Binding area structure of OGS touch screen

Abstract

The utility model discloses an OGS touch screen binding area structure. The OGS touch screen binding area structure comprises a substrate, a base layer, a first ink layer, a shadow eliminating layer and a second ink layer which are sequentially arranged from bottom to top. A binding windowing part is arranged on the second ink layer, a step part is formed between the binding windowing part and the second ink layer, the step part is connected with the sunken structure, and the sunken structure is located on the second ink layer. According to the utility model, the concave structure is arranged on the second ink layer, so that the ink segment difference is reduced, and the exhaust area is increased, and therefore, the binding windowing part can be helped to exhaust, and the yield and reliability of products can be improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of OGS, and in particular relates to an OGS touch screen binding area structure. Background Art

[0002] The OGS touch screen is connected to the FPC (Flexible Printed Circuit) through the Bonding process to achieve the electrical connection between the touch screen touch PIN pin and the FPC PIN pin, wherein the bonding process is to achieve the electrical connection between the touch screen touch PIN pin and the FPC PIN pin through ACF (conductive adhesive). The binding position structure on the existing OGS touch screen includes a glass cover layer, a frame ink layer, a first shadow elimination layer, a binding area and a second ink layer stacked in sequence, wherein the second ink layer needs to be processed by window opening to expose the binding area. However, due to the structural limitations of the existing OGS touch screen, there will be an ink step difference at the edge of the window opening of the touch screen binding area to form a step portion. During the bonding and pressing process of the touch PIN pin and the FPC PIN pin in the window opening of the binding area through conductive adhesive, the gas between the two PIN pins (gold fingers) will be blocked by the ink step difference (step difference height 10~15um) and is not easy to discharge, and finally a binding bubble along the ink step difference is formed in the conductive adhesive, which poses a reliability risk. In addition, under a certain temperature and humidity environment, external water vapor will enter the conductive adhesive through the gaps between the binding bubbles, causing the binding bubbles to further expand and enlarge, thereby causing corrosion of the metal layer of the binding PIN pin and separation of the PIN pin, resulting in failure of the electrical connection function.

[0003] CN 215526638 U discloses an OGS binding position structure, comprising a glass cover layer, a frame ink layer, a first shadow elimination layer, a binding pin layer and a second shadow elimination layer stacked in sequence, wherein the second shadow elimination layer needs to be windowed to expose the binding pin layer, and a protective layer is stacked between the first shadow elimination layer and the binding pin layer. The OGS binding position structure can prevent the first shadow elimination layer from being etched by etching paste when the window of the second shadow elimination layer is made, so as to prevent the appearance of the OGS touch screen from having a different color at the binding position.

[0004] CN115220607B discloses an OGS capacitive touch screen and a manufacturing method thereof. The OGS capacitive touch screen structure comprises a glass cover plate, a conductive layer of niobium pentoxide, silicon dioxide, and indium tin oxide upper line, a conductive layer of copper, titanium, or silver upper line, a silicon dioxide insulating barrier layer, a conductive layer of niobium pentoxide, silicon dioxide, and indium tin oxide lower line, and a conductive layer of copper, titanium, or silver lower line; the outer sides of the copper, titanium, or silver upper line and the copper, titanium, or silver lower line are provided with a flexible printed circuit board binding position. The structure has the advantages of narrower frame, thinner thickness, lighter weight, and more stable performance.

[0005] From the above, it can be seen that there is no solution to the problem of bubbles easily generated in the binding area in the prior art. Therefore, it is necessary to provide an OGS touch screen binding area structure to help solve the problem that the gas cannot be smoothly discharged during the binding and pressing process due to the ink step difference at the edge of the binding area, thereby forming binding bubbles in the conductive adhesive, causing corrosion of the metal layer of the binding PIN pin and separation of the PIN pin, resulting in failure of the electrical connection function. Summary of the invention

[0006] In view of the above technical problems, the utility model provides an OGS touch screen binding area structure, which reduces the ink step difference and increases the exhaust area by setting a recessed structure on the second ink layer, thereby helping to exhaust the binding window part and improving the yield and reliability of the product.

[0007] In order to achieve the above-mentioned purpose, the utility model provides an OGS touch screen binding area structure, including a substrate, a base layer, a first ink layer, an elimination layer and a second ink layer arranged in sequence from bottom to top; a binding window portion is provided on the second ink layer, a step portion is formed between the binding window portion and the second ink layer, the step portion is connected to a recessed structure, and the recessed structure is located on the second ink layer.

[0008] Preferably, a patterned electrode is provided in the binding window, and the patterned electrode is connected to the touch PIN pin.

[0009] Further preferably, conductive glue is provided outside the patterned electrode and the touch PIN pin, the conductive glue is connected to the FPC PIN pin, and an FPC is provided on a side of the FPC PIN pin away from the substrate.

[0010] More preferably, the conductive adhesive is ACF.

[0011] Preferably, the side of the recessed structure close to the step portion is an inclined surface to discharge bubbles.

[0012] Further preferably, the slope angle between the inclined surface and the shadow elimination layer is 10°-25°.

[0013] Further preferably, the recessed structure is in the shape of multiple arcs and / or polygons.

[0014] Preferably, the shadow-eliminating layer is a 1M1 shadow-eliminating layer.

[0015] Preferably, the substrate is a glass substrate.

[0016] The beneficial effects of the utility model are:

[0017] 1. By setting a concave structure on the second ink layer, the problem that the bubbles generated in the binding and pressing process cannot be discharged due to the easy formation of step parts between the binding window parts formed after the second ink layer is processed by window opening is solved, and the low product reliability caused by the binding bubbles along the ink step difference in the conductive adhesive is improved. In addition, under a certain temperature and humidity environment, the OGS touch screen is prevented from having external water vapor enter the conductive adhesive along the gap between the binding bubbles, thereby further expanding and enlarging the bubbles, causing the corrosion of the metal layer of the binding PIN pin and the separation of the touch PIN pin, thereby reducing the occurrence of electrical connection function failure.

[0018] 2. The overall slope angle of the concave structure and the shadow elimination layer is 10-25°, and it is a multi-segment arc, polygon or a combination of the two, which can increase the exhaust area, reduce the ink step difference, form an exhaust channel, and help bind the window opening for exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure 2 Schematic diagram of the shape of the concave structure; in the figure, A is a multi-segment arc structure, B is a triangular structure, C is a trapezoidal structure, D is a structure combining multiple arcs and triangles, and E is a structure combining multiple arcs and trapezoids.

[0021] Figure 3 It is a structural diagram of the binding window part.

[0022] In the figure, 1 is a substrate, 2 is a base layer, 3 is a first ink layer, 4 is an elimination layer, 5 is a second ink layer, 6 is a step portion, 7 is a touch PIN foot, 8 is an FPC PIN foot, 9 is an FPC, 10 is a patterned electrode, 11 is an air bubble, 12 is a conductive adhesive, and 13 is a recessed structure. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further explained below in conjunction with the accompanying drawings and specific embodiments. It is worth noting that the following embodiments are only preferred embodiments of the utility model and should not be understood as limiting the utility model. The protection scope of the utility model shall be based on the content recorded in the claims. Any modification or replacement made by a person skilled in the art to the technical solution of the utility model without creative work shall fall within the protection scope of the utility model.

[0024] Example 1

[0025] An OGS touch screen binding area structure comprises a substrate 1, a base layer 2, a first ink layer 3, an erasing layer 4 and a second ink layer 5 which are arranged in sequence from bottom to top; a binding window portion is provided on the second ink layer 5 for exposing a touch PIN foot 7; a step portion 6 is formed between the binding window portion and the second ink layer 5, the step portion 6 is connected to a recessed structure 13, and the recessed structure 13 is located on the second ink layer 5 to increase the exhaust area, reduce the ink step difference, and help the binding window portion to exhaust.

[0026] Preferably, a patterned electrode 10 is provided in the binding window, and the patterned electrode 10 is connected to the touch PIN pin 7 .

[0027] Further preferably, a conductive adhesive 12 is provided outside the patterned electrode 10 and the touch PIN pin 7 , the conductive adhesive 12 is connected to the FPC PIN pin 8 , and an FPC 9 is provided on a side of the FPC PIN pin 8 away from the substrate 1 .

[0028] More preferably, the conductive adhesive 12 is ACF.

[0029] Preferably, a side of the recessed structure 13 close to the step portion 6 is an inclined surface to discharge the bubbles 11 .

[0030] Further preferably, the slope angle between the inclined surface and the shadow elimination layer 4 is 10°-25°, so as to increase the exhaust area and reduce the ink step difference, thereby helping to discharge the bubbles 11.

[0031] Further preferably, the concave structure 13 is a multi-segment arc and / or polygonal shape, forming an airflow channel with the outside world, so that the bubbles 11 generated after binding and pressing can be smoothly discharged through the inclined surface and airflow channel formed on the concave structure 13, thereby improving the poor binding of bubbles and improving the reliability of the product.

[0032] Preferably, the shadow elimination layer 4 is a 1M1 shadow elimination layer.

Claims

1. An OGS touch screen binding area structure, characterized in that: The invention comprises a substrate (1), a base layer (2), a first ink layer (3), an image elimination layer (4) and a second ink layer (5) which are arranged in sequence from bottom to top; the second ink layer (5) is provided with a binding window portion, a step portion (6) is formed between the binding window portion and the second ink layer (5), the step portion (6) is connected to a recessed structure (13), and the recessed structure (13) is located on the second ink layer (5).

2. The OGS touch screen binding area structure according to claim 1, characterized in that: A patterned electrode (10) is provided in the binding window, and the patterned electrode (10) is connected to the touch PIN foot (7).

3. The OGS touch screen binding area structure according to claim 2, characterized in that: Conductive glue (12) is provided outside the patterned electrode (10) and the touch PIN pin (7), the conductive glue (12) is connected to the FPC PIN pin (8), and an FPC (9) is provided on the side of the FPC PIN pin (8) away from the substrate (1).

4. The OGS touch screen binding area structure according to claim 3, characterized in that: The conductive adhesive (12) is ACF.

5. The OGS touch screen binding area structure according to claim 1, characterized in that: The side of the recessed structure (13) close to the step portion (6) is an inclined surface for discharging air bubbles (11).

6. The OGS touch screen binding area structure according to claim 5, characterized in that: The slope angle between the inclined surface and the shadow elimination layer (4) is 10°-25°.

7. An OGS touch screen binding area structure according to claim 1 or 5, characterized in that: The recessed structure (13) is in the shape of multiple arcs and / or polygons.

8. The OGS touch screen binding area structure according to claim 1, characterized in that: The image elimination layer (4) is a 1M1 image elimination layer.

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