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Conductive silver paste special for circuit of laptop keyboard and preparation method thereof

A notebook computer, conductive silver paste technology, applied in the direction of cable/conductor manufacturing, circuit, conductive material dispersed in non-conductive inorganic materials, etc., can solve the problem of poor bending resistance, easy wear and tear of silver paste, and long service life short, etc., to achieve the effect of improved coverage or bonding performance, improved electrical conductivity, and improved screen printability

Inactive Publication Date: 2010-02-10
SHANGHAI CHANGYIN ELECTRONICS MATERIALS TECHCO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the silver paste for notebook computer keyboard lines has disadvantages such as poor bending resistance, easy wear, and short service life.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] A preparation method of special conductive silver paste for notebook computer keyboard circuit, the method comprises the following process steps:

[0040] (1) Prepare materials according to the following components and content (weight):

[0041] Metallic Silver Powder 55%

[0042] Polymer resin 20%

[0043] Additives 2.5%

[0044] Solvent 22.5%

[0045] Described metallic silver powder is the mixed silver powder (weight ratio is 8: 1) that flaky silver powder and spherical silver powder are formed, and the particle diameter of described flaky silver powder is 5 μm, bulk density 0.8g / ml, and described spherical The particle diameter of silver powder is less than 1 μ m, and described polymer resin is polyurethane resin, and described additive comprises leveling agent glyceryl oleate, thickener polyvinyl alcohol, defoamer n-butyl alcohol, and the weight ratio of the three is 1:0.4:1, the solvent is cyclohexanone;

[0046] (2) Preparation of carrier:

[0047] Mix the ...

Embodiment 2

[0053] A preparation method of special conductive silver paste for notebook computer keyboard circuit, the method comprises the following process steps:

[0054] (1) Prepare materials according to the following components and content (weight):

[0055] Metallic silver powder 60%

[0056] Polymer resin 16%

[0057] Additive 1.5%

[0058] Solvent 22.5%

[0059] Described metallic silver powder is the mixed silver powder (weight ratio is 4: 1) that flaky silver powder and spherical silver powder are formed, and the particle diameter of described flaky silver powder is 7 μm, bulk density 1.0g / ml, and described spherical The particle size of the silver powder is less than 1 μm, the polymer resin is toluene diisocyanate-ethylene glycol polymer or diisocyanate diphenylmethane-glycerol polymer, and the additives include leveling agent castor oil, thickener Fumed silicon dioxide, defoamer ethylene glycol, the weight ratio of the three is 2: 1.5: 2, and described solvent is methyl b...

Embodiment 3

[0067] A preparation method of special conductive silver paste for notebook computer keyboard circuit, the method comprises the following process steps:

[0068] (1) Prepare materials according to the following components and content (weight):

[0069] Metallic silver powder 65%

[0070] Polymer resin 10%

[0071] Additive 5%

[0072] Solvent 20%

[0073] Described metal silver powder is the mixed silver powder (weight ratio is 5: 1) that flaky silver powder and spherical silver powder are formed, and the particle diameter of described flaky silver powder is 9 μm, bulk density 1.2g / ml, and described spherical The particle diameter of silver powder is less than 1 μ m, and described polymer resin is polyester resin, and described additive comprises leveling agent butyl acetate, thickener hydrogenated castor oil, defoamer ethyl silicone oil, and the weight ratio of the three is 4:1:3, the solvent is ethyl benzoate;

[0074] (2) Preparation of carrier:

[0075] Mix the polym...

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PUM

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Abstract

The invention relates to a conductive silver paste special for a circuit of a laptop keyboard and a preparation method thereof. The silver paste is prepared from the raw materials of the following components in percentage by weight: 55 to 65 percent of metal silver powder, 10 to 20 percent of macromolecule resin, 1.5 to 5 percent of additive and 10 to 25 percent of solvent. Compared with the priorart, a conductive silver circuit obtained by drying the silver paste has excellent anti-bending performance, the coverage property or associative property of insulation oil or carbon paste on a silver layer is greatly improved, and the performances such as screen printing property, surface rigidity, corrodibility resistance, environmental service life and the like are also improved; and the conductive silver paste enables the silver circuit obtained by screen printing, drying and solidify to be fully suitable for the process requirement of the production of the laptop keyboards.

Description

technical field [0001] The invention relates to conductive silver paste, in particular to a special conductive silver paste for notebook computer keyboard lines and a preparation method thereof. Background technique [0002] Compared with the desktop computer keyboard circuit, the keyboard setting of the notebook computer is determined by a more complicated production process. Therefore, in terms of the performance of the silver paste product, the special silver paste for the notebook computer keyboard circuit is required to meet higher standards, including : [0003] 1. Bending resistance of the silver circuit: Since the design of the various components of the notebook computer has a great limitation on the occupied space, the PET film used as the keyboard circuit and the silver circuit covered by screen printing must be assembled when the computer is assembled. Space is saved by bending or folding, so silver lines are required to have strong bending resistance. [0004] ...

Claims

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Application Information

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IPC IPC(8): H01B1/22H01B13/00
Inventor 杨晓荣孙健李茗陆冬蔚
Owner SHANGHAI CHANGYIN ELECTRONICS MATERIALS TECHCO
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