Hi Elina,IPC LF Listservers, Let me give you one item I found fast. Keep us, or even just me updated and educated on web links; particularly, if you find something with Im-Sn. ------------ TIN-PLATING, TIN-NICKEL ELECTROPLATE AND TIN-PLATING OVER NICKEL AS FINAL FINISHES ON COPPER Author : Phillip E. Hinton Author Company : Hinton PWB Engineering Date : 09/10/1996 Conference : Surface Mount International Abstract : Tin-plating over copper for printed boards is a solderable lead free substitute for other final finishes. It can be applied by conventional printed board manufacturing process. Concern over tin whiskers and tin pest and ways of decreasing these possible problems are discussed. -------------- You can access this document if you are an SMTA member. -------------- Lots of this research was done back in the 60's and maybe some in the early 70's for the printed circuits industry. You will have to use one of the technical data bases to get at this information. Fast thoughts are BRS ?? / Dialog / and a few others. You might also search another industry like the surface finishing for metals and plastics that might have current information. YiEngr, MA/NY DDave -------------------------------------------------------------------------------Leadfee Mail List provided as a service by IPC using LISTSERV 1.8d To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Leadfree To temporarily stop delivery of Leadree for vacation breaks send: SET Leadfree NOMAIL Search previous postings at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -------------------------------------------------------------------------------