Electronic device and method for manufacturing electronic device

An electronic device includes a substrate and a flexible printed circuit board. The substrate includes a plurality of first pins disposed on the substrate. The flexible printed circuit board includes a plurality of second pins disposed on the flexible printed circuit board. The first pins and the second pins are bonded to each other to form a plurality of bonding points. The bonding points include at least one central bonding point and at least one first bonding point. The at least one central bonding point is located in a central area of the electronic device. The at least one first bonding point is located in a first area of the electronic device. The first area is located outside the central area. A line width of the at least one first bonding point is greater than a line width of the at least one central bonding point.

BACKGROUND

Field of Disclosure

The present disclosure relates to an electronic device and a method. More particularly, the present disclosure relates to an electronic device comprising a touch panel and a method for manufacturing an electronic device.

Description of Related Art

The bonding area of the prior art touch panel is designed with equal line width and equal line spacing. The equal line width and equal line spacing are designed according to the maximum common difference of the product, so a sufficient design space is required.

However, with the development of ultra-thin flexible substrate technology, it is impossible to solve the problem of increasing common difference as the length of the bonding area in the product increases.

For the foregoing reason, there is a need to provide some other suitable pin design method to solve the problems of the prior art.

SUMMARY

One aspect of the present disclosure provides an electronic device. The electronic device comprises a substrate and a flexible printed circuit board. The substrate comprises a plurality of first pins. The plurality of first pins are disposed on the substrate. The flexible printed circuit board comprises a plurality of second pins. The plurality of second pins are disposed on the flexible printed circuit board. The plurality of first pins and the plurality of second pins are bonded to each other to form a plurality of bonding points. The plurality of bonding points comprise at least one central bonding point and at least one first bonding point. The at least one central bonding point is located in a central area of the electronic device. The at least one first bonding point is located in a first area of the electronic device. The first area is located outside the central area. A line width of the at least one first bonding point is greater than a line width of the at least one central bonding point.

In the foregoing, the at least one central bonding point comprises a plurality of central bonding points. The line width of each of the plurality of central bonding points is equal.

In the foregoing, the at least one first bonding point comprises a plurality of first bonding points. The line width of each of the plurality of first bonding points is equal.

In the foregoing, a difference between the line width of each of the plurality of central bonding points and the line width of each of the plurality of first bonding points is equal. The difference between the line width of each of the plurality of central bonding points and the line width of each of the plurality of first bonding points is between 0 μm and 25 μm.

In the foregoing, a spacing between two adjacent central bonding points of the plurality of central bonding points is equal. A spacing between two adjacent first bonding points of the plurality of first bonding points is equal.

In the foregoing, the spacing between two adjacent central bonding points of the plurality of central bonding points and the spacing between two adjacent first bonding points of the plurality of first bonding points are smaller than or equal to 380 μm.

In the foregoing, each of the plurality of central bonding points and each of the plurality of first bonding points are arranged on a same straight line.

In the foregoing, the electronic device comprises a first side and a second side. The second side is opposite to the first side. The first area is disposed adjacent to the central area and is located at a position between the central area and the first side.

In the foregoing, the electronic device comprises a first side and a second side. The second side is opposite to the first side. The central area and the first area are arranged in an arrangement sequence from the second side to the first side of the electronic device.

In the foregoing, a length of the central area and a length of first area are between 4.75 mm and 5.25 mm.

In the foregoing, the plurality of bonding points further comprise at least one second bonding point located in a second area of the electronic device. The second area is located outside the first area. A line width of the at least one second bonding point is greater than the line width of the at least one first bonding point.

In the foregoing, the line width of the at least one central bonding point, the line width of the at least one first bonding point, and the line width of the at least one second bonding point present an arithmetic distribution. A common difference between the line width of the at least one central bonding point, the line width of the at least one first bonding point, and the line width of the at least one second bonding point is between 0 μm and 25 μm.

In the foregoing, the line width of the at least one central bonding point, the line width of the at least one first bonding point, and the line width of the at least one second bonding point are increased or decreased with the common difference.

In the foregoing, a first spacing between the at least one central bonding point and the at least one first bonding point and a second spacing between the at least one first bonding point and the at least one second bonding point are both smaller than or equal to 380 μm.

In the foregoing, the at least one central bonding point, the at least one first bonding point, and the at least one second bonding point are arranged on a same straight line.

In the foregoing, the electronic device comprises a first side and a second side. The second side is opposite to the first side. The at least one first bonding point comprises two first bonding points. The two first bonding points are respectively disposed in two first areas of the electronic device. The at least one second bonding point comprises two second bonding points. The two second bonding points are respectively disposed in two second areas of the electronic device. One of the two second areas, one of the two first areas, the central area, another one of the two first areas, and another one of the two second areas are arranged in an arrangement sequence from the second side to the first side of the electronic device.

In the foregoing, a length of each of the first area and the second area is between 4.75 mm and 5.25 mm, and a length of the central area is between 9.5 mm and 10.5 mm.

Another aspect of the present disclosure provides a method for manufacturing an electronic device. The method for manufacturing the electronic device comprises the following steps: disposing a plurality of first pins on a substrate; disposing a plurality of second pins on a flexible printed circuit board; and bonding the plurality of first pins and the plurality of second pins to each other to form at least one central bonding point in a central area of the electronic device and form at least one first bonding point in a first area of the electronic device. The first area is located outside the central area. A line width of the at least one first bonding point is greater than a line width of the at least one central bonding point.

In the foregoing, the step of bonding the plurality of first pins and the plurality of second pins to each other comprises bonding the plurality of first pins and the plurality of second pins to each other to form the at least one central bonding point in the central area of the electronic device, form the at least one first bonding point in the first area of the electronic device, and form at least one second bonding point in a second area of the electronic device. The second area is located outside the first area. A line width of the at least one second bonding point is greater than the line width of the at least one first bonding point.

In the foregoing, the step of bonding the plurality of first pins and the plurality of second pins to each other further comprises bonding the plurality of first pins and the plurality of second pins to each other so that the line width of the at least one central bonding point, the line width of the at least one first bonding point, and the line width of the at least one second bonding point present an arithmetic distribution.

In summary, the present disclosure provides an electronic device and a method for manufacturing an electronic device to improve the problem of increasing common difference as the length of the bonding area in the ultra-thin flexible substrate increases. In addition to that, the bonding accuracy can be improved.

DESCRIPTION OF THE EMBODIMENTS

Furthermore, it should be understood that the terms, “comprising”, “including”, “having”, “containing”, “involving” and the like, used herein are open-ended, that is, including but not limited to.

The terms used in this specification and claims, unless otherwise stated, generally have their ordinary meanings in the art, within the context of the disclosure, and in the specific context where each term is used. Certain terms that are used to describe the disclosure are discussed below, or elsewhere in the specification, to provide additional guidance to the practitioner skilled in the art regarding the description of the disclosure.

In some embodiments, in order to facilitate an understanding of a structure of an electronic device100according to the present disclosure, a description is provided with reference toFIG. 1toFIG. 3.FIG. 1depicts a pin diagram of a substrate according to some embodiments of the present disclosure.FIG. 2depicts a pin diagram of a flexible printed circuit board according to some embodiments of the present disclosure.FIG. 3depicts a schematic diagram of bonding points according to some embodiments of the present disclosure. A description is provided with reference toFIG. 1toFIG. 3. The electronic device100comprises a substrate120and a flexible printed circuit board220. In some embodiments, the electronic device100may be a panel or a display device.

A description is provided with reference toFIG. 1. The substrate120comprises a plurality of first pins110. A description is provided with reference toFIG. 2. The flexible printed circuit board220comprises a plurality of second pins210.

In some embodiments, the plurality of first pins110comprise pins of different line widths as shown inFIG. 1, for example, pins111, pins112, and pins113, as shown inFIG. 1.

In some embodiments, the plurality of second pins210comprise pins of different line widths as shown inFIG. 2, for example, pins211, pins212, and pins213, as shown inFIG. 2.

In some embodiments, in order to facilitate the understanding of the structure of the electronic device100according to the present disclosure, a description is provided with reference toFIG. 3toFIG. 4.FIG. 4depicts a schematic diagram of the bonding points of a modified embodiment of the embodiment shown inFIG. 3according to the present disclosure.

In some embodiments, a description is first provided with reference toFIG. 3.FIG. 3depicts a basic structure of the bonding points according to the present disclosure. As shown in the figure, a plurality of bonding points310comprise at least one central bonding point311and at least one first bonding point312. A line width of the at least one central bonding point311is W1. A line width of the at least one first bonding point312is W2. The line width W2of the at least one first bonding point312is greater than the line width W1of the at least one central bonding point311. A first spacing between the at least one central bonding point311and the at least one first bonding point312is D1.

Based on the basic structure of the bonding points depicted inFIG. 3,FIG. 4depicts a more complete application example of the bonding points of the modified embodiment of the embodiment shown inFIG. 3according to the present disclosure. As shown in the figure, at least one central bonding point311A is located in a central area A1of the electronic device100. At least one first bonding point312A is located in a first area A2of the electronic device100. The first area A2is located outside the central area A1. Similar to the basic structure of the bonding points depicted inFIG. 3, the line width W2of the at least one first bonding point312A located in the first area A2is similarly greater than the line width W1of the at least one central bonding point311A located in the central area A1.

A description is provided with reference toFIG. 4. In some embodiments, the at least one central bonding point311A comprises a plurality of central bonding points311A and is located in the central area A1. The line width W1of each of the plurality of central bonding points311A is equal. In some embodiments, the line width W1of each of the plurality of central bonding points311A is greater than or equal to 380 μm.

In some embodiments, the at least one first bonding point312A comprises a plurality of first bonding points312A and is located in the first area A2. The line width W2of each of the plurality of first bonding points312A is equal.

In some embodiments, a difference between the line width W1of each of the plurality of central bonding points311A and the line width W2of each of the plurality of first bonding points312A is equal. In addition, the difference between the line width W1of each of the plurality of central bonding points311A and the line width W2of each of the plurality of first bonding points312A is between 0 μm and 25 μm.

In some embodiments, a spacing between two adjacent central bonding points311A in the plurality of central bonding points311A is equal. In some embodiments, a spacing between two adjacent first bonding points312A in the plurality of first bonding points312A is equal.

In some embodiments, the spacing between two adjacent central bonding points311A in the plurality of central bonding points311A and the spacing between two adjacent first bonding points312A in the plurality of first bonding points312A are smaller than or equal to 380 μm.

In some embodiments, each of the plurality of central bonding points311A and each of the plurality of first bonding points312A are arranged on a same straight line.

In some embodiments, the electronic device100comprises a first side M1and a second side M2. The second side M2is opposite to the first side M1. It is noted that although inFIG. 4the first side M1and the second side M2are depicted as a left side and a right side, in practice the first side M1and the second side M2are not limited to the left side and the right side. Additionally, here a structure along a direction extending from the central line CL towards the first side M1is taken as an example for illustration. The first area A2is disposed adjacent to a central area A12and is located at a position adjacent to the central area A12and close to the first side M1.

In some embodiments, the electronic device100comprises the first side M1and the second side M2. The second side M2is opposite to the first side M1. The central area A12and the first area A2are arranged in an arrangement sequence from the second side M2to the first side M1of the electronic device100.

In some embodiments, a length of the central area A12(measured in the same direction as the line widths W1, W2, and W3are measured) is equal to a length (measured in the same direction as the line widths W1, W2, and W3are measured) of the first area A2. In some embodiments, the length of the central area A12and the length of first area A2are between 4.75 mm and 5.25 mm.

A description is provided with reference toFIG. 3. In some embodiments, the plurality of bonding points310further comprise at least one second bonding point313. A line width of the at least one second bonding point313is W3. The line width W3of the at least one second bonding point313is greater than the line width W2of the at least one first bonding point312. A second spacing between the at least one first bonding point312and the at least one second bonding point313is D2.

Similarly, based on the basic structure of the bonding points depicted inFIG. 3,FIG. 4depicts the bonding points of the modified embodiment of the embodiment shown inFIG. 3. As shown in the figure, at least one second bonding point313A comprises a plurality of second bonding points313A and is located in a second area A3of the electronic device100. The second area A3is located outside the first area A2. Similar to the basic structure of the bonding points depicted inFIG. 3, the line width W3of the at least one second bonding point313A located in the second area A3is greater than the line width W2of the at least one first bonding point312A located in the first area A2.

In some embodiments, the line width W1of the at least one central bonding point311A, the line width W2of the at least one first bonding point312A, and the line width W3of the at least one second bonding point313A present an arithmetic distribution. A common difference between the line width W1of the at least one central bonding point311A, the line width W2of the at least one first bonding point312A, and the line width W3of the at least one second bonding point313A is between 0 μm and 25 μm.

In some embodiments, the line width W1of the at least one central bonding point311A, the line width W2of the at least one first bonding point312A, and the line width W3of the at least one second bonding point313A are increased or decreased with the common difference.

It is noted that the slight differences between the line widths in the areas ofFIG. 4are difficult to be presented when the figure is depicted. In fact, the line widths ofFIG. 4show the modified embodiment based on the embodiment shown inFIG. 3, in which the line widths are increased or decreased with the common difference.

In some embodiments, the first spacing D1between the at least one central bonding point311A and the at least one first bonding point312A is equal to the second spacing D2between the at least one first bonding point312A and the at least one second bonding point313A. In some embodiments, both the first spacing D1and the second spacing D2are smaller than or equal to 380 μm.

In some embodiments, the at least one central bonding point311A, the at least one first bonding point312A, and the at least one second bonding point313A are arranged on the same straight line.

In some embodiments, the electronic device100comprises the first side M1and the second side M2. The second side M2is opposite to the first side M1. The at least one first bonding point312A comprises two first bonding points312A, and the first bonding points312A are respectively disposed in two first areas A2of the electronic device100. The at least one second bonding point313A comprises two second bonding points313A, and the second bonding points313A are respectively disposed in two second areas A3of the electronic device100. It is noted that here an overall structure ofFIG. 4is used for illustration. The second area A3, the first area A2, the central area A1, the first area A2, and the second area A3are arranged in an arrangement sequence from the second side M2to the first side M1of the electronic device100is.

In some embodiments, when taking into consideration the overall structure ofFIG. 4, the length of the first area A2is equal to a length of the second area A3, and a length of the central area A1is respectively two times the length of the first area A2and the length of the second area A3. In some embodiments, the length of first area A2and the length of the second area A3are between 4.75 mm and 5.25 mm. The length of the central area A1is between 9.5 mm and 10.5 mm.

FIG. 5depicts a flowchart of steps of a method for manufacturing an electronic device according to some embodiments of the present disclosure. In some embodiments, the method for manufacturing the electronic device500is used to bond a substrate (such as the substrate120ofFIG. 1) and a flexible printed circuit board (such as the flexible printed circuit board220ofFIG. 2) to each other so as to form a plurality of bonding points (such as the plurality of bonding points310shown inFIG. 3).

In step510, a plurality of first pins are disposed on the substrate.

For example, a description is provided with reference toFIG. 1. The plurality of first pins110are disposed on the substrate120.

In step520, a plurality of second pins are disposed on the flexible printed circuit board.

For example, a description is provided with reference toFIG. 2. The plurality of second pins210are disposed on the flexible printed circuit board220.

In step530, the plurality of first pins and the plurality of second pins are bonded to each other so as to form at least one central bonding point in a central area of the electronic device and form at least one first bonding point in a first area of the electronic device. The first area is located outside the central area. A line width of the at least one first bonding point is greater than a line width of the at least one central bonding point.

For example, a description is provided with reference toFIG. 1toFIG. 4. The plurality of first pins110and the plurality of second pins210are bonded to each other so as to form the at least one central bonding point311A in the central area A1of the electronic device100and form the at least one first bonding point312A in a first area A2of the electronic device100. The first area A2is located outside the central area A1. The line width W2of the at least one first bonding point312A is greater than the line width W1of the at least one central bonding point311A.

In some embodiments, the above step530comprises the following operation: bonding the plurality of first pins and the plurality of second pins to each other so as to form the at least one central bonding point in the central area of the electronic device, form the at least one first bonding point in the first area of the electronic device, and form at least one second bonding point in a second area of the electronic device. The second area is located outside the first area. A line width of the at least one second bonding point is greater than the line width of the at least one first bonding point.

For example, a description is provided with reference toFIG. 1toFIG. 4. The plurality of first pins110and the plurality of second pins210are bonded to each other so as to form the at least one central bonding point311A in the central area A1of the electronic device100, form the at least one first bonding point312A in the first area A2of the electronic device100, and form the at least one second bonding point313A in the second area A3of the electronic device100. The second area A3is located outside the first area A2. The line width W3of the at least one second bonding point313A is greater than the line width W2of the at least one first bonding point312A.

In some embodiments, the above step530further comprises the following operation: bonding the plurality of first pins and the plurality of second pins to each other so that the line width of the at least one central bonding point, the line width of the at least one first bonding point, and the line width of the at least one second bonding point present an arithmetic distribution.

For example, a description is provided with reference toFIG. 1toFIG. 4. The plurality of first pins110and the plurality of second pins210are bonded to each other so that the line width W1of the at least one central bonding point311A, the line width W2of the at least one first bonding point312A, and the line width W3of the at least one second bonding point313A present the arithmetic distribution.

In some embodiments, a description is provided with reference toFIG. 4. A bonding area is between the first side M1and the second side M2. In practice, a length of the bonding area is 50.43 mm. After adopting the method for manufacturing the electronic device500according to the present disclosure, the length of the bonding area is shortened from 50.43 mm to 49.79 mm, which makes the design space 0.64 mm larger.

Based on the above embodiments, the present disclosure provides an electronic device and a method for manufacturing an electronic device to improve the problem of increasing common difference as the length of the bonding area in the ultra-thin flexible substrate increases. In addition to that, the bonding accuracy can be improved.