发明名称 |
Organic solderability preservative compositions |
摘要 |
Known organic solderability preservatives (OSP) contain an azole compound and are applied on a copper surface from an acidic solution. The OSPs are not visible to the naked eye when applied. A number of dyes compatible with the OSP solution and not interfering with solderability has been identified. The composition containing such a dye can produce a layer which is visible to the naked eye when applied even in a thin layer. The suitable dyes contain a cationic imine group having the general formula <IMAGE> where X- is an anion such as chloride, iodide, sulphate, etc., or an organically bonded anionic group such as sulphonate.
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申请公布号 |
US5858074(A) |
申请公布日期 |
1999.01.12 |
申请号 |
US19970902198 |
申请日期 |
1997.07.29 |
申请人 |
NATIONAL RESEARCH COUNCIL OF CANADA |
发明人 |
COLE, KENNETH C.;PELLERIN, ERIC |
分类号 |
B23K35/36;C23F11/10;H05K3/28;(IPC1-7):C23F11/00;C08K5/16 |
主分类号 |
B23K35/36 |
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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