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Condenser type contact screen and its manufacture method

The invention relates to a technology of a capacitive touch screen and a manufacturing method, which is applied in the fields of electric digital data processing, photoengraving process of pattern surface, optics, etc., and can solve the problems of thick LCD touch screen, complicated calculation method, error-prone, etc., and achieves low cost, high production Process optimization, easy installation effect

Inactive Publication Date: 2008-02-20
SHENZHEN H&T INTELLIGENT CONTROL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the calculation method of this capacitive sensing touch screen is very complicated, high cost, low efficiency, and error-prone
[0003] In addition, for the technology of LCD+touch screen, the existing technology is to add a layer of touch screen on top of the LCD. The LCD touch screen made with such a structure is often relatively thick, and other components are required to connect the LCD and the touch screen.

Method used

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  • Condenser type contact screen and its manufacture method
  • Condenser type contact screen and its manufacture method
  • Condenser type contact screen and its manufacture method

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Embodiment Construction

[0031] The capacitive touch screen of the present invention uses an exposure etching process to make required button shapes and lines on the ITO glass. The lead-out method of the touch screen can adopt methods such as FPC or pins or zebra strips. Use the exposure etching process to make the required button shape and circuit on the ITO glass.

[0032] The structure of the first embodiment of the present invention is described in conjunction with FIG. 1 and FIG. 2. The capacitive touch screen of the present invention includes an indium tin oxide layer, a transparent protective layer 8 arranged above the indium tin oxide layer, and the indium tin oxide layer The shape of the key 1 is etched on the top, and each key 1 is led out by one or more etched lines 2 , and the key 1 is connected to the control circuit through the lines 2 . Line 2 can be led out by means of FPC or pins or zebra strips. A liquid crystal display 9 is provided below the buttons 1 and lines 2 , and a liquid c...

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Abstract

The utility model relates to a capacitance touch screen, comprising a tin / indium oxides layer and a transparent protection layer on the tin / indium oxides layer. Key shapes are etched on the tin / indium oxides layer, and each press-key with one or more outgoing etched lines, is connected with a capacitance touch chip by the line. A manufacturing method of the capacitance touch screen comprises the following steps: A1) set the first tin / indium oxides layer; A2) etch the keys and lines on the first tin / indium oxides layer through photo-etching technology. Because keys and lines of the capacitance touch screen are directly etched on the tin / indium oxides layer in the utility model, signal transmission along the lines can be realized in the simplest way, and the key pressed can be estimated in the shortest time, hence lower cost and higher efficiency. The integration of the LCD and touch screen makes the display and the touch screens in the same plane without adding any thickness or holes to be drilled on the structure. The touch screen has advantages of convenient installation and attractive appearance.

Description

technical field [0001] The present invention relates to a touch screen and a manufacturing method, more specifically, to a capacitive touch screen and a manufacturing method. Background technique [0002] The capacitive sensing touch screen works by using the current induction of the human body. ITO is an N-type oxide semiconductor-indium tin oxide. The ITO film is the transparent conductive film of indium tin oxide semiconductor. It usually has two main performance indicators: resistivity and light transmittance. At present, the resistivity of the ITO film layer is generally 5×10 -4 around, best up to 5×10 -5 , which is close to the resistivity of the metal. The light transmittance of ITO can reach more than 90%. The resistance of ITO conductive glass is generally between 650 and 500 ohms. This is sufficient for capacitive touch applications. The outermost layer of the capacitive touch screen is a thin layer of silica glass protective layer, the interlayer ITO coating...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/133G06F3/044G03F7/00
CPCG02F1/134309G02F1/13338G06F3/044C09K2323/00G06F3/0445
Inventor 汪显方刘建伟
Owner SHENZHEN H&T INTELLIGENT CONTROL
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