Manufacturing method of capacitive touch screen

Abstract

The invention relates to a manufacturing method of a capacitive touch screen, which comprises the following steps: a circuit layer with a touch sensitive function is formed on a mother board; a polymer ductile layer is coated on the circuit layer and the circuit layer and the ductile layer are solidified, and the adhesive force of the ductile layer and the circuit layer is greater than the binding force of the circuit layer and the mother board; the ductile layer is enabled to be separated from the mother board, and the circuit layer is adhered to the ductile layer; a first adhesive layer is arranged on a protection plate or the ductile layer; the ductile layer is adhered to the protection plate, and the circuit layer, the protection plate and the ductile layer form the capacitive touch screen. The circuit layer is transferred from the motor board through the ductile layer, and is finally adhered to the protection plate, and the ductile layer has a circuit layer connection effect and a circuit layer transfer effect. The breakage of the circuit layer is prevented, so that the line breakage fault during the separation process of the circuit layer and the mother board is avoided, the yield of the touch screen finished products is improved, the manufacturing cost is lowered, and the protection plate can adopt a plane or a curved surface, so that the capacitive touch screen can be made into a curved surface.

Description

Technical field [0001] The invention relates to the field of touch screen manufacturing, and in particular to a method for manufacturing a capacitive touch screen. Background technique [0002] The structure of the projected capacitive touch screen generally includes a circuit layer with capacitive touch sensing function and a protective sheet. The circuit layer generally includes a conductive film layer with a thickness of less than 1 μm such as a transparent conductive film and a metal film, which is arranged inside the protective sheet. When the finger touches the outside of the protective sheet, the circuit layer can detect the touch action of the finger through the capacitive sensing principle. [0003] At present, some people have proposed a single-chip capacitive touch screen structure. The circuit layer of the single-chip capacitive touch screen is directly fabricated on the inner surface of the protective sheet (such as strengthened glass lens). Therefore, the overall thic...

AI Technical Summary

Problems solved by technology

However, in the current single-chip capacitive touch screen, the circuit layer needs to be processed on a flat panel by means of coating, photolithography, etc. Therefore, this kind of capacitive touch screen can only be designed as a plane, and cannot be made into a curved surface. As the designs of electronic products using touch screens, such as mobile phones and tablet computers, become more and more diverse, it is increasingly difficult for this flat capacitive touch screen to meet the needs of these electronic products.

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