Carbon nano-tube capacitive touch screen and manufacturing method thereof

Abstract

The invention relates to a carbon nano-tube capacitive touch screen and a manufacturing method of the carbon nano-tube capacitive touch screen. The carbon nano-tube capacitive touch screen structurally comprises a cover plate layer, an OCA optical adhesive layer and a transparent carbon nano-tube conductive film layer, a circuit layer is further arranged on the lower surface of the transparent carbon nano-tube conductive film layer, and an electrode layer is arranged on the periphery of the circuit layer and used for leading out the circuit layer. In the work process, a low-voltage alternating-current electric field is formed in the transparent carbon nano-tube conductive film layer, when a user touches the surface of the carbon nano-tube capacitive touch screen with one finger, a coupling capacitor will be formed between the finger and the transparent carbon nano-tube conductive film layer, a certain amount of charges will be transferred to the human body, in order to compensate charge loss, the charges are supplemented from the four corners of the carbon nano-tube capacitive touch screen, the amount of the charges supplemented in all the directions are in proportion to the distance of a touch point, and therefore the position of the touch point can be calculated.

Description

technical field [0001] The invention relates to a capacitive touch screen and a manufacturing method thereof, in particular to a structure and a processing method formulated for the composition of carbon nanotubes. Background technique [0002] As we all know, carbon nanotubes are seamless hollow tubular structures formed by curling carbon nanotube sheets. With excellent electrical properties, high strength and flexibility, stable chemical properties, and no obvious characteristic absorption of visible light and near-infrared light, the film composed of it is an ultra-flexible "transparent" conductor. In addition, the film also has the advantages of low cost, environmental friendliness and abundant resources. The current research results have proved that carbon nanotube films have transparent conductivity comparable to ITO, and are also considered to be the most promising materials to replace resource-scarce and brittle ITO and become one of the materials for a new generati...

AI Technical Summary

Problems solved by technology

[0015] The disadvantage of the transparent conductive film materials commonly used at present is that the outer layer of the film is easy to be scratched and scratched, resulting in malfunction of the touch screen; the ITO conductive layer is easily changed by changes in external conditions, and carbon nanotubes are used as a super flexible The "transparent" conductor can overcome the shortcomings of traditional materials

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