Hi Lenny, Assuming that you are using FR4 material 100% Sn HASL (~300°C) will degrade the material significantly. I would expect frank delamination. The PWB failure mode is delamination, in the field the board would be prone to CAF and failure due to shorting. Paul Reid -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Lenny Carter Sent: Wednesday, June 24, 2009 8:13 AM To: [log in to unmask] Subject: [TN] ENIG and SN100 HASL compatability? Fellow Technetters- We design, build and ship our own electronic assys from one lean facility in the US. 3-4 years ago went ROHS like most others, and we settled on ENIG pcb finish and havent looked back. We have a pcb manufacturer who wants us to try some SN100 finished ROHS pcbs as an alternative to ENIG for the few pcbs we by from him. I have some sample arrays to build on, but the assys are expensive and figured I would first ask those of you who know- Is SN100 HASL finish common? and is it fairly interchangeable with ENIG from a paste and component finish compatibility and process perspective? Are others readily building between SN100 & ENIG assys with little or no changes? I understand this is a very subjective questions with many variables, but I am posting this as a starting point. Thanks, Lenny Carter --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a service by IPC using LISTSERV 15.0 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-615-7100 ext.2815 -----------------------------------------------------