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Preparation method of conductive ink for touch screen and forming process of conductive circuit

A technology of conductive ink and conductive circuit, applied in the direction of conductive pattern formation, ink, printed circuit, etc., can solve the problem of high cost, achieve cost saving, no chemical waste liquid pollution, and shorten production time

Inactive Publication Date: 2018-10-02
CHONGQING ZHONGGUANGDIAN DISPLAY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process is expensive and may not be suitable for all touch screen substrates, such as PET film, and also contains toxic solvents or additives

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of the conductive ink for touch screen of the present invention is as follows:

[0027] Add 14g of silver nitrate to 30mL of deionized water at room temperature and stir until completely dissolved, then slowly drop in ammonia water with a mass concentration of 10% while shaking until the solution is clear, then add 3mL of polyacrylic acid and 1g of β-cyclodextrin and stir for 0.8h, Prepare a silver nitrate solution; add diethanolamine to 30 mL of deionized water and stir until completely dissolved to obtain a diethanolamine solution with a mass concentration of 25%; add the diethanolamine solution to the silver nitrate solution at room temperature and stir for 25 minutes, then add 4 mL of ethylene glycol Alcohol was ultrasonically oscillated at a frequency of 40kHz and a power of 450W for 0.8h, and filtered through a nano-membrane with a pore size of 100-200nm for 1.3h to obtain a transparent low-viscosity liquid conductive ink.

Embodiment 2

[0029] The preparation method of the conductive ink for touch screen of the present invention is as follows:

[0030] Add 14g of silver nitrate to 30mL of deionized water at room temperature and stir until completely dissolved, then slowly drop in ammonia water with a mass concentration of 10% while shaking until the solution is clear, then add 3mL of polyacrylic acid and 1g of β-cyclodextrin and stir for 0.5h, Prepare a silver nitrate solution; add diethanolamine to 30mL deionized water and stir until completely dissolved to obtain a diethanolamine solution with a mass concentration of 25%; add the diethanolamine solution to the silver nitrate solution at room temperature and stir for 20min, then add 4mL ethylene glycol Alcohol is subjected to ultrasonic oscillation at a frequency of 45kHz and a power of 450W for 1.0h, and is filtered with a nano-membrane with a pore size of 100-200nm for 1h to obtain a transparent low-viscosity liquid conductive ink.

Embodiment 3

[0032] The preparation method of the conductive ink for touch screen of the present invention is as follows:

[0033] Add 14g of silver nitrate to 30mL of deionized water at room temperature and stir until completely dissolved, then slowly drop in ammonia water with a mass concentration of 10% while shaking until the solution is clear, then add 3mL of polyacrylic acid and 1g of β-cyclodextrin and stir for 1.0h, Prepare a silver nitrate solution; add diethanolamine to 30mL deionized water and stir until completely dissolved to obtain a diethanolamine solution with a mass concentration of 25%; add the diethanolamine solution to the silver nitrate solution at room temperature and stir for 30min, then add 4mL ethylene glycol Alcohol is subjected to ultrasonic oscillation at a frequency of 30kHz and a power of 450W for 0.5h, and is filtered through a nano-membrane with a pore size of 100-200nm for 1.5h to obtain a transparent low-viscosity liquid conductive ink.

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PUM

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Abstract

The invention relates to the technical field of touch screen, and in particular, relates to a preparation method of a conductive ink for a touch screen and a forming process of a conductive circuit. The preparation method comprises the steps: taking silver nitrate, adding silver nitrate into deionized water, stirring to make silver nitrate completely dissolved, followed by dropping ammonia water until the solution is clarified, then adding polyacrylic acid and beta-cyclodextrin, and stirring, to obtain a silver nitrate solution; adding a diethanolamine solution into the silver nitrate solutionat room temperature, stirring for 20-30 min, followed by adding ethylene glycol, carrying out ultrasonic oscillation for 0.5-1.0 h, and filtering for 1-1.5 h with a nano-membrane, to obtain the conductive ink; taking a substrate, washing with neutral water and carrying out non-contact AP cleaning successively, and then jetting the conductive ink onto a patterned conductive circuit through a piezoelectric nozzle to form a patterned liquid circuit thin film, placing at the temperature of 80-90 DEG C, baking for 4 min, and then forming a solid-state conductive circuit on the substrate. The prepared conductive ink is non-toxic, can be cured and formed at low temperature, and can be cured to form the patterned conductive circuit with low electrical resistivity and fine circuit by the jetting process; the process is simple and fast.

Description

technical field [0001] The invention relates to the technical field of touch screens, in particular to a method for preparing conductive ink used in touch screens and a process for forming conductive lines. Background technique [0002] Touch screen, also known as "touch screen" or "touch panel", is an inductive liquid crystal display device that can receive input signals such as contacts. Drive various connecting devices according to pre-programmed programs, which can be used to replace mechanical button panels, and produce vivid audio-visual effects through liquid crystal display screens. As the latest computer input device, the touch screen is currently the simplest, most convenient and natural way of human-computer interaction. It endows multimedia with a new look and is a very attractive new multimedia interactive device. Mainly used in public information inquiry, leadership office, industrial control, military command, electronic games, ordering songs and dishes, mul...

Claims

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Application Information

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IPC IPC(8): C09D11/52C09D11/107C09D11/14C09D11/03H05K3/12
CPCC09D11/03C09D11/107C09D11/14C09D11/52H05K3/125
Inventor 李宪荣
Owner CHONGQING ZHONGGUANGDIAN DISPLAY TECH CO LTD
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