Touch sensor structure with twice wiring on front surface of base material

Abstract

The utility model relates to the technical field of capacitive screens, in particular to a touch sensor structure with twice wiring on the front face of a base material, which comprises a base material layer. The first curing adhesive layer is arranged on the first surface of the base material layer, and a plurality of first grooves are formed in the first curing adhesive layer; the first conductive metal layer is arranged in the first groove; the second curing adhesive layer is arranged on the first curing adhesive layer, and a plurality of second grooves are formed in the second curing adhesive layer; and the second conductive metal layer is arranged in the second groove. According to the utility model, the front surface of the base material is printed and wired twice, so that a layer of base material and a bonding layer between the two layers of base materials can be omitted, and the pressure of material cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of capacitive screens, and in particular to a touch sensor structure. Background Art

[0002] The sensor part is the core component of the capacitive touch screen. The sensor part generally includes a substrate and a conductive layer arranged on the substrate. The currently used touch sensor structure provides two substrate layers, and conductive metal layers are printed on each of the two substrates for routing. However, this structural production process has almost no room for reducing the material (BOM) cost, which cannot meet the company's goal of reducing production costs. Utility Model Content

[0003] The purpose of this utility model is to provide a touch sensor structure with two traces on the front side of the substrate to solve the above technical problems;

[0004] The technical problem solved by the present invention can be achieved by adopting the following technical solutions:

[0005] A touch sensor structure with two traces on the front side of a substrate, comprising:

[0006] substrate layer;

[0007] a first curing adhesive layer, disposed on the first surface of the substrate layer, wherein the first curing adhesive layer is provided with a plurality of first grooves;

[0008] a first conductive metal layer disposed in the first trench;

[0009] A second cured adhesive layer is provided on the first cured adhesive layer, wherein the second cured adhesive layer is provided with a plurality of second grooves;

[0010] The second conductive metal layer is disposed in the second trench.

[0011] Preferably, the second surface of the substrate layer is connected to an external display screen.

[0012] Preferably, an adhesive layer is provided on the second cured adhesive layer.

[0013] Preferably, the thickness of the adhesive layer is 50um-250um.

[0014] Preferably, the thickness of the first conductive metal layer is 2um-8um, the thickness of the second conductive metal layer is 2um-8um, the thickness of the first conductive metal layer is equal to the depth of the first groove, and the thickness of the second conductive metal layer is equal to the depth of the second groove.

[0015] Preferably, the first conductive metal layer and the second conductive metal layer have the same size.

[0016] Preferably, the substrate layer is a film-like structure.

[0017] Preferably, the thickness of the substrate layer is 125um-250um.

[0018] Preferably, the thickness of the first cured adhesive layer is 6um-40um, and the thickness of the second cured adhesive layer is 6um-40um.

[0019] Beneficial effects of the present invention: Due to the adoption of the above technical solution, the present invention can save a layer of substrate and an adhesive layer between two substrates by printing and routing twice on the front side of the substrate, thereby reducing the pressure of material costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the touch sensor structure in an embodiment of the present utility model. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0024] A touch sensor structure with two traces on the front side of the substrate, such as Figure 1 Shown, including,

[0025] Base material layer 1;

[0026] A first curing adhesive layer 2 is provided on the first surface of the substrate layer 1, and a plurality of first grooves are provided on the first curing adhesive layer 2;

[0027] A first conductive metal layer 3 is provided in the first trench;

[0028] A second curing adhesive layer 4 is provided on the first curing adhesive layer 2, and a plurality of second grooves are provided on the second curing adhesive layer 4;

[0029] The second conductive metal layer 5 is disposed in the second trench.

[0030] Specifically, the present invention is a new sensor structure proposed by improving the existing structure. The traditional structure provides two substrate layers 1, and the two substrate layers 1 are both made of PET film material, and a conductive metal layer is printed on each of the two substrates. The present invention only needs to provide a single substrate layer 1, and the first side of the single substrate layer 1 is printed twice. Compared with the traditional structure, one layer of substrate and the adhesive layer between the two substrates can be omitted, thereby reducing the pressure of material (BOM) cost.

[0031] In a preferred embodiment, the second surface of the substrate layer 1 is connected to an external display screen.

[0032] In a preferred embodiment, an adhesive layer 6 is provided on the second curing adhesive layer 4 .

[0033] In a preferred embodiment, the thickness of the adhesive layer 6 is 50 um-250 um.

[0034] Specifically, the preparation process of the utility model includes:

[0035] Step 1: Apply resin (UV glue) on the first surface of the substrate layer 1;

[0036] Step 2, forming a first cured adhesive layer 2 with a first groove by imprinting the groove through a mold;

[0037] Step 3: printing a conductive paste in the first groove to form a first conductive metal layer 3;

[0038] Step 4: Continue to apply resin (UV glue) on the first surface of the first curing adhesive layer 2;

[0039] Step 5: Imprinting the grooves through the mold to form a second cured adhesive layer 4 having second grooves;

[0040] Step 6: Printing a conductive paste in the second groove to form a second conductive metal layer 5;

[0041] Step 7: Paste the adhesive layer 6 on the second cured adhesive layer 4.

[0042] Specifically, the utility model continues to apply a layer of insulating resin on the basis of the original printed single-layer conductive layer, and while applying the resin, the surface is transferred into a pattern with grooves through a soft film mold, so that a new conductive film pattern is formed on the resin surface. The conductive paste is then scraped inside the pattern to obtain two conductive layers. Finally, an adhesive layer is attached to the surface of the outermost conductive film to complete the first side, that is, the structural design of two routings on the front side.

[0043] In a preferred embodiment, the thickness of the first conductive metal layer 3 is 2um-8um, the thickness of the second conductive metal layer 5 is 2um-8um, the thickness of the first conductive metal layer 3 is equal to the depth of the first groove, and the thickness of the second conductive metal layer 5 is equal to the depth of the second groove; specifically, in this embodiment, the thickness of the first conductive metal layer 3 is 7um, and the thickness of the second conductive metal layer 5 is 7um.

[0044] Specifically, the substrate layer 1 is connected to the display screen to receive capacitive pen touch feedback during the use of the capacitive screen, the first conductive metal layer 3 is the sensing part wiring of the sensor of the present invention, and the second conductive metal layer 5 is the driving part wiring of the sensor of the present invention.

[0045] In a preferred embodiment, the substrate layer 1 is a film-like structure.

[0046] In a preferred embodiment, the thickness of the substrate layer 1 is 125 um-250 um; specifically, in this embodiment, the thickness of the substrate layer 1 is 250 um.

[0047] In a preferred embodiment, the thickness of the first cured adhesive layer 2 is 6um-40um, and the thickness of the second cured adhesive layer 4 is 6um-40um; specifically, in this embodiment, the thickness of the first cured adhesive layer 2 is 10um, and the thickness of the second cured adhesive layer 4 is 10um.

[0048] The above description is only a preferred embodiment of the present invention and does not limit the implementation method and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A touch sensor structure with two traces on the front side of a substrate, characterized in that: include, substrate layer; a first curing adhesive layer, disposed on the first surface of the substrate layer, wherein the first curing adhesive layer is provided with a plurality of first grooves; a first conductive metal layer disposed in the first trench; A second cured adhesive layer is provided on the first cured adhesive layer, wherein the second cured adhesive layer is provided with a plurality of second grooves; a second conductive metal layer disposed in the second trench; The thickness of the first conductive metal layer is 2um, the thickness of the second conductive metal layer is 2um, the thickness of the first conductive metal layer is less than or equal to the depth of the first groove, and the thickness of the second conductive metal layer is less than or equal to the depth of the second groove.

2. The touch sensor structure with double wiring on the front side of the substrate according to claim 1, characterized in that: The second surface of the substrate layer is connected to an external display screen.

3. The touch sensor structure with double wiring on the front side of the substrate according to claim 1, characterized in that: An adhesive layer is provided on the second curing adhesive layer.

4. The touch sensor structure with double wiring on the front side of the substrate according to claim 3, characterized in that: The thickness of the adhesive layer is 50um-250um.

5. The touch sensor structure with double wiring on the front side of the substrate according to claim 1, characterized in that: The substrate layer is a film-like structure.

6. The touch sensor structure with double wiring on the front side of the substrate according to claim 1, characterized in that: The thickness of the substrate layer is 125um-250um.

7. The touch sensor structure with double wiring on the front side of the substrate according to claim 1, characterized in that: The thickness of the first cured adhesive layer is 6um-40um, and the thickness of the second cured adhesive layer is 6um-40um.

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