An integrated touch-controlled transparent film capacitive switch and a manufacturing method thereof

Abstract

The present invention provides an integrated touch-controlled transparent film capacitive switch and a manufacturing method thereof, and relates to the technical field of touch-controlled switches. The integrated touch-controlled transparent film capacitive switch is formed by injecting a film with a decorative pattern film and a TCS circuit into an injection molding machine. The present invention has the beneficial effects of simplifying the process flow of the product, reducing manual assembly and material usage, and increasing the consistency and reliability of the product, so that the product is beautiful, sealed and waterproof, anti-debonding, and high temperature resistant, thereby improving the quality and user satisfaction.

Description

Technical Field

[0001] The present invention relates to touch control switch technology in the fields of electronic consumer products, household appliances, automobiles and industrial applications, and in particular to an integrated touch-controlled transparent film capacitive switch and a manufacturing method thereof. Background Art

[0002] The existing touch-sensitive transparent film capacitive switch is made by bonding, aligning, stacking and assembling the decorative film inner parts and the transparent capacitive sensing film at multiple levels, which involves multiple procedures of manual alignment and film bubble removal. Since it is a discrete component and manually assembled, the consistency, sealing, high temperature resistance and heat insulation performance of the product are not ideal, the quality is unstable, and the user satisfaction is affected. Summary of the invention

[0003] The purpose of the present invention is to provide an integrated touch transparent film capacitive switch and a manufacturing method thereof, which not only simplifies the process flow of the product, reduces manual assembly and material usage, but also increases the consistency and reliability of the product, making the product beautiful, sealed and waterproof, anti-debonding, and high temperature resistant, thereby improving quality and user satisfaction.

[0004] In order to achieve the above object, the technical solution provided by the present invention is:

[0005] An integrated touch-sensitive transparent film capacitive switch comprises a PET base film, a film inner decorative silk-screen layer, a cured insulating layer, a silver paste silk-screen layer connecting a switch node circuit, a PEDOT silk-screen layer, a conductive layer, and a circuit marking and orthogonal line silk-screen layer, wherein the film inner decorative silk-screen layer is disposed on the PET base film, and a UV-cured insulating layer, a sandwich layer, a UV-cured insulating layer, and a conductive layer are disposed on the film inner decorative silk-screen layer in sequence, wherein the sandwich layer is composed of a silver paste silk-screen layer connecting a switch node circuit and a PEDOT silk-screen layer, and the conductive layer is disposed on the circuit marking and orthogonal line silk-screen layer.

[0006] A method for manufacturing an integrated touch transparent film capacitive switch comprises the following steps: silk-screening the decorative pattern required for the film inner component on a PET base film of the film inner component, and then manufacturing the circuit of the transparent touch switch on the prepared film inner component film; finally, placing the prepared film with the decorative pattern and the transparent touch switch circuit into an injection molding machine for injection molding to form an integrated film inner component, which is integrated into a touch transparent film capacitive switch.

[0007] Furthermore, the process for silk-screening the decorative pattern required for the film inner part on the PET base film for making the film inner part comprises the following steps:

[0008] 1) Cutting: Cut the rolled PET base film into square blocks of designed size for printing and molding processes;

[0009] 2) Flat printing: Make a film screen according to the required icons and texts, and print the icons and texts on the cut square blocks of base film;

[0010] 3) Ink drying and fixing: Place the printed film square in a high-temperature oven to dry and fix the ink. Further, the circuit process of making a transparent touch switch on the film inner film includes the following steps:

[0011] 1) Cutting: Cut the rolled PET base film into square blocks of designed size for printing and molding processes;

[0012] 2) UV curing: Silver paste is used to screen-print the connection lines of the switch nodes, the screen printing is orthogonal, and the wires are protected with PET film;

[0013] 3) IR baking of the screen-printed integrated film.

[0014] Furthermore, the process of placing the film with the decorative pattern and the transparent touch switch circuit into an injection molding machine for injection molding to form an integrated film internal integrated product comprises the following steps:

[0015] 1) Punching positioning holes: Punching positioning holes for thermoforming;

[0016] 2) Thermoforming: After the printed film is heated, it is formed using a high pressure machine or copper mold in a preheated state;

[0017] 3) Cutting the outer shape: cutting off the waste of the formed three-dimensional film;

[0018] 4) Material injection molding: Place the film that has the same three-dimensional shape as the front mold on the front mold after molding and inject the finished product.

[0019] The beneficial effects of the present invention are as follows: an integrated product is formed in a mold by an injection molding process. On the one hand, compared with the lamination technology, the film injection molding process provided by the present invention has simplified steps and simple operation. On the other hand, since the decorative layer and the transparent capacitive switch (TCS) circuit layer are fixed in the engineering plastic by the injection molding process, the manufactured transparent capacitive switch has the advantages of good integrity, good sealing, high temperature resistance, good heat insulation effect, and beautiful appearance and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure decomposition of the integrated transparent capacitive touch switch of the present invention;

[0021] In the figure: 1-PET base film, 2-film internal decorative silk screen layer, 3-UV curing insulation layer, 4-silver paste silk screen layer connecting the switch node line, 5-PEDOT silk screen layer, 6-conductive layer, 7-line marking and orthogonal line silk screen layer. DETAILED DESCRIPTION

[0022] In order to better illustrate the present invention, further description is now given in conjunction with embodiments and drawings.

[0023] like Figure 1 As shown, the integrated touch-sensitive transparent film capacitive switch specifically comprises: the film inner component decorative silk screen layer (2) is disposed on the PET base film (1), the film inner component decorative silk screen layer is disposed on the UV-cured insulating layer (3), the sandwich layer, the UV-cured insulating layer (3) and the conductive layer in sequence, wherein the sandwich layer is composed of a silver paste silk screen layer (4) and a PEDOT silk screen layer (5) connected to the switch node circuit, and the conductive layer (6) is disposed on the circuit marking and orthogonal line silk screen layer (7).

[0024] The specific process steps for implementing the integrated touch transparent film capacitive switch include:

[0025] 1) Cut the PET base film into the designed size and shape;

[0026] 2) Print the icons and texts required for decoration and identification on the cut base film;

[0027] 3) Place the printed film in a high-temperature oven to dry and fix the ink;

[0028] 4) Flat printing insulation layer, UV curing;

[0029] 5) Use a stencil to print the circuit diagram of the TCS layer with PEDOT and UV cure;

[0030] 6) Use a stencil to screen-print the connection lines of the switch nodes with silver paste and UV cure;

[0031] 7) Flat printing insulation layer, UV curing;

[0032] 8) Flat screen printed conductive graphite;

[0033] 9) Plane silk screen markings and orthogonal lines;

[0034] 10) Protected by PET film;

[0035] 11) IR baking screen printed integrated film;

[0036] 12) Punching positioning holes on the integrated membrane;

[0037] 13) The film with the positioning holes is thermoformed: after the film is heated, it is formed by a high pressure machine or a copper mold in a preheated state;

[0038] 14) Cutting the outer shape: cutting off the waste of the formed three-dimensional film;

[0039] 15) The film having the same three-dimensional shape as the front mold after molding is placed on the front mold to injection mold an integrated transparent capacitive touch switch product.

[0040] In the description of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does 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 limiting the present invention. In addition, if the terms "first", "second", "third" appear, they are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0042] The above embodiments are only used to illustrate the technical solution of this embodiment, rather than to limit it. It should be pointed out that, for a person skilled in the art, without departing from the concept of the present invention, the technical solution recorded in the above embodiments can still be modified, or part or all of the technical features thereof can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solution depart from the scope of the technical solution of the present invention.

Claims

1. An integrated touch-sensitive transparent film capacitive switch, characterized in that: It includes a PET base film, a decorative silk-screen layer for film inner parts, a cured insulating layer, a silver paste silk-screen layer connecting the switch node circuit, a PEDOT silk-screen layer, a conductive layer, and a circuit marking and orthogonal line silk-screen layer. The PET base film is provided with a decorative silk-screen layer for film inner parts, and the decorative silk-screen layer for film inner parts is provided with a UV-cured insulating layer, a sandwich layer, a UV-cured insulating layer, and a conductive layer in sequence. The sandwich layer is composed of a silver paste silk-screen layer connecting the switch node circuit and a PEDOT silk-screen layer, and the conductive layer is provided with a circuit marking and orthogonal line silk-screen layer.

2. A method for manufacturing an integrated touch-sensitive transparent film capacitive switch as claimed in claim 1, characterized in that: The decorative pattern required for the film inner part is screen-printed on the PET base film of the film inner part, and then the circuit of the transparent touch switch is made on the finished film inner part film. Finally, the film with the decorative pattern and the transparent touch switch circuit is placed in the injection molding machine for injection molding to form an integrated film inner part, which is integrated into a touch transparent film capacitive switch.

3. A method for manufacturing an integrated touch-sensitive transparent film capacitive switch as claimed in claim 2, characterized in that: The process for silk-screening the decorative pattern required for the film inner part on the PET base film for making the film inner part comprises the following steps: 1) Cutting: Cut the rolled PET base film into square blocks of designed size for printing and molding processes; 2) Flat printing: Make a film screen according to the required icons and texts, and print the icons and texts on the cut square blocks of base film; 3) Ink drying and fixing: Place the printed film square in a high-temperature oven to dry and fix the ink.

4. The method for manufacturing an integrated touch-sensitive transparent film capacitive switch according to claim 2, characterized in that: The circuit process of manufacturing the transparent touch switch on the membrane inner component film comprises the following steps: 1) Cutting: Cut the rolled PET base film into square blocks of designed size for printing and molding processes; 2) UV curing: Silver paste is used to screen-print the connection lines of the switch nodes, the screen printing is orthogonal, and the wires are protected with PET film; 3) IR baking of the screen-printed integrated film.

5. The method for manufacturing an integrated touch-sensitive transparent film capacitive switch according to claim 2, characterized in that: The process of placing the film with the decorative pattern and the transparent touch switch circuit into an injection molding machine for injection molding to form an integrated film internal integrated product comprises the following steps: 1) Punching positioning holes: Punching positioning holes for thermoforming; 2) Thermoforming: After the printed film is heated, it is formed using a high pressure machine or copper mold in a preheated state; 3) Cutting the outer shape: cutting off the waste of the formed three-dimensional film; 4) Material injection molding: Place the film that has the same three-dimensional shape as the front mold on the front mold after molding and inject the finished product.

Images