It really "depends" and doesn't seem to have as much to do with solderability as it does with the dreaded tin whiskers. We don't do medical but we do some DOD and they are hell on tin whiskers and tin finished component leads. KennyB -----Original Message----- From: John Burke [mailto:[log in to unmask]] Sent: Thursday, May 10, 2007 8:45 AM To: [log in to unmask] Subject: Re: [TN] PCB assembly for medical devices WOW, Before someone says "it depends" can I just point out that the medical device manufacturer should be controlling the BOM and also should in most cases be requiring FDA tracking of the actual components used in the assembly. John John Burke (408) 515 4992 -----Original Message----- From: TechNet [mailto:[log in to unmask]] On Behalf Of BADRI Sent: Thursday, May 10, 2007 6:01 AM To: [log in to unmask] Subject: [TN] PCB assembly for medical devices Dear All, We have just started assembling some PCBA's to a medical device manufacturer. They hate lead free. The question is as follows: The components are leadfree and the paste used is leaded. Is it ok or do I have to pretin all the components with lead and then process. We have processed couple of boards without pretinning and we have not faced any issue. Will the devise manufacturer accept it. Please advise on the right process. Advance thanx Badri --------------------------------------------------- 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 -----------------------------------------------------