发明名称 |
Process for synthesizing a palladium replenisher for electroplating baths |
摘要 |
This invention provides a process of making a palladium replenisher comprising a complex of palladium tetraammine sulfate. The process includes distilling a palladium nitrate solution at a temperature maintained at or below about 115° C. Palladium sulfate and ammonium hydroxide are then added to make the palladium tetraamine sulfate replenisher from solution. The replenisher of the invention is used to replenish depleted palladium during palladium electroplating to maintain the palladium concentration in the bath within from about 5 to about 10 weight percent of recommended plating bath levels.
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申请公布号 |
US6346222(B1) |
申请公布日期 |
2002.02.12 |
申请号 |
US19990323607 |
申请日期 |
1999.06.01 |
申请人 |
AGERE SYSTEMS GUARDIAN CORP. |
发明人 |
ABYS JOSEPH ANTHONY;DULLAGHAN CONOR ANTHONY;EPSTEIN PETER;MAISANO, JR. JOSEPH JOHN |
分类号 |
C01G55/00;C25D3/50;C25D3/56;C25D21/12;C25D21/18;(IPC1-7):C01G55/00 |
主分类号 |
C01G55/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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