Hi Ron. Similar situation here. The board was a standard HASL finish and Sn62/Pb/36/Ag2 paste was used. The reason being a ceramic resonator had a Ag flash coating and silver leaching was a concern. Now more time is spent in design to not force the use of Ag content solder by careful part selection. It works too, eliminated Ag in our new board. Alex -----Original Message----- From: Vandendolder, Ron [mailto:[log in to unmask]] Sent: Thursday, May 09, 2002 11:27 AM To: [log in to unmask] Subject: [TN] 63/37 solder paste with silver plated boards Dear Technetters, We would like to change from sn 62/pb/36/ag2 solder paste to standard tin lead eutectic for silver plated boards. Does anyone know if there are any issues with silver leaching that would force us to remain with the Ag paste. We started using the Ag paste years ago and now no one remembers why. The silver plating on the boards is very thin (immersion 3-8 micro inches). Regards, Ron VandenDolder Telaxis Communications -------------------------------------------------------------------------------- - 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 e-mail to [log in to unmask]: SET Technet NOMAIL 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/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 e-mail to [log in to unmask]: SET Technet NOMAIL 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/html/forum.htm for additional information, or contact Keach Sasamori at [log in to unmask] or 847-509-9700 ext.5315 ---------------------------------------------------------------------------------