A method of manufacturing a flexible capacitive touch screen

Abstract

A method for manufacturing a flexible capacitive touch screen comprises the steps of providing an adhesive layer on the inner side surface of a polyimide film or the outer side surface of a carrier plate, adhering the polyimide film to the carrier plate and applying a wind curtain during adhesion, manufacturing a touch circuit layer of the capacitive touch screen on the polyimide film, and stripping the polyimide film from the carrier plate. The polyimide film formed by polymerization is pasted on the carrier plate and then the touch circuit layer is manufactured, so that the thickness of thecapacitive touch screen can be made larger, and the subsequent processing is convenient; by controlling the adhesive force of the adhesive layer, the polyimide film is easy to peel off without breaking the molecular chain at the adhesive interface by laser, thus reducing the manufacturing cost; and when the polyimide film is adhered, a downward wind curtain is applied to the outer side of the polyimide film, under the gentle and uniform pressure action of the wind curtain, the polyimide film can be evenly spread and adhered on the carrier plate without wrinkling, thus providing a basis and guarantee for the subsequent fabrication of a good touch circuit layer.

Description

technical field [0001] The invention relates to a method for manufacturing a touch screen, in particular to a method for manufacturing a flexible capacitive touch screen. Background technique [0002] Flexible capacitive touch screen refers to a capacitive touch screen in which the touch sensing circuit is made on a flexible substrate, especially a flexible plastic substrate, which can be attached to a curved support surface to form a curved touch terminal, or combined with a flexible The display screen cooperates to form a flexible and curved touch display. [0003] In recent years, someone has used the process of making display devices (such as OLEDs) on polyimide films to make flexible capacitive touch screens. The method roughly includes the following steps: [0004] Step 1, coating the polyamic acid solution on the outer surface of the carrier plate, and polymerizing it into a polyimide film; [0005] Step 2, making the touch sensing circuit of the capacitive touch sc...

AI Technical Summary

Problems solved by technology

However, this laser method needs to use very expensive ultraviolet laser equipment, and the substrate also needs to use very expensive quartz glass (with high ultraviolet transmittance). Using the above method to manufacture flexible touch screens requires a very high investment threshold, which is not conducive to Popularization of flexible capacitive touch screen

[0008] In addition, since the above method can only form a flexible capacitive touch screen with a thickness of less than 10 μm, its too thin substrate thickness makes it difficult to operate the touch screen during subsequent processing (such as handling and fixing are more difficult)

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