Compound conducting film and touch screen using same

Abstract

The invention discloses a compound conducting film which comprises a first flexible transmitting base layer L1 with an upper surface and a lower surface, a second flexible transmitting base layer L2 with an upper surface and a lower surface, an elastic adhesive layer positioned between the first flexible transmitting base layer L1 and the second flexible transmitting base layer L2, inorganic dielectric film systems of at least two layers of dielectric films formed by sequentially staggering high-index inorganic dielectric films and low-index inorganic dielectric films and settled in sequence on the lower surface of the second flexible transmitting base layer L2 , and a transparent conducting film layer positioned at the outermost layer of the film system, wherein the thickness of the transparent conducting film layer meets the value being 3-10mm required by a square resistance, at least two dielectric film systems consisting of the high-index inorganic dielectric and both the low-index inorganic dielectric are settled by adopting a vacuum magnetron sputtering method so that optical interference film systems with whole transmittance rate reaching more than 80 percent is formed. The invention also provides a touch screen using the compound conducting film.

Description

Technical field: [0001] The invention relates to a composite conductive film with high transmittance and high durability, and various touch screens using the film. Background technique: [0002] Conventional conductive films for touch screens are usually formed by sputtering or coating a conductive layer directly on a flexible substrate. The transmittance of the conductive film in this way is not high, so the picture placed under the touch screen is usually dark. After multiple touches by the user, the conductive layer is easily broken and causes a change in the resistance value, resulting in a shift in the position calculated by the electric shock or unresponsive operation. [0003] For example, the application number is 02803118.0, and the patent application titled transparent conductive laminated body and transparent touch panel using the laminated body discloses a conductive laminated film with high light transmittance. On at least one surface of the organic polymer fil...

AI Technical Summary

Problems solved by technology

It is known that the larger the size of the conductive crystal grains, the more uniform the grain size distribution, and the better and more stable the overall conductivity of the film. Therefore, the conductivity and uniformity of the coating layer are not as good as those of the magnetron sputtering layer. If you want To achieve the same surface resistance value, the thickness of the coated conductive film is greater than the thickness of the sputtered conductive film. The higher thickness undoubtedly increases the light absorption of the material and reduces the overall transmittance, and reduces the film strength.

Images