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A kind of electronic silver paste and its preparation process

A preparation process and technology of silver paste, applied in cable/conductor manufacturing, circuits, electrical components, etc., can solve the problems of unfavorable electrical and mechanical properties of silicon substrates of crystalline silicon solar cells, and achieve increased light conversion efficiency and peeling mechanical strength. Raise, increase the effect of touch points and tunneling

Active Publication Date: 2011-12-21
郴州雄风环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Detrimental to the electrical and mechanical properties of silicon substrates for mass-produced crystalline silicon solar cells

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] An electronic silver paste and its preparation process. The electronic silver paste is prepared by combining silver powder, glass powder synthesized through technological processing, an organic carrier and additives. A dispersant is added during the combination preparation process; the weight percentage of the above components is as follows :

[0031] Silver powder 65%, glass powder 9%, organic vehicle 24%, additive 1%, dispersant 1%;

[0032] The particles of the silver powder are below 2 μm, and the shape is not limited;

[0033] Described glass powder is boron-bismuth-silicon-aluminum-tin-niobium-titanosilicate system, by B 2 o 3 、 Bi 2 o 3 , SiO 2 、Al 2 o 3 , SnO 2 , Nb 2 o 5 、TiO 2 The raw materials are processed and synthesized, and the weight percentages of each component are as follows:

[0034] B 2 o 3 2%, Bi 2 o 3 30%, SiO 2 19%, Al 2 o 3 2%, SnO 2 25%, Nb 2 o 5 14%, TiO 2 8%;

[0035] The organic carrier is a viscous liquid formed...

Embodiment 2

[0048] An electronic silver paste and its preparation process. The electronic silver paste is prepared by combining silver powder, glass powder synthesized through technological processing, an organic carrier and additives. A dispersant is added during the combination preparation process; the weight percentage of the above components is as follows :

[0049] Silver powder 63%, glass powder 6%, organic vehicle 28%, additive 2%, dispersant 1%;

[0050] The particles of the silver powder are below 2 μm, and the shape is not limited;

[0051] Described glass powder is boron-bismuth-silicon-aluminum-tin-niobium-titanosilicate system, by B 2 o 3 、 Bi 2 o 3 , SiO 2 、Al 2 o 3 , SnO 2 , Nb 2 o 5 、TiO 2 The raw materials are processed and synthesized, and the weight percentages of each component are as follows:

[0052] B 2 o 3 14%, Bi 2 o 3 25%, SiO 2 20%, Al 2 o 3 7%, SnO 2 20%, Nb 2 o 5 7%, TiO 2 7%;

[0053] The organic carrier is a viscous liquid form...

Embodiment 3

[0066] An electronic silver paste and its preparation process. The electronic silver paste is prepared by combining silver powder, glass powder synthesized through technological processing, an organic carrier and additives. A dispersant is added during the combination preparation process; the weight percentage of the above components is as follows :

[0067] Silver powder 80%, glass powder 5%, organic vehicle 12%, additive 1%, dispersant 2%;

[0068] The particles of the silver powder are below 2 μm, and the shape is not limited;

[0069] Described glass powder is boron-bismuth-silicon-aluminum-tin-niobium-titanosilicate system, by B 2 o 3 、 Bi 2 o 3 , SiO 2 、Al 2 o 3 , SnO 2 , Nb 2 o 5 、TiO 2The raw materials are processed and synthesized, and the weight percentages of each component are as follows:

[0070] B 2 o 3 22%, Bi 2 o 3 26%, SiO 2 10%, Al 2 o 3 12%, SnO 2 18%, Nb 2 o 5 10%, TiO 2 2%;

[0071] The organic vehicle is a viscous liquid for...

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Abstract

The invention relates to electronic silver paste and a preparation process thereof, belonging to the technical field of production of such base materials as electronic ceramic components, thick film hybrid circuits, touch components and the like. The electronic silver paste is prepared by mixing and stirring 4-9% of glass powder, 63-80% of silver powder, 12-28% of organic carrier and 0.2-2% of additive, rolling, dispersing and grinding the mixture, then adding 1-2wt% of bismuth stearate, stirring the mixture uniformly and filtering the mixture with a screen. The electronic silver paste and the preparation process have the following beneficial effects: the glass powder system does not contain lead; the minimum grain size and shape of the silver powder are not strictly required; and the silver paste is especially suitable for the positive electrodes of the solar cells on the crystalline silicon solar cell silicon substrates produced in large batch and has excellent electrical property and mechanical property..

Description

technical field [0001] The invention relates to an electronic silver paste and a preparation process thereof, which are mainly used in the technical field of solar photovoltaic power generation technology. By adjusting the proportion of the present invention, the present invention can also be used in the production of basic material technical fields such as electronic ceramic components, thick film hybrid circuits and touch elements. Background technique [0002] Electronic silver paste is the basic material for the manufacture and development of electronic components, thick film hybrid circuits and touch components. Its most widely used and promising product is electronic silver paste applied to solar photovoltaic power generation technology; The most meaningful technology in the world has become a hot spot for research and application in countries all over the world. In the past 10 years, it has been increasing at an average annual rate of 30%, and in the last 3 years, it...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01B1/22H01B13/00H01L31/0224
Inventor 谭雄玉曹孝义贺剑龙向纪元
Owner 郴州雄风环保科技有限公司
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