Flat touch screen and method of making the same

Abstract

The present invention provides a flat touch screen, comprising a flexible circuit board 5 and a glass substrate 1, a lower optical adhesive layer 2, a lower conductive layer 3, a double-sided adhesive 4, an upper conductive layer 6, an upper optical adhesive layer 7 and The cover plate 8; the flexible circuit board 4 is electrically connected to the lower conductive layer 3 and the upper conductive layer 6 respectively and is arranged between them; an electronic coating 9 is provided between the upper optical adhesive layer 7 and the cover plate 8, and the electronic coating Layer 9 is located right above the flexible circuit board 5 . In the present invention, by providing an electronic coating 9 between the upper optical adhesive layer 7 and the cover plate 8, the upper optical adhesive layer 7 and the cover plate 8 are isolated, so that when the flexible circuit board 3 is connected to the lower conductive layer 3 and the upper conductive layer 6 , the upper optical adhesive layer 7 is only subjected to the pulling force of the upper conductive layer 6, which avoids the generation of air bubbles between the upper conductive layer 6 and the upper optical adhesive layer 7 due to excessive tension deformation, and prevents the frequent pressing of the flexible circuit board 5 from affecting the pure Electrical performance of flat touch screens.

Description

technical field [0001] The invention relates to the technical field of touch screen manufacturing, in particular to a flat touch screen and a manufacturing method thereof. Background technique [0002] In the manufacturing process of the flat touch screen, it is necessary to use optical glue to bond the cover plate and the upper conductive layer, and connect the flexible circuit board to the conductive lines of the upper conductive layer. [0003] When pressing the cover directly above the flexible circuit board frequently, the following problems will occur: [0004] 1) Since the viscosity of the optical glue will pull the conductive line of the upper conductive layer, the connection between the flexible circuit board and the conductive line will be loosened, and the connection resistance at the connection will increase, resulting in poor electrical performance of the flat touch screen; [0005] 2) Since the flexible circuit board has a certain height, the optical adhesive ...

AI Technical Summary

Problems solved by technology

[0006] The existing technology solves the above problems. Generally, a laser is used to cut the optical glue on the position of the flexible circuit board, and then the optical glue above the position is manually removed and the residual glue is wiped off, so that there is no longer any glue on the position of the flexible circuit board. There is optical glue to pull the flexible circuit board and lower the "step", but the disadvantage of this method: a lot of labor is wasted, and the optical glue is difficult to clean very cleanly, and the upper conductive layer is easily scratched

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