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Transparent conducting material for resistive touch panel

A technology of transparent conductive materials and transparent conductive films, applied in the direction of conductive layers on insulating carriers, metal material coating technology, electrical digital data processing, etc., can solve problems such as low yield rate, achieve quality improvement, consistent surface impedance, good uniformity

Inactive Publication Date: 2009-12-09
SHENZHEN O FILM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because these acid-resistant protective inks belong to oily substances and are non-wetting with acid liquid, the gaps between the matrix units mentioned above are very narrow. Therefore, the gaps between acid-resistant inks are also very small. Under the effect of surface tension, the acid liquid does not It is easy to be in contact with the exposed ITO film, and there is often a problem that it cannot be etched into complete insulation, resulting in a very low yield

Method used

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  • Transparent conducting material for resistive touch panel
  • Transparent conducting material for resistive touch panel
  • Transparent conducting material for resistive touch panel

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Experimental program
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Embodiment Construction

[0023] figure 1 It is the transmittance curve of an ITO film commonly used in resistive touch screens. It can be seen from the figure that the ITO film has high transmission characteristics, but its transmittance decreases with the decrease of the wavelength, and it shows absorption phenomenon in the low-wave band, especially the band below the blue light. This absorption phenomenon comes from the nature of the ITO film. Sign absorption. This absorption phenomenon is the cause of the slight yellowing of the ITO film, which affects the appearance of the ITO used.

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Abstract

The invention discloses a transparent conducting material for a resistive touch panel, which comprises a polyethylene terephthalate (PET) substrate and three layers of optical thin films on the surface of the substrate, wherein from the surface of the substrate, the three layers of optical thin films are a high refractive index dielectric optical thin film, a low refractive index dielectric optical thin film and a transparent conducting film sequentially. Through the design of the three layers of optical thin films, the transparent conducting material has an anti-reflection effect on light within a visual wave range of less than 490 nanometers, particularly a range from 400 to 490 nanometers. The sheet resistivity of the transparent conducting material is between 200 and 600 ohms per square. The physical properties of the transparent conducting material facilitate the preparation and quality improvement of the resistive touch panel.

Description

technical field [0001] The invention relates to a transparent conductive material based on flexible polyethylene terephthalate (PET), which is applied to a resistive touch screen. Background technique [0002] The touch screen is an input device that significantly improves the man-machine interface, and has the advantages of intuition, simplicity and speed. With the development of electronic technology, the use of touch screens is becoming more and more common. Various types of touch screens have emerged in the past, including resistive, capacitive, infrared, and surface acoustic wave touch screens. Among them, the resistive touch screen is the mainstream in the market. The core of a resistive touch screen is two layers of transparent conductive material. The combination of these two layers of transparent conductive materials has two structures: TCO Film & TCO Film and TCOFilm & TCO Glass (TCO is the abbreviation of transparent conductive oxides). TCO Film and TCO Glass ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B5/14G06F3/045B32B27/36B32B7/02B32B9/04C23C14/35
Inventor 唐根初蔡荣军
Owner SHENZHEN O FILM TECH
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