Anti-corrosion solution for reduction and prevention of corrosion whiskers

摘要

In 2007, the Tin Whisker User Group of the International Electronics Manufacturing Initiative (iNEMI) approved a new classification for matt and bright tin electrodeposits (see table 1) [1], revising the previous 2006 classification which had incorporated the use of bright tin electrolytes. This revision also implicated the tendency of bright electrodeposits to provide a highly-stressed crystal structure, together with a high carbon content which would influence whiskering [2,3] compared to the matte tin standard. These recommendations, however, were predominantly based on experiences gained from the first generation of bright tin processes, a 'far cry' from present 'state of the art' technology. The excellent performance of the latest bright tin processes has been well-proven, based on extensive whiskering studies (presented on several occasions) demonstrating no increased risk, compared to matte tin electrodeposits.[4-7].