A method for 3D manufacturing an OGS capacitive touch screen

Abstract

The invention relates to a method for 3D manufacturing an OGS capacitive touch screen, the method comprising steps of: providing a glass panel, producing a plurality of patterned transparent conductive layers and a plurality of transparent conductive electrodes on a surface of a visible region of the glass panel; producing a patterhned light-shielding film around the glass panel; producing a first connection electrode at a connecting passage; producing a second electrode at a surface of the light-shielding film close to the first connection electrode; electrically connecting an FPC with a touch IC chip to a pin of the second connection electrode by thermal pressure to form a final integrated OGS touch screen. By the method of the invention, a capacitive touch screen is manufactured by a 3D printing. The method of the invention has a simple process, omits several complex processes of the traditional process such as exposure, developing and etching, and saves materials; and also the method of the invention improves effectively the performance and the reliability of the OGS touch screen and thus improves the product yield and the production efficiency.

Description

technical field [0001] The present invention relates to the technical field of touch screens, in particular to a method for manufacturing an integrated OGS touch screen in 3D. Background technique [0002] As an intelligent human-computer interaction interface product, touch screen has been more and more widely used in many fields of social production and life, especially in the field of consumer electronics (such as smart phones, tablet computers, etc.) fastest. There are many types of touch screen technologies, mainly including resistive, capacitive, infrared, and surface acoustic wave. Capacitive touch screen is not only responsive, supports multi-touch, but also has a long life. With the maturity of control IC technology, it has become the mainstream technology in the market. The new generation of OGS technology is a new development direction of capacitive touch screen. From a technical point of view, OGS technology is simpler in structure than the current mainstream G...

AI Technical Summary

Problems solved by technology

There will be many problems in the production process of this structure. First, the thickness of the light-shielding layer is about 1-2 microns, and the thickness of the ITO film is between 15-30 nanometers. The fracture here directly affects the pattern of the ITO conductive layer; secondly, the ink is not resistant to high temperature, and it is difficult to obtain a low-resistance ITO conductive layer at low temperature; in addition, the adhesion of the ITO conductive layer to the ink is very poor, which directly affects the FPC. Connection and Product Reliability

[0004] figure 2 As an improved OGS touch screen panel structure, an organic leveling layer (OC layer) 27 is covered on the surface of the light-shielding layer 22, and then an ITO transparent pattern electrode layer 23 is made on the surface of the OC layer. Causes the problem of ITO film fracture; however, due to the heat resistance of ink and OC materials, there are still problems with the resistance value and adhesion of the ITO conductive layer; on the other hand, due to the addition of a layer of OC, the thickness and light transmission of the product The degree will be greatly affected, and the process will become complicated

[0005] Chinese patents CN201310036353.2, CN201310042903.1, and CN201310042888.0 disclose a method for manufacturing an integrated OGS capacitive touch screen. The method is to make a transparent conductive electrode on a glass substrate, connect a transparent conductive film, and then make an external connection by screen printing. The electrode is connected to the transparent electrode. This method can not only effectively solve the problem of the fracture of the ITO conductive film, but also has no effect on the conductivity and adhesion of the ITO film; however, this method uses screen printing to print the conductive material connecting the electrode. ITO electrode surface, high printing accuracy and alignment accuracy, lower product yield, affecting the production cost of OGS touch screen

[0006] To sum up, in view of the complexity, yield, waste of raw materials and other problems of the existing integrated OGS touch screen manufacturing process, combined with the advantages of 3D manufacturing, it is very meaningful to propose a simple and raw material-saving process

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