Hi, We are introducing a new process and we want to know the effect this has on the intermetallics formed in the solder joint. In order to compare the intermetallics formed during the surface mount process to those formed in the new process, we want to cross-section a joint and then etch the cross-section so that we can differentiate the intermetallic layer from process a to process b. My question is this, what etchant would produce this effect? Thanks, Josee --------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8e To unsubscribe, send a message to [log in to unmask] with following text in the BODY (NOT the subject field): SIGNOFF Technet To temporarily halt or (re-start) delivery of Technet send e-mail to [log in to unmask]: SET Technet NOMAIL or (MAIL) To receive ONE mailing per day of all the posts: send e-mail to [log in to unmask]: SET Technet Digest Search the archives of previous posts at: http://listserv.ipc.org/archives Please visit IPC web site http://www.ipc.org/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------