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Superspeed pure-tin electroplating additive

A technology of tin electroplating and additives, which is applied in the field of ultra-high-speed pure tin electroplating additives, can solve the problems of black coating, unqualified quality, and burnt materials, etc., and achieve the effects of easy degradation, good oxidation resistance, and accelerated electroplating efficiency

Inactive Publication Date: 2019-06-18
JIANGSU AISEN SEMICON MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] At present, all high-speed pure tin electroplating additives on the market use a current density range of 10-25ASD. If it is higher than 25ASD, there will be blackening of the coating and burning of the material, which will lead to poor quality, so it becomes Eliminates the bottleneck that cannot improve the efficiency of electroplating tin

Method used

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Examples

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Effect test

Embodiment 1～6

[0018] Configure ultra-high-speed pure tin electroplating additives according to the ratio in Table 1 and the following steps:

[0019] Add 30% amount of deionized water in proportion

[0020] When stirring, add non-ionic surfactant according to the proportion and stir evenly;

[0021] While stirring, add β-naphthol polyoxyethylene ether at a constant speed according to the proportion, and continue stirring for 5-10 minutes;

[0022] While stirring, add the alkyl glucoside at a constant speed according to the proportion, and continue stirring for 5-10 minutes after completion;

[0023] While stirring, add naphtholsulfonic acid at a constant speed according to the proportion, and continue stirring for 5-10 minutes;

[0024] While stirring, add EO / PO copolymer at a constant speed according to the ratio, and continue stirring for 5-10 minutes;

[0025] While stirring, add catechol according to the ratio, and continue stirring until completely dissolved;

[0026] Make up to de...

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Abstract

The invention belongs to the technical field of electroplating, and relates to a superspeed pure-tin electroplating additive which is prepared from a formula as below: 3 to 5 percent by weight of non-ionic surface active agent, 5 to 10 percent by weight of beta-naphthol polyoxyethylene ether, 1 to 3 percent by weight of alkyl glycoside, 0.1 to 0.3 percent by weight of naphthol sulfonic acid, 0.5 to 1 percent by weight of EO / PO copolymer, 1 to 2 percent by weight of catechol, and the balance deionized water. According to the superspeed pure-tin electroplating additive provided by the invention,the electric current density of electrotinning can be improved to 40ASD, no scorching phenomenon occurs, the electroplating efficiency is greatly accelerated, and in addition, the superspeed pure-tinelectroplating additive is good in oxidation resistance, easy to degrade and more environmental-friendly.

Description

technical field [0001] The invention relates to the technical field of electroplating, in particular to an ultra-high-speed pure tin electroplating additive with good degumming effect and less attack on substrates. Background technique [0002] Because tin has the advantages of corrosion resistance, discoloration resistance, non-toxicity, easy brazing, softness, low melting point and good ductility, it is generally used as a coating material to be plated on the surface of electronic components. The specific reaction principle is to use tin as the anode and electronic components as the cathode, and two electrochemical reactions occur in a certain electrolyte solution: [0003] Anode: Sn-2e - →Sn 2+ (dissolution process of tin anode), [0004] Cathode: Sn 2+ +2e - →Sn (precipitation coating process on the chip original device). [0005] At present, all high-speed pure tin electroplating additives on the market use a current density range of 10-25ASD. If it is higher than...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D3/30
CPCC25D3/30C25D3/32
Inventor 陈春
Owner JIANGSU AISEN SEMICON MATERIAL CO LTD
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