Double-layer film structure for improving alignment precision of ITO (Indium Tin Oxide) pattern

Abstract

The utility model discloses a double-layer film structure capable of improving the alignment precision of an ITO (Indium Tin Oxide) pattern, which comprises a film base material, a cutting line is arranged in the middle of the film base material, and the film base material is cut into an induction layer film and a driving layer film which are independent from each other through the cutting line; the surface of the induction layer film is provided with a plurality of induction layer pattern manufacturing areas with the same size, and the induction layer pattern manufacturing areas are provided with induction layer ITO patterns and induction layer silver paste wires; the film base material can be cut into two halves after the film base material is manufactured, the sensing layer film and the driving layer film are obtained respectively, and finally the film and the driving layer film are attached, and due to the fact that all the manufacturing processes are completed on the same film base material, the silk-screen deviation caused by two times of ITO pattern silk-screen can be effectively reduced, and the production efficiency is improved. Therefore, the position deviation condition of the sensing layer ITO pattern and the driving layer ITO pattern can be greatly reduced, and the quality and the performance of the touch screen can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of double-layer film touch screens, in particular to a double-layer film structure for improving the alignment accuracy of ITO patterns. Background Art

[0002] Existing touch screens are divided into two categories, one is a glass structure touch screen, and the other is a film structure touch screen. After continuous development and research, the film structure touch screen technology is becoming more and more mature.

[0003] In the manufacturing process of traditional double-layer film structure touch screen, it is necessary to make wiring lines on two independent ITO films, including the sensing layer ITO pattern and the driving layer ITO pattern, and complete the production by silk-screening silver paste wiring and insulating oil. Then, during the bonding process, the two films need to be aligned by silver paste alignment marks. However, this method will cause a large position deviation between the two ITO patterns, such as Figure 6 As shown, the quality and performance of the touch screen are affected, making it difficult to meet the company's high quality standards. Utility Model Content

[0004] The utility model aims to overcome the above-mentioned shortcomings and provide a technical solution that can solve the above-mentioned problems.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a double-layer film structure for improving the alignment accuracy of ITO patterns, comprising a film substrate, a cutting line is arranged in the middle of the film substrate, and the film substrate is cut into two independent sensing layer films and driving layer films by the cutting line; a plurality of sensing layer pattern production areas of the same size are arranged on the surface of the sensing layer film, and a sensing layer ITO pattern and a sensing layer silver paste wiring are arranged on the sensing layer pattern production area; a plurality of driving layer pattern production areas of the same size are arranged on the surface of the driving layer film, and a driving layer ITO pattern and a driving layer silver paste wiring are arranged on the driving layer pattern production area.

[0006] As a further solution of the utility model: the sensing layer film and the driving layer film are of the same size, and the sensing layer pattern making area on the sensing layer film and the driving layer pattern making area on the driving layer film are of the same size.

[0007] As a further solution of the utility model: an upper layer OCA is arranged on the sensing layer film, a lower layer OCA is arranged on the driving layer film, and the driving layer film is attached to the bottom of the sensing layer film through the lower layer OCA.

[0008] As a further solution of the utility model: a silver paste alignment mark 1 is arranged at one corner of the sensing layer pattern production area, and a silver paste alignment mark 2 is arranged at a corner of the sensing layer pattern production area that is diagonally opposite to the silver paste alignment mark 1.

[0009] As a further solution of the utility model: a silver paste alignment mark three is arranged at one corner of the driving layer pattern making area, and a silver paste alignment mark four is arranged at a corner of the driving layer pattern making area which is diagonally opposite to the silver paste alignment mark three.

[0010] As a further solution of the utility model: when the sensing layer film and the driving layer film are stacked together, the silver paste alignment mark 1 on the sensing layer pattern making area is aligned with the silver paste alignment mark 4 on the driving layer pattern making area, and the silver paste alignment mark 2 on the sensing layer pattern making area is aligned with the silver paste alignment mark 3 on the driving layer pattern making area.

[0011] As a further solution of the utility model: the sensing layer ITO pattern is placed near the middle of the sensing layer pattern making area, the driving layer ITO pattern is placed near the middle of the driving layer pattern making area, and the sensing layer ITO pattern is aligned with the driving layer pattern making area.

[0012] As a further solution of the utility model: the sensing layer ITO pattern is vertical, and the driving layer ITO pattern is vertical. When the sensing layer film and the driving layer film are stacked together, the sensing layer ITO pattern and the driving layer ITO pattern are cross-arranged, and there is a position deviation between the sensing layer ITO pattern and the driving layer ITO pattern.

[0013] As a further solution of the utility model: the silver paste wiring of the sensing layer is connected to the ITO pattern of the sensing layer, and the silver paste wiring of the driving layer is connected to the ITO pattern of the driving layer.

[0014] As a further solution of the utility model: the sensing layer silver paste routing and the driving layer silver paste routing are both designed to be L-shaped, and after the sensing layer film and the driving layer film are stacked together, the sensing layer silver paste routing is located on the inner side of the driving layer silver paste routing.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0016] In the present application, through the designed film substrate, half of the film substrate can be used to make the sensing layer film, and the other half of the film substrate can be used to make the driving layer film. During the production process, the ITO pattern, silk-screen silver paste and insulating oil on the sensing layer film and the driving layer film are all produced at the same time, and then the film substrate is cut into two halves to obtain the sensing layer film and the driving layer film respectively, and finally they are bonded. Since all the production processes are completed on the same film substrate, the silk-screen deviation caused by the two silk-screen printings of the ITO pattern can be effectively reduced. Therefore, the position deviation of the sensing layer ITO pattern and the driving layer ITO pattern can be greatly reduced, which can effectively improve the quality and performance of the touch screen. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the top view structure of the film substrate of the utility model;

[0018] Figure 2 This is a schematic diagram of the top view of the induction layer film of the utility model;

[0019] Figure 3 It is a schematic diagram of the top view structure of the driving layer film of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the utility model after the ITO pattern of the sensing layer and the ITO pattern of the driving layer are overlapped and aligned;

[0021] Figure 5 It is a schematic diagram of the position deviation between the ITO pattern of the sensing layer and the ITO pattern of the driving layer after the sensing layer film and the driving layer film are attached to each other in the utility model;

[0022] Figure 6 It is a schematic diagram of the position deviation structure of the sensing layer ITO pattern and the driving layer ITO pattern after the sensing layer film and the driving layer film are bonded together in the prior art.

[0023] The reference numerals and names in the figures are as follows:

[0024] 1. Film substrate; 101. Sensing layer film; 102. Driving layer film; 2. Sensing layer pattern production area; 3. Sensing layer ITO pattern; 4. Sensing layer silver paste routing; 5. Silver paste alignment mark one; 6. Silver paste alignment mark two; 7. Driving layer pattern production area; 8. Driving layer ITO pattern; 9. Driving layer silver paste routing; 10. Silver paste alignment mark three; 11. Silver paste alignment mark four; 12. Upper layer OCA; 13. Lower layer OCA. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] See also Figure 1-6 A double-layer film structure for improving the alignment accuracy of an ITO pattern comprises a film substrate 1, a cutting line is arranged in the middle of the film substrate 1, and the film substrate 1 is cut into two independent sensing layer films 101 and a driving layer film 102 by the cutting line. By pre-setting the cutting line, the film substrate 1 can be divided into sensing layer films 101 and driving layer films 102 of equal size before cutting, so as to facilitate subsequent alignment and lamination; a plurality of sensing layer pattern production areas 2 of the same size are arranged on the surface of the sensing layer film 101, and a sensing layer ITO pattern 3 and a sensing layer silver paste wiring 4 are arranged on the sensing layer pattern production area 2; a plurality of driving layer pattern production areas 7 of the same size are arranged on the surface of the driving layer film 102, and a driving layer ITO pattern 8 and a driving layer silver paste wiring 9 are arranged on the driving layer pattern production area 7.

[0027] Specifically, since all the manufacturing processes are completed on the same film substrate 1, the silk screen printing deviation caused by the need to perform two ITO pattern silk screens in the existing technology can be effectively reduced. Therefore, the position deviation between the sensing layer ITO pattern 3 and the driving layer ITO pattern 8 can be greatly reduced, which can effectively improve the quality and performance of the touch screen.

[0028] See also Figure 1-3 In this embodiment, the sensing layer film 101 and the driving layer film 102 have the same size, and the sensing layer pattern making area 2 on the sensing layer film 101 and the driving layer pattern making area 7 on the driving layer film 102 have the same size.

[0029] Specifically, the sensing layer film 101 and the driving layer film 102 are of the same size, which is conducive to setting the sensing layer pattern making area 2 and the driving layer pattern making area 7 of the same size in the sensing layer film 101 and the driving layer film 102, which is convenient for subsequent production. The sensing layer pattern making area 2 and the driving layer pattern making area 7 are of the same size, which facilitates the subsequent precise alignment and fitting of the sensing layer pattern making area 2 and the driving layer pattern making area 7.

[0030] See also Figure 5 In this embodiment, an upper layer OCA12 is disposed on the sensing layer film 101 , a lower layer OCA13 is disposed on the driving layer film 102 , and the driving layer film 102 is attached to the bottom of the sensing layer film 101 through the lower layer OCA13 .

[0031] Specifically, the designed upper layer OCA 12 can be conveniently used for subsequent bonding with other components, and the lower layer OCA 13 can enable the sensing layer film 101 to be bonded to the driving layer film 102 to form a double-layer structure.

[0032] See also Figure 2-3 In the present embodiment, a silver paste alignment mark 1 5 is provided at one corner on the sensing layer pattern making area 2, and a silver paste alignment mark 2 6 is provided at a corner on the sensing layer pattern making area 2 and diagonally opposite to the silver paste alignment mark 1 5; a silver paste alignment mark 3 10 is provided at one corner on the driving layer pattern making area 7, and a silver paste alignment mark 4 11 is provided at a corner on the driving layer pattern making area 7 and diagonally opposite to the silver paste alignment mark 3 10; when the sensing layer film 101 and the driving layer film 102 are stacked together, the silver paste alignment mark 1 5 on the sensing layer pattern making area 2 is aligned with the silver paste alignment mark 4 11 on the driving layer pattern making area 7, and the silver paste alignment mark 2 6 on the sensing layer pattern making area 2 is aligned with the silver paste alignment mark 3 10 on the driving layer pattern making area 7.

[0033] Specifically, by setting the silver paste alignment mark 1 5, the silver paste alignment mark 2 6, the silver paste alignment mark 3 10 and the silver paste alignment mark 4 11, the silver paste alignment mark 1 5 can be aligned with the silver paste alignment mark 4 11, and the silver paste alignment mark 2 6 can be aligned with the silver paste alignment mark 4 11, thereby ensuring precise fitting, which can improve the alignment accuracy of the sensing layer ITO pattern 3 and the driving layer ITO pattern 8, thereby further reducing the position deviation of the sensing layer ITO pattern 3 and the driving layer ITO pattern 8.

[0034] See also Figure 2-4 In this embodiment, the sensing layer ITO pattern 3 is placed near the middle of the sensing layer pattern making area 2, and the driving layer ITO pattern 8 is placed near the middle of the driving layer pattern making area 7, and the sensing layer ITO pattern 3 is aligned with the driving layer pattern making area 7; the sensing layer ITO pattern 3 is vertical, and the driving layer ITO pattern 8 is vertical. When the sensing layer film 101 and the driving layer film 102 are stacked together, the sensing layer ITO pattern 3 and the driving layer ITO pattern 8 are cross-arranged, and there is a position deviation between the sensing layer ITO pattern 3 and the driving layer ITO pattern 8.

[0035] Specifically, the sensing layer ITO pattern 3 is vertical, and the driving layer ITO pattern 8 is vertical, so that the sensing layer ITO pattern 3 and the driving layer ITO pattern 8 can overlap in a cross-shaped manner. When the sensing layer ITO pattern 3 and the driving layer ITO pattern 8 overlap, the position deviation between the sensing layer ITO pattern 3 and the driving layer ITO pattern 8 is small, but this deviation distance is smaller than that of the prior art (such as Figure 6The position deviation produced by the touch screen is smaller, thereby significantly improving the quality and performance of the touch screen.

[0036] See also Figure 2-4 In this embodiment, the sensing layer silver paste routing 4 is connected to the sensing layer ITO pattern 3, and the driving layer silver paste routing 9 is connected to the driving layer ITO pattern 8; the sensing layer silver paste routing 4 and the driving layer silver paste routing 9 are both designed to be L-shaped, and after the sensing layer film 101 and the driving layer film 102 are stacked together, the sensing layer silver paste routing 4 is located on the inner side of the driving layer silver paste routing 9.

[0037] Specifically, through the structural design of the sensing layer silver paste routing 4 and the sensing layer silver paste routing 4, after the sensing layer film 101 and the driving layer film 102 are overlapped, the sensing layer silver paste routing 4 can be located on the inner side of the driving layer silver paste routing 9 and routed in one direction, which is beneficial to improving the regularity of the routing and is also convenient for subsequent use.

[0038] When in use: first prepare a complete film substrate 1, then complete the production of the sensing layer ITO pattern 3, the sensing layer silver paste wiring 4, the driving layer ITO pattern 8, and the driving layer silver paste wiring 9 on the multiple sensing layer pattern production areas 2 on the sensing layer film 101 and the driving layer pattern production area 7 on the driving layer film 102, and finally cut the film substrate 1 into two halves to obtain the sensing layer film 101 and the driving layer film 102 respectively, and finally perform lamination;

[0039] During lamination, the sensing layer film 101 is laminated on the lower OCA 13 on the driving layer film 102, and the silver paste alignment mark 1 5 is aligned with the silver paste alignment mark 4 11, and the silver paste alignment mark 2 6 is aligned with the silver paste alignment mark 3 10. At this time, the sensing layer ITO pattern 3 and the driving layer ITO pattern 8 are arranged in a cross pattern (the lamination is completed as shown in FIG. Figure 4 As shown), and the position deviation between them is smaller than that of the prior art (see Figure 5 and Figure 6 comparison).

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A double-layer film structure for improving the alignment accuracy of an ITO pattern, characterized in that: It comprises a film substrate (1), wherein a cutting line is provided in the middle of the film substrate (1), and the film substrate (1) is cut into two independent sensing layer films (101) and driving layer films (102) through the cutting line; The surface of the sensing layer film (101) is provided with a plurality of sensing layer pattern production areas (2) of the same size, and the sensing layer pattern production areas (2) are provided with sensing layer ITO patterns (3) and sensing layer silver paste wiring (4); A plurality of drive layer pattern production areas (7) of the same size are arranged on the surface of the drive layer film (102), and a drive layer ITO pattern (8) and a drive layer silver paste wiring (9) are arranged on the drive layer pattern production area (7).

2. A double-layer film structure for improving the alignment accuracy of an ITO pattern according to claim 1, characterized in that: The sensing layer film (101) and the driving layer film (102) are of the same size, and the sensing layer pattern production area (2) on the sensing layer film (101) and the driving layer pattern production area (7) on the driving layer film (102) are of the same size.

3. A double-layer film structure for improving the alignment accuracy of an ITO pattern according to claim 1, characterized in that: An upper OCA (12) is arranged on the sensing layer film (101), a lower OCA (13) is arranged on the driving layer film (102), and the driving layer film (102) is attached to the bottom of the sensing layer film (101) via the lower OCA (13).

4. A double-layer film structure for improving the alignment accuracy of an ITO pattern according to claim 1, characterized in that: A silver paste alignment mark 1 (5) is arranged at one corner of the sensing layer pattern production area (2), and a silver paste alignment mark 2 (6) is arranged at a corner of the sensing layer pattern production area (2) that is diagonally opposite to the silver paste alignment mark 1 (5).

5. A double-layer film structure for improving the alignment accuracy of an ITO pattern according to claim 4, characterized in that: A silver paste alignment mark three (10) is arranged at one corner of the driving layer pattern production area (7), and a silver paste alignment mark four (11) is arranged at a corner of the driving layer pattern production area (7) that is diagonally opposite to the silver paste alignment mark three (10).

6. A double-layer film structure for improving the alignment accuracy of an ITO pattern according to claim 4, characterized in that: When the sensing layer film (101) and the driving layer film (102) are stacked together, the first silver paste alignment mark (5) on the sensing layer pattern making area (2) is aligned with the fourth silver paste alignment mark (11) on the driving layer pattern making area (7), and the second silver paste alignment mark (6) on the sensing layer pattern making area (2) is aligned with the third silver paste alignment mark (10) on the driving layer pattern making area (7).

7. A double-layer film structure for improving the alignment accuracy of an ITO pattern according to claim 1, characterized in that: The sensing layer ITO pattern (3) is placed near the middle of the sensing layer pattern production area (2), the driving layer ITO pattern (8) is placed near the middle of the driving layer pattern production area (7), and the sensing layer ITO pattern (3) and the driving layer pattern production area (7) are arranged in alignment.

8. The double-layer film structure for improving the alignment accuracy of ITO pattern according to claim 1, characterized in that: The sensing layer ITO pattern (3) is vertical, and the driving layer ITO pattern (8) is vertical. When the sensing layer film (101) and the driving layer film (102) are stacked together, the sensing layer ITO pattern (3) and the driving layer ITO pattern (8) are arranged in a cross-arrangement, and there is a position deviation between the sensing layer ITO pattern (3) and the driving layer ITO pattern (8).

9. A double-layer film structure for improving the alignment accuracy of an ITO pattern according to claim 1, characterized in that: The sensing layer silver paste wiring (4) is connected to the sensing layer ITO pattern (3), and the driving layer silver paste wiring (9) is connected to the driving layer ITO pattern (8).

10. The double-layer film structure for improving the alignment accuracy of ITO pattern according to claim 1, characterized in that: The sensing layer silver paste wiring (4) and the driving layer silver paste wiring (9) are both designed to be L-shaped, and after the sensing layer film (101) and the driving layer film (102) are stacked together, the sensing layer silver paste wiring (4) is located on the inner side of the driving layer silver paste wiring (9).

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