Capacitive touch screen and manufacture method thereof

Abstract

The invention relates to a capacitive touch screen, comprising an ITO (Indium Tin Oxide) glass substrate provided with a printed circuit layer on the front side, wherein a PET (polyethylene glycol terephthalate) film is adhered on the outer side surface of the printed circuit layer. The invention also provides a manufacture method of the capacitive touch screen, which comprises the following steps of: binding: forming the printed circuit layer on the ITO glass substrate, and then binding a flexible circuit board to the ITO glass substrate to be connected with the printed circuit layer; and film sticking: sticking an optical clear resin to the PET film, and cutting the PET film into a small piece matching to the ITO glass substrate in size, and sticking the small PET film to the outer side surface of the printed circuit layer on the ITO glass substrate. In the invention, the traditional glass cover plate is replaced by the PET film, the device and the process operation for the sticking step are simplified; and the invention has low cost and high efficiency and is suitable for the mass production. The sticking of the PET film belongs to the film-glass sticking manner, and the product yield is up to 99%. The image distortion of the product is not easy to occur during using. During assembling, the casing presses against the soft PET film having a good buffer action, and the entire capacitive screen cannot be crushed.

Description

technical field [0001] The invention relates to the field of touch screens, in particular to a capacitive touch screen and a preparation method thereof. Background technique [0002] At present, the existing capacitive touch screen (referred to as "capacitive screen") mainly adopts the structural form of an upper glass cover plate and a lower ITO glass plate. Since the upper and lower layers are made of glass, when they are bonded together, air bubbles are easily generated between the two layers of glass, resulting in a low product yield, and the cost of using a glass cover for the upper layer is very high. thicker. [0003] In addition, the upper glass cover plate needs to be cut with CNC equipment, which is very inefficient. At the same time, the current capacitive screen structure is only suitable for assembly from the upper layer down, and the casing cannot be pressed onto the capacitive screen for assembly, otherwise the capacitive screen will be crushed. Contents o...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a capacitive touch screen to solve the problem that the production process of ordinary capacitive touch screens is difficult to control, reduce costs and improve yield

[0005] The further technical problem to be solved by the present invention is to provide a method for preparing a capacitive touch screen to solve the problem that the production process of a common capacitive touch screen is difficult to control, reduce costs and improve yield

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