronic components 21, and a plurality of conductive elements 24 serving as external contacts and electrically connecting the electronic components 21.

The spacing structures 29,39b,39c,59 are formed between at least two adjacent electronic components 21, so that the spacing structures 29,39b,39c,59 are connected between the adjacent electronic components 21, wherein the spacing structures 29,39b,39c,59 have the concave portions 28,38a,38b,38c, 58.

In one embodiment, the electronic package 2,4 further includes a carrying structure 20,40 having two opposite sides for carrying and electrically connecting the electronic components 21, such that the electronic components 21 are disposed on one of the two opposite sides of the carrying structure 20,40, and the conductive elements 24 are disposed on the other of the two opposite sides of the carrying structure 20, so that the conductive elements 24 are electrically connected to the electronic components 21 through the carrying structure 20, 40. For example, the carrying structure 20 is in the form of a multi-carrier, and the carrying structure 40 is in the form of a single carrier. Further, a filler 23 is formed between the electronic components 21 and the supporting structures 20 and 40, and the filler 23 also constitutes the spacing structures 29 and 39 b.

In one embodiment, the electronic package 2,4,5 further includes an encapsulation layer 22 covering the plurality of electronic components 21, and the encapsulation layer 22 further forms the spacer structures 29,39c, 59.

In one embodiment, the electronic component 21 has an active surface 21a and an inactive surface 21b opposite to each other and a side surface 21c adjacent to the active surface 21a and the inactive surface 21b, so that the spacing structures 29,39b,39c,59 are connected to the side surfaces 21c of the electronic components 21.

In one embodiment, the spacer structure 29 comprises a plurality of materials.

In one embodiment, the walls of the recesses 28,38a are beveled P, P'. Further, the inclined plane P extends to the electronic component 21.

In one embodiment, the electronic packages 2,4,5 further include a heat sink 26,56 coupled to the electronic components 21 and covering the recesses 28,38a,38b,38c, 58. Further, the heat dissipation members 26,56 are bonded to the plurality of electronic components 21 via the bonding layer 25. For example, the bonding layer 25 fills the recesses 28,38a,38b,38c,58 but does not fill the recesses 28,38a,38b,38c, 58.

In one embodiment, the conductive element 24 of the electronic package 5 is directly electrically connected to the electronic elements 21.

In summary, the electronic package and the method for fabricating the same according to the present invention mainly enhance the flexibility of the electronic components after being connected to each other through the design of the recess of the spacer structure, so as to compensate the thermal variation in the subsequent packaging process and avoid the warpage problem, thereby improving the reliability of the electronic package.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify the above-described embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of the invention should be determined from the following claims.