Optical adhesive fast drying method during capacitive touch screen laminating process

Abstract

The invention belongs to the field of electronic and information technology, and provides an optical adhesive fast drying method during a capacitive touch screen laminating process. First, optical adhesive is coated on a substrate glass plated with a transparent conductive film; vacuum heating drying is directly carried out upon the substrate glass coated with the optical adhesive; a glass protection cover plate is covered on the substrate glass, and the substrate glass and the glass protection cover plate are subjected to pneumatic thermo-compression bonding. According to the method, a vacuum drying technology is adopted, such that an ideal optical adhesive humidity can be rapidly artificially obtained. The adhesive strength of the optical adhesive is greatly improved, such that rebounding of the capacitive screen module after lamination and hot-press can be effectively inhibited, and lamination yield is greatly improved. Compared with an optical adhesive natural drying process, with the vacuum drying process, optical adhesive humidity can be more easily controlled, production period is shortened, and comprehensive economic benefit is improved. The method has high practicality, and good popularization and application values.

Description

technical field [0001] The invention belongs to the technical field of electronic information, and in particular relates to a method for quickly drying optical glue in the bonding process of capacitive touch screens. Background technique [0002] The key link in the production process of the capacitive touch screen is the lamination of the TP module, that is, the solid optical adhesive (hereinafter referred to as OCA) is used to bond the ITO glass (TP) and the tempered glass cover together, and then put it into the high-pressure degassing machine Medium defoaming, after taking it out from the high-pressure defoaming machine, the capacitive screen module is obtained. However, after the capacitive screen module taken out of the high-pressure degassing machine is placed for a period of time, bubbles will appear in some modules, which we call "first pressure rebound". After comparative analysis, it was found that the "first pressure rebound" was mainly caused by poor drying of ...

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for quickly drying optical glue in the lamination process of capacitive touch screens, aiming to solve the problem of rapid drying of solid optical glue provided by the prior art, the drying effect is not ideal, and the stickiness of solid optical glue after drying The joint force is not strong, and the rebound rate of the first pressure is high

Images