Double-layer touch screen and preparation method for same

Abstract

The invention discloses a double-layer touch screen, which comprises transparent cover plate glass, a first transparent impressing adhesive layer, a first conductive layer, a second transparent impressing adhesive layer, a second conductive layer and an anti-reflection layer, wherein the first conductive layer is embedded in the first transparent impressing adhesive layer, and comprises a plurality of first bus-bars, and the first bus-bars extend along a first direction, and are formed by intersecting conductive silk threads; and the second conductive layer is embedded in the first transparent impressing adhesive layer, and comprises a plurality of second bus-bars, and the second bus-bars extend along a second direction, and are formed by intersecting conductive silk threads. Compared with the conventional touch screen, the double-layer touch screen has the advantages that indium tin oxide (ITO) is replaced by the first and second conductive layers formed by a conductive material filled in a first groove and a second groove, an additional etching technology is not required by such a process, the light transmittance and the electrical conductivity are ensured, and meanwhile, the material cost is lower, so that the cost can be lowered. The invention also discloses a preparation method for the double-layer touch screen.

Description

technical field [0001] The invention relates to the field of optoelectronics, in particular to a double-layer touch screen and a preparation method thereof. Background technique [0002] A touch screen is an inductive device that can receive input signals such as touch. The touch screen has endowed information interaction with a new look and is a very attractive new information interaction device. The development of touch screen technology has aroused widespread concern in the information media circles at home and abroad, and has become a rising high-tech industry in the optoelectronic industry. [0003] According to whether each area of ​​the touch screen is transparent, the area coated with the ink layer on the touch screen can be called a non-visible area, and other areas not coated with ink can be called a visible area. The working sensing area of ​​the touch screen is usually set in the visible area. [0004] Currently, the ITO (Indium Tin Oxide) layer is a vital com...

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Problems solved by technology

[0005] Indium is an expensive metal material, so using ITO as the material of the conductive layer greatly increases the cost of the upper touch screen. Moreover, in the patterning process of the ITO conductive layer, the entire surface of the ITO film that has been plated needs to be processed. Etching to form ITO patterns. In this process, a large amount of ITO is etched away, resulting in a large amount of precious metal waste and pollution, and the cost is high

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