ELECTRONIC PACKAGE AND MANUFACTURING METHOD THEREOF

An electronic package is provided, in which an electronic element and a plurality of shielding pillars are embedded in an encapsulating layer, a shielding layer is formed on one surface of the encapsulating layer to cover the electronic element and is in contact with and connected to the plurality of shielding pillars, and a circuit structure is formed on the other surface of the encapsulating layer to electrically connect to the electronic element. Therefore, when the electronic package is disposed on a circuit board, the design of the shielding layer and the plurality of shielding pillars can provide the electronic element with heat dissipation and shielding effects without a metal cover arranged on the electronic element.

BACKGROUND

1. Technical Field

The present disclosure relates to a semiconductor device and manufacturing method thereof, and more particularly, to an electronic package with electronic element stacking structure and manufacturing method thereof.

2. Description of Related Art

With the vigorous development of the electronic industry, electronic products are also gradually developing towards the trend of multi-function and high performance. Technologies currently used in the field of chip packaging include, for example, flip-chip packaging modules such as chip scale package (CSP), direct chip attached (DCA), or multi-chip module (MCM).

FIG.1is a schematic cross-sectional view of a conventional semiconductor package1. As shown inFIG.1, the semiconductor package1is provided with a semiconductor chip11disposed on a substrate structure10having a dielectric layer100and a circuit layer101in a flip-chip manner (via conductive bumps110), and then the semiconductor chip11is encapsulated by an encapsulating layer15. Afterwards, the semiconductor package1is disposed on a circuit board19with the substrate structure10thereof via a plurality of solder balls17. Then, a top sheet130of a metal cover13is bonded onto the encapsulating layer15via a heat dissipation layer12to cover the semiconductor chip11, and supporting legs131of the metal cover13are disposed on the circuit board19via a metal glue14.

In the conventional semiconductor package1, the metal glue14can be bonded to a grounding pad (not shown) of the circuit board19, so that the metal cover13can be used as a shielding structure to prevent the semiconductor chip11from electromagnetic interference (EMI).

In the conventional semiconductor package1, the heat dissipation and shielding functions for the semiconductor chip11are provided by the configuration of the metal cover13. However, the metal cover13occupies a large use area of the circuit board19, which is not only hard to reduce the use area of the circuit board to achieve the purpose of integration, but also difficult to configure other functional electronic elements to increase the functions of electronic products.

Therefore, there is a need for a solution that addresses the aforementioned shortcomings in the prior art.

SUMMARY

In view of the aforementioned shortcomings of the prior art, the present disclosure provides an electronic package, which comprises: an encapsulating layer having a first surface and a second surface opposing the first surface; an electronic element embedded in the encapsulating layer; a shielding layer formed on the first surface of the encapsulating layer and covering the electronic element; a plurality of shielding pillars embedded in the encapsulating layer and in communication with the first surface and the second surface to contact and connect the shielding layer; and a circuit structure formed on the second surface of the encapsulating layer and electrically connected to the electronic element.

The present disclosure further provides a method of manufacturing an electronic package, the method comprises: forming a shielding layer on a carrier; disposing an electronic element on the shielding layer, and forming a plurality of shielding pillars on the shielding layer, wherein the plurality of shielding pillars are in contact with and connected to the shielding layer; forming an encapsulating layer on the shielding layer, wherein the electronic element and the plurality of shielding pillars are covered by the encapsulating layer, wherein the encapsulating layer is defined with a first surface and a second surface opposing the first surface, and the encapsulating layer is bonded onto the shielding layer with the first surface of the encapsulating layer; forming a circuit structure on the second surface of the encapsulating layer, wherein the circuit structure is electrically connected to the electronic element; and removing the carrier.

In the aforementioned electronic package and method, the present disclosure further comprises forming a bonding layer between the shielding layer and the electronic element.

In the aforementioned electronic package and method, the shielding layer is in contact with the electronic element.

In the aforementioned electronic package and method, a width of each of the plurality of shielding pillars is greater than a thickness of the shielding layer.

In the aforementioned electronic package and method, the electronic element is surrounded by the plurality of shielding pillars.

In the aforementioned electronic package and method, the present disclosure further comprises forming a shielding portion on the circuit structure, wherein the shielding portion is connected to the plurality of shielding pillars. For example, the shielding portion is formed on side surfaces of the circuit structure. Alternatively, the shielding portion is arranged obliquely relative to the second surface of the encapsulating layer. The present disclosure further comprises forming an insulating protection layer to cover at least part of the shielding portion.

In the aforementioned electronic package and method, a maximum width of the circuit structure is less than a width of the second surface of the encapsulating layer.

As can be understood from the above, in the electronic package of the present disclosure and manufacturing method thereof, the conventional metal cover is replaced by the design of the shielding layer and the shielding pillars. Therefore, compared with the prior art, after the electronic package of the present disclosure is disposed on the circuit board, the electronic package can provide heat dissipation and shielding effect to the electronic element without disposing a conventional metal cover. Thus, the electronic package of the present disclosure is conducive to reduce the use area of the circuit board and achieve the purpose of integration, so that electronic products meet the requirement of miniaturization.

On the other hand, if the use area of the circuit board is maintained, when the electronic package is disposed on the circuit board, other functional electronic elements can be configured without disposing a conventional metal cover, so the function of electronic products can be increased to facilitate the multifunctional purpose of electronic products.

DETAILED DESCRIPTION

Implementations of the present disclosure are described below by embodiments. Other advantages and technical effects of the present disclosure can be readily understood by one of ordinary skill in the art upon reading the disclosure of this specification.

It should be noted that the structures, ratios, sizes shown in the drawings appended to this specification are provided in conjunction with the disclosure of this specification in order to facilitate understanding by those skilled in the art. They are not meant, in any ways, to limit the implementations of the present disclosure, and therefore have no substantial technical meaning. Without influencing the effects created and objectives achieved by the present disclosure, any modifications, changes or adjustments to the structures, ratios, or sizes are construed as falling within the scope covered by the technical contents disclosed herein. Meanwhile, terms such as “on,” “first,” “second,” “a,” “one” and the like, are for illustrative purposes, and are not meant to limit the scope implementable by the present disclosure. Any changes or adjustments made to the relative relationships, without substantially modifying the technical contents, are also to be construed as within the scope implementable by the present disclosure.

FIG.2A-1,FIG.2B,FIG.2C,FIG.2D,FIG.2EandFIG.2F-1are schematic cross-sectional views illustrating a method of manufacturing an electronic package2according to a first embodiment of the present disclosure.

As shown inFIG.2A-1, a carrier9having an insulating base layer26and a shielding layer22is provided, and a plurality of shielding pillars23are formed on the shielding layer22, and at least one electronic element21is disposed on the shielding layer22.

In an embodiment, the carrier9is a circular plate made of semiconductor material such as glass, on which the insulating base layer26is formed, and the shielding layer22is formed on the insulating base layer26. For example, the insulating base layer26is made of polybenzoxazole (PBO), polyimide (PI), prepreg (PP), or other dielectric materials, and the shielding layer22is a copper layer.

Moreover, the electronic element21is a semiconductor element, such as an active element, a passive element, or a combination of the active element and the passive element. The active element may be a semiconductor chip, and the passive element may be a resistor, a capacitor, or an inductor. For example, the electronic element21is a semiconductor chip and has an active surface21aand an inactive surface21bopposing the active surface21a. The active surface21ahas a plurality of electrode pads210for arranging conductors211such as copper blocks and/or solder bumps, and an insulating layer212made of such as a dielectric material is formed on the active surface21ato cover the conductors211.

Also, the electronic element21is adhesively fixed on the shielding layer22with the inactive surface21bof the electronic element21by a bonding layer213such as glue, so that the bonding layer213is arranged between the shielding layer22and the electronic element21. For example, the bonding layer213is formed on a lower side of the electronic element21first, and then the electronic element21is adhesively fixed on the shielding layer22. It should be understood that the bonding layer213may also be formed on the shielding layer22first, and then the electronic element21is adhesively fixed on the bonding layer213.

In addition, the shielding pillars23are in contact with and disposed on the shielding layer22and surround the electronic element21(as shown inFIG.2A-2), and the shielding pillars23are made of metal material (such as copper) or solder material. For example, a width R of the shielding pillar23is greater than a thickness t of the shielding layer22.

As shown inFIG.2B, an encapsulating layer25is formed on the shielding layer22, so that the electronic element21and the shielding pillars23are covered by the encapsulating layer25.

In an embodiment, the encapsulating layer25is defined with a first surface25aand a second surface25bopposing the first surface25a, so that the encapsulating layer25is bonded on the shielding layer22with the first surface25aof the encapsulating layer25.

Furthermore, the encapsulating layer25is made of an insulating material, such as polyimide (PI), dry film, epoxy resin, molding compound, or other packaging materials. The encapsulating layer25can be formed on the shielding layer22by lamination or molding. Also, part of the material of the shielding pillars23, part of the material of the insulating layer212(part of the material of the conductors211can be removed according to requirements) and part of the material of the second surface25bof the encapsulating layer25can be removed by a leveling process such as grinding, so that end surfaces23bof the shielding pillars23, an exterior surface of the insulating layer212and exterior surfaces of the conductors211are flush with the second surface25bof the encapsulating layer25, so that the end surfaces23bof the shielding pillars23and the exterior surfaces of the conductors211of the electronic element21are exposed from the encapsulating layer25. It should be understood that there are many ways to expose the shielding pillars23and the conductors211from the encapsulating layer25, and the present disclosure is not limited to the above.

As shown inFIG.2C, a circuit structure20is formed on one region of the second surface25bof the encapsulating layer25, so that the end surfaces23bof the shielding pillars23are still exposed from the other region of the second surface25bof the encapsulating layer25, and the circuit structure20is electrically connected to the plurality of conductors211of the electronic element21, wherein side surfaces20cof the circuit structure20are non-perpendicular relative to the second surface25bof the encapsulating layer25.

In an embodiment, the circuit structure20comprises a plurality of dielectric layers200, and a plurality of circuit layers201disposed on the plurality of dielectric layers200and electrically connected to the conductors211. The circuit layers201are for instance of redistribution layer (RDL) specification, and the outermost circuit layer201is exposed from the outermost dielectric layer200. Alternatively, the circuit structure20may also merely comprise a single dielectric layer200and a single circuit layer201.

Moreover, the material forming the circuit layer201is copper, and the material forming the dielectric layer200is polybenzoxazole (PBO), polyimide (PI), prepreg (PP), or other dielectric materials.

Also, the side surfaces20cof the circuit structure20are inclined relative to the second surface25bof the encapsulating layer25, so that the shape of the circuit structure20is trapezoidal or cone-shaped.

As shown inFIG.2D, a plurality of electrical contact pads202electrically connected to the circuit layer201are formed on the outermost dielectric layer200of the circuit structure20, and a shielding portion24is formed on the other region of the second surface25bof the encapsulating layer25and the side surfaces20cof the circuit structure20, so that the shielding portion24is in contact with and covers the end surfaces23bof the shielding pillars23, and the shielding portion24extends continuously from the second surface25bof the encapsulating layer25to the outermost dielectric layer200.

In an embodiment, the shielding portion24is made of a metal material such as copper and is formed on the other region of the second surface25bof the encapsulating layer25and the side surfaces20cof the circuit structure20by sputtering, evaporation, electroplating, chemical plating (electroless plating), foiling, or other coating methods, so that the shielding portion24is arranged obliquely relative to the second surface25bof the encapsulating layer25.

Furthermore, the electrical contact pads202are of RDL specification. For example, a metal material such as copper is formed on the entire surface of the dielectric layer200by electroplating, sputtering, deposition, or other coating methods, and then a patterning process is performed to remove excess metal material by etching, so that the remaining metal material may be served as the electrical contact pads202. Therefore, the shielding portion24and the electrical contact pads202can be fabricated together to greatly reduce the process time.

Also, the shielding portion24can be in contact with the circuit layer201exposed from the side surfaces20cwhen the circuit layer201is exposed from the side surfaces20cof the circuit structure20, so that the shielding portion24is grounded and connected to the circuit layer201. Alternatively, the shielding portion24can be directly connected to the electrical contact pads202so that the shielding portion24is grounded and connected to the electrical contact pads202. It should be understood that the shielding portion24can also be in contact with the circuit layer201exposed from the side surfaces20cand the electrical contact pads202simultaneously, so that the shielding portion24is grounded and connected to the circuit layer201and the electrical contact pads202.

As shown inFIG.2E, a plurality of conductive elements27are formed on the electrical contact pads202, and then the carrier9is removed to expose the insulating base layer26.

In an embodiment, the conductive elements27are solder balls, metal pillars, or other structures suitable for external elements. For example, an under bump metallurgy (UBM) layer (not shown) may be formed on the electrical contact pads202to facilitate bonding the conductive elements27.

As shown inFIG.2F-1, a singulation process is performed along cutting paths S shown inFIG.2Eto obtain a plurality of the electronic packages2, and a maximum width D1of the circuit structure20is less than a width DO of the second surface25bof the encapsulating layer25.

In an embodiment, in the electronic package2, the shielding portion24, the shielding layer22and the shielding pillars23are connected together to serve as a shielding structure2ato protect the electronic element21from electromagnetic interference (EMI).

Furthermore, the shielding layer22is bonded to the electronic element21, so that the shielding layer22can also be used as a heat dissipation layer to facilitate heat dissipation of the electronic element21.

Also, the shielding layer22is exposed from side surfaces25cof the encapsulating layer25. It should be understood that, according to requirements, after the singulation process, the shielding layer22is free from being exposed from the side surfaces25cof the encapsulating layer25as an electronic package2bshown inFIG.2F-2.

In addition, in the subsequent process, as shown inFIG.2G, the electronic package2can be disposed on an electronic device29such as a semiconductor chip, a packaging module, a circuit board, or other elements via the conductive elements27.

Therefore, the manufacturing method of the electronic package2,2bof the present disclosure replaces the conventional metal cover13with the design of the shielding layer22and the shielding pillars23, where the shielding layer22, the shielding pillars23and the shielding portion24are grounded and connected to the circuit structure20. Hence, compared with the prior art, the electronic package2,2bof the present disclosure can provide the electronic element21with the heat dissipation and the shielding effect without arranging a conventional metal cover after being disposed on the electronic device29(or circuit board), thereby facilitating the reduction of the use area of the electronic device29(or circuit board), so as to achieve the purpose of integration and meet the requirement of miniaturization of electronic products.

On the other hand, if the use area of the electronic device29(or circuit board) is maintained, after the electronic package2,2bis disposed on the electronic device29(or circuit board), there is no need to arrange a conventional metal cover, so as to arrange other functional electronic elements (not shown), so the functions of electronic products can be increased to facilitate the multifunctional purpose of electronic products.

Furthermore, as shown inFIG.2G, the shielding portion24is arranged obliquely relative to the second surface25bof the encapsulating layer25, so that after the electronic package2,2bis disposed on the electronic device29(or circuit board), the circuit structure20is gradually decreased from the width D1(from the side of the encapsulating layer25) toward a width D2(from the side of the conductive element27). Therefore, the space of the electronic device29(or circuit board) around the circuit structure20can be increased to facilitate the arrangements of other functional electronic elements (not shown).

FIG.3AtoFIG.3Care schematic cross-sectional views illustrating a method of manufacturing an electronic package3,3a,3baccording to a second embodiment of the present disclosure. The difference between the second embodiment and the first embodiment lies in additionally arranging an insulating protection layer38, and the other manufacturing processes are substantially the same, so the similarities will not be repeated below.

As shown inFIG.3A, continuing the process shown inFIG.2D, the insulating protection layer38is formed on the outline of the circuit structure20(i.e., the side surfaces20cand the outermost layer of the dielectric layer200and the circuit layer201), so that the insulating protection layer38covers at least part of the shielding portion24, and the plurality of electrical contact pads202are exposed from the insulating protection layer38.

In an embodiment, the insulating protection layer38is made of materials such as polybenzoxazole (PBO), polyimide (PI), prepreg (PP), or other dielectric materials, even a solder mask.

Furthermore, the insulating protection layer38is formed with a plurality of openings380, so that each of the electrical contact pads202is correspondingly exposed from each of the openings380. Alternatively, the surface of the insulating protection layer38can be flush with the surfaces of the electrical contact pads202by a leveling process to expose each of the electrical contact pads202.

In addition, in an embodiment, the bonding layer213can be omitted in the manufacturing process ofFIG.2A-1, so that the shielding layer22can be in contact with the electronic element21.

As shown inFIG.3B-1, proceeding the processes shown inFIG.2EtoFIG.2F-1to obtain a plurality of the electronic packages3aof which the shielding portion24is at least partially embedded in the dielectric body (the insulating protection layer38and the dielectric layer200can be regarded as one body).

In an embodiment, the shielding layer22can be exposed (as shown inFIG.3B-1) or not exposed (as the electronic package3bshown inFIG.3B-2) from the side surfaces25cof the encapsulating layer25according to requirements.

In addition, the insulating base layer26can be removed as required while removing the carrier9, such as the electronic package3shown inFIG.3C, so as to expose the shielding layer22.

Therefore, the manufacturing method of the electronic package3,3a,3bof the present disclosure replaces the conventional metal cover13with the design of the shielding layer22and the shielding pillars23, where the shielding layer22, the shielding pillars23and the shielding portion24are grounded and connected to the circuit structure20. Therefore, compared with the prior art, the electronic package3,3a,3bof the present disclosure can provide the electronic element21with the heat dissipation and the shielding effect without arranging a conventional metal cover after being disposed on the electronic device29(or circuit board), thereby facilitating the reduction of the use area of the electronic device29(or circuit board), so as to achieve the purpose of integration and meet the requirement of miniaturization of electronic products.

On the other hand, if the use area of the electronic device29(or circuit board) is maintained, after the electronic package3,3a,3bis disposed on the electronic device29(or circuit board), there is no need to arrange a conventional metal cover, so as to arrange other functional electronic elements (not shown), so the functions of electronic products can be increased to facilitate the multifunctional purpose of electronic products.

Furthermore, the shielding portion24is arranged obliquely relative to the second surface25bof the encapsulating layer25, so that after the electronic package is disposed on the electronic device29(or circuit board), the circuit structure20is gradually decreased from the width D1(from the side of the encapsulating layer25) toward the width D2(from the side of the conductive element27). Therefore, the space of the electronic device29(or circuit board) around the circuit structure20can be increased to facilitate the arrangements of other functional electronic elements (not shown).

The present disclosure also provides an electronic package2,2b,3,3a,3b, which comprises: an encapsulating layer25, an electronic element21embedded in the encapsulating layer25, a shielding layer22, a plurality of shielding pillars23, and a circuit structure20.

The encapsulating layer25has a first surface25aand a second surface25bopposing the first surface25a.

The shielding layer22is formed on the first surface25aof the encapsulating layer25to cover the electronic element21.

The shielding pillars23are embedded in the encapsulating layer25and in communication with the first surface25aand the second surface25bto contact and connect the shielding layer22.

The circuit structure20is formed on the second surface25bof the encapsulating layer25and is electrically connected to the electronic element21.

In one embodiment, a bonding layer213is formed between the shielding layer22and the electronic element21.

In one embodiment, the shielding layer22is in contact with the electronic element21.

In one embodiment, a width R of the shielding pillar23is greater than a thickness t of the shielding layer22.

In one embodiment, the electronic element21is surrounded by the plurality of shielding pillars23.

In one embodiment, a shielding portion24connected to the shielding pillars23is disposed on the circuit structure20. For example, the shielding portion24is formed on the side surfaces20cof the circuit structure20. Alternatively, the shielding portion24is disposed obliquely relative to the second surface25bof the encapsulating layer25. Further, the electronic package3may comprise an insulating protection layer38covering at least part of the shielding portion24.

In one embodiment, a maximum width D1of the circuit structure20is less than a width DO of the second surface25bof the encapsulating layer25.

In view of the above, the electronic package of the present disclosure and manufacturing method thereof provide the design of the shielding layer and the shielding pillars, so that after the electronic package is disposed on an electronic device, the electronic package can provide heat dissipation and shielding effect to the electronic element without disposing a conventional metal cover. Therefore, the electronic package of the present disclosure is conducive to reduce the use area of the electronic device and achieve the purpose of integration, so that electronic products meet the requirement of miniaturization.

On the other hands, if the use area of the electronic device is maintained, when the electronic package is disposed on the electronic device, other functional electronic elements can be configured without disposing a conventional metal cover, so the function of electronic products can be increased to facilitate the multifunctional purpose of electronic products.

The above embodiments are provided for illustrating the principles of the present disclosure and its technical effect, and should not be construed as to limit the present disclosure in any way. The above embodiments can be modified by one of ordinary skill in the art without departing from the spirit and scope of the present disclosure. Therefore, the scope claimed of the present disclosure should be defined by the following claims.