阅读说明：本技术 半导体封装件 (Semiconductor package ) 是由 李智贤 崔正坤 河京武 于 2019-07-05 设计创作，主要内容包括：本发明提供一种半导体封装件,所述半导体封装件包括：半导体芯片；包封剂,覆盖半导体芯片的至少一部分；连接结构,设置在半导体芯片的有效表面上,并包括电连接到半导体芯片的连接焊盘的一个或更多个重新分布层；表面处理层,设置在连接结构的一个或更多个重新分布层中的最下重新分布层的表面上；以及钝化层,设置在连接结构上,覆盖最下重新分布层和表面处理层中的每个的至少一部分,并且具有暴露表面处理层的至少一部分的开口。最下重新分布层的设置有表面处理层的第一表面的表面粗糙度大于最下重新分布层的与第一表面相对的第二表面的表面粗糙度,并且表面处理层具有与最下重新分布层的第一表面的表面粗糙度相对应的凹凸度。(The present invention provides semiconductor packages including a semiconductor chip, an encapsulant covering at least portions of the semiconductor chip, a connection structure disposed on an active surface of the semiconductor chip and including or more redistribution layers electrically connected to connection pads of the semiconductor chip, a surface treatment layer disposed on a surface of a lowermost redistribution layer of the or more redistribution layers of the connection structure, and a passivation layer disposed on the connection structure, covering at least portions of each of the lowermost redistribution layer and the surface treatment layer, and having an opening exposing at least portions of the surface treatment layer.)

A semiconductor package of the kind , comprising:

a semiconductor chip having an active surface on which connection pads are provided and an inactive surface opposite to the active surface;

an encapsulant covering at least portions of the semiconductor chip;

a connection structure disposed on the active surface of the semiconductor chip and including or more redistribution layers electrically connected to the connection pads;

a surface treatment layer disposed on a surface of a lowermost redistribution layer of the or more redistribution layers of the connection structure, and

a passivation layer disposed on the connection structure covering at least portions of each of the lowermost redistribution layer and the surface treatment layer and having an opening exposing at least portions of the surface treatment layer,

wherein a surface roughness of an th surface of the lowermost redistribution layer on which the surface treatment layer is disposed is greater than a surface roughness of a second surface of the lowermost redistribution layer opposite to the th surface on which the surface treatment layer is disposed, and

the surface treatment layer has a relief corresponding to a surface roughness of the th surface of the lowermost redistribution layer.

2. The semiconductor package according to claim 1, wherein the surface treatment layer has a plurality of conductor layers, and

each of the conductor layers has a concavity and convexity corresponding to a surface roughness of the th surface of the lowermost redistribution layer.

3. The semiconductor package according to claim 2, wherein the th surface of the lowermost redistribution layer on which the surface treatment layer is disposed has a surface roughness of 1 μ ι η to 3 μ ι η.

4. The semiconductor package according to claim 2, wherein each of the conductor layers has a concavity and convexity of 1 μm to 3 μm.

5. The semiconductor package of claim 1, wherein the lowermost redistribution layer comprises a copper layer, and

the surface treatment layer includes a nickel layer disposed on the copper layer of the lowermost redistribution layer and a gold layer disposed on the nickel layer.

6. The semiconductor package according to claim 5, wherein a surface of the copper layer has a surface roughness,

the nickel layer has a roughness corresponding to a surface roughness of the copper layer, and

the gold layer has a relief corresponding to the relief of the nickel layer.

7. The semiconductor package of claim 5, wherein the copper layer is thicker than the nickel layer and the gold layer.

8. The semiconductor package of claim 7, wherein the nickel layer is thicker than the gold layer.

9. The semiconductor package of claim 1, further comprising: an electrical connection structure disposed on the opening of the passivation layer and connected to the surface treatment layer exposed through the opening of the passivation layer.

10. The semiconductor package of claim 9, wherein the electrical connection structure is a solder ball.

11. The semiconductor package of claim 9, wherein the surface treatment layer is disposed directly between the electrical connection structure and the lowermost redistribution layer.

12. The semiconductor package of claim 1, further comprising: a frame having a through-hole,

wherein the semiconductor chip is disposed in the through-hole, and

the encapsulant fills at least portions of the through-hole.

13. The semiconductor package of claim 12, wherein the frame comprises an th insulating layer, a th wiring layer embedded in the th insulating layer to expose a lower surface, a second wiring layer disposed on an upper surface of the th insulating layer, a th wiring via penetrating the th insulating layer and electrically connecting the th wiring layer to the second wiring layer, a second insulating layer disposed on an upper surface of the th insulating layer and covering at least a portion of the second wiring layer, a third wiring layer disposed on an upper surface of the second insulating layer, and a second wiring via penetrating the second insulating layer and electrically connecting the second wiring layer to the third wiring layer, and

the routing layer, the second routing layer, and the third routing layer are electrically connected to the connection pads.

14. The semiconductor package according to claim 12, wherein the frame comprises an th insulating layer, a th wiring layer provided on a lower surface of the 0 th insulating layer, a second wiring layer provided on an upper surface of the 1 th insulating layer, a 2 th wiring via penetrating the th insulating layer and electrically connecting the th wiring layer to the second wiring layer, a second insulating layer provided on a lower surface of the th insulating layer and covering at least an portion of the th wiring layer, a third wiring layer provided on a lower surface of the second insulating layer, a second wiring via penetrating the second wiring layer and electrically connecting the th wiring layer to the third wiring layer, a third insulating layer provided on an upper surface of the th insulating layer and covering at least a portion of the second wiring layer, a fourth wiring layer provided on an upper surface of the third insulating layer, and a third wiring via penetrating the third insulating layer and electrically connecting the second wiring layer to the fourth wiring layer and electrically connecting the third wiring layer

The routing layer, the second routing layer, the third routing layer, and the fourth routing layer are electrically connected to the connection pads.

15, A semiconductor package, comprising:

a semiconductor chip having an active surface on which connection pads are provided and an inactive surface opposite to the active surface;

an encapsulant covering at least portions of the semiconductor chip;

a connection structure disposed on the active surface of the semiconductor chip and including or more redistribution layers electrically connected to the connection pads;

a surface treatment layer including a th conductor layer and a second conductor layer, the th conductor layer being disposed on a surface of a lowermost redistribution layer of the or more redistribution layers, the second conductor layer being disposed on the th conductor layer, and

a passivation layer disposed on the connection structure covering at least portions of each of the lowermost redistribution layer and the surface treatment layer and having an opening exposing at least portions of the surface treatment layer,

wherein the th conductor layer and the second conductor layer have concavities and convexities corresponding to each other.

16. The semiconductor package of claim 15, further comprising: an electrical connection structure disposed on the opening of the passivation layer, in contact with the passivation layer through a sidewall of the opening, and connected to the surface treatment layer exposed through the opening of the passivation layer.

17. The semiconductor package of claim 16, wherein the surface treatment layer is disposed directly between the electrical connection structure and the lowermost redistribution layer.

Technical Field

The present disclosure relates to kinds of semiconductor packages, and more particularly, to kinds of fan-out type semiconductor packages in which connection pads of a semiconductor chip can be redistributed to the outside of a fan-out region.

Background

An important recent trend in the development of technologies involving semiconductor chips is the reduction in size of semiconductor chips. Therefore, in the field of packaging technology, with the rapid increase in demand for small-sized semiconductor chips and the like, it has been required to realize a semiconductor package having a compact size while including a plurality of pins.

The proposed packaging technologies that satisfy the above-described technical demands are fan-out type semiconductor packages that have compact sizes and can realize a plurality of pins by redistributing connection terminals to the outside of a region where a semiconductor chip is disposed.

In another aspect , in the case of a semiconductor package, an Under Bump Metallurgy (UBM) is typically formed on the lowermost side of the redistribution layer to connect the solder balls.

Disclosure of Invention

The aspect of the present disclosure provides fan-out type semiconductor packages capable of ensuring excellent interface adhesion and reliability while omitting an under bump metal layer, in a manner similar to the case where the under bump metal layer is provided.

According to the aspect of the present disclosure, the roughness treatment is relatively excessively performed on the surface of the lowermost redistribution layer to form a significant surface roughness, the surface treatment layer is formed on the surface having the surface roughness, and thus the surface treatment layer is provided in the form of a concavity and convexity corresponding to the surface roughness of the surface of the lowermost redistribution layer.

According to aspects of the present disclosure, a kind of semiconductor package includes a semiconductor chip having an active surface on which a connection pad is disposed and an inactive surface opposite to the active surface, an encapsulant covering at least portions of the semiconductor chip, a connection structure disposed on the active surface of the semiconductor chip and including or more redistribution layers electrically connected to the connection pad, a surface treatment layer disposed on a surface of a lowermost redistribution layer of the or more redistribution layers of the connection structure, and a passivation layer disposed on the connection structure, covering at least portions of each of the lowermost redistribution layer and the surface treatment layer, and having an opening exposing at least portions of the surface treatment layer.

According to aspect of the present disclosure, a kind of semiconductor packages includes a semiconductor chip having an active surface on which a connection pad is disposed and an inactive surface opposite to the active surface, an encapsulant covering at least 0 portions of the semiconductor chip, a connection structure disposed on the active surface of the semiconductor chip and including or more redistribution layers electrically connected to the connection pad, a surface treatment layer including a th conductor layer and a second conductor layer, the th conductor layer being disposed on a surface of a lowermost redistribution layer of the or more redistribution layers, the second conductor layer being disposed on the th conductor layer, and a passivation layer disposed on the connection structure covering at least portions of each of the lowermost redistribution layer and the surface treatment layer and having an opening exposing at least portion of the surface treatment layer, the th and the second conductor layer having a degree of concavity and convexity corresponding to each other.

Drawings

The above and other aspects, features and advantages of the present disclosure will be more clearly understood from the following detailed description taken in conjunction with the accompanying drawings, in which:

fig. 1 is a block diagram schematically illustrating an example of an electronic device system;

fig. 2 is a schematic perspective view showing an example of an electronic device;

fig. 3A and 3B are schematic sectional views showing states of a fan-in type semiconductor package before and after being packaged;

fig. 4 is a schematic cross-sectional view illustrating a packaging process of a fan-in type semiconductor package;

fig. 5 is a schematic sectional view showing a case where a fan-in type semiconductor package is mounted on a printed circuit board and is finally mounted on a main board of an electronic device;

fig. 6 is a schematic sectional view showing a case where a fan-in type semiconductor package is embedded in a printed circuit board and finally mounted on a main board of an electronic device;

fig. 7 is a schematic sectional view showing a fan-out type semiconductor package;

fig. 8 is a schematic sectional view showing a case where a fan-out type semiconductor package is mounted on a main board of an electronic device;

fig. 9 is a schematic sectional view showing an example of a fan-out type semiconductor package;

fig. 10 is a schematic plan view taken along line I-I' of the fan-out type semiconductor package of fig. 9;

fig. 11A and 11B are schematic process diagrams illustrating a manufacturing example of the fan-out type semiconductor package of fig. 9;

FIG. 12 is a schematic cross-sectional view illustrating another example of a fan-out semiconductor package, and

fig. 13 is a schematic cross-sectional view illustrating another example of a fan-out semiconductor package.

Detailed Description

Hereinafter, embodiments of the present disclosure will be described as follows with reference to the accompanying drawings.

This disclosure may, however, be embodied in many different forms and should not be construed as limited to the particular embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

Throughout the specification, it will be understood that when an element such as a layer, region, or wafer (substrate) is referred to as being "on," "connected to," or "bonded to" another element, it can be directly "on," "connected to," or "bonded to" another element or another element, or there can be other elements intervening therebetween.

It will be apparent that, although the terms "," "second," "third," etc. may be used herein to describe various members, components, regions, layers and/or sections, any such members, components, regions, layers and/or sections should not be limited by these terms.

For example, if the device in the figures is turned over, elements described as "above" or "above" relative to other elements would then be "below" or "beneath" relative to the other elements.

It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or groups thereof, but do not preclude the presence or addition of or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Hereinafter, embodiments of the present disclosure will be described with reference to schematic drawings showing embodiments of the present disclosure. In the drawings, variations in the shapes of the illustrations as a result, for example, of manufacturing techniques and/or tolerances, may be considered. Thus, embodiments of the present disclosure should not be construed as limited to the particular shapes of regions illustrated herein but are to include, for example, variations in shapes that result from manufacture. The following embodiments may also be constituted alone, in combination, or in partial combination.

The disclosure described below may have various configurations and only required configurations are set forth herein, but is not limited thereto.

Electronic device

Fig. 1 is a schematic block diagram illustrating an example of an electronic device system.

Referring to fig. 1, an electronic device 1000 may house a motherboard 1010. Motherboard 1010 may include chip-related components 1020, network-related components 1030, other components 1040, etc. physically or electrically connected thereto. These components may be connected to other components described below by various signal lines 1090.

The chip related component 1020 may include: a memory chip such as a volatile memory (e.g., a Dynamic Random Access Memory (DRAM)), a nonvolatile memory (e.g., a Read Only Memory (ROM)), a flash memory, or the like; an application processor chip such as a central processing unit (e.g., Central Processing Unit (CPU)), a graphics processor (e.g., Graphics Processing Unit (GPU)), a digital signal processor, a cryptographic processor, a microprocessor, a microcontroller, or the like; and logic chips such as analog-to-digital converters, Application Specific Integrated Circuits (ASICs), and the like. However, the chip-related component 1020 is not limited thereto, and may include other types of chip-related components. Further, the chip related components 1020 may be combined with each other.

Network-related components 1030 may include components that implement protocols such as Wireless Fidelity (Wi-Fi) (institute of Electrical and electronics Engineers (IEEE) family 802.11, etc.), Worldwide Interoperability for Microwave Access (WiMAX) (IEEE family 802.16, etc.), IEEE 802.20, Long Term Evolution (LTE), evolution data optimized (Ev-DO), high speed packet Access + (HSPA +), high speed Downlink packet Access + (HSDPA +), high speed uplink packet Access + (HSUPA +), Enhanced Data GSM Environment (EDGE), Global System for Mobile communications (GSM), Global Positioning System (GPS), General Packet Radio Service (GPRS), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Digital Enhanced Cordless Telecommunications (DECT), Bluetooth, 3G protocol, 4G protocol, and 5G protocol, and any other wireless and wired protocols specified after the above protocols, however, network-related components 1030 are not so limited, and may also include components that implement various other wireless or wired standards or protocols, in addition to chip- related components 1030 and 1020 described above.

Other components 1040 may include high frequency inductors, ferrite inductors, power inductors, ferrite beads, low temperature co-fired ceramics (LTCC), electromagnetic interference (EMI) filters, multilayer ceramic capacitors (MLCC), etc. however, other components 1040 are not so limited, but may also include passive components for various other purposes, etc. further, other components 1040 may be combined with one another with the above-described chip-related component 1020 or network-related component 1030 .

Depending on the type of electronic device 1000, the electronic device 1000 includes other components that may or may not be physically or electrically connected to the motherboard 1010. These other components may include, for example, a camera 1050, an antenna 1060, a display 1070, a battery 1080, an audio codec (not shown), a video codec (not shown), a power amplifier (not shown), a compass (not shown), an accelerometer (not shown), a gyroscope (not shown), a speaker (not shown), a mass storage unit (e.g., a hard disk drive) (not shown), a Compact Disc (CD) drive (not shown), a Digital Versatile Disc (DVD) drive (not shown), and so forth. However, these other components are not limited thereto, but may also include other components for various purposes according to the type of the electronic device 1000 and the like.

The electronic device 1000 may be a smart phone, a Personal Digital Assistant (PDA), a digital video camera, a digital camera, a network system, a computer, a monitor, a tablet PC, a laptop PC, a netbook PC, a television, a video game, a smart watch, an automotive component, and so forth. However, the electronic device 1000 is not limited thereto, but may be any other electronic device that processes data.

Fig. 2 is a schematic perspective view showing an example of the electronic device.

Referring to fig. 2, a semiconductor package may be used for various purposes in various electronic devices 1000 as described above, for example, a printed circuit board 1110 such as a motherboard may be accommodated in a main body 1101 of a smart phone 1100, and various electronic components 1120 may be physically or electrically connected to the printed circuit board 1110, in addition, other components (such as a camera module 1130) that may or may not be physically or electrically connected to the printed circuit board 1110 may be accommodated in the main body 1101, of the electronic components 1120 may be chip-related components, for example, a semiconductor package 1121, but is not limited thereto.

Semiconductor package

Typically, a large number of microelectronic circuits are integrated in a semiconductor chip. However, the semiconductor chip itself may not be used as a finished semiconductor product, and may be damaged by external physical or chemical impact. Therefore, the semiconductor chip itself may not be used, and the semiconductor chip may be packaged and used in an electronic device or the like in a packaged state.

Here, in terms of electrical connection, a semiconductor package is required because of a difference in circuit width between the semiconductor chip and the main board of the electronic device. In detail, the size of the connection pads of the semiconductor chip and the pitch between the connection pads of the semiconductor chip are very fine, while the size of the component mounting pads of the main board and the pitch between the component mounting pads of the main board used in the electronic device are significantly larger than the size of the connection pads of the semiconductor chip and the pitch between the connection pads of the semiconductor chip. Therefore, it may be difficult to directly mount the semiconductor chip on the main board, and a packaging technique for alleviating the difference in circuit width between the semiconductor chip and the main board is required.

Semiconductor packages manufactured by the packaging technology may be classified into fan-in type semiconductor packages and fan-out type semiconductor packages according to their structures and purposes.

Hereinafter, a fan-in type semiconductor package and a fan-out type semiconductor package will be described in more detail with reference to the accompanying drawings.

Fan-in type semiconductor package

Fig. 3A and 3B are schematic sectional views showing states of the fan-in type semiconductor package before and after being packaged.

Fig. 4 is a schematic sectional view illustrating a packaging process of a fan-in type semiconductor package.

Referring to fig. 3A through 4, the semiconductor chip 2220 may be, for example, an Integrated Circuit (IC) in a bare state, and includes a body 2221 including silicon (Si), germanium (Ge), gallium arsenide (GaAs), etc., connection pads 2222 formed on surfaces of the body 2221 and including a conductive material such as aluminum (Al), etc., and a passivation layer 2223 such as an oxide layer, a nitride layer, etc., formed on surfaces of the body 2221 and covering at least portions of the connection pads 2222, in this case, since the connection pads 2222 may be very small, it may be difficult to mount the Integrated Circuit (IC) on a medium-sized class Printed Circuit Board (PCB) and a main board of an electronic device, etc.

Accordingly, the connection structure 2240 may be formed on the semiconductor chip 2220 to redistribute the connection pads 2222 according to the size of the semiconductor chip 2220, the connection structure 2240 may be formed by forming an insulating layer 2241 on the semiconductor chip 2220 using an insulating material such as a photosensitive dielectric (PID) resin, forming a via hole 2243h to open the connection pads 2222, and then forming a wiring pattern 2242 and a via 2243, then, a passivation layer 2250 to protect the connection structure 2240 may be formed, an opening 2251 may be formed, and an under bump metal layer 2260, etc., that is, a fan-in type semiconductor package 2200 including, for example, the semiconductor chip 2220, the connection structure 2240, the passivation layer 2250, and the under bump metal layer 2260 may be manufactured through series processes.

As described above, the fan-in type semiconductor package may have a package form in which all connection pads (e.g., input/output (I/O) terminals) of the semiconductor chip are disposed inside the semiconductor chip, may have excellent electrical characteristics, and may be produced at low cost. Therefore, many components mounted in smart phones have been manufactured in a fan-in type semiconductor package form. In detail, many elements installed in a smart phone have been developed to achieve fast signal transmission while having a compact size.

However, in the fan-in type semiconductor package, since all the I/O terminals need to be disposed inside the semiconductor chip, the fan-in type semiconductor package has a large spatial limitation. Therefore, it is difficult to apply this structure to a semiconductor chip having a large number of I/O terminals or a semiconductor chip having a compact size. In addition, due to the above disadvantages, it may not be possible to directly mount and use the fan-in type semiconductor package on the main board of the electronic device. The reason is that, even in the case where the size of the I/O terminals of the semiconductor chip and the pitch between the I/O terminals of the semiconductor chip are increased by the redistribution process, the size of the I/O terminals of the semiconductor chip and the pitch between the I/O terminals of the semiconductor chip may not be sufficient to directly mount the fan-in type semiconductor package on the main board of the electronic device.

Fig. 5 is a schematic sectional view showing a case where a fan-in type semiconductor package is mounted on a printed circuit board and is finally mounted on a main board of an electronic device.

Fig. 6 is a schematic sectional view showing a case where a fan-in type semiconductor package is embedded in a printed circuit board and finally mounted on a main board of an electronic device.

Referring to fig. 5 and 6, in the fan-in type semiconductor package 2200, connection pads 2222 (i.e., I/O terminals) of the semiconductor chip 2220 may be redistributed by the printed circuit board 2301, and the fan-in type semiconductor package 2200 may be finally mounted on the main board 2500 of the electronic device in a state where the fan-in type semiconductor package 2200 is mounted on the printed circuit board 2301. In this case, the solder balls 2270 and the like may be fixed by the underfill resin 2280 and the like, and the outside of the semiconductor chip 2220 may be covered with the molding material 2290 and the like. Alternatively, the fan-in type semiconductor package 2200 may be embedded in a separate printed circuit board 2302, the connection pads 2222 (i.e., I/O terminals) of the semiconductor chip 2220 may be redistributed through the printed circuit board 2302 in a state where the fan-in type semiconductor package 2200 is embedded in the printed circuit board 2302, and the fan-in type semiconductor package 2200 may be finally mounted on the main board 2500 of the electronic device.

As described above, it may be difficult to directly mount and use the fan-in type semiconductor package on the main board of the electronic device. Accordingly, the fan-in type semiconductor package may be mounted on a separate printed circuit board and then mounted on the main board of the electronic device through a packaging process, or the fan-in type semiconductor package may be mounted and used on the main board of the electronic device in a state in which the fan-in type semiconductor package is embedded in the printed circuit board.

Fan-out type semiconductor package

Fig. 7 is a schematic sectional view showing a fan-out type semiconductor package.

Referring to fig. 7, in the fan-out type semiconductor package 2100, for example, the outside of a semiconductor chip 2120 may be protected by an encapsulant 2130, and connection pads 2122 of the semiconductor chip 2120 may be redistributed to the outside of the semiconductor chip 2120 by connection structures 2140 in this case, a passivation layer 2150 may be further formed on connection structures 2140, and an under bump metal layer 2160 may be further formed in an opening of passivation layer 2150, solder balls 2170 may be further formed on under bump metal layer 2160, the semiconductor chip 2120 may be an Integrated Circuit (IC) including a body 2121, connection pads 2122, etc., the connection structures 2140 may include an insulating layer 2141, a redistribution layer 2142 formed on insulating layer 2141, and vias 2143 electrically connecting the connection pads 2122 and redistribution layer 2142 to each other.

In addition, , the fan-out type semiconductor package has a form in which the I/O terminals of the semiconductor chip are redistributed by the connection structures formed on the semiconductor chip and are disposed outside the semiconductor chip, as described below.

Fig. 8 is a schematic sectional view showing a case where the fan-out type semiconductor package is mounted on a main board of an electronic device.

Referring to fig. 8, the fan-out type semiconductor package 2100 may be mounted on the main board 2500 of the electronic device by solder balls 2170 or the like. That is, as described above, the fan-out type semiconductor package 2100 includes the connection structure 2140, the connection structure 2140 is formed on the semiconductor chip 2120 and enables the connection pads 2122 to be redistributed to the fan-out region outside the size of the semiconductor chip 2120, so that the standardized ball layout can be used as it is in the fan-out type semiconductor package 2100. As a result, the fan-out type semiconductor package 2100 can be mounted on the main board 2500 of the electronic device without using a separate printed circuit board or the like.

As described above, since the fan-out type semiconductor package can be mounted on the main board of the electronic device without using a separate printed circuit board, the fan-out type semiconductor package can be implemented in a thickness smaller than that of the fan-in type semiconductor package using the printed circuit board. Therefore, the fan-out type semiconductor package can be miniaturized and slimmed. In addition, the fan-out type semiconductor package has excellent thermal and electrical characteristics, making it particularly suitable for mobile products. Accordingly, the fan-out type semiconductor package can be realized in a more compact form than a general Package On Package (POP) type form using a Printed Circuit Board (PCB), and a problem due to the occurrence of a warpage phenomenon can be solved.

In addition, the fan-out type semiconductor package refers to a packaging technique for mounting a semiconductor chip on a main board or the like of an electronic device and protecting the semiconductor chip from external impact as described above, and is a concept different from that of a Printed Circuit Board (PCB), such as a printed circuit board or the like having a specification, a use, or the like different from that of the fan-out type semiconductor package and having a fan-in type semiconductor package embedded therein.

Hereinafter, the under bump metallurgy may be omitted. However, in a similar manner to the case where the under bump metal layer is provided, a fan-out type semiconductor package capable of ensuring excellent interface adhesion and reliability will be described with reference to the drawings.

Fig. 9 is a schematic sectional view showing an example of a fan-out type semiconductor package.

Fig. 10 is a schematic plan view taken along line I-I' of the fan-out type semiconductor package of fig. 9.

Referring to fig. 9, a fan-out type semiconductor package 100A according to an exemplary embodiment may include a frame 110 having a through hole 110H, a semiconductor chip 120 disposed in the through hole 110H of the frame 110 and having an active surface on which a connection pad 122 is disposed and an inactive surface disposed opposite to the active surface, an encapsulant 130 covering at least portions of each of the frame 110 and the semiconductor chip 120 and filling at least portions of the through hole 110H, a connection structure 140 disposed on the active surfaces of the frame 110 and the semiconductor chip 120 and including redistribution layers 142a and 142b electrically connected to the connection pad 122, and a passivation layer 150 disposed on the connection structure 140 and covering at least portions of a lowermost redistribution layer 142b of the redistribution layers 142a and 142b, a surface roughness of a lower surface of the lowermost redistribution layer 142b covered by the passivation layer 150 may be greater than a surface roughness of an upper surface opposite to the lower surface, in this case, a surface (e.g., a lower surface) of the lowermost redistribution layer 142b is disposed on a surface (e.g., the lower surface) of the lowermost redistribution layer 142b, a surface roughness of which may be formed with a surface treatment P, and a surface treatment layer P, a surface treatment layer 34 may be formed to cover at least a plurality of surface treatment layers P, and P, P treatment layers P, P19 may be disposed on a surface treatment layer P, and P treatment layer P may be disposed to cover a surface treatment layer P, and P treatment layer P.

In addition, in the case of a semiconductor package, an under bump metallurgy layer is generally formed at the lowermost side of a redistribution layer to connect solder balls, in the case of a package having a tape size, scratches may occur on a surface on which the under bump metallurgy layer is formed during a memory stacking process such as a NAND flash memory.

In another aspect, in the case of the fan-out type semiconductor package 100A according to the example, before forming the surface treatment layer P such as nickel (Ni)/gold (Au), a relatively strong roughness treatment is performed on the surface of the lowermost redistribution layer 142b, then, the surface treatment layer P is formed on the treatment surface of the lowermost redistribution layer 142 b.

In another aspect, the lowermost redistribution layer 142b may include a copper (Cu) layer, and the surface treatment layer P may include a nickel (Ni) layer disposed on the copper (Cu) layer of the lowermost redistribution layer 142b as the conductor layer P1, and a gold (Au) layer disposed on the nickel (Ni) layer as the second conductor layer P2. in this case, the nickel (Ni) layer has an asperity corresponding to a surface roughness of the copper (Cu) layer, and the gold (Au) layer has an asperity corresponding to an asperity of the nickel (Ni) layer. for example, a surface roughness of the surface of the lowermost redistribution layer 142b (e.g., a surface roughness of the copper (Cu) layer) may be 1 μm to 3 μm, preferably, may exceed 1 μm and may be equal to or less than 3 μm. thus, the surface treatment layer P (e.g., each of the nickel (Ni) layer P1 and the gold (Au) layer P2) may also have a roughness of 1 μm to 3 μm, and may be measured using a centerline roughness average Ra, and is referred to herein as Ra.

In addition, the thickness of the lowermost redistribution layer 142b (e.g., the thickness of the copper (Cu) layer) may be thicker than the thickness of the surface treatment layer P (e.g., the thickness of each of the nickel (Ni) layer as the th conductor layer P1 and the gold (Au) layer as the second conductor layer P2).

Hereinafter, each component included in the fan-out type semiconductor package 100A according to an exemplary embodiment will be described in more detail.

The frame 110 may improve rigidity of the fan-out type semiconductor package 100A according to a specific material and serves to ensure uniformity of thickness of the encapsulant 130. When a wiring layer, a wiring via, or the like is formed in the frame 110 (which will be described later), the fan-out type semiconductor package 100A may be used as a Package On Package (POP) type package. The frame 110 may have a through hole 110H. The semiconductor chip 120 may be disposed in the through hole 110H to be separated from the frame 110 by a predetermined distance. The side surface of the semiconductor chip 120 may be surrounded by the frame 110. However, this form is merely an example and various modifications may be made to have other forms and other functions may be performed according to this form.

In this case, the insulating material may be a material suitable for the core layer, for example, a thermosetting resin such as an epoxy resin, a thermoplastic resin such as a polyimide resin, a resin (specifically, a prepreg) in which a thermosetting resin or a thermoplastic resin is mixed with an inorganic filler or a thermosetting resin or a thermoplastic resin is impregnated in a core material such as glass fiber (or glass cloth) together with the inorganic filler , but is not limited thereto.

The semiconductor chip 120 may be an Integrated Circuit (IC) configured to integrate hundreds to millions or more elements in a single chip, in which case the IC may be, for example, a processor chip such as a central processing unit (e.g., a Central Processing Unit (CPU)), a graphics processor (e.g., a Graphics Processor Unit (GPU)), a field programmable array (FPGA), a digital signal processor, a crypto processor, a microprocessor, a microcontroller, or the like, and particularly, an Application Processor (AP).

The semiconductor chip 120 may be formed on an active wafer basis. In this case, the base material of the body 121 of the semiconductor chip 120 may be silicon (Si), germanium (Ge), gallium arsenide (GaAs), or the like. Various circuits may be formed on the body 121. The connection pads 122 may electrically connect the semiconductor chip 120 to other components. The material of each of the connection pads 122 may be a conductive material, such as aluminum (Al), or the like. A passivation layer 123 exposing the connection pad 122 may be formed on the body 121 and may be an oxide layer, a nitride layer, or the like, or a double layer of an oxide layer and a nitride layer. The lower surface of the connection pad 122 may have a step (or step difference) with respect to the lower surface of the encapsulant 130 through the passivation layer 123. Accordingly, the encapsulant 130 may be prevented from leaking to the lower surface of the connection pad 122. Insulating layers (not shown) and the like may also be provided at other desired positions. The semiconductor chip 120 may be a die, but if necessary, a redistribution layer (not shown) may also be formed on the active surface of the semiconductor chip 120, or the semiconductor chip 120 may be a package type in which bumps (not shown) or the like are connected to the connection pads 122.

The encapsulant 130 may protect the frame 110, the semiconductor chip 120, etc. the encapsulation form of the encapsulant 130 is not particularly limited, but may be a form in which the encapsulant 130 surrounds at least portions of the frame 110, the semiconductor chip 120, etc. in this case, the encapsulant 130 may cover inactive surfaces of the frame 110 and the semiconductor chip 120 and fill a space between a wall surface of the through-hole 110H and a side surface of the semiconductor chip 120. furthermore, the encapsulant 130 may fill at least portions of a space between the passivation layer 123 of the semiconductor chip 120 and the connection structure 140. furthermore, the encapsulant 130 may fill the through-hole 110H, thereby functioning as an adhesive and reducing the warpage of the semiconductor chip 120 according to a specific material.

In this case, the insulating material may be a thermosetting resin such as an epoxy resin, a thermoplastic resin such as a polyimide resin, a resin in which a thermosetting resin or a thermoplastic resin is mixed with an inorganic filler, or a resin in which a thermosetting resin or a thermoplastic resin is impregnated with an inorganic filler in a core material such as glass fiber (or glass cloth) (e.g., prepreg, ABF, FR-4, BT, etc.).

The connection structures 140 may redistribute the connection pads 122 of the semiconductor chip 120. Tens to hundreds of connection pads 122 of the semiconductor chip 120 having various functions may be redistributed by the connection structure 140 and may be physically or electrically connected to the outside through the electrical connection structure 160 according to the function. The connection structure 140 may include insulating layers 141a and 141 b; redistribution layers 142a and 142b disposed on the insulating layers 141a and 141b, respectively; and connection vias 143a and 143b penetrating the insulating layers 141a and 141b, respectively, and connected to the redistribution layers 142a and 142b, respectively. Each of the insulating layers 141a and 141b, the redistribution layers 142a and 142b, and the connection vias 143a and 143b may be configured in a number greater than that shown in the drawing, or may include only a single layer.

The material of the insulating layers 141a and 141b may be an insulating material. In addition to the insulating material described above, the insulating material may also be a photosensitive insulating material, such as a photosensitive dielectric (PID) material. In this case, the insulating layers 141a and 141b are formed to have a smaller thickness, and a fine pitch of the connection vias 143a and 143b can be more easily achieved. The materials of the insulating layers 141a and 141b may be the same as or different from each other.

The redistribution layers 142a and 142b may be substantially used to redistribute the connection pads 122, and a material forming the same may be a conductive material such as copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), titanium (Ti), or an alloy thereof. Redistribution layers 142a and 142b may perform various functions depending on the design of the respective layers. For example, the redistribution layer may include a Ground (GND) pattern, a Power (PWR) pattern, a signal (S) pattern, and the like. Here, the signal (S) pattern may include various signal patterns such as a data signal pattern, etc., in addition to a Ground (GND) pattern, a Power (PWR) pattern, etc. Additionally, the redistribution layer may include via pads, electrical connection structure pads, and the like.

The surface treatment layer P may include a plurality of conductor layers P1 and P2. the lowermost redistribution layer 142b may include a copper (Cu) layer according to the related art, and each of the conductor layers P1 and P2 may be a nickel (Ni) layer and a gold (Au) layer, but is not limited thereto.through a relatively strong roughness treatment, the surface roughness of the th surface of the lowermost redistribution layer 142b may be greater than the surface roughness of the opposite second surface thereof, for example, the th surface of the lowermost redistribution layer may have a surface roughness of 1 μm to 3 μm, preferably, a surface roughness of more than 1 μm and equal to or less than 3 μm.

In addition, if the surface roughness of the lowermost redistribution layer 142b (e.g., a copper (Cu) layer) is less than 1 μm, the surface treatment layer P may have difficulty in having a significant degree of concavity and convexity, if the surface roughness of the lowermost redistribution layer 142b exceeds 3 μm, the surface treatment layer P (e.g., a nickel (Ni) layer and a gold (Au) layer) may have difficulty in growing, in a similar manner, if the th conductor layer P1 (e.g., a nickel (Ni) layer) has a degree of concavity and convexity less than 1 μm, the second conductor layer P2 may have difficulty in having a significant degree of concavity and convexity, if the nickel (Ni) layer has a degree of concavity and convexity more than 3 μm, the growth of the second conductor layer P2 (e.g., a gold (Au) layer) may have a problem, further, if the second conductor layer P2 (e.g., a gold (Au) layer) has a degree of concavity and convexity less than 1 μm, then it may be difficult to improve the adhesion, further, the th conductor layer P1 (e.g., a nickel (Ni) layer has a degree of convexity and convexity less than 3 μm, preferably, if the second conductor layer P2 has a degree of convexity and less than 3 μm.

In addition, the thickness of the lowermost redistribution layer 142b (e.g., the thickness of the copper (Cu) layer) may be thicker than the thickness of the surface treatment layer P (e.g., the thickness of each of the nickel (Ni) layer as the th conductor layer P1 and the gold (Au) layer as the second conductor layer P2.) when the thickness of the copper (Cu) layer is thicker, the nickel (Ni) layer and the gold (Au) layer have the concavity and convexity corresponding to the surface roughness of the copper (Cu) layer, similarly, the thickness of the nickel (Ni) layer may be thicker than the thickness of the gold (Au) layer the thickness of the copper (Cu) layer may be 5 to 7 μm, the thickness of the nickel (Ni) layer may be 3 to 5 μm, and the thickness of the gold (Au) layer may be 0.5 to 1 μm.

In another aspect, the lowermost redistribution layer 142b on which the surface treatment layer P is formed as described above may be a pad for connection with the electrical connection structure 160 (to be described later).

The connection vias 143a and 143b may electrically connect the redistribution layers 142a and 142b and the connection pads 122 and the like formed on different layers to each other, thereby forming an electrical path in the fan-out type semiconductor package 100A. The material connecting each of the vias 143a and 143b may be a conductive material such as copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), titanium (Ti), or an alloy thereof. The connection vias 143a and 143b may be of a fill type or a conformal type, or may have a tapered shape.

The passivation layer 150 may have an opening 151 exposing at least portions of the surface treatment layer P, the opening 151 being formed on the surface of the lowermost redistribution layer 142b of the connection structure 140, the number of the openings 151 formed in the passivation layer 150 may be several tens to several thousands, the material of the passivation layer 150 is not particularly limited, for example, an insulating material may be used as the material of the passivation layer, in which case the insulating material may be a thermosetting resin such as an epoxy resin, a thermoplastic resin such as a polyimide resin, a thermosetting resin or a thermoplastic resin mixed with an inorganic filler, or a resin (e.g., prepreg, ABF, FR-4, BT, etc.) in which the thermosetting resin or the thermoplastic resin is impregnated in a core material such as glass fiber (or glass cloth) together with the inorganic filler .

The electrical connection structure 160 connected to the surface treatment layer P, which has been exposed, may be disposed in the opening 151 of the passivation layer 150. the surface treatment layer P has a concavity and convexity as described above, and thus a concavity and convexity may also be provided in a bonding interface with the electrical connection structure 160. therefore, connection reliability may be excellent, thereby further improving board-level reliability by the electrical connection structure 160 may physically or electrically connect the fan-out type semiconductor package 100A to the outside.

For example, the electrical connection structures 160 may be set to a number of tens to thousands, or may be set to a number of tens to thousands or more, or tens to thousands or less, depending on the number of the connection pads 122 at least of the electrical connection structures 160 may be disposed in a fan-out region.

In addition, although not shown in the drawings, a metal thin film may be formed on the wall surface of the through hole 110H for the purpose of radiating heat and/or shielding electromagnetic waves, if necessary. Further, if necessary, a plurality of semiconductor chips 120 performing the same or different functions from each other may be provided in the through-hole 110H. In addition, if necessary, a separate passive component such as an inductor, a capacitor, or the like may be provided in the via hole 110H. Further, if necessary, a plurality of through holes 110H may be provided, and the semiconductor chip 120 and/or the passive components may be provided in each of the plurality of through holes. In addition, if necessary, passive components such as Surface Mount Technology (SMT) components including, for example, inductors, capacitors, and the like, may be disposed on the surface of the passivation layer 150.

Fig. 11A and 11B are schematic process diagrams illustrating a manufacturing example of the fan-out type semiconductor package of fig. 9.

Referring to fig. 11A, a through hole 110H is first formed in a frame 110, the frame 110 is attached to a tape 210, a semiconductor chip 120 is disposed in the through hole 110H in a face-down form, then attached to the tape 210, and the frame 110 and the semiconductor chip 120 are encapsulated by an encapsulant 130. then, the tape 210 is removed, and a connection structure 140 including insulating layers 141A and 141b, redistribution layers 142a and 142b, and connection vias 143a and 143b may be formed in an area where the tape 210 is removed.

Referring to fig. 11B, a surface treatment layer P may then be formed on the lower surface of the lowermost redistribution layer 142B where the surface roughness is formed, the surface treatment layer P may be formed using electroless nickel plating/displacement gold plating, etc. the formed surface treatment layer P may include a plurality of conductor layers P1 and P2, the conductor layers P1 and P2 may be a nickel (Ni) layer and a gold (Au) layer in sequence, and may have a degree of concavity and convexity corresponding to the surface roughness of the lower surface of the lowermost redistribution layer 142B, since the surface treatment layer P is relatively thin and no planarization process is performed on the surface treatment layer P, the surface roughness of the lower surface of the lowermost redistribution layer 142B may be transferred to the surface of the surface treatment layer P, the degree of surface roughness of the lower surface of the surface treatment layer P may be less than or equal to the degree of surface roughness of the lower surface of the lowermost redistribution layer 142B, the present disclosure is not limited thereto, for example, the degree of surface roughness of the lower surface treatment layer P may be greater than the degree of surface roughness of the lower surface treatment layer P142B may be formed on the lower surface treatment layer P connection structure P150, and the passivation layer P may be formed using a series of passivation layer P bonding processes such as a passivation layer 150, and a passivation layer 150 may be formed according to the excellent bonding process, and a passivation layer P may be formed according to the case of a series of passivation layer P processing, abp 150.

Fig. 12 is a schematic cross-sectional view illustrating another example of a fan-out semiconductor package.

Referring to fig. 12, in a fan-out type semiconductor package 100B according to another example, a frame 110 may include a insulating layer 111a, a th wiring layer 112a embedded in the th insulating layer 111a to expose a lower surface, a second wiring layer 112B disposed on an upper surface of the th insulating layer 111a, a second insulating layer 111B disposed on an upper surface of the th insulating layer 111a and covering the second wiring layer 112B, and a third wiring layer 112c disposed on an upper surface of the second insulating layer 111B, the wiring layer 112a, the second wiring layer 112B, and the third wiring layer 112c are electrically connected to the connection pad 122, the th wiring layer 112a and the second wiring layer 112B, and the second wiring layer 112B and the third wiring layer 112c may be electrically connected to each other through an th wiring via 113a penetrating the th insulating layer 111a and a second wiring via 113B penetrating the second insulating layer 111B, respectively.

When the th wiring layer 112a is embedded in the th insulating layer 111a, a step (or step difference) due to the thickness of the th wiring layer 112a may be significantly reduced, and thus the insulating distance of the connection structure 140 may become constant in other words, a difference between the distance from the uppermost redistribution layer 142a of the connection structure 140 to the lower surface of the th insulating layer 111a and the distance from the uppermost redistribution layer 142a of the connection structure 140 to the connection pad 122 of the semiconductor chip 120 may be smaller than the thickness of the th wiring layer 112a, and thus, a high-density wiring design of the connection structure 140 may be easily performed.

The th wiring layer 112a may be recessed to the inside of the th insulating layer 111a as described above, when the th wiring layer 112a is recessed to the inside of the th insulating layer and a step (or a step difference) is provided between the lower surface of the th insulating layer 111a and the lower surface of the th wiring layer 112a, the th wiring layer 112a may be prevented from being contaminated due to bleeding of a forming material of the encapsulant 130.

The thickness of each of the wiring layers 112a, 112b, and 112c of the frame 110 may be greater than the thickness of each of the redistribution layers 142a and 142b of the connection structure 140 the thickness of the frame 110 may be greater than the thickness of the semiconductor chip 120, and thus, the wiring layers 112a, 112b, and 112c may also be formed in a larger size to match the scale of the frame 110, and in another aspect, the redistribution layers 142a and 142b of the connection structure 140 may be formed in a relatively smaller size to be slimmed than the size of the wiring layers 112a, 112b, and 112 c.

In this case, the insulating material may be a thermosetting resin such as an epoxy resin, a thermoplastic resin such as a polyimide resin, a resin in which a thermosetting resin or a thermoplastic resin is mixed with an inorganic filler, or a resin in which a thermosetting resin or a thermoplastic resin is impregnated with an inorganic filler in a core material such as glass fiber (or glass cloth) (e.g., prepreg, ABF, FR-4, BT, etc.).

The wiring layers 112a, 112b, and 112c may be used to redistribute the connection pads 122 of the semiconductor chip 120. The material of each of the wiring layers 112a, 112b, and 112c may be a conductive material such as copper (Cu), aluminum (Al), silver (Ag), tin (Sn), gold (Au), nickel (Ni), lead (Pb), titanium (Ti), or an alloy thereof. The wiring layers 112a, 112b, and 112c may perform various functions according to the design of the respective layers. For example, the wiring layer may include a Ground (GND) pattern, a Power (PWR) pattern, a signal (S) pattern, and the like. Here, the signal (S) pattern may include various signal patterns such as a data signal pattern, etc., in addition to a Ground (GND) pattern, a Power (PWR) pattern, etc. Additionally, routing layers may include routing via pads, wire pads, electrical connection structure pads, and the like.

The wiring vias 113a and 113b may electrically connect the wiring layers 112a, 112b, and 112c formed on different layers to each other, thereby forming an electrical path in the frame 110. The material of each of the routing vias 113a and 113b may be a conductive material. Each of the routing vias 113a and 113b may be completely filled with a conductive material, or a conductive material may also be formed along a wall surface of each of the routing vias. Each of the wire vias may have all shapes known in the art, such as a tapered shape, a cylindrical shape, and the like.

In this regard, it may be advantageous in a process in which the th routing via 113a has a tapered shape in which the width of the upper surface is greater than the width of the lower surface, in this case, the th routing via 113a may be integrated with the pad pattern of the second routing layer 112b, in a process in which the hole for the second routing via 113b is formed, the th pad of the second routing layer 112b may be used as a stopper.

The surface treatment layer PP may be disposed on the third wiring layer 112c, and the surface treatment layer PP may be exposed through the opening 131 penetrating the encapsulant 130. The surface treatment layer PP may be a multilayer of nickel (Ni)/gold (Au), but is not limited thereto.

Other components (for example, other components described with reference to fig. 9 to 11) may also be applied to the fan-out type semiconductor package 100B according to another example, and the detailed description is substantially the same as that described in the above-described fan-out type semiconductor package 100A, and the detailed description will be omitted.

Fig. 13 is a schematic cross-sectional view illustrating another example of a fan-out semiconductor package.

Referring to fig. 13, in a fan-out type semiconductor package 100C according to another example, a frame 110 may include a insulating layer 111a, a 0 wiring layer 112a and a second wiring layer 112b disposed on both sides of a th insulating layer 111a, respectively, a second insulating layer 111b disposed on a lower surface of a insulating layer 111a and covering a th wiring layer 112a, a third wiring layer 112C disposed on a lower surface of the second insulating layer 111b, a third insulating layer 111C disposed on an upper surface of a insulating layer 111a and covering the second wiring layer 112b, a fourth wiring layer 112d disposed on an upper surface of the third insulating layer 111C, a th wiring layer 112a, a second wiring layer 112b, a third wiring layer 112C, and a fourth wiring layer 112d may be electrically connected to a connection pad 122, the connection structure 140 may further be 5-step-thus, the occurrence of defects of the third wiring layer 112a, the third wiring layer 112C, and the fourth wiring layer 112d may be suppressed in a process of forming the connection structure 3877 a via hole 113a, the third wiring layer 112C, the third wiring layer 112a, the third wiring layer 112C, and the fourth wiring layer 112C may be electrically connected to each other via hole 113a via hole 113b, a via hole 113 b.

a thickness of the insulating layer 111a may be greater than a thickness of the second insulating layer 111b and a thickness of the third insulating layer 111c the insulating layer 111a may be substantially relatively thick to maintain rigidity, and the second and third insulating layers 111b and 111c may be introduced to form a greater number of wiring layers 112c and 112d the insulating layer 111a may include an insulating material different from that of the second and third insulating layers 111b and 111c, for example, the th insulating layer 111a may be, for example, a prepreg including a core material, a filler, and an insulating resin, and the second and third insulating layers 111b and 111c may be an ABF film or a PID film including a filler and an insulating resin.

The lower surface of the third wiring layer 112c of the frame 110 may be disposed at a height below the lower surface of the connection pad 122 of the semiconductor chip 120. furthermore, a distance between the th redistribution layer 142a of the connection structure 140 and the third wiring layer 112c of the frame 110 may be smaller than a distance between the th redistribution layer 142a of the connection structure 140 and the connection pad 122 of the semiconductor chip 120. the reason is that the third wiring layer 112c may be disposed on the second insulating layer 111b in a protruded form so as to be in contact with the connection structure 140. the th and second wiring layers 112a and 112b of the frame 110 may be disposed at a height between the active surface and the inactive surface of the semiconductor chip 120. the frame 110 may be formed to have a thickness corresponding to the thickness of the semiconductor chip 120, and thus the th and second wiring layers 112a and 112b formed in the frame 110 may be disposed at a height between the active surface and the inactive surface of the semiconductor chip 120.

The thickness of each of the wiring layers 112a, 112b, 112c, and 112d of the frame 110 may be greater than the thickness of each of the redistribution layers 142a and 142b of the connection structure 140 the thickness of the frame 110 may be greater than the thickness of the semiconductor chip 120 so that the wiring layers 112a, 112b, 112c, and 112d may also be formed in a larger size, and in another aspect, the redistribution layers 142a and 142b of the connection structure 140 may be formed in a relatively smaller size to be slimmed.

The surface treatment layer PP may be disposed on the fourth wiring layer 112d, and the surface treatment layer PP may be exposed through the opening 131 penetrating the encapsulant 130. The surface treatment layer PP may be a multilayer of nickel (Ni)/gold (Au), but is not limited thereto.

Other components (for example, other components described with reference to fig. 9 to 12) may also be applied to the fan-out type semiconductor package 100C according to another example, and the detailed description is substantially the same as that described in the above-described fan-out type semiconductor package 100A, and the detailed description will be omitted.

As described above, according to the exemplary embodiments, the under bump metal layer is omitted, but a fan-out type semiconductor package capable of securing excellent interface adhesiveness and reliability can be provided in a manner similar to the case where the under bump metal layer is provided.

While exemplary embodiments have been shown and described above, it will be apparent to those skilled in the art that modifications and variations can be made without departing from the scope of the invention as defined by the appended claims.