Commercial components vs lead-free terminations; how to manage it?

Some COTS suppliers can propose tin lead finish, but most of them comply with RoHS, meaning Pb-free finishes. In this presentation, several aspects of the lead-free terminations will be addressed. First, the finish selection will be presented, taking into account the compatibility with the current SnPb mounting process and also with a future lead-free mounting process. That includes some specific points to be detailed, like lead-frame materials, balls, under-layers, finish materials… Most of the COTS have 100% tin finish, so the pure tin management will be part of this presentation: in term of termination selection, whisker-free guaranty and alternative mitigation will be discussed.