A kind of solid optical adhesive full bonding method

Abstract

The invention discloses a full lamination method of solid optical glue, which comprises the following steps: providing a base plate and a cover plate; laminating solid optical glue on the surface of the base plate or the cover plate; aligning and laminating the base plate and the cover plate to obtain a semi-finished product, In addition, edge pre-curing is performed on the laminated substrate and cover plate; pressure defoaming treatment and main curing are performed to obtain a finished product. The present invention pre-cures the edge before degassing, so that the edge of the solid optical adhesive becomes stable, and it is not easy to enter the gas during the degassing process, thereby reducing the air entering the edge of the solid optical adhesive, and solving the problem of the existing solid optical adhesive after degassing. After foaming, there is still the problem of high defect rate of edge bubbles, which overcomes the problem in the prior art that the pressure in the bubble furnace is increased to completely remove the bubbles, but the problem of large bubble rebound in the solid optical adhesive, especially at the edge, is overcome. Avoid the problem that the edge bubbles bounce back and reduce the pressure in the bubble furnace, but the bubbles in the middle of the solid optical glue cannot be baked.

Description

technical field [0001] The invention relates to the technical field of full lamination, and more specifically, relates to a full lamination method of solid optical glue. Background technique [0002] In existing life, full lamination technology has been widely used in life, industry and other fields. With the rapid development of science and technology, market competition has become increasingly fierce, and more requirements have been gradually put forward for full lamination technology. In terms of bonding materials, the adhesive materials currently used in the industry can be divided into three mainstreams, one is solid OCA optical adhesive, the second is liquid OCR optical adhesive, and the third is solid SCA optical film. [0003] At present, the commonly used adhesive material in the industry is OCR optical adhesive, but when the OCR optical adhesive is cured, it is difficult to cure completely at the frame and FPC, and needs to be cured again. Especially it is difficu...

AI Technical Summary

Problems solved by technology

[0003] At present, the commonly used adhesive material in the industry is OCR optical adhesive, but when the OCR optical adhesive is cured, it is difficult to cure completely at the frame and FPC, and it needs to be cured again.

Especially it is difficult to control the glue overflow of large size lamination, the production cost is high and the production efficiency is low

The product needs to be transported to different stations three or four times, and the labor cost of production is also high. Air bubbles are easy to be generated during the process of dispensing and leveling, and covering the substrate or cover, and movement on the conveyor belt may cause displacement , the larger the bonding area, the easier it is to produce

In order to solve the problem of glue overflow and displacement, the industry has also begun to use OCA optical glue to replace OCR optical glue. However, OCA optical glue has the disadvantage that it is easy to generate air bubbles during lamination. Currently, the pressure defoaming method is used for baking treatment. Solve this problem, but in the actual lamination, although the bubble treatment methods such as pressure defoaming are carried out, the OCA optical glue still has bubble rebound, mainly concentrated on the edge of the OCA optical glue, and the existing technology is difficult to completely solve this problem