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Electric conductive silver paste and manufacturing method thereof

A technology of conductive silver paste and silver paste, which is used in the manufacture of cables/conductors, conductive materials dispersed in non-conductive inorganic materials, circuits, etc. and other problems, to achieve the effects of improved photoelectric conversion efficiency, good thixotropy, and low contact resistance

Active Publication Date: 2013-08-21
SHENZHEN CHENGGONG CHEM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the invention is to provide a conductive silver paste, which aims to solve the problems of poor conductivity, poor bonding force, disconnection, wire film strength, and unguaranteed adhesion to the substrate in the prior art, and at the same time, the cost is reasonable , easy to promote

Method used

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  • Electric conductive silver paste and manufacturing method thereof
  • Electric conductive silver paste and manufacturing method thereof
  • Electric conductive silver paste and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0075] For the conductive paste used in ceramics and solar battery cathodes, the composition and weight percentage are as follows:

[0076] Micron silver powder: 55%

[0077] Nanometer silver alloy powder: 12%

[0078] Lead-free glass powder: 8%

[0079] Organic carrier: 25%

[0080] Among them, the organic carrier includes plasticizers, thickeners, solvents, additives, plasticizer dibutyl phthalate, the thickener is ethyl cellulose, the solvent is terpineol, and the additives are hydrogenated castor oil and The foaming agent Holland Tuna DNE12, in which the thickener ethyl cellulose in the organic vehicle is 8%, the plasticizer dibutyl phthalate accounts for 1.5%, the solvent terpineol accounts for 14%, and the additives are selected from hydrogenated castor oil , Antifoaming agent Dutch Tuna DNE12, the ratio of the two is 1:0.5: the two account for 1.5%, the micron-level silver powder refers to the particle diameter in the range of 2-10 nanometers, and the nano-level silver alloy is...

Embodiment 2

[0090] For the conductive paste used in ceramics and solar battery cathodes, the composition and weight percentage are as follows:

[0091] Micron silver powder: 38%

[0092] Nanometer silver alloy powder: 5%

[0093] Lead-free glass powder: 5%

[0094] Organic vehicle: 52%

[0095] Among them, the organic carrier includes thickeners, plasticizers, solvents, additives. The thickener is methyl cellulose, the plasticizer is dibutyl phthalate, the solvent is terpineol, and the additives are hydrogenated castor oil and Antifoaming agent Holland Tuna Chemical DNE12, in which the thickener methyl cellulose in the organic vehicle is 16%, the plasticizer dibutyl phthalate accounts for 3%, the solvent terpineol accounts for 30%, and the additives are selected from hydrogenated Castor oil, antifoaming agent Holland Tuna DNE12, the ratio of the two is 1:0.5: the two account for 3%, the micron-level silver powder refers to the particle diameter in the range of 2-10 microns, and the nano-level sil...

Embodiment 3

[0097] For the conductive paste used in ceramics and solar battery cathodes, the composition and weight percentage are as follows:

[0098] Micron silver powder: 40%

[0099] Nanometer silver alloy powder: 8%

[0100] Lead-free glass powder: 10%

[0101] Organic vehicle: 42%

[0102] Among them, organic vehicles include organic vehicles including thickeners, plasticizers, solvents, additives, thickeners (methyl cellulose), solvents (terpineol), additives (hydrogenated castor oil, defoamer Netherlands Tuna DNE12), where the thickener methyl cellulose in the organic vehicle is 16%, the plasticizer dibutyl phthalate accounts for 3%, the solvent terpineol accounts for 21%, and the additives are selected from hydrogenated castor oil, The foaming agent Dutch Tuna DNE12, the ratio of the two is 1:0.5: the two account for 2%. The micron-level silver powder refers to the particle diameter in the range of 2-10 nanometers. The nano-level silver alloy selects the alloy of silver and cerium, and t...

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Abstract

The invention discloses electric conductive silver paste and a manufacturing method of the electric conductive silver paste. The electric conductive silver paste comprises, by mass percentage, 35 - 65 % of micron-sized silver powder, 1-10 % of nanometer-sized silver powder of or 1-20 % of nanometer-sized silver and other metal alloy powder, and 1-10 % of an organic carrier; for ceramics, solar cell silver paste comprises 2-15 % of unleaded glass powder, each component is manufactured in parts, weighed, mixed and stirred or mixed and rapidly scattered, and ultrasonic-vibrated or fine adjusted of viscosity of solvent, and therefore the electric conductive silver paste is obtained. Due to the fact that the nanometer-sized silver powder or the nanometer-sized silver alloy powder is mixed with the micron-sized silver powder, intensity of conductivity and a circuit is improved, adhesive force of crushing resistance and a base plate is improved, at the same time unleaded slurry good in thixotropy, low in contacting resistance and low in piece-needed slurry amount replaces lead slurry materials, the electric conductive silver paste is used for manufacturing crystalline silicon solar cells, improves photoelectric conversion efficiency, accords with environmental-protection ideas, and can be produced in large scales continuously.

Description

Technical field [0001] The invention relates to a conductive silver paste and a preparation method thereof, and is particularly suitable for use in the field of silver paste for thin and thick film conductive lines, ceramics or solar battery anodes. Background technique [0002] Conductive silver paste has been widely used in 3C products and solar battery cathode materials. In the field of 3C, especially the touch screen, the development is getting faster and faster. At present, the silver paste circuit used in the touch screen is getting thinner and thinner, and higher and higher requirements are put forward for the conductivity and circuit reliability. It is also an undeniable fact that the photoelectric conversion efficiency of the silver paste used in the anode of solar cells is low, and further improvement of the photoelectric conversion efficiency is expected by the industry. [0003] Take the conductive silver paste used in the touch screen circuit of mobile phones as an ex...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B1/16H01B13/00
Inventor 王江锋陈建平汪文珍李云华杨明
Owner SHENZHEN CHENGGONG CHEM
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