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钎焊及时效过程中化学镀Ni-P与Sn-3.5Ag的界面反应

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Indexed by:期刊论文

Date of Publication:2010-06-15

Journal:中国有色金属学报

Included Journals:EI、PKU、ISTIC、CSCD

Volume:20

Issue:6

Page Number:1189-1194

ISSN No.:1004-0609

Key Words:化学镀Ni-P薄膜;Sn-3.5Ag钎料;界面反应;钎焊;时效

Abstract:研究磷含量为6.5%(质量分数)的化学镀Ni-P薄膜与Sn-3.5Ag钎料合金之间的润湿行为,以及Sn-3.5Ag/Ni-P焊点在钎焊和时效过程中的界面反应.结果表明:250 ℃时,直径为(2.3±0.06) mm的Sn-3.5Ag焊球在化学镀Ni-6.5%P薄膜上钎焊后得到的润湿角约为44?,铺展率约为67%;焊点界面由Ni3Sn4 IMC层、及较薄的Ni-Sn-P过渡层构成Ni3P晶化层;钎焊过程中界面Ni3Sn4 IMC的生长速率与钎焊时间t1/3呈线性关系;时效过程中界面Ni3Sn4 IMC及富P层的生长速率与时效时间t1/2呈线性关系.

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