Yes, in fact I have. I analysed equipments from our tropical customers, and it looked like your images. In our case, it was simply humidity (read: contaminated and ion rich water) that had penetrated the coating, which lifted, followed by severe electromigration and ordinary chemical corrosion. I'll consider if it's possible to send some photos to you offline. Anyway, you can study the below little papyrus. I'm surprised that you, Brian Ellis, ask for things that are your own specialties...he-he...little butter in the wintertime. http://www.empf.org/empfasis/dec04/coat1204.htm Inge ----- Original Message ----- From: "Brian Ellis" <[log in to unmask]> To: <[log in to unmask]> Sent: Monday, December 04, 2006 5:27 PM Subject: [TN] water water everywhere! > The following files show the two sides of a PCB in a professional > weather station. This shows four dark areas which the manufacturer has > ascribed to water penetration. These are centred on a hole. The whole > thing seems funny to me, as it has happened on only a few of the holes. > I understand that it was housed in a water-tight case, not very far from > the Pacific coast. I was not able to ascertain the laminate type, but it > would not surpise me if it were paper based (FR3?). > > Has anyone seen anything like this? > > Brian > > http://www.realweatherstation.com/FILES/DSCN9441.JPG > http://www.realweatherstation.com/FILES/DSCN9440.JPG > > --------------------------------------------------- > 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 -----------------------------------------------------