Hi Lenny, We do use both finishes but not interchangeably. SN100 HASL is very common and we are using it with great results. We typically use ENIG when there are fine pitch pads on the board and SN100 HASL for everything else to reduce costs. We are using the same paste, parts and processes for each of the finishes. Regards, Larry -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of Lenny Carter Sent: Wednesday, June 24, 2009 6:13 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 ----------------------------------------------------- Please be advised that this email may contain confidential information. If you are not the intended recipient, please do not read, copy or re-transmit this email. If you have received this email in error, please notify us by email by replying to the sender and by telephone (call us collect at +1 202-828-0850) and delete this message and any attachments. Thank you in advance for your cooperation and assistance. In addition, Danaher and its subsidiaries disclaim that the content of this email constitutes an offer to enter into, or the acceptance of, any contract or agreement or any amendment thereto; provided that the foregoing disclaimer does not invalidate the binding effect of any digital or other electronic reproduction of a manual signature that is included in any attachment to this email. --------------------------------------------------- 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 -----------------------------------------------------