Transparent conductive optical sheet with excellent pattern invisibility

Abstract

The invention relates to a transparent conductive optical sheet having high invisibility of a pattern. The transparent conductive optical sheet comprises an ITO layer via etching of a pattern. Via a thin film drying effects of a reflectivity matching layer of the optical sheet, difference between the reflectivity and reflecting color between a non-etching part and an etching part of the ITO layer is corrected, and a user is allowed to fail to recognize the non-etching part and the etching part visually, so definition for display of a display panel on a lower part will not be reduced. In particular, when thickness of the ITO layer is changed for adjustment of surface resistance, even if the reflectivity and thickness of a transparent base layer or the reflectivity matching layer are changed, the thin film drying effects can be well maintained. Thus, the optical sheet can be suitable for touch display panel field of display panels of all kinds of electrical devices.

Description

technical field [0001] The invention relates to a transparent conductive optical sheet containing indium tin oxide (ITO). More specifically, it relates to a transparent conductive optical sheet including an ITO layer formed by etching a pattern or the like for a touch screen panel or the like. Background technique [0002] In recent years, touch screen panels (touch screen panels, TSPs) are widely used in display parts such as mobile phones, tablet devices, and monitors. The core material of this TSP mainly uses an optical sheet including ITO, a transparent conductive material. [0003] When an optical sheet including ITO is used for a touch screen panel or the like, a part of the ITO layer is generally etched to form a sensing pattern. However, ITO has inherent dispersion characteristics in which the refractive index increases when moving from the visible light band (380 to 780 nm) to the short wavelength direction. In particular, light reflected on the ITO layer is refle...

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Problems solved by technology

[0005] However, the existing transparent conductive optical sheets still have room for improvement in terms of optical, electrical, and mechanical properties.

[0006] In particular, the surface resistance required by this transparent conductive optical sheet will be different according to different electronic products to be installed. In order to achieve this surface resistance, when changing the deposition thickness of the ITO layer, the film between the refractive index matching layer The effect of the dryness phenomenon will be reduced, and it is easy to become defective due to the recognition of the pattern, etc., and it is troublesome to completely redesign the refractive index and thickness of the refractive index matching layer every time the thickness of the ITO layer is changed.

[0007] In addition, due to the bending of the transparent base layer in the crystallization of ITO, pattern processing, cutting, and transfer processes, etc., the ITO layer is often damaged and the surface resistance is poor.

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