Capacitive touch screen conductive film and large-sheet lamination process thereof

Abstract

The invention provides a conductive film for a capacitive touch screen, including a tempered glass layer, an upper-line OCA optical adhesive layer, an upper-line ITO film layer, an lower-line OCA optical adhesive layer, and an lower-line ITO film layer. The conductive film of the capacitive touch screen is from top to bottom The bottom is 0.7mm tempered glass layer, 0.1mm upper line OCA optical adhesive layer, 0.02‑0.1m upper line ITO film layer, 0.05mm lower line OCA optical adhesive layer and 0.02‑0.1m lower line ITO film layer, The layers are fixed together by bonding. The present invention provides a capacitive touch screen conductive film and its laminating process, which is a brand-new capacitive screen ultra-thin ITO film laminating process, which can greatly solve the production yield problem of current capacitive screen manufacturers, and has great significance for the development of the industry. Great promotion and great practical significance.

Description

technical field [0001] The invention relates to the technical field of a conductive film of a touch screen and its processing, in particular to a conductive film of a capacitive touch screen and a laminating process thereof. Background technique [0002] The touch screen is a device that converts the sensing signal into a digital signal to realize human-computer interaction; the capacitive touch screen is the capacitance change generated between the finger or the conductive medium and the electrode on the substrate when touching, through the digital signal of the drive chip. Convert and output the coordinate position of finger or conductive medium touch. At present, capacitive touch screens have been widely used in mobile phones, tablets and other fields. At present, the capacitive touch screen traditionally used is generally a structure in which two layers of glass are bonded by optical glue, that is, GG structure; or a structure in which one layer of glass and one or two ...

AI Technical Summary

Problems solved by technology

The current commonly used capacitive touch screen structure has the problems of large thickness and relatively large weight

Reducing the thickness of the upper-line ITO film and the lower-line ITO film has become an important means to reduce the thickness and weight of the capacitive touch screen. The traditional bonding process is: the back of the upper-line ITO film is pasted with the lower-line OCA → window opening → upper-line OCA window opening → upper and lower lines Lamination of ITO film → paste OCA on the front of the upper line ITO film → small piece punching. When performing the steps of pasting the back of the upper line ITO film with the lower line OCA and laminating the upper and lower line ITO films, the thickness of the upper line ITO film 3 and the lower line ITO film 5 will decrease. Thin, and the off-line OCA is also very thin, and it is not easy to vent, which will cause a large number of defective air bubbles, affect the yield rate, and cause high costs

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