As part of the 4553 I Ag document, we ran I Ag as a surface finish for Membrane switch applications to 1 million cycles over approximately six months with NO failures. The 4553 recommends the use of I Ag for membrane switches for class 1 and class 2 but NOT class 3 applications. Gerard O'Brien Photocircuits Corporation Co chairman 4-14 plating committee. -----Original Message----- From: Cal Driscoll [mailto:[log in to unmask]] Sent: Monday, August 16, 2004 7:20 AM To: [log in to unmask] Subject: [TN] silver migration in membrane switches Hello all- I am looking for supportive documentation on Silver migration as it pertains to membrane switches. Any support on this would be greatly appreciated. Unfortunately, I do not have any additional information. This was just a request from my engineering group with no details. Thanks, Cal --------------------------------------------------- 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 -----------------------------------------------------