hi, one test would be a ftir analysis for organic materials. i suspect most test labs can do that. i believe ftir stands for 'fast fourier transform infrared. on the other hand it might stand for 'finds the incredible residue'. phil -----Original Message----- From: David Harman [mailto:[log in to unmask]] Sent: Wednesday, April 28, 2004 9:42 AM To: [log in to unmask] Subject: [TN] PCBA surface analysis I am looking for a lab in the bay area that offers surface analysis on PCBA. I am not looking for Ionic contamination but I am looking to see if there is any other substance that is inhibiting conductivity on our testers. We do not perform ICT on our boards; we go right from SMT into functional testing of the boards. Our tester applies pressure from the top, pogo pins are used to make contact for testing. One of the reported mechanisms for first failures is due to some sort of contamination on the board preventing it from making contact, cleaning the board appears to change the results. This contamination is something that we can not visually see. I would like to eliminate the possibility of contamination causing non-contact related issues therefore would like some suggestions on what type of testing to have conducted and if there is a local lab that can perform the surface test. We use a non-clean solder process. David Harman --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ----------------------------------------------------- --------------------------------------------------- Technet Mail List provided as a 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/contentpage.asp?Pageid=4.3.16 for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 -----------------------------------------------------