SEMICONDUCTOR PACKAGE STRUCTURE AND METHOD FOR PRODUCING THE SAME

A semiconductor package structure and a method for producing the same are provided. The package structure includes a support substrate, a chip body disposed on the support substrate, a metal lead connected between the support substrate and the chip body, a spacer element disposed on the chip body, and a light-transmitting plate disposed on the chip body through the spacer element. The chip body, the spacer element, and the light-transmitting plate jointly define a closed space. The package structure further includes an encapsulation colloid formed on outsides of the closed space. The encapsulation colloid is formed by curing a liquid resin encapsulant and includes a plurality of first fillers and a plurality of second fillers dispersed therein. Before the liquid resin encapsulant is cured, a sinking rate of each of the second fillers in the liquid resin encapsulant is less than that of each of the first fillers.

CROSS-REFERENCE TO RELATED PATENT APPLICATION

This application claims the benefit of priority to Taiwan Patent Application No. 112128752, filed on Aug. 1, 2023. The entire content of the above identified application is incorporated herein by reference.

FIELD OF THE DISCLOSURE

The present disclosure relates to a package structure, and more particularly to a semiconductor package structure and a method for producing the same.

BACKGROUND OF THE DISCLOSURE

As shown inFIG.1toFIG.3, in the related art, a chip R1, gold wires R2, and a glass R3in a CIS package can be protected through being surrounded by a liquid resin encapsulant R4to prevent these components from being damaged during reliability testing or transportation, thereby avoiding functional failure of a product.

However, during a curing process for the liquid resin encapsulant R4of the CIS package, a viscosity of the liquid resin encapsulant R4changes along with changes in temperature. Accordingly, fillers FP originally added in the liquid resin encapsulant R4may sink downward due to the viscosity of the liquid resin encapsulant R4becoming low and a gravity sedimentation of the fillers, or due to a long resting time. Therefore, after the liquid resin encapsulant R4is cured, the fillers FP may partially separate from a top portion of the encapsulant R4located at a junction of the highest point of the glass R3and the encapsulant R4, and this phenomenon can be referred to as filler segregation, as illustrated inFIG.2. As a result, there is no distribution of the fillers FP at the junction of the highest point of the glass R3and the encapsulant R4.

The above-mentioned phenomenon of filler segregation can easily cause cracks C on the glass R3of the CIS package during a reliability test (e.g., a temperature cycle reliability test), thereby causing the finished product to fail the reliability test, as shown inFIG.3.

SUMMARY OF THE DISCLOSURE

In response to the above-referenced technical inadequacies, the present disclosure provides a semiconductor package structure and a method for producing the same, which can effectively improve the phenomenon of filler separation to avoid cracking of glass.

In order to solve the above-mentioned problems, one of the technical aspects adopted by the present disclosure is to provide a semiconductor package structure including a support substrate, a chip body, a metal lead, a spacer element, a light-transmitting plate, and an encapsulation colloid. The chip body is disposed on a side surface of the support substrate. The metal lead is connected between the support substrate and the chip body. The spacer element is disposed on a side surface of the chip body. The light-transmitting plate is disposed on the chip body through the spacer element. The chip body, the spacer element, and the light-transmitting plate jointly define a closed space. The encapsulation colloid is formed on the support substrate to cover outsides of the chip body, the spacer element, and the light-transmitting plate relative to the closed space, and to cover the metal lead. The encapsulation colloid is formed by curing a liquid resin encapsulant. The encapsulation colloid includes a plurality of first fillers and a plurality of second fillers dispersed therein. Material properties of the plurality of first fillers and the plurality of second fillers meet the following conditions. Before the liquid resin encapsulant is cured, a sinking rate of each of the first fillers in the liquid resin encapsulant is defined as a first sinking rate, a sinking rate of each of the second fillers in the liquid resin encapsulant is defined as a second sinking rate, and the second sinking rate is less than the first sinking rate.

In order to solve the above-mentioned problems, another one of the technical aspects adopted by the present disclosure is to provide a method for producing a semiconductor package structure, including: providing a support substrate; disposing a chip body on a side surface of the support substrate; connecting a metal lead between the support substrate and the chip body; disposing a spacer element on a side surface of the chip body; disposing a light-transmitting plate on the chip body through the spacer element, in which the chip body, the spacer element, and the light-transmitting plate jointly define a closed space; and forming an encapsulation colloid on the support substrate to cover outsides of the chip body, the spacer element, and the light-transmitting plate relative to the closed space, in which the encapsulation colloid covers the metal lead.

Moreover, the encapsulation colloid is formed by curing a liquid resin encapsulant, and the encapsulation colloid includes a plurality of first fillers and a plurality of second fillers dispersed therein. Material properties of the plurality of first fillers and the plurality of second fillers meet the following conditions. Before the liquid resin encapsulant is cured, a sinking rate of each of the first fillers in the liquid resin encapsulant is defined as a first sinking rate, a sinking rate of each of the second fillers in the liquid resin encapsulant is defined as a second sinking rate, and the second sinking rate is less than the first sinking rate.

Therefore, in the semiconductor package structure and the method for producing the same provided by the present disclosure, through the design of material properties of the first fillers and the second fillers in the encapsulation colloid, the distribution of the first fillers and the second fillers in the encapsulation colloid can be effectively improved, and glass cracks caused by the filler separation can be effectively avoided.

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

First Embodiment

Referring toFIG.4andFIG.5, a first embodiment of the present disclosure provides a semiconductor package structure100A, which can be, for example, a semiconductor package structure for a complementary metal oxide semiconductor (CMOS) image sensor (e.g., a CIS packaging structure), but the present disclosure is not limited thereto.

The semiconductor package structure100A of the embodiment of the present disclosure can effectively improve the technical problem of glass breakage caused by filler separation.

Furthermore, the semiconductor package structure100A includes a support substrate1, a chip body2, a plurality of metal leads3, a spacer element4, a light-transmitting plate5, and an encapsulation colloid6.

The support substrate1can be, for example, a plastic substrate or a ceramic substrate, and the support substrate1can be formed with a circuit pattern11.

The chip body2is disposed on a side surface of the support substrate1(e.g., an upper surface of the support substrate1as shown inFIG.4). Further, the semiconductor package structure100A can include a plurality of conductive pins12disposed on another side surface of the support substrate1(e.g., a lower surface of the support substrate1shown inFIG.4).

In addition, the semiconductor package structure100A further includes at least one sensing chip21(e.g., a CMOS sensing chip) disposed on a side surface of the chip body2away from the support substrate1. The plurality of conductive pins12are electrically connected to the circuit pattern11and the sensing chip21to transmit electronic signals to an external device.

Two connecting portions31at both ends of each of the metal leads3are respectively connected to the support substrate1and the chip body2. Accordingly, the support substrate1and the chip body2can be electrically connected to each other through the plurality of metal leads3.

In some embodiments of the present disclosure, each of the metal leads3can be, for example, a gold wire, a copper wire, a conductive wire formed by mixing gold and palladium, or a conductive wire formed by mixing gold and other trace metals.

The spacer element4can be, for example, in an annular shape (e.g., a square annular shape or a circular annular shape).

The spacer element4is disposed on a side surface of the chip body2away from the support substrate1, and the spacer element4is disposed to surround the sensing chip21. A material of the spacer element4can be, for example, glass or plastic (e.g., a polyimide resin, an amide resin, an epoxy resin, or a liquid crystal polymer).

The light-transmitting plate5is disposed at intervals on the chip body2through the spacer element4. The chip body2, the spacer element4, and the light-transmitting plate5together form a closed space SP. The sensing chip21is located inside the closed space SP, and the metal leads are located outside of the closed space SP.

The light-transmitting plate5can be, for example, a light-transmitting glass plate or a light-transmitting plastic plate (e.g., an acrylic resin plate or other light-transmitting plastic plate). Accordingly, a sensing signal from outside can penetrate the light-transmitting plate5and be received by the sensing chip21located inside the closed space SP.

As shown inFIG.4andFIG.5, the encapsulation colloid6is formed on the support substrate1to cover outsides of the chip body2, the spacer element4, and the light-transmitting plate5relative to the closed space SP. Further, the encapsulation colloid6covers and encapsulates the plurality of metal lead2therein.

The encapsulation colloid6can be formed by curing a liquid resin encapsulant. The liquid resin encapsulant can be, for example, at least one of an epoxy resin encapsulant, a silicone resin encapsulant, and a polyurethane resin encapsulant. Furthermore, the liquid resin encapsulant can be, for example, formed on the support substrate1by glue dispensing to cover the outer surface(s) defining the closed space SP, but the present disclosure is not limited thereto.

The encapsulation colloid6can, for example, fully cover outside walls of the chip body2, the spacer element4, and the light-transmitting plate5, and a top surface of the light-transmitting plate5is exposed to an external environment and is not covered by the encapsulation colloid6.

In the present embodiment, a colloid thickness of the encapsulation colloid6on the support substrate1gradually decreases from a direction close to and away from the chip body2, the spacer element4, and the light-transmitting plate5. From another perspective, a colloid surface61of the encapsulation colloid6is a flat inclined surface that slopes downward toward an outside (i.e., an external environment) from a connection point with the light-transmitting plate5, but the present disclosure is not limited thereto. The colloid surface61of the encapsulation colloid6can also be, for example, a concave curved surface that slopes downward toward the outside.

In the present embodiment, the encapsulation colloid6fully covers the outside wall51of the light-transmitting plate5, and an angle α between the colloid surface61of the encapsulation colloid6and the outside wall51of the light-transmitting plate5is an acute angle, which is an included angle less than 90 degrees, for example, an included angle of 30 to 60 degrees, but the present disclosure is not limited thereto.

Furthermore, the encapsulation colloid6includes a plurality of first fillers FP11and a plurality of second fillers FP12dispersed therein.

In the present embodiment, material properties of the plurality of first fillers FP11and the plurality of second fillers FP12meet following conditions.

Before the liquid resin encapsulant is cured (i.e., the liquid resin encapsulant being in a flowable state), a sinking rate of each of the first fillers FP11in the liquid resin encapsulant is defined as a first sinking rate, a sinking rate of each of the second fillers FP12in the liquid resin encapsulant is defined as a second sinking rate, and the second sinking rate of each of the second fillers FP12is less than the first sinking rate of each of the first fillers FP11.

From another perspective, when the first fillers FP11and the second fillers FP12sink in the liquid resin encapsulant, the first fillers FP11have a lower sinking resistance so as to sink faster than the second fillers FP12. Therefore, each of the first fillers FP11has the first sinking rate greater than the second sinking rate. Furthermore, when the first fillers FP11and the second fillers FP12sink in the liquid resin encapsulant, the second fillers FP12have a higher sinking resistance so as to sink slower than the first fillers FP11. Therefore, each of the second fillers FP12has the second sinking rate less than the first sinking rate.

Accordingly, since the first sinking rate of each of the first fillers FP11is greater than the second sinking rate of each of the second fillers FP12, the plurality of first fillers FP11may sink quickly and be mostly distributed in a lower half part62of the encapsulation colloid6, and the plurality of second fillers FP12may sink slowly and be mostly distributed in an upper half part63of the encapsulation colloid6. A portion of the upper half part63of the encapsulation colloid6sandwiched by the colloid surface61and the outside wall51of the light-transmitting plate5is defined as a top edge area, and at least part of the plurality of second fillers FP12is dispersed in the top edge area of the encapsulation colloid6.

Accordingly, the second fillers FP12can be at least partially distributed at the highest point of intersection between the encapsulation colloid6and the light-transmitting plate5, so that the problem of glass breakage caused by filler separation can be improved.

In some embodiments of the present disclosure, in the encapsulation colloid6, at least 65%, preferably at least 70%, and more preferably at least 75% of the plurality of first fillers FP11are distributed in the lower half part62of the encapsulation colloid6.

In addition, at least 65%, preferably at least 70%, and more preferably at least 75% of the plurality of second fillers FP12are distributed in the upper half part63of the encapsulation colloid6.

In other words, the plurality of first fillers FP11and the plurality of second fillers FP12have different distribution positions due to differences in sinking rates. The plurality of first fillers FP11and the plurality of second fillers FP12are not evenly distributed in the encapsulation colloid6.

A thickness of the encapsulation colloid6from the side surface (i.e., the upper surface) of the support substrate1to a top edge (i.e., a top surface) of the light-transmitting plate5is defined as a maximum thickness Tmax. The lower half part62of the encapsulation colloid6is defined by a part of the encapsulation colloid6covering from the upper surface of the support substrate1to half of the maximum thickness Tmax. The upper half part63of the encapsulation colloid6is defined by a remaining part of the encapsulation colloid6located above the lower half part62, but the present disclosure is not limited thereto.

Furthermore, in the first embodiment of the present disclosure, each of the first fillers FP11has a first density, each of the second fillers FP12has a second density, and the first density of each of the first fillers FP11is greater than the second density of each of the second fillers FP12.

In addition, the first density of each of the first fillers FP11and the second density of each of the second fillers FP12are both greater than a density of the liquid resin encapsulant.

Accordingly, since each of the first fillers FP11has the first density greater than the second density, when the first fillers FP11sink downward in the liquid resin encapsulant, the first fillers FP11have less sinking resistance and may sink faster than the second fillers FP12. Therefore, each of the first fillers FP11has the first sinking rate greater than the second sinking rate.

In other words, since each of the second fillers FP12has the second density less than the first density, when the second fillers FP12sink downward in the liquid resin encapsulant, the second fillers FP12have larger sinking resistance and may sink slower than the first fillers FP11. Therefore, each of the second fillers FP12has the second sinking rate less than the first sinking rate.

In some embodiments of the present disclosure, the first density of each of the first fillers FP11can be, for example, between 3 g/cm3and 10 g/cm3, and preferably between 3 g/cm3and 7 g/cm3. The second density of each of the second fillers FP12can be, for example, between 1 g/cm3and 3 g/cm3, and preferably between 2 g/cm3and 3 g/cm3. Furthermore, an absolute value of a difference between the first density of each of the first fillers FP11and the second density of each of the second fillers FP12is not less than 1 g/cm3, but the present disclosure is not limited thereto.

In some embodiments of the present disclosure, each of the first fillers FP11can be selected from the group consisting of: silicon dioxide particles, silicon carbide particles, silicon nitride particles, rubber particles, and composite particles composed of metal and rubber. Each of the second fillers FP12can be selected from the group consisting of: silicon dioxide particles, silicon carbide particles, silicon nitride particles, rubber particles, and composite particles composed of metal and rubber.

It should be noted that the material of each of the first fillers FP11and the material of each of the second fillers FP12can be the same as each other or different from each other, and the present disclosure is not limited thereto.

A particle size (e.g., an average particle size D50) of each of the first fillers FP11can be, for example, between 5 micrometers and 50 micrometers, and preferably between 5 micrometers and 20 micrometers. In addition, a particle size of each of the second fillers FP12can be, for example, between 5 micrometers and 35 micrometers, and preferably between 5 micrometers and 15 micrometers. It should be noted that the particle size of each of the first fillers FP11and the particle size of each of the second fillers FP12can be the same as each other or different from each other, and the present disclosure is not limited thereto.

In some embodiments of the present disclosure, based on a total weight of the encapsulation colloid6being 100 wt %, a first weight percentage concentration of the plurality of first fillers FP11in the encapsulation colloid6is between 5 wt % and 15 wt %, and preferably between 5 wt % and 10 wt %.

In addition, a second weight percentage concentration of the plurality of second fillers FP12in the encapsulation colloid6is between 5 wt % and 15 wt %, and preferably between 5 wt % and 10 wt %. However, the present disclosure is not limited thereto.

Furthermore, in some embodiments of the present disclosure, the maximum thickness Tmax defined by the thickness of the encapsulation colloid6from the upper surface of the support substrate1to the top edge of the light-transmitting plate5can be, for example, between 650 micrometers and 1,600 micrometers, and preferably between 650 micrometers and 1,000 micrometers.

In addition, the angle α included by the colloid surface61of the encapsulation colloid6and the outside wall51of the light-transmitting plate5is an acute angle as shown inFIG.5, and the acute angle is an included angle less than 90 degrees (e.g., an included angle between 30 degrees and 60 degrees).

According to the above configuration, through the design of the material properties of the first fillers FP11and the second fillers FP12in the encapsulation colloid6, the semiconductor package structure100A of the first embodiment of the present disclosure has an improved filler distribution so as to avoid glass cracks caused by filler separation.

Second Embodiment

Referring toFIG.6, a second embodiment of the present disclosure provides a semiconductor package structure100B, which is substantially the same as the semiconductor package structure100A of the above-mentioned first embodiment, except for the size design of the fillers.

More specifically, the encapsulation colloid6of the semiconductor package structure100B of the second embodiment of the present disclosure includes a plurality of first fillers FP21and a plurality of second fillers FP22dispersed therein. Each of the first fillers FP21has a first density, each of the second fillers FP22has a second density, and the first density of each of the first fillers FP21is greater than the second density of each of the second fillers FP22. Furthermore, the first density of each of the first fillers FP21and the second density of each of the second fillers FP22are both greater than the density of the liquid resin encapsulant.

Furthermore, each of the first fillers FP21has a first particle size, and each of the second fillers FP22has a second particle size. The first particle size of each of the first fillers FP21is smaller than the second particle size of each of the second fillers FP22. As shown inFIG.6, each of the first fillers FP21distributed in the lower half part of the encapsulation colloid6has a smaller particle size, and each of the second fillers FP22distributed in the upper half part of the encapsulation colloid6has a larger particle size.

In the present embodiment, the first fillers FP21have less sinking resistance when sinking downward in the liquid resin encapsulant, and the first fillers FP21may sink faster than the second fillers FP22. Therefore, each of the first fillers FP21has the first sinking rate greater than the second sinking rate. In other words, the second fillers FP22have larger sinking resistance when sinking downward in the liquid resin encapsulant, and the second fillers FP22may sink slower than the first fillers FP21. Therefore, each of the second fillers FP22has the second sinking rate less than the first sinking rate.

According to the above configuration, through the design of the material properties of the first fillers FP21and the second fillers FP22in the encapsulation colloid6, the semiconductor package structure100B of the second embodiment of the present disclosure has an improved filler distribution so as to avoid glass cracks caused by filler separation.

Third Embodiment

Referring toFIG.7, a third embodiment of the present disclosure provides a semiconductor package structure100C, which is substantially the same as the semiconductor package structure100A of the above-mentioned first embodiment, except for the size design of the fillers.

More specifically, the encapsulation colloid6of the semiconductor package structure100C of the third embodiment of the present disclosure includes a plurality of first fillers FP31and a plurality of second fillers FP32dispersed therein.

Each of the first fillers FP31has a first density, each of the second fillers FP32has a second density, and the first density of each of the first fillers FP31is greater than the second density of each of the second fillers FP32. Furthermore, the first density of each of the first fillers FP31and the second density of each of the second fillers FP32are both greater than the density of the liquid resin encapsulant.

Furthermore, each of the first fillers FP31has a first particle size, and each of the second fillers FP32has a second particle size. The first particle size of each of the first fillers FP31is larger than the second particle size of each of the second fillers FP32. As shown inFIG.7, each of the first fillers FP31distributed in the lower half part of the encapsulation colloid6has a larger particle size, and each of the second fillers FP32distributed in the upper half part of the encapsulation colloid6has a smaller particle size.

In the present embodiment, the first fillers FP31have less sinking resistance when sinking downward in the liquid resin encapsulant, and the first fillers FP31may sink faster than the second fillers FP32. Therefore, each of the first fillers FP31has the first sinking rate greater than the second sinking rate. In other words, the second fillers FP32have larger sinking resistance when sinking downward in the liquid resin encapsulant, and the second fillers FP32may sink slower than the first fillers FP31. Therefore, each of the second fillers FP32has the second sinking rate less than the first sinking rate.

According to the above configuration, through the design of the material properties of the first fillers FP31and the second fillers FP32in the encapsulation colloid6, the semiconductor package structure100C of the third embodiment of the present disclosure has an improved filler distribution so as to avoid glass cracks caused by filler separation.

Fourth Embodiment

Referring toFIG.8, a fourth embodiment of the present disclosure provides a semiconductor package structure100D, which is substantially the same as the semiconductor package structure100A of the above-mentioned first embodiment, and a difference of the semiconductor package structure100D of the fourth embodiment resides in appearances of the first and second fillers. More specifically, the encapsulation colloid6of the semiconductor package structure100D of the fourth embodiment includes a plurality of first fillers FP41and a plurality of second fillers FP42dispersed therein.

Each of the first fillers FP41has a spherical appearance that has a first sphericity. Each of the second fillers FP42has a non-spherical appearance (e.g., a polygonal appearance) that has a second sphericity. The first sphericity of each of the first fillers FP41is greater than the second sphericity of each of the second fillers FP42.

It should be noted that the “sphericity” referred to in the present embodiment can be defined as “a ratio of the minimum particle diameter to the maximum particle diameter of a same particle.” For example, according to an observation result of a scanning electron microscope (SEM), a ratio of the minimum particle diameter to the maximum particle diameter of a particle is not less than 0.8, which means that the sphericity of the particle is not less than 0.8. If the “sphericity” of the particle approaches 1, the particle approaches a perfect sphere. In an embodiment, the “sphericity” can be an average sphericity.

As shown inFIG.8, each of the first fillers FP41distributed in the lower half part of the encapsulation colloid6has an appearance closer to a sphere, so as to have the first sphericity higher than the second sphericity.

From another perspective, each of the second fillers FP42distributed in the upper half part of the encapsulation colloid6has a polygonal appearance, so as to have the second sphericity lower than the first sphericity.

In the present embodiment, since each of the first fillers FP41has a relatively high first sphericity, the first fillers FP41have less sinking resistance when sinking downward in the liquid resin encapsulant. That is, a contact area of each of the first fillers FP41contacting the liquid resin encapsulant is small. Accordingly, the first fillers FP41can sink faster than the second fillers FP42, so as to have a relatively large first sinking rate.

Furthermore, since each of the second fillers FP42has a relatively low second sphericity, the second fillers FP42have larger sinking resistance when sinking downward in the liquid resin encapsulant. That is, a contact area of each of the second fillers FP42contacting the liquid resin encapsulant is large. Accordingly, the second fillers FP42can sink slower than the first fillers FP41so as to have a relatively low second sinking rate.

In some embodiments, the first sphericity of each of the first fillers FP41is between 0.6 and 1.0. The second sphericity of each of the second fillers FP42is between 0.4 and 0.8. An absolute value of a difference between the first sphericity and the second sphericity is not less than 0.05, and is preferably not less than 0.1, but the present disclosure is not limited thereto.

According to the above configuration, through the designs of appearances and sphericities of the first fillers FP41and the second fillers FP42in the encapsulation colloid6, the semiconductor package structure100D of the fourth embodiment of the present disclosure has an improved filler distribution so as to avoid glass cracks caused by filler separation.

It is worth mentioning that, in the fourth embodiment of the present disclosure, the density of each of the first fillers FP41and the density of each of the second fillers FP42can be the same as or different from each other. Further, the particle size of each of the first fillers FP41and the particle size of each of the second fillers FP42can be the same as or different from each other, and the present disclosure is not limited thereto.

As long as the designs of appearances and sphericities of the first fillers FP41and the second fillers FP42enable each of the first fillers FP41to have a relatively large first sinking rate in the liquid resin encapsulant, and enable each of the second fillers FP42to have a small second sinking rate relative to the first fillers FP41in the liquid resin encapsulant, the designs of appearances and sphericities fall under the spirit and scope of the present disclosure.

Fifth Embodiment

Referring toFIG.9, a fifth embodiment of the present disclosure provides a semiconductor package structure100E, which is substantially the same as the semiconductor package structure100A of the above-mentioned first embodiment, and the difference of the semiconductor package structure100E of the fifth embodiment is the surface roughnesses of the first and second fillers. More specifically, the encapsulation colloid6of the semiconductor package structure100E of the fifth embodiment of the present disclosure includes a plurality of first fillers FP51and a plurality of second fillers FP52dispersed therein.

An outer surface of each of the first fillers FP51has a first surface roughness, an outer surface of each of the second fillers FP52has a second surface roughness, and the first surface roughness of each of the first fillers FP51is less than the second surface roughness of each of the second fillers FP52.

That is, each of the first fillers FP51has a smooth surface, and each of the second fillers FP52has a rough surface.

As shown inFIG.9, each of the first fillers FP51distributed in the lower half part of the encapsulation colloid6has a smoother surface than that of each of the second fillers FP52, so as to have the first surface roughness that is less than the second surface roughness. In other words, each of the second fillers FP52distributed in the upper half part of the encapsulation colloid6has a rougher surface than that of the first fillers FP51, so as to have the second surface roughness that is greater than the first surface roughness.

In the present embodiment, since each of the first fillers FP51has a relatively low first surface roughness, the first fillers FP51have less sinking resistance when sinking downward in the liquid resin encapsulant. That is, the outer surface of each of the first fillers FP51is smooth and has less resistance to contact with the liquid resin encapsulant. Accordingly, the first fillers FP51can sink faster than the second fillers FP52, so as to have the first sinking rate that is greater than the second sinking rate. Furthermore, since each of the second fillers FP52has a relatively large second surface roughness, the second fillers FP52have larger sinking resistance when sinking downward in the liquid resin encapsulant. That is, the outer surface of each of the second fillers FP52is rough and has higher resistance when coming in contact with the liquid resin encapsulant. Accordingly, the second fillers FP52can sink slower than the first fillers FP51so as to have the second sinking rate that is less than the first sinking rate.

In some embodiments of the present disclosure, the first surface roughness and the second surface roughness are both defined by arithmetic mean roughness Ra, and the arithmetic mean roughness Ra can be measured, for example, by an atomic force microscope (AFM), and Ra is calculated based on the international standard test method of JIS B 0601, but the present disclosure is not limited thereto.

Further, in some embodiments of the present disclosure, the first surface roughness of each of the first fillers FP51is between 25 nm and 100 nm, and preferably between 25 nm and 75 nm. In addition, the second surface roughness of each of the second fillers FP52is between 50 nm and 125 nm, and preferably between 75 nm and 125 nm.

Furthermore, an absolute value of a difference between the first surface roughness and the second surface roughness is not less than 25 nm, but the present disclosure is not limited thereto.

According to the above configuration, through the designs of surface roughnesses of the first fillers FP51and the second fillers FP52in the encapsulation colloid6, the semiconductor package structure100E of the fifth embodiment of the present disclosure has an improved filler distribution so as to avoid glass cracks caused by filler separation.

It is worth mentioning that, in the fifth embodiment of the present disclosure, the density of each of the first fillers FP51and the density of each of the second fillers FP52can be the same as or different from each other. Further, the particle size of each of the first fillers FP51and the particle size of each of the second fillers FP5can be the same as or different from each other, and the present disclosure is not limited thereto.

As long as the designs of surface roughnesses of the first fillers FP51and the second fillers FP52enable each of the first fillers FP51to have a relatively large first sinking rate in the liquid resin encapsulant, and enable each of the second fillers FP52to have a relatively small second sinking rate in the liquid resin encapsulant, the designs of appearances and sphericities fall under the spirit and scope of the present disclosure.

Sixth Embodiment

Referring toFIG.10, a sixth embodiment of the present disclosure provides a semiconductor package structure100F, which is substantially the same as the semiconductor package structure100A of the above-mentioned first embodiment, and the difference of the semiconductor package structure100F of the sixth embodiment resides in the design of the light-transmitting plate5.

More specifically, in the semiconductor package structure100F of the sixth embodiment, a width of the light-transmitting plate5gradually increases from a top surface to a bottom surface of the light-transmitting plate5. That is, the light-transmitting plate5has a shape that is narrow at the top and wide at the bottom thereof. From a side view, the light-transmitting plate5has a trapezoidal shape, and the outside wall51of the light-transmitting plate5is a downward sloping side wall.

Accordingly, in the upper half part of the encapsulation colloid6, the top edge area defined by the portion sandwiched by the colloid surface61of the encapsulation colloid6and the outside wall51of the light-transmitting plate5becomes smaller in space. Accordingly, the fillers (i.e., the second fillers FP12) dispersed in the top edge area of the encapsulation colloid6can sink less easily and be filled in the top edge area more completely.

According to the above configuration, through the design of the light-transmitting plate5being narrow at top and wide at bottom, the semiconductor package structure100F of the sixth embodiment of the present disclosure has an improved filler distribution so as to avoid glass cracks caused by filler separation.

[Method for Producing Semiconductor Package Structure]

The structural and material characteristics of the semiconductor package structures of the first to sixth embodiments are described above, and a method for producing a semiconductor package structure according to an embodiment of the present disclosure is described in detail below.

As shown inFIG.11AtoFIG.11D, an embodiment of the present disclosure provides a method for producing a semiconductor package structure, which includes step S110, step S120, step S130, and step S140. It should be noted that a sequence of the steps and actual ways of operation in the present embodiment can be adjusted according to practical requirements, and are not limited to those described in the present embodiment.

As shown inFIG.11A, step S110includes: providing a support substrate1and disposing a chip body2on a side surface (i.e., an upper surface) of the support substrate1.

The support substrate1can be formed with a circuit pattern11. Another side surface (i.e. a lower surface) of the support substrate1can be provided with a plurality of conductive pins12. Further, a side surface of the chip body2away from the support substrate1can be provided with at least one sensing chip21. The plurality of conductive pins12are electrically connected to the circuit pattern11and the sensing chip21.

As shown inFIG.11B, step S120includes: connecting a plurality of metal leads3between the support substrate1and the chip body2respectively, so that the support substrate1and the chip body2can be electrically connected to each other through the plurality of metal leads3.

As shown inFIG.11C, step S130includes disposing a light-transmitting plate5on the chip body2through a spacer element4, so that the chip body2, the spacer element4, and the light-transmitting plate5together form a closed space SP. The sensing chip21is located in the closed space SP, and the metal leads3are located outside of the closed space SP.

As shown inFIG.11D, step S140includes forming an encapsulation colloid6on the support substrate1to cover the outside surfaces of the chip body2, the spacer element4, and the light-transmitting plate5relative to the closed space SP, and the encapsulation colloid6covers the plurality of metal leads3therein.

In the present embodiment, the encapsulation colloid6can be formed by curing a liquid resin encapsulant. Furthermore, the liquid resin encapsulant can be, for example, formed on the support substrate1by glue dispensing to cover the outside surfaces of the chip body2, the spacer element4, and the light-transmitting plate5relative to the closed space SP.

The encapsulation colloid6includes a plurality of first fillers FP11and a plurality of second fillers FP12dispersed therein.

Furthermore, material properties of the plurality of first fillers FP11and the plurality of second fillers FP12meet following conditions.

Before the liquid resin encapsulant is cured (being in a flowable state), a sinking rate of each of the first fillers FP11in the liquid resin encapsulant is defined as a first sinking rate, a sinking rate of each of the second fillers FP12in the liquid resin encapsulant is defined as a second sinking rate, and the second sinking rate is less than the first sinking rate.

From another perspective, when the first fillers FP11and the second fillers FP12sink in the liquid resin encapsulant, the first fillers FP11have a lower sinking resistance so as to sink faster than the second fillers FP12. Therefore, each of the first fillers FP11has the first sinking rate greater than the second sinking rate. In other words, the second fillers FP12have a higher sinking resistance so as to sink slower than the first fillers FP11. Therefore, each of the second fillers FP12has the second sinking rate less than the first sinking rate.

According to the above configuration, through the design of the material properties of the first fillers FP11and the second fillers FP12in the encapsulation colloid6, the method for producing the semiconductor package structure can have an improved filler distribution so as to avoid glass cracks caused by filler separation.

Beneficial Effects of the Embodiments

In conclusion, in the semiconductor package structure and the method for producing the same provided by the present disclosure, through the design of material properties of the first fillers and the second fillers in the encapsulation colloid, the distribution of the first fillers and the second fillers in the encapsulation colloid can be effectively improved, and the glass cracks caused by the filler separation can be effectively avoided.