I've heard of using silver based solder when you have a gold finish PCB like an ENIG finish, although I'm not clear on exactly why to use it for that. We don't use that finish. The only situation that we use 2% silver solder is for boards which have some ceramic resonator components installed that have a silver finish on them. This will avoid having the silver leach off the component and into the solder. -----Original Message----- From: Larry Koens [mailto:[log in to unmask]] Sent: July 25, 2001 2:10 PM To: [log in to unmask] Subject: [TN] solder paste with 2% silver Got a question for everyone, I just switched companies and the new company that I'm with now uses a 62/36/2 solder paste. I've always used the 63/37 formula. The guys who decided to use the 2% silver are no longer with the company. My question to you is, why would they want the 2% silver in the paste? They know something I don't?! Thanks, Larry ---------------------------------------------------------------------------- ----- 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 ---------------------------------------------------------------------------------