Flat-touch screen and manufacturing method thereof

Abstract

The invention provides a flat-touch screen. The flat-touch screen comprises a flexible circuit board 5, a glass substrate 1, a lower-layer optical adhesive layer 2, a lower-layer conducting layer 3, a double faced adhesive tape 4, an upper-layer conducting layer 6, an upper-layer optical adhesive layer 7 and a cover plate 8, wherein the glass substrate 1, the lower-layer optical adhesive layer 2, the lower-layer conducting layer 3, the double faced adhesive tape 4, the upper-layer conducting layer 6, the upper-layer optical adhesive layer 7 and the cover plate 8 are sequentially arranged in a stacked mode. The flexible circuit board 5 is electrically connected with the lower-layer conducting layer 3 and the upper-layer conducting layer 6 respectively and is arranged between the lower-layer conducting layer 3 and the upper-layer conducting layer 6. An electronic coating 9 is arranged between the upper-layer optical adhesive layer 7 and the cover plate 8 and used for isolating the upper-layer optical adhesive layer 7 from the cover plate 8, so that when the flexible circuit board 5 is connected with the lower-layer conducting layer 3 and the upper-layer conducting layer 6, the upper-layer optical adhesive layer 7 is only subjected to the tensile force of the upper-layer conducting layer 6, the phenomenon that air bubbles are produced due to excessive tensile force deformation between the upper-layer conducting layer 6 and the upper-layer optical adhesive layer 7 is avoided, and the electrical performance of the flat-touch screen is prevented from being influenced due to frequent pressing conducted on the flexible circuit board 5.

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 ...

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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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