Patent ID: 12224359

DETAILED DESCRIPTION OF THE EXEMPLARY EMBODIMENTS

First Embodiment

Referring toFIG.1, a first embodiment of the present disclosure provides a sensor package structure100. The sensor package structure100includes a substrate1, a sensor chip2disposed on the substrate1through a plurality of solder balls6, a ring-shaped solder mask frame3disposed on the substrate1, a ring-shaped support4disposed on the ring-shaped solder mask frame3, and a light permeable member5that is disposed on the ring-shaped support4. Herein, the sensor package structure100in the present embodiment is illustrated as including the above components, but the sensor package structure100can be modified according to design requirements.

It should be noted that in order to conveniently describe the sensor package structure100of the present embodiment,FIG.1is plotted as a cross-sectional view. It could be understood that some portions of the sensor package structure100not shown inFIG.1shall have corresponding structures. For example,FIG.1shows only four of the solder balls6, but portions of the sensor package structure100not shown inFIG.1include other solder balls6. The following paragraphs respectively recite the structure and interconnection of each component of the sensor package structure100.

The substrate1in the present embodiment is in a rectangular shape, but the present disclosure is not limited thereto. The substrate1has a first board surface11and a second board surface12that is opposite to the first board surface11. The substrate1has a chip bonding region111and a ring-shaped carrying region112. The chip bonding region111is substantially arranged at the center of the first board surface11, and the ring-shaped carrying region112is arranged on the first board surface11and outside of the chip bonding region111(or the sensor chip2). In addition, the substrate1in the present embodiment can be provided with a plurality of soldering balls (not shown) disposed on the second board surface12, and the sensor package structure100can be soldered onto an electronic component (not shown) through the soldering balls, thereby electrically coupling the sensor package structure100to the electronic component.

The sensor chip2in the present embodiment is an image sensor chip, but the present disclosure is not limited thereto. An outer surface of the sensor chip2includes a top surface21, a bottom surface22opposite to the top surface21, and an outer lateral side23that is connected to a peripheral edge of the top surface21and a peripheral edge of the bottom surface22. The top surface21of the sensor chip2has a sensing region211substantially on a center portion thereof. The sensor chip2includes a plurality of internal contacts221arranged on the bottom surface22. The sensing region211is spaced apart from the outer lateral side23of the sensor chip2by a distance Dmin which is less than 300 μm. The sensor chip2further includes a plurality of conducting paths24extending from the top surface21to the bottom surface22. The conducting paths24are respectively connected to the internal contacts221and are electrically coupled to the sensing region211.

Moreover, the sensor chip2is disposed on the first board surface11of the substrate1, and is electrically coupled to the substrate1. In the present embodiment, the bottom surface22of the sensor chip2is mounted to the chip-bonding region111of the substrate1through the solder balls6so as to be electrically coupled to the substrate1. In other words, the internal contacts221of the sensor chip2are soldered onto the first board surface11of the substrate1through the solder balls6.

The ring-shaped solder mask frame3is disposed on the carrying region112of the first board surface11of the substrate1, the ring-shaped solder mask frame3surrounds and connects the outer lateral side23of the sensor chip2. A top side31of the ring-shaped solder mask frame3is coplanar with the top surface21of the sensor chip2, and an outer lateral side32of the ring-shaped solder mask frame3is flush with an outer lateral side of the substrate1. In other words, the outer lateral side23of the sensor chip2in the present embodiment is entirely connected to the inner lateral side33of the ring-shaped solder mask frame3, and the sensor chip2is embraced in the ring-shaped solder mask frame3.

It is noted that the ring-shaped solder mask frame3can be formed in a punching manner, a photolithography manner, a printing manner, or a coating manner, the thickness and the shape of the ring-shaped solder mask frame3can be effectively and precisely controlled for accommodating the sensor chip2or other components. Accordingly, the sensing region211of the sensor chip2is prevented from being contaminated by the ring-shaped solder mask frame3, thereby effectively further increasing yield rate and throughput of manufacturing of the sensor package structure100.

The ring-shaped support4is disposed on the top side31of the ring-shaped solder mask frame3, and the ring-shaped support4is arranged outside of the sensing region211and is not in contact with the top surface21of the sensor chip2. In the present embodiment, the ring-shaped support4may be formed with glue or an adhesive, and the ring-shaped support4is disposed substantially on a center portion of the top side31of the ring-shaped solder mask frame3, but the present disclosure is not limited thereto. For example, in other embodiments not shown in the present disclosure, the ring-shaped support4can be disposed on the entirety of the top side31of the ring-shaped solder mask frame3.

The light permeable member5includes a first surface51, a second surface52that is opposite to the first surface51, and an outer lateral surface53that is connected to a peripheral edge of the first surface51and a peripheral edge of the second surface52. Herein, the second surface52of the light permeable member5is disposed on the ring-shaped support4(i.e., the ring-shaped support4is sandwiched between the top side31of the ring-shaped solder mask frame3and the second surface52of the light permeable member5), so that the second surface52of the light permeable member5, the ring-shaped support4, and the sensor chip2jointly define an enclosed space E.

In the present embodiment, along a horizontal direction shown inFIG.1, an outer diameter of the light permeable member5is equal to that of the ring-shaped solder mask frame3. In other words, the outer lateral surface53of the light permeable member5is coplanar with the outer lateral side32of the ring-shaped solder mask frame3. Moreover, the outer diameter of the light permeable member5is slightly greater than that of the ring-shaped support4, so that the top side31of the ring-shaped solder mask frame3, an outer lateral side of the ring-shaped support4, and the light permeable member5jointly define a ring-shaped slot S.

Second Embodiment

Referring toFIG.2, a second embodiment of the present disclosure is disclosed therein. The second embodiment is similar to the first embodiment, so descriptions for identical portions between the two embodiments shall not be repeated again, and the differences between the two embodiments shall be recited in the following.

In the present embodiment, the sensor package structure100includes a substrate1, a sensor chip2disposed on the substrate1, a ring-shaped solder mask frame3disposed on the substrate1, a ring-shaped support4disposed on both the ring-shaped solder mask frame3and the sensor chip2, a light permeable member5disposed on the ring-shaped support4, a plurality of metal wires7electrically coupled to the substrate1and the sensor chip2, and a package body8that is formed on the substrate1.

The substrate1includes a plurality of first pads113arranged on the first board surface11. The first pads113are located outside of the carrying region112, and the first pads113of the present embodiment are arranged substantially in a ring-shape, but the present disclosure is not limited thereto. For example, in other embodiments not shown in the present disclosure, the first pads113can be arranged in two rows respectively located at two opposite sides of the chip-bonding region111.

The sensor chip2includes a plurality of second pads212arranged on the top surface21and outside of the sensing region211. The quantity and the positions of the second pads212of the sensor chip2in the present embodiment respectively correspond to those of the first pads113of the substrate1. Moreover, terminals at one end of the metal wires7are respectively connected to the first pads113, and terminals at the other end of the metal wires7are respectively connected to the second pads212, so that the substrate1can be electrically coupled to the sensor chip2through the metal wires7. In addition, the ring-shaped solder mask frame3is not in contact with any of the first pads113.

The ring-shaped support4is dispensed on both the top side31of the ring-shaped solder mask frame3and the top surface21of the sensor chip2, and the ring-shaped support4is arranged outside of the sensing region211. In the present embodiment, the ring-shaped support4may be formed with glue or an adhesive, and a part of each of the metal wires7and the corresponding second pad212are embedded in the ring-shaped support4.

The package body8is formed on the first board surface11of the substrate1, and another part of each of the metal wires7, which is exposed from the ring-shaped support4, and the corresponding first pad113are embedded in the package body8. An outer lateral side81of the package body8is coplanar with the outer lateral side of the substrate1, and is also coplanar with the outer lateral surface53of the light permeable member5. In other words, the sensor chip2, the ring-shaped solder mask frame3, and the ring-shaped support4are embedded in the package body8, and the slot S is fully filled with the package body8.

Third Embodiment

Referring toFIG.3andFIG.4, a third embodiment of the present disclosure is similar to the first and second embodiments of the present disclosure, so descriptions for identical portions among the embodiments will be not repeated again, and the differences between the first and second embodiments shall be recited in the following.

In the present embodiment, the ring-shaped solder mask frame3is disposed on the carrying region112of the first board surface11of the substrate1. The ring-shaped solder mask frame3surrounds and is spaced apart from the outer lateral side23of the sensor chip2. In other words, the sensor chip2and the metal wires7are arranged in a space enclosed by the ring-shaped solder mask frame3. Moreover, the ring-shaped solder mask frame3in the present embodiment is integrally formed as a one-piece structure. The outer lateral side32of the ring-shaped solder mask frame3is coplanar with the outer lateral side of the substrate1, and the inner lateral side33of the ring-shaped solder mask frame3is in a step shape and has a step surface331.

The second surface52of the light permeable member5is disposed on the inner lateral side33of the ring-shaped solder mask frame3, and the light permeable member5in the present embodiment is disposed on the step surface331of the ring-shaped solder mask frame3. Moreover, the second surface52of the light permeable member5, the ring-shaped solder mask frame3, and the sensor chip2jointly define an enclosed space E. The first surface51of the light permeable member5is coplanar with the top side31of the ring-shaped solder mask frame3, but the present disclosure is not limited thereto.

In another configuration as shown inFIG.4, the sensor package structure100can further include a package body8formed on the top side31of the ring-shaped solder mask frame3. Moreover, the package body8covers and is connected to the outer lateral surface53of the light permeable member5, the outer lateral side81of the package body8is coplanar with the outer lateral side32of the ring-shaped solder mask frame3, and the top side of the package body8is coplanar with the first surface51of the light permeable member5.

Fourth Embodiment

Referring toFIG.5toFIG.8, a fourth embodiment of the present disclosure is similar to the third embodiment of the present disclosure. So, descriptions for identical portions between the third and fourth embodiments of the present disclosure (e.g., the substrate1, the sensor chip2, and the light permeable member5) will be repeated again, and the differences between the third embodiment and the fourth embodiment shall be recited in the following.

As shown inFIG.5, the ring-shaped solder mask frame3in the present embodiment includes a plurality of solder mask layers30stacked and adhered together. Inner lateral sides of the solder mask layers30are not coplanar with each other. In other words, the inner lateral side33of the ring-shaped solder mask frame3is in a step shape and has a plurality of step surfaces331. Moreover, outer lateral sides of the solder mask layers30are coplanar with each other, but the present disclosure is not limited thereto. For example, the arrangement of the solder mask layers30can be those as shown inFIG.6andFIG.7, the outer lateral sides of the solder mask layers30are not coplanar with each other.

In addition, the second surface52of the light permeable member5is disposed on the top side31of the ring-shaped solder mask frame3(or the solder mask layers30). The package body8is formed on the first board surface11of the substrate1. Further, package body8covers and contacts the outer lateral sides of the solder mask layers30and at least part of the outer lateral surface53of the light permeable member5, but the present disclosure is not limited thereto. For example, as shown inFIG.8, the light permeable member5can be disposed adjacent to the inner lateral side of one of the solder mask layers30of the ring-shaped solder mask frame3(e.g., the step surface331close to the top side31of the ring-shaped solder mask frame3).

In conclusion, the sensor package structure of the present disclosure is provided with the ring-shaped solder mask frame that surrounds the outer lateral side of the sensor chip. Since the thickness and the shape of the ring-shaped solder mask frame can be effectively and precisely controlled for accommodating the sensor chip or other components, the sensing region of the sensor chip is prevented from being contaminated by the ring-shaped solder mask frame, therefore effectively increasing yield rate and throughput of the manufacturing of the sensor package structure.

Specifically, the ring-shaped solder mask frame of the present disclosure can be integrally formed as a one-piece structure or can include a plurality of solder mask layers that are stacked and adhered together, so that the ring-shaped solder mask frame can fit multiple design requirements, and promoting of the sensor package structure distinct from conventional can be facilitated.

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.