Patent ID: 12256573

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

The present disclosure is more particularly described in the following examples that are intended as illustrative only since numerous modifications and variations therein will be apparent to those skilled in the art. Like numbers in the drawings indicate like components throughout the views. As used in the description herein and throughout the claims that follow, unless the context clearly dictates otherwise, the meaning of “a,” “an” and “the” includes plural reference, and the meaning of “in” includes “in” and “on.” Titles or subtitles can be used herein for the convenience of a reader, which shall have no influence on the scope of the present disclosure.

The terms used herein generally have their ordinary meanings in the art. In the case of conflict, the present document, including any definitions given herein, will prevail. The same thing can be expressed in more than one way. Alternative language and synonyms can be used for any term(s) discussed herein, and no special significance is to be placed upon whether a term is elaborated or discussed herein. A recital of one or more synonyms does not exclude the use of other synonyms. The use of examples anywhere in this specification including examples of any terms is illustrative only, and in no way limits the scope and meaning of the present disclosure or of any exemplified term. Likewise, the present disclosure is not limited to various embodiments given herein. Numbering terms such as “first,” “second” or “third” can be used to describe various components, signals or the like, which are for distinguishing one component/signal from another one only, and are not intended to, nor should be construed to impose any substantive limitations on the components, signals or the like.

First Embodiment

Referring toFIG.1toFIG.3, a first embodiment of the present disclosure is provided. As shown inFIG.1, the present disclosure provides a sensor package structure100, and more particularly to an ambient light sensor package structure, but the present disclosure is not limited thereto. In other words, any package structure not encapsulating a sensor chip therein has a structural design different from that of the sensor package structure100of the present embodiment.

As shown inFIG.1toFIG.3, the sensor package structure100includes a substrate1, a sensor chip2disposed on the substrate1, a plurality of metal wires3electrically coupled to the sensor chip2and the substrate1, a plurality of adhesive rings4disposed on the sensor chip2, a plurality of filtering lenses5respectively adhered to the adhesive rings4, and an encapsulant6that is formed on the substrate1.

The sensor package structure100in the present embodiment includes the above components, but can be adjusted or changed according to design requirements. For example, in other embodiments of the present disclosure not shown in the drawings, the sensor package structure100can be provided without the metal wires3, and the sensor chip2is fixed onto and electrically coupled to the substrate1in a flip-chip manner. The structure and connection relationship of each component of the sensor package structure100will be described in the following description.

The substrate1of the present embodiment has a square shape or a rectangular shape, but the present disclosure is not limited thereto. An upper surface11of the substrate1includes a chip-bonding region111arranged approximately on a center portion thereof, and the substrate1includes a plurality of bonding pads112that are disposed on the upper surface11and are arranged outside of the chip-bonding region111. The bonding pads112in the present embodiment are substantially in a ring-shaped arrangement, but the present disclosure is not limited thereto. For example, in other embodiments of the present disclosure not shown in the drawings, the bonding pads112can be arranged in two rows respectively at two opposite sides of the chip-bonding region111.

In addition, the substrate1can be further provided with a plurality of solder balls B disposed on a lower surface12thereof. The substrate1can be soldered onto an electronic component (not shown in the drawings) through the solder balls B, thereby electrically connecting the sensor package structure100to the electronic component.

The sensor chip2in the present embodiment has a square shape or a rectangular shape, and is an image sensor chip, but the present disclosure is not limited thereto. A bottom surface22of the sensor chip2is fixed onto the chip-bonding region111of the substrate1(through a chip-bonding adhesive along a predetermined direction D). In other words, the sensor chip2is arranged to be surrounded on the inside of the bonding pads112. Moreover, a top surface21of the sensor chip2has a sensing region211and a peripheral region212that is arranged outside of the sensing region211. Two ends of each of the metal wires3are respectively connected to the substrate1and the peripheral region212of the sensor chip2, so that the substrate1and the sensor chip2are electrically coupled to each other.

In the present embodiment, the sensor chip2includes a plurality of connection pads2121arranged on the peripheral region212. In other words, the connection pads2121are arranged outside of the sensing region211. The number and positions of the connection pads2121of the sensor chip2in the present embodiment correspond to those of the bonding pads112of the substrate1. In other words, the peripheral region212in the present embodiment surrounds the sensing region211, and the connection pads2121are substantially in a ring-shaped arrangement. Moreover, the two ends of each of the metal wires3are respectively connected to one of the bonding pads112and the corresponding connection pad2121.

Specifically, the sensing region211defines a layout boundary2111and a plurality of sub-regions2112that are defined by the layout boundary2111and that are separate from each other. In the present embodiment, the layout boundary2111is substantially in a checkerboard shape, such that the sub-regions2112have substantially the same size and are in a matrix arrangement, but the present disclosure is not limited thereto. For example, in other embodiments of the present disclosure not shown in the drawings, the layout boundary2111can be changed or adjusted according to design requirements, and the sub-regions2112can have different sizes.

The adhesive rings4are disposed on the sensing region211, and each of the adhesive rings4surrounds one of the sub-regions2112. In other words, the adhesive rings4can be arranged along the layout boundary2111. The adhesive rings4can be a tape in a solid state for directly adhering to the sensing region211; or, the adhesive rings4can be a colloid disposed on the sensing region211and being solidified, but the present disclosure is not limited thereto.

Moreover, a quantity of the adhesive rings4is equal to a quantity of the filtering lenses5, and inner surfaces51of the filtering lenses5are respectively adhered to the adhesive rings4, so that each of the filtering lenses5, a corresponding one of the adhesive rings4, and a corresponding one of the sub-regions2112jointly define a buffering space21that is enclosed and that is filled with air. In other words, any package structure not having a space between a filtering lens and a sensing region thereof is different from the sensor package structure100of the present embodiment.

Accordingly, in each of the filtering lenses5, the corresponding adhesive ring4, and the corresponding sub-region2112of the sensor package structure100provided by the present embodiment, the adhesive ring4has a larger coefficient of thermal expansion (CTE), and the buffering space S1can receive a thermal expansion portion of the adhesive ring4, thereby preventing the filtering lens5and the sub-region2112from being damaged by being squeezed as a result of the thermal expansion of the adhesive ring4.

It should be noted that N represents a quantity of the sub-regions2112of the sensing region211, M represents a quantity of the filtering lenses5, and the filtering lenses5are configured to allow lights having N number of different wavelengths to pass therethrough. In other words, the filtering lenses5has N number of filtering configurations different from each other. Moreover, L, M, and N are positive integers greater than one, L is greater than or equal to M, and M is greater than or equal to N. The filtering lenses5in the present embodiment include, but is not limited to, at least one of a near-infrared light filtering lens, a red light filtering lens, a green light filtering lens, and a blue light filtering lens. In other embodiments of the present disclosure, the filtering lens5can correspond to light of wavelength other than that of the above lights.

In the present embodiment, L is equal to M (e.g., any one of the sub-regions2112carries or is provided with one of the adhesive rings4and one of the filtering lenses5), and M is equal to N (e.g., any two of the filtering lenses5are respectively configured to allow lights of different wavelengths to pass therethrough), but the present disclosure is not limited thereto. For example, in other embodiments of the present disclosure not shown in the drawings, M can be greater than N. In other words, at least two of the filtering lenses5enable lights of same wavelength to pass therethrough according to design requirements.

The encapsulant6is formed on the upper surface11of the substrate1, and edges of the encapsulant6are flush with edges of the substrate1. The metal wires3, the sensor chip2, the adhesive rings4, and the filtering lenses5are embedded in the encapsulant6, and at least part of an outer surface52of each of the filtering lenses5is exposed from the encapsulant6.

Specifically, each of the filtering lenses5has a light-permeable segment5aand an assembling segment5bthat surrounds the light-permeable segment5a, and each of the filtering lenses5is adhered to the corresponding adhesive ring4through the assembling segment5bthereof. In the present embodiment, the encapsulant6is connected to and covers the peripheral region212and the layout boundary2111of the sensor chip2, and the encapsulant6is connected to and covers lateral surfaces and a bottom surface of the assembling segment5bof each of the filtering lenses5. Moreover, the outer surface52of each of the filtering lenses5is exposed from the encapsulant6.

The encapsulant6of the present embodiment is opaque for blocking a visible light from passing therethrough. The encapsulant6is a liquid encapsulation, but the present disclosure is not limited thereto. For example, in other embodiments of the present disclosure not shown in the drawings, the encapsulant6can be a molding encapsulant.

In summary, in the sensor package structure100provided by the present embodiment, the filtering lenses5are respectively disposed on the sub-regions2112of the sensor chip2through adhesive rings4, so that a sensing requirement for one kind of light can be met by one of the filtering lenses5, thereby reducing the complexity and cost of manufacturing the sensor package structure100under the condition that the sensing requirements of the sensor chip2are met.

Second Embodiment

Referring toFIG.4andFIG.5, a second embodiment of the present disclosure, which is similar to the first embodiment of the present disclosure, is provided. For the sake of brevity, descriptions of the same components in the first and second embodiments of the present disclosure will be omitted herein, and the following description only discloses different features between the first and second embodiments.

In the present embodiment, a quantity of the sub-regions2112is greater than a quantity of the filtering lenses5(i.e., L is greater than M). In other words, at least one of the sub-regions2112acan be provided to have no sensing requirement and does not have the adhesive rings4and the filtering lenses5disposed thereon. Specifically, at least one of the sub-regions2112athat does not have the adhesive rings4and the filtering lenses5disposed thereon is covered by the encapsulant6.

Third Embodiment

Referring toFIG.6andFIG.7, a third embodiment of the present disclosure, which is similar to the first and second embodiments of the present disclosure, is provided. For the sake of brevity, descriptions of the same components in the first to third embodiments of the present disclosure will be omitted herein, and the following description only discloses different features among the first to third embodiments.

In the present embodiment, the encapsulant6includes a main portion61formed on the substrate1and an extension portion62that extends from the main portion61along a direction away from the substrate1. The shape and volume of the main portion61in the present embodiment are substantially identical to those of the encapsulant6disclosed in the first embodiment (as shown inFIG.3).

Moreover, the extension portion62protrudes from the outer surfaces52of the filtering lenses5, so that the extension portion62and the outer surface52of each of the filtering lenses5jointly define a light-permeable slot63. In other words, the encapsulant6covers the assembling segment5bof each of the filtering lenses5by forming the extension portion62(e.g., in each of the filtering lenses5, a part of the outer surface52arranged on the assembling segment5bis covered by the extension portion62), but is not in contact with the light-permeable segment5a.

In addition, an inner side wall and a bottom wall of each of the light-permeable slots63have an angle σ therebetween that is greater than or equal to 90 degrees, thereby effectively controlling an angle of light traveling into the corresponding filtering lens5. Moreover, the adhesive rings4in the present embodiment are preferably arranged in a projection space defined by orthogonally projecting the extension portion62toward the top surface21of the sensor chip2along the predetermined direction D. Accordingly, each of the adhesive rings4can be shielded along the predetermined direction D by the extension portion62, such that the flare phenomenon of the sensor package structure100caused by light reflected from any one of the adhesive rings4can be effectively reduced.

Fourth Embodiment

Referring toFIG.8toFIG.10, a fourth embodiment of the present disclosure, which is similar to the first embodiment of the present disclosure, is provided. For the sake of brevity, descriptions of the same components in the first and fourth embodiments of the present disclosure will be omitted herein, and the following description only discloses different features between the first and fourth embodiments.

In the present embodiment, the sensor package structure100uses a light absorption layer7to replace the encapsulant6of the first embodiment as shown inFIG.3. The light absorption layer7in the present embodiment is integrally formed as a single one-piece structure and is only formed on the top surface21of the sensor chip2, so that the metal wires3of the sensor package structure100are exposed in an external environment (e.g., two ends of each of the metal wires5are respectively connected to the substrate1and the peripheral region212of the sensor chip2, and each of the metal wires5is not in contact with other components).

Specifically, the light absorption layer7is formed on the layout boundary2111of the sensor chip2, and a surrounding lateral surface of each of the filtering lenses5and an outer lateral edge of each of the adhesive rings4are covered by the light absorption layer7. In other words, the outer surfaces52of the filtering lenses5are exposed in the external environment, and the light absorption layer7of the sensor package structure100can be provided for blocking light, so that the light can travel to any one of the sub-regions2112only by passing through the outer surface52of the corresponding filtering lens5.

Moreover, a space between any two of the adhesive rings4adjacent to each other and a space between any two of the filtering lenses5adjacent to each other are fully filled with the light absorption layer7, and the light absorption layer7preferably does not cover the outer surface52of each of the filtering lenses5, but the present disclosure is not limited thereto. For example, in other embodiments of the present disclosure not shown in the drawings, the space between any two of the filtering lenses5adjacent to each other are not filled with the light absorption layer7; or, at least part of the peripheral region212of the sensor chip2can be covered by the light absorption layer7.

It should be noted that a quantity of the sub-regions2112of the sensing region211is L in number, a quantity of the filtering lenses5is M in number, and the filtering lenses5are configured to allow lights having N number of different wavelengths to pass therethrough. In other words, the filtering lenses5has N number of filtering configurations different from each other. Moreover, L, M, and N are positive integers greater than one, L is greater than or equal to M, and M is greater than or equal to N. The filtering lenses5in the present embodiment include, but is not limited to, at least one of a near-infrared light filtering lens, a red light filtering lens, a green light filtering lens, and a blue light filtering lens. In other embodiments of the present disclosure, the filtering lens5can correspond to light of wavelength other than that of the above lights.

In the present embodiment, L is equal to M (e.g., any one of the sub-regions2112carries or is provided with one of the adhesive rings4and one of the filtering lenses5), and M is equal to N (e.g., any two of the filtering lenses5are respectively configured to allow lights of different wavelengths to pass therethrough), but the present disclosure is not limited thereto. For example, in other embodiments of the present disclosure not shown in the drawings, M can be greater than N. In other words, at least two of the filtering lenses5enable lights of same wavelength to pass therethrough according to design requirements.

Fifth Embodiment

Referring toFIG.11, a fifth embodiment of the present disclosure, which is similar to the fourth embodiment of the present disclosure, is provided. For the sake of brevity, descriptions of the same components in the fourth and fifth embodiments of the present disclosure will be omitted herein, and the following description only discloses different features between the fourth and fifth embodiments.

In the present embodiment, a quantity of the sub-regions2112is greater than a quantity of the filtering lenses5(i.e., L is greater than M). In other words, at least one of the sub-regions2112acan be provided for no sensing requirement and does not carry the adhesive rings4and the filtering lenses5thereon. Specifically, at least one of the sub-regions2112athat does not have the adhesive rings4and the filtering lenses5disposed thereon is covered by the light absorption layer7.

Sixth Embodiment

Referring toFIG.11, a fifth embodiment of the present disclosure, which is similar to the fourth and fifth embodiments of the present disclosure, is provided. For the sake of brevity, descriptions of the same components in the fourth to sixth embodiments of the present disclosure will be omitted herein, and the following description only discloses different features among the fourth to sixth embodiments.

In the present embodiment, the sensor package structure100further includes a frame8and a light-permeable sheet9(e.g., a transparent glass) that is assembled to the frame8. The frame8is disposed on the substrate1and surrounds the metal wires3, and outer lateral surfaces of the frame8are preferably flush with the edges of the substrate1.

Moreover, the light-permeable sheet9is fixed onto a top end of the frame8. The substrate1, the frame8, and the light-permeable sheet9jointly define an enclosed space S2, and the sensor chip2, the adhesive rings4, the filtering lenses5, the light absorption layer7, and the metal layers3are arranged in the enclosed space S2.

Specifically, the size of the light-permeable sheet9can be adjusted or changed according to design requirements, but the present disclosure is not limited thereto. For example, as shown inFIG.12andFIG.13, the size of the light-permeable sheet9can be substantially identical to (or slightly smaller than) that of the substrate1; or, as shown inFIG.14andFIG.15, a projection region defined by orthogonally projecting the light-permeable sheet9onto the top surface21of the sensor chip2overlaps the sensing region211and does not overlap the peripheral region212, thereby effectively preventing light passing through from traveling to any one of the metal wires3.

Beneficial Effects of the Embodiments

In conclusion, in the sensor package structure provided by the present disclosure, the filtering lenses are respectively disposed on the sub-regions of the sensor chip through adhesive rings, so that a sensing requirement for one kind of light can be met by one of the filtering lenses, thereby reducing the complexity and cost of manufacturing the sensor package structure under the condition that the sensing requirements of the sensor chip are met.

Moreover, in each of the filtering lenses, the corresponding adhesive ring, and the corresponding sub-region of the sensor package structure provided by the present disclosure, the adhesive ring has a larger CTE, and the buffering space can receive a thermal expansion portion of the adhesive ring, thereby preventing the filtering lens and the sub-region from being damaged by being squeezed as a result of the thermal expansion of the adhesive ring.

The foregoing description of the exemplary embodiments of the disclosure has been presented only for the purposes of illustration and description and is not intended to be exhaustive or to limit the disclosure to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching.

The embodiments were chosen and described in order to explain the principles of the disclosure and their practical application so as to enable others skilled in the art to utilize the disclosure and various embodiments and with various modifications as are suited to the particular use contemplated. Alternative embodiments will become apparent to those skilled in the art to which the present disclosure pertains without departing from its spirit and scope.