How to make a capacitive touch screen

Abstract

The invention provides a manufacturing method for a capacitive touch screen, which comprises the following steps: S1, defining a plurality of mutually isolated and non-conducted electrode regions and a plurality of non-electrode regions in a conducting film coated with ITO (indium tin oxide) through a laser etching device according to a design drawing; S2, guiding serially connected tandem elargols in the non-electrode regions to connect to a ground pin of a FPC (flexible printed circuit), performing etching on the elargols through the laser etching device and separating the elargols into elargol leads in one-to-one correspondence with the non-electrode regions; and S3, sticking slotted OCA (optical clear adhedive) with the etched conducting film according to a designed drone, and cutting outline or performing die cutting on the outline of the stuck OCA and conducting film through the laser etching device to make a single-chip sensor function chip.

Description

technical field [0001] The present invention relates to the field of capacitive touch screens, and more particularly, to a method for manufacturing a capacitive touch screen. Background technique [0002] Marked by the birth of the Apple iPhone, the application of capacitive touch screens in smart phones has entered a climax of development and consumption in the world. At present, regardless of well-known brands in the industry or counterfeit guerrillas, there are almost no mobile phone manufacturers that do not compete to launch a variety of capacitive touch screen mobile phones. One hundred yuan cottage machines are also developing capacitive touch screens. Undoubtedly, with the advent of the 3G era, it is a good time for the development of capacitive touch screens. [0003] In the touch screen industry, capacitive touch screens have surpassed resistive touch screens and become the leading technology in the industry. It is expected that the shipment of projected capacit...

AI Technical Summary

Problems solved by technology

[0005] At present, the shipment of capacitive touch screens on the market is increasing day by day. At present, all sensors are made by acid-base etching or etching paste etching process. The corresponding environmental pollution is also increasing day by day. The commonly used 4-inch mobile phone touch screen is currently For example, the production of a touch screen requires about 1ml of chemical liquid. In 2011, the shipment volume was 868 million pieces. Including the production yield, about 1 billion pieces of mobile phone touch screens were produced, and a total of about 1 million liters of chemical liquid was used. liquid, causing serious environmental pollution

as attached figure 1 and 2 As shown, the acid-base etching process or etching paste etching process is used in the production process of the capacitive touch screen sensor, and the existing production process will pollute the environment

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