Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Touch screen electrode preparation method

An electrode manufacturing and electrode technology, which is applied in the field of touch film screen electrode manufacturing, can solve problems such as affecting electrical properties, large changes in the contact resistance between electrodes and resistive layers, and exceeding the linearity of a four-wire resistive touch screen.

Inactive Publication Date: 2008-09-10
张树峰
View PDF0 Cites 11 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Existing touch film screen electrodes are generally carried out by screen printing. The conductive ink is printed on the transparent conductive sheet or plate through the screen with electrode patterns, and then the conductive ink is firmly attached to the conductive layer after drying. , because the conductive ink is made of conductive powder and engineering adhesive, the main component of the engineering adhesive is a solvent-free liquid reactive adhesive. During the drying process, the organic body undergoes a polymerization reaction, and the conductive powder Firmly fixed and adhered to the conductive layer, because the adhesive is a non-conductor, although the manufacturer of the conductive ink claims that the volume resistivity of the conductive ink can reach 10 -4 Ωmm 2 / cm, but the actual resistivity is about 10 -3 Ωmm 2 / cm order of magnitude, so on a resistive screen touch film screen above 5 inches, the voltage drop of the printed electrode has seriously affected the electrical performance, and the transfer point process (ACF process) has to be used to reduce the internal electrode through the parallel connection of two layers of electrodes. Voltage drop; Factors affecting the electrical performance of resistive and capacitive touch screens include the uniformity and stability of the contact resistance between the printed electrode and the resistive layer, drying conditions and ink resistance after printing, in addition to the electrode body resistance. The wetness of the layers is different, resulting in a great change in the contact resistance of the electrode and the resistance layer, especially when the far-infrared tunnel furnace is used for drying, the change is more obvious
In order to change this situation, most manufacturers use ovens for drying, but the situation is slightly better than that of far-infrared tunnel ovens, and the inhomogeneity and instability of contact resistance still exist. Four-wire resistive touch screens cause excessive linearity and have a greater impact on electrical performance for five-wire resistive touch screens and current-injected capacitive touch screens that rely on precision resistor networks

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Touch screen electrode preparation method
  • Touch screen electrode preparation method
  • Touch screen electrode preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Pure copper is plated on the resistive layer of transparent conductive film or plate by physical vapor phase; the pure copper plated layer is covered with liquid photosensitive resist or dry film resist, and a resist layer with electrode patterns is formed after exposure and development , or directly print electrode patterns with liquid resist by screen printing; etch pure copper film with alkaline copper chloride etching solution, and finally use a short-wavelength laser less than 1065nm to etch the non-functional area and the isolation line between the electrode and the functional area , after removing the electrode pattern resist film, repeat the same procedure for making the electrode pattern resist film to make a non-functional area pattern resist layer on the resistance layer, and remove the resistance layer in the non-function area with an acidic etching solution.

[0032] Alkaline copper chloride etching solution The etching solution can adopt the formula introdu...

Embodiment 2

[0036] On the resistive layer of transparent conductive film or plate, brass is plated by physical vapor phase; the brass plated layer is covered with liquid photosensitive resist or dry film resist, and a resist layer with electrode patterns is formed after exposure and development. , It is also possible to directly print electrode patterns with liquid resist by screen printing; etch the brass film with alkaline copper chloride etching solution, and finally use a short-wavelength laser less than 1065nm to etch out the isolation lines between the non-functional area and the electrode and functional area , after removing the electrode pattern resist film, repeat the same procedure for making the electrode pattern resist film to make a non-functional area pattern resist layer on the resistance layer, and remove the resistance layer in the non-function area with an acidic etching solution.

Embodiment 3

[0038] On the resistive layer of the transparent conductive film or board, copper is plated in a physical vapor phase; the bronze plated layer is covered with a liquid photosensitive resist or a dry film resist, and a resist layer with electrode patterns is formed after exposure and development. The electrode pattern can be directly printed with liquid resist by screen printing; the bronze film is etched with alkaline copper chloride etching solution, and finally the isolation line between the non-functional area and the electrode and functional area is etched with a short-wavelength laser less than 1065nm. After removing the electrode pattern resist film, repeat the same procedure for making the electrode pattern resist film to form a non-functional area pattern resist layer on the resistance layer, and remove the resistance layer in the non-function area with acid etching solution.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A manufacturing method of an touch screen electrode comprises the following steps: a layer of metal film is formed on a resistance layer of a transparent conductive strip or a plate by physical vapor phase deposition; an anti-corrosion layer with an electrode pattern is formed on the metal film; the electrode pattern is formed by using alkaline metal etching liquid for etching the metal film; and a non-function area of the resistance layer is isolated with the electrode and a function area by etching. An electrode metal layer of the touch screen electrode which is manufactured by the method is formed under the physical vapor phase state, the electrode metal layer and the transparent resistance layer form the even and close combination, the contact is very even, and the contact resistance is extremely small; in addition, the formed metal resistance rate of the electrode is at the magnitude order of 10 Omega / cm, an ACP manufacturing procedure can be used for producing the large-size touch screen, the reduced contact resistance and the improved uniformity can enhance the electrical properties of the touch screen, and the production yield is improved.

Description

field of invention [0001] The invention relates to a method for manufacturing a touch screen electrode, in particular to a method for manufacturing a resistive and capacitive touch screen electrode. Background technique [0002] Existing touch film screen electrodes are generally carried out by screen printing. The conductive ink is printed on the transparent conductive sheet or plate through the screen with electrode patterns, and then the conductive ink is firmly attached to the conductive layer after drying. , because the conductive ink is made of conductive powder and engineering adhesive, the main component of the engineering adhesive is a solvent-free liquid reactive adhesive. During the drying process, the organic body undergoes a polymerization reaction, and the conductive powder Firmly fixed and adhered to the conductive layer, because the adhesive is a non-conductor, although the manufacturer of the conductive ink claims that the volume resistivity of the conductiv...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): G06F3/044G06F3/045
Inventor 张树峰
Owner 张树峰
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com