Briefly: 1) Send back to supplier as their problem 2) Yes: have seen de/non wetting on perimeter and middle of spotted stains (where marking most evident= thicker?) 3) N/A Good Luck Mike Fenner Indium Corporation of Europe T: + 44 1908 580 400 F: + 44 1908 580 411 M: + 44 7810 526 317 W: www.indium.com -----Original Message----- From: TechNet [mailto:[log in to unmask]]On Behalf Of Bev Christian Sent: Thursday, July 12, 2001 11:37 PM To: [log in to unmask] Subject: [TN] Staining on Gold TechNetters, I have checked the archives and have not been successful in finding sufficient info on the titled subject. Either I have not done a diligent enough search or the info is not there. So, here are my questions. 1) If you were presented with varying amounts of what looks like water stains on immersion gold pads how would you determine its composition? No guesses now, I can do that. I want to know how people have actually done it! Also, I am not referring to "purple plague" but just slightly off color gold. 2) Has anyone ever been able to correlate amount of staining to solderability issues? Or is it a non-issue? 3) Has anyone seen staining cause problems with respect to keypad electrical continuity? regards, Bev Christian Research in Motion ---------------------------------------------------------------------------- ----- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------- ----- --------------------------------------------------------------------------------- Technet Mail List provided as a free service by IPC using LISTSERV 1.8d 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 delivery of Technet send the following message: SET Technet NOMAIL Search previous postings at: www.ipc.org > On-Line Resources & Databases > E-mail Archives Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------