High-reliability touch screen structure

Abstract

The utility model discloses a touch screen structure with high reliability. The touch screen structure comprises a protective cover plate; the touch circuit layer is arranged on the protective cover plate and comprises a binding area, and the binding area comprises at least one binding pin; the peelable adhesive layer is arranged on the binding area of the touch circuit layer; and the inorganic nonmetal oxide layer is arranged on the touch circuit layer and the peelable adhesive layer. According to the touch screen structure, the binding pins in the binding area can be prevented from being scratched by foreign objects or corroded and oxidized by water vapor before binding.

Description

Technical Field

[0001] The utility model relates to the field of touch, in particular to a touch screen structure with high reliability. Background Art

[0002] OGS (One Glass Solution) touch screen is an electronic product protection screen that forms ITO (Indium Tin Oxides) conductive film and sensors directly on the protective glass. It is mainly a piece of glass that plays the dual role of protective glass and touch sensor electrode. Compared with GG touch screen, OGS touch screen is cheaper, has a simpler process, and better control over the timely delivery of products. Therefore, OGS touch screen gradually replaces GG touch screen and is widely used in electronic products such as car TP (Touch Pad).

[0003] In order to prevent the metal traces of the OGS touch screen from being corroded by water vapor, the patent application number is CN. The Chinese patent No. 202021032495.3 discloses a low-cost and high-reliability OGS touch screen, comprising: a substrate; a conductive pattern layer, the conductive pattern layer is arranged on the substrate; a metal trace, the metal trace is arranged on the substrate, located at the periphery of the conductive pattern layer and electrically connected to the conductive pattern layer; a silicon dioxide layer or a silicon nitride layer, the silicon dioxide layer or the silicon nitride layer covers the metal trace and the conductive pattern layer. The OGS touch screen prevents the metal trace from being corroded and oxidized by water vapor by covering the silicon dioxide layer or the silicon nitride layer on the metal trace and the conductive pattern layer.

[0004] However, the OGS touch screen has a binding area, which needs to be bound to the flexible circuit board through the binding area, and then electrically connected to the control main board through the flexible circuit board. Therefore, the silicon dioxide layer or silicon nitride layer needs to avoid exposing the binding area during production. This causes the binding pins in the binding area to be easily scratched by foreign objects or corroded and oxidized by water vapor during the transfer and storage process before binding. Utility Model Content

[0005] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a touch screen structure with high reliability, which can prevent the binding pins in the binding area from being scratched by foreign objects or corroded and oxidized by water vapor before binding.

[0006] The technical problem to be solved by the utility model is achieved through the following technical solutions:

[0007] A high-reliability touch screen structure, comprising:

[0008] Protective cover;

[0009] A touch circuit layer is disposed on the protective cover plate and includes a binding area, wherein the binding area includes at least one binding pin;

[0010] A peelable adhesive layer is disposed on the binding area of ​​the touch circuit layer;

[0011] The inorganic non-metallic oxide layer is arranged on the touch circuit layer and the peelable adhesive layer.

[0012] Furthermore, the thickness of the peelable adhesive layer is 0.03-0.05 mm.

[0013] Furthermore, the peelable adhesive layer is provided with a hand-held tear strip, and the hand-held tear strip extends outside the protective cover.

[0014] Furthermore, the inorganic non-metallic oxide layer includes a plurality of inorganic non-metallic oxide film layers, and the thickness of each inorganic non-metallic oxide film layer is between 10-20 μm.

[0015] Furthermore, the inorganic non-metallic oxide layer includes at least one of a silicon oxide film layer, a silicon nitride film layer and a silicon oxynitride film layer.

[0016] Furthermore, the touch circuit layer is an OGS circuit layer, a GG circuit layer or a GF circuit layer.

[0017] Furthermore, the touch circuit layer includes a touch sensing area and a peripheral routing area, the peripheral routing area surrounds the touch sensing area, and the binding area is located on a side edge of the peripheral routing area; the touch sensing area includes at least one touch sensing electrode, and the peripheral routing area includes at least one metal routing, and each touch sensing electrode is electrically connected to a corresponding binding pin through a corresponding metal routing.

[0018] Furthermore, the protective cover is provided with light-shielding ink at a position corresponding to the peripheral wiring area.

[0019] Furthermore, the light-shielding ink is black ink.

[0020] Furthermore, the protective cover is a glass cover.

[0021] The utility model has the following beneficial effects: the touch screen structure of the utility model is provided with a peelable adhesive layer on the binding area of ​​the touch circuit layer, and the inorganic non-metallic oxide layer does not need to avoid the binding area during production, and directly covers the touch circuit layer and the peelable adhesive layer on the binding area, so that the inorganic non-metallic oxide layer can temporarily protect the binding area before the binding area is bound to the flexible circuit board, so as to avoid the binding pins in the binding area from being scratched by foreign objects or corroded and oxidized by water vapor during the transfer and storage process before binding. When the binding area is bound to the flexible circuit board, the peelable adhesive layer and the inorganic non-metallic oxide layer on the peelable adhesive layer are peeled off and removed together to expose the binding pins in the binding area. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the stacking structure of the touch screen structure provided by the utility model.

[0023] Figure 2 This is a schematic diagram of the planar structure of the touch circuit layer in the touch screen structure provided by the utility model. DETAILED DESCRIPTION

[0024] The present invention is described in detail below in conjunction with the accompanying drawings and embodiments, examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Embodiment 1

[0029] like Figure 1 and 2 As shown, a high-reliability touch screen structure includes:

[0030] Protective cover 1;

[0031] A touch circuit layer 3 is disposed on the protective cover 1 and includes a binding area 33 , wherein the binding area 33 includes at least one binding pin 330 ;

[0032] A peelable adhesive layer 4 is disposed on the binding area 33 of the touch circuit layer 3;

[0033] The inorganic non-metallic oxide layer 5 is disposed on the touch circuit layer 3 and the peelable adhesive layer 4 .

[0034] The touch screen structure of the utility model is provided with a removable adhesive layer 4 on the binding area 33 of the touch circuit layer 3. The inorganic non-metallic oxide layer 5 does not need to avoid the binding area 33 during production, and directly covers the touch circuit layer 3 and the removable adhesive layer 4 on the binding area 33, so that the inorganic non-metallic oxide layer 5 can temporarily protect the binding area 33 before the binding area 33 is bound to the flexible circuit board, so as to prevent the binding pins 330 in the binding area 33 from being scratched by foreign objects or corroded and oxidized by water vapor during the transfer and storage process before binding. When the binding area 33 is bound to the flexible circuit board, the removable adhesive layer 4 and the inorganic non-metallic oxide layer 5 on the removable adhesive layer 4 are peeled off and removed together to expose the binding pins 330 in the binding area 33.

[0035] The removable adhesive layer 4 may be made of adhesive with an original adhesiveness of 0-50gf / 25mm, adhesive with an adhesiveness of 0-50gf / 25mm after weakening treatment, or adhesive with variable adhesiveness, such as photosensitive adhesive or heat-sensitive adhesive.

[0036] Specifically, in this embodiment, the peelable adhesive layer 43 can be made of ethanol, methanol, ethyl acetate, butyl acetate, polyvinyl butyral, n-butanol, and butanone as raw materials. The polyvinyl butyral is modified to form a liquid protective coating, which can be formed as a protective coating by spraying on the surface of an object. It has good excipient properties and can form a continuous, evenly attached, and tough transparent protective coating on the surface of a complex-shaped object. It does not require baking and can be quickly dried at room temperature without releasing harmful gases such as aldehydes, benzene, and ammonia. After drying and forming a film, it is easy to peel off the object in one piece without temperature requirements and without water or solvent cleaning. The peeled film can be recycled and reused. The coating is resistant to sunlight exposure and has the functions of being resistant to water, oil, alkali, salt solution, and dilute acid, and the coating has low temperature dependence.

[0037] In this embodiment, the thickness of the peelable adhesive layer 4 is 0.03-0.05 mm.

[0038] Preferably, the removable adhesive layer 4 is provided with a hand-held tear strip (not shown in the figure), and the hand-held tear strip extends outside the protective cover plate 1. In this way, when the binding area 33 is bound to the flexible circuit board, if the removable adhesive layer 4 needs to be removed, the hand-held tear strip can be used to conveniently remove the removable adhesive layer 4, and the removable adhesive layer 4 can be taken away together with the inorganic non-metallic oxide layer 5 covering it when being peeled off, which effectively improves production efficiency.

[0039] Preferably, the inorganic non-metallic oxide layer 5 includes a plurality of inorganic non-metallic oxide film layers, each of which has a thickness of 10-20 μm, and each inorganic non-metallic oxide film layer can be sequentially formed on the touch circuit layer 3 and the peelable adhesive layer 4 by a magnetron sputtering process. Specifically, the inorganic non-metallic oxide layer 5 includes at least one of a silicon oxide film layer, a silicon nitride film layer, and a silicon oxynitride film layer.

[0040] Since the thickness of the inorganic non-metallic oxide layer 5 is at the micron level, and the thickness of the strippable adhesive layer 4 is at the millimeter level, that is, the thickness of the strippable adhesive layer 4 is much greater than the thickness of the inorganic non-metallic oxide layer 5, each inorganic non-metallic oxide film layer will break at the edge of the strippable adhesive layer 4 due to the large step difference during sputtering, that is, the inorganic non-metallic oxide layer 5 located on the touch circuit layer 3 and the inorganic non-metallic oxide layer 5 located on the strippable adhesive layer 4 will be naturally disconnected to avoid the strippable adhesive layer 4 being taken away together with the inorganic non-metallic oxide layer 5 located above the touch circuit layer 3 when peeling.

[0041] The touch circuit layer 3 may be, but is not limited to, an OGS circuit layer, a GG circuit layer or a GF circuit layer. Since the specific structure type of the touch circuit layer 3 is a conventional technology in the art, it will not be described in detail herein.

[0042] The touch circuit layer 3 includes a touch sensing area 31 and a peripheral wiring area 32, the peripheral wiring area 32 surrounds the touch sensing area 31, and the binding area 33 is located on one side edge of the peripheral wiring area 32; the touch sensing area 31 includes at least one touch sensing electrode 310, and the peripheral wiring area 32 includes at least one metal wiring 320, and each touch sensing electrode 310 is electrically connected to a corresponding binding pin 330 through a corresponding metal wiring 320.

[0043] The inorganic non-metallic oxide layer 5 has a dense molecular structure, which covers the touch sensing area 31 and the peripheral wiring area 32 of the touch circuit layer 3, which can not only prevent the metal wiring 320 in the peripheral wiring area 32 from being corroded and oxidized by water vapor, but also prevent the touch sensing electrodes 310 in the touch sensing area 31 from being scratched by hard objects.

[0044] The protective cover plate 1 is provided with a light shielding ink 2 at a position corresponding to the peripheral wiring area 32 to shield the peripheral wiring area 32 of the touch circuit layer 3 and define the touch sensing area 31 of the touch circuit layer 3 .

[0045] Preferably, the light-shielding ink 2 is a black ink, and its OD value (absorbance) should be guaranteed to be above 4 to meet the light-shielding effect. The thickness of the light-shielding ink 2 is between 1.5-1.9 μm, and the number of layers is at least two. If the light-shielding property of the material of the light-shielding ink 2 is low, the thickness of the light-shielding ink 2 can be appropriately increased. If the light-shielding property of the material of the light-shielding ink 2 is high, the thickness of the light-shielding ink 2 can be appropriately reduced, and it should not be limited to this.

[0046] The black ink uses carbon black as a colorant, which is doped and mixed in an ink base material and formed on the surface of the protective cover plate 1 facing the touch circuit layer 3 through a silk screen printing process. It has the characteristics of high density, high viscosity, high covering power, etc. It has good printability, can be printed on various substrates, and has good weather resistance and durability.

[0047] In this embodiment, the protective cover plate 1 is a glass cover plate.

[0048] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the embodiments of the utility model rather than to limit them. Although the embodiments of the utility model are described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the embodiments of the utility model can still be modified or replaced by equivalents, and these modifications or equivalent replacements cannot cause the modified technical solutions to deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. A touch screen structure with high reliability, characterized in that: include: Protective cover; A touch circuit layer is disposed on the protective cover plate and includes a binding area, wherein the binding area includes at least one binding pin; A peelable adhesive layer is disposed on the binding area of ​​the touch circuit layer; The inorganic non-metallic oxide layer is arranged on the touch circuit layer and the peelable adhesive layer.

2. The touch screen structure according to claim 1, characterized in that: The thickness of the peelable adhesive layer is 0.03-0.05 mm.

3. The touch screen structure according to claim 1, characterized in that: The peelable adhesive layer is provided with a hand-held tear strip, and the hand-held tear strip extends outside the protective cover.

4. The touch screen structure according to claim 1, characterized in that: The inorganic non-metallic oxide layer includes a plurality of inorganic non-metallic oxide film layers, and the thickness of each inorganic non-metallic oxide film layer is between 10 and 20 μm.

5. The touch screen structure according to claim 1, characterized in that: The touch circuit layer is an OGS circuit layer, a GG circuit layer or a GF circuit layer.

6. The touch screen structure according to claim 1, characterized in that: The touch circuit layer includes a touch sensing area and a peripheral routing area, the peripheral routing area surrounds the touch sensing area, and the binding area is located on a side edge of the peripheral routing area; the touch sensing area includes at least one touch sensing electrode, the peripheral routing area includes at least one metal routing, and each touch sensing electrode is electrically connected to a corresponding binding pin through a corresponding metal routing.

7. The touch screen structure according to claim 6, characterized in that: The protective cover plate is provided with light-shielding ink at a position corresponding to the peripheral wiring area.

8. The touch screen structure according to claim 7, characterized in that: The light-shielding ink is black ink.

9. The touch screen structure according to claim 1, characterized in that: The protective cover plate is a glass cover plate.

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