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Preparation method of conductive circuit for touch screen

A conductive circuit and touch screen technology, applied in the field of conductive circuit preparation of touch screen, can solve the problems of limited selection of touch screen substrate, long time consumption, high heat energy consumption, etc.

Active Publication Date: 2020-05-12
东莞市越丰光电有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Most of the current touch screen patterned conductive circuits are made by silver ink screen printing and baking, and the oven baking temperature needs to be above 150°C for 60-100 minutes. There are some shortcomings in this preparation method, for example: 1. Continuously high Baking at high temperature leads to limited selection of touch screen substrates; 2. The heat energy consumption required for baking is large and takes a long time, resulting in high cost and low efficiency; Parts other than conductive lines are prone to oil pollution

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0020] A method for preparing a conductive circuit for a touch screen, comprising the following steps

[0021] Step 1, prepare conductive ink; the formula of described conductive ink is calculated by mass percentage: 20% organic solvent, 55% silver powder, 25% glass binder; Mix organic solvent, silver powder, glass binder three to obtain conductive ink ; Preferably, the glass binder is powder; the organic solvent is obtained by mixing terpineol, butyl carbitol acetate, and cellulose at room temperature.

[0022] It should be noted that for the change of the formula of the conductive ink, in the preparation step of the conductive ink, it is preferable to mix the powder with the powder first, and then mix the powder with the solvent. The way. In step 1, first mix and stir the powdered glass binder and silver powder to obtain a powder mixture; then mix and stir the powder mixture and an organic solvent to bond the organic solvent, silver powder, and glass The conductive ink is ...

Embodiment 1

[0028] Embodiment one: step 1, prepare conductive ink; The formula of described conductive ink is calculated by mass percent: mixed by 20% organic solvent, 55% silver powder, 25% glass adhesive; Specifically: 1. Mix and stir the powdery glass binder and silver powder to obtain a powdery mixture; 2. Put 20% of the powdery mixture into the mixing tank first, and then continue to add 30% of the organic solvent to the mixing tank. % amount, during the process of adding the organic solvent, keep stirring, and then continue to stir for 10 minutes; 3. Then, add 80% of the powder mixture and 60% of the organic solvent to the stirring tank at the same time During the process of adding powdery mixture and organic solvent, keep stirring all the time, and then continue to stir for 15 minutes; 4. Finally, add 10% of the organic solvent into the mixing tank, and add the organic solvent , the stirring action was maintained all the time, and the stirring was then continued for 16 minutes.

...

Embodiment 2

[0032] Embodiment two: step 1, prepare conductive ink; The formula of described conductive ink is calculated by mass percent: mixed by 20% organic solvent, 55% silver powder, 25% glass adhesive; Specifically: 1. Mix and stir the powdery glass binder and silver powder to obtain a powdery mixture; 2. Put 20% of the powdery mixture into the mixing tank first, and then continue to add 30% of the organic solvent to the mixing tank. % amount, during the process of adding the organic solvent, keep stirring, and then continue to stir for 26 minutes; 3. Next, add 80% of the powder mixture and 60% of the organic solvent to the stirring tank at the same time In the process of adding the powder mixture and organic solvent, keep stirring, and then continue to stir for 30 minutes; 4. Finally, add 10% of the organic solvent to the stirring tank, and add the organic solvent , the stirring action was maintained, and the stirring was then continued for 20 minutes.

[0033] Step 2, screen print...

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PUM

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Abstract

The invention discloses a preparation method of a conductive circuit for a touch screen. The preparation method comprises the following steps: 1, preparing conductive ink; the formula of the conductive ink comprises, by mass, 20% of an organic solvent, 55% of silver powder and 25% of a glass binder. Mixing an organic solvent, silver powder and a glass binder to obtain conductive ink; 2, silk-screen printing conductive ink on a substrate to form a conductive circuit; 3, putting the substrate silk-screened with the conductive circuit obtained in the step 2 into an oven for baking, firstly continuously baking for a first time period at a first temperature, and then gradually reducing the temperature in the oven to a second temperature at a second time period; wherein the first temperature ranges from 96 DEG C to 105 DEG C, and the first time period ranges from 35 min to 40 min; wherein the second temperature is 48-52 DEG C, and the second time period is 5-15 minutes; and 4, taking out from the oven and naturally cooling to normal temperature; therefore, the method has the advantages of low temperature, high efficiency, stable quality and low cost.

Description

technical field [0001] The invention relates to the technology in the field of ink conductive circuits, in particular to a method for preparing conductive circuits for touch screens. Background technique [0002] Most of the current touch screen patterned conductive circuits are made by silver ink screen printing and baking, and the oven baking temperature needs to be above 150°C for 60-100 minutes. There are some shortcomings in this preparation method, for example: 1. Continuously high Baking at high temperature leads to limited selection of touch screen substrates; 2. The heat energy consumption required for baking is large and takes a long time, resulting in high cost and low efficiency; Parts other than conductive lines are prone to oil pollution. [0003] Therefore, in the present invention, the applicant has carefully studied a new method for preparing conductive lines for touch screens to solve the above problems. Contents of the invention [0004] In view of thi...

Claims

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Application Information

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IPC IPC(8): G06F3/041C09D11/52C09D11/03
CPCG06F3/041C09D11/52C09D11/03G06F2203/04103
Inventor 王亚平
Owner 东莞市越丰光电有限公司