Capacitive touch screen and preparation method thereof

A capacitive touch screen and touch area technology, which is applied in the input/output process of electrical digital data processing, instruments, and data processing, etc. Yield and production capacity and other issues, to achieve the effect of electrode pattern and trace optimization, high light transmittance, and reliable structure

Inactive Publication Date: 2014-11-12
福建省辉锐材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, when OGS is used for multi-touch, it needs to use bridge or jumper technology, which invisibly increases the difficulty of the process and requires high precision. M

Method used

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  • Capacitive touch screen and preparation method thereof
  • Capacitive touch screen and preparation method thereof
  • Capacitive touch screen and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A method for preparing a capacitive touch screen with a compound touch electrode structure according to the present invention comprises the following steps:

[0040] 1. A non-window ink area 11 is formed around the single substrate, and the middle area surrounded by the non-window ink area 11 is the window touch area 12, and the thickness of the ink is 0.005 mm to 0.1 mm;

[0041] The monolithic substrate of the present invention can be made of glass with a thickness of 0.4 mm to 1.2 mm, preferably 0.7 mm ± 0.1 mm and 1.1 mm ± 0.1 mm. In a specific embodiment, the single substrate is a single panel glass with a thickness of 0.7 mm, which is chemically hardened to make a hardened panel glass with a surface hardness greater than 6H. After cleaning, the surface is screen-printed with ink to form a non-window ink area with surrounding ink and a central transparent window touch area, using high-temperature ink, screen printing twice, with a thickness of 0.02mm; the ink is an...

Embodiment 2

[0055] The difference from Embodiment 1 is that the method further includes a silver paste or metal plating on the first lead-out layer 211 area of ​​the non-window ink area 11 to form electrodes of the first lead-out layer 211 . The fabrication of the electrodes of the first lead-out line layer 211 can be completed before the formation of the first transparent conductive film, or can be completed after the formation of the first transparent conductive film. In a specific embodiment, the non-window ink area 11 uses mask sputtering metal; preferably, the sputtering metal is a combination of copper and molybdenum, the thickness of the copper film is 0.015um, and the thickness of the molybdenum film is 0.005um. It is also possible to sputter a metal molybdenum-aluminum-molybdenum composite film layer on the non-window ink area 11 after masking the window touch area 12 with a film thickness of 0.03 um.

Embodiment 3

[0057] The difference from Embodiment 1 is that the method further includes a process of silk-screen printing silver paste or metal plating on the area of ​​the second lead-out line layer 231 in the non-window ink area 11 to form the electrodes of the second lead-out line layer 231 . The fabrication of the electrodes of the second lead-out line layer 231 can be completed before the formation of the second transparent conductive film, or can be completed after the formation of the second transparent conductive film. In a specific embodiment, the second lead-out line layer 231 is formed on the surface of the non-window ink area 11 covered with SiO2 using a silk screen printing silver paste routing process;

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Abstract

The invention is applicable to the field of the touch screens and provides a capacitive touch screen. The capacitive touch screen comprises a panel layer, a composite touch electrode layer and a protective layer, all of which are orderly stacked on each other; the panel layer is provided with a window touch region; the composite touch electrode layer comprises at least two layers of transparent conductive films in the range of the window touch region and a layer of transparent insulating film formed between every two layers of transparent conductive films; the composite touch electrode layer is electrically connected with a flexible circuit board by use of leading-out wire layers. The capacitive touch screen is characterized in that for the electrode structure, the composite touch electrode is adopted, in other words, complete and mutually independent sensing electrode and drive electrode film structure layers, and respective leading-out wire layers are fabricated on one singe panel, and the electrode patterns and wiring are thoroughly optimized; meanwhile, the capacitive touch screen has the characteristics of light and thin product, material saving and high light transmittance; the traditional stack structure and preparation method of the touch electrode of the capacitive screen are broken through, and a flexible, efficient, quick and reliable fabrication process is adopted.

Description

technical field [0001] The invention relates to the field of touch screens, in particular to a capacitive touch screen and a preparation method thereof. Background technique [0002] The touch screen is an input device that can facilitate the interaction between people and computers and other portable mobile devices. In recent years, capacitive touch screens based on indium tin oxide (ITO) transparent conductive films, especially projected capacitive screens, which can perform multi-finger recognition and realize multi-touch, have been widely used in mobile Internet devices, such as smart phones and portable tablet computers. . [0003] As the requirements for screen reflectivity, light transmittance, and thickness are getting higher and higher, the traditional capacitive touch screen made of double-sheet glass (high hardness glass cover and glass with sensing electrodes) has become Difficult to meet requirements. A monolithic capacitive touch screen called OGS (One Glass...

Claims

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Application Information

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IPC IPC(8): G06F3/044
Inventor 杨与胜程序
Owner 福建省辉锐材料科技有限公司
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