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Low-junction-temperature solar diode welding agent

A technology of solar energy and diodes, applied in welding medium, welding equipment, welding/cutting medium/material, etc., can solve problems such as low oxidation resistance, poor activity, and increased flux concentration

Inactive Publication Date: 2018-05-29
CHANGZHOU GIANTION PHOTOELECTRICITY IND DEV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the process of diode production, flux is often used for welding chips and other parts. The flux is generally composed of metal solid solder and flux. The flux generally uses alcohol liquid with a low boiling point as an organic solvent. During the soldering process Due to the high volatility of organic solvents, the concentration of flux will increase, and diluents need to be added continuously, which increases the cost. The existing fluxes still have poor activity and low oxidation resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] Embodiment one: low-junction temperature solar diode soldering agent, by weight percentage, is made up of 65% metal powder and 35% flux, and described metal powder is by weight percentage by the lead of 92.5%, 44.% tin, 3 % silver and 0.1% indium, the flux contains 35% masson rosin, 7% malonic acid, 3% tartaric acid, 7% benzotriazole, 3% hydrogenated castor oil, Surplus is organic solvent, and organic solvent comprises tetrahydrofurfuryl alcohol and triethylene glycol butyl ether, and the mass percent of each composition in described organic solvent is,

[0012] Tetrahydrofurfuryl alcohol 35%-44%

[0013] Triethylene glycol butyl ether 56%-65%.

[0014] After adopting the above scheme, the metal powder configured in proportion can make the solder have better wettability and ductility, soften the texture and reduce stress damage, have excellent anti-oxidation ability, reduce the leakage current of the surface electric field, and can also reduce the use temperature , im...

Embodiment 2

[0015] Embodiment two: low junction temperature solar diode soldering agent, by weight percentage, is made up of 70% metal powder and 30% flux, and described metal powder is by weight percentage by the lead of 92.5%, 44.% tin, 3 % silver and 0.1% indium, and the flux contains 45% masson rosin, 3% malonic acid, 7% tartaric acid, 3% benzotriazole, and 7% hydrogenated castor oil by weight. Surplus is organic solvent, and organic solvent comprises tetrahydrofurfuryl alcohol and triethylene glycol butyl ether, and the mass percent of each composition in described organic solvent is,

[0016] Tetrahydrofurfuryl alcohol 45%-50%

[0017] Triethylene glycol butyl ether 50%-55%.

[0018] After adopting the above scheme, the metal powder configured in proportion can make the solder have better wettability and ductility, soften the texture and reduce stress damage, have excellent anti-oxidation ability, reduce the leakage current of the surface electric field, and can also reduce the use...

Embodiment 3

[0019] Embodiment three: low-junction temperature solar diode soldering agent is characterized in that: by weight percentage, is made up of 68% metal powder and 32% flux, and described metal powder is by weight percentage by the lead of 92.5%, 44.% Tin, 3% silver and 0.1% indium, the composition contained in the flux is disproportionated rosin 40%, malonic acid 6%, tartaric acid 4%, phenylacryltriazole 5%, hydrogenated castor Sesame oil 5%, the balance is organic solvent, and organic solvent comprises tetrahydrofurfuryl alcohol and triethylene glycol butyl ether, and the mass percent of each composition in described organic solvent is,

[0020] Tetrahydrofurfuryl alcohol 46-48%

[0021] Triethylene glycol butyl ether 52-54%.

[0022] After adopting the above scheme, the metal powder configured in proportion can make the solder have better wettability and ductility, soften the texture and reduce stress damage, have excellent anti-oxidation ability, reduce the leakage current o...

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PUM

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Abstract

The invention relates to a low-junction-temperature solar diode welding agent. The low-junction-temperature solar diode welding agent consists of, by weight, 65%-70% of metal powder and 30%-35% of scaling powder. The metal powder consists of, by weight, 92.5% of lead, 44% of tin, 3% of silver and 0.1% of indium. The scaling powder comprises the compositions including, by weight, 35%-45% of rosin derivatives, 3%-7% of malonic acid, 3%-7% of tartaric acid, 3%-7% of 1,2-aminoazophenylene, 3-7% of hydrogenated castor oil and the balance organic solvent, the organic solvent comprises tetrahydrofurfuryl alcohol and triethylene glycol momobutyl ether. The low-junction-temperature solar diode welding agent is good in activity, high in antioxidant ability, not prone to volatilizing and low in cost.

Description

technical field [0001] The invention relates to a welding agent, in particular to a low junction temperature solar diode welding agent. Background technique [0002] In the process of diode production, flux is often used for welding chips and other parts. The flux is generally composed of metal solid solder and flux. The flux generally uses alcohol liquid with a low boiling point as an organic solvent. During the soldering process Due to the high volatility of the organic solvent, the concentration of the soldering flux will increase, and diluents need to be continuously added, which increases the cost. The existing soldering agents still have poor activity and low oxidation resistance. Contents of the invention [0003] The object of the present invention is to provide a low junction temperature solar diode soldering agent with good activity, high oxidation resistance and low volatility. [0004] The technical scheme that realizes the object of the present invention is a...

Claims

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Application Information

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IPC IPC(8): B23K35/26B23K35/362B23K35/12
CPCB23K35/0255B23K35/268B23K35/3612B23K35/362
Inventor 徐谦刘秀琴郭建新黄慧平朱小栋
Owner CHANGZHOU GIANTION PHOTOELECTRICITY IND DEV