Daan, Can you use an Ersascope? I have never tried one but it's designed to inspect BGA solderings. http://www.ersa.de/en/index.html // Fred -----Original Message----- From: Daan Terstegge [mailto:[log in to unmask]] Sent: Monday, November 22, 2004 6:31 PM To: [log in to unmask] Subject: [TN] Solder resist inspection underneath components Hi Technet, I have a problem with a batch of boards of which I know that an estimated 50% of them have a problem with the soldermask. The mask (Dynamask 5040 dry film) is flaking off the board, and we didn't notice this because the mask is only applied underneath the components (and all of them have a low standoff, which makes it impossible to inspect). Now we need to know which of the boards are affected, but desoldering some of the parts to take a peek is not an attractive option as these boards are already parylene coated. I'm quite convinced that the answer is "no", but still I'd like to give it a try and ask the following question: Does there exists ANY technology (non-destructive) that makes it possible to inspect the quality of the soldermask underneath components? Best regards, Daan Terstegge PCB Assembly Department Thales Land & Joint Systems Tel +31(0)35 524 8297 Fax +31(0)35 524 8181 [log in to unmask] Unclassified Email --------------------------------------------------- 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 847-615-7100 ext.2815 ----------------------------------------------------- --------------------------------------------------- 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 847-615-7100 ext.2815 -----------------------------------------------------