Capacitive touch screen and manufacturing method thereof

Abstract

The invention discloses a capacitive touch screen. The capacitive touch screen comprises a touch-control basic layer and an induction basic layer, wherein the side, provided with X lines of ITO film conductive electrodes, of the touch-control basic layer is attached to the back side, provided with Y lines of conductive electrodes, of the induction basic layer face to face through optical transparent adhesive. The capacitive touch screen is of a G1M structure, wherein G refers to a glass sensor and serves as a carrier of the touch-control basic layer, 1M is a PET film sensor with a metal mesh which is low in wire resistance and low in sheet resistance printed on the surface and serves as a carrier of the induction basic layer, and the 1M is attached to the G to prevent film explosion. The capacitive touch screen has the advantages that the manufacturing is simple and cost is low. The capacitive touch screen is the best choice among capacitive touch screens with large sizes and middle sizes and particularly with sizes larger than 7 inches for a user.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to a structure of a medium-sized and large-sized capacitive touch screen, and a process for producing the medium-sized and large-sized capacitive touch screen. Background technique [0002] In today's society, electronic products with capacitive touch screens as the human-machine interface are becoming more and more popular. Due to the visual enjoyment and convenient use, consumers are more and more fond of medium and large-sized touch screen products. From large-screen mobile phones, PADs to ultrabook computers, multi-touch capacitive touch screens are used more and more widely, and their sizes are also getting larger. [0003] Capacitive touch screen Capacity Touch Panel (CTP) works by using the current induction of the human body. It is a touch screen that senses touch signals through the combination of electrodes and human body characteristics. When the four sides of the ...

AI Technical Summary

Problems solved by technology

[0011] OGS refers to a glass solution, which is an integrated structure of a glass cover and an ITO conductive sensor; the structures of the above touch screens have their own characteristics, some have high hardness, wear resistance, and long life, while others have low cost and low manufacturing process. Simple; however, no matter which structure of the capacitive touch screen above expands to medium and large sizes, there will be problems such as excessive line resistance and low transmittance of the transparent conductive layer pattern (Pattern) that induces current, because the larger the size The larger the area of ​​the capacitive touch screen pattern (Pattern), the longer the conductive line and the greater the resistance of the line

[0012] If the conductivity of ITO is expressed by the product of carrier density and mobility, about 7x10 -5 Ω.cm is the limit, so the square resistance of the ITO conductive film and the line resistance of the Pattern are difficult to achieve very low Yes, in this way, the weak current generated between the medium and large size capacitive touch screen and the human finger will be difficult to transmit to the IC chip quickly and accurately, and it will be difficult to realize free touch operation

At the same time, the transmittance of the ITO conductive film that blindly seeks low resistance will also be greatly reduced, and it will no longer be suitable for the use requirements of touch screens.

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