Hi, I thought that the gold flash on bare copper tracks was to reduce the nickel layer oxidising thereby ensuring a good solderable surface, provided it is stored under dry conditions (is it 12 months?). Not much help to you but I am sure there are many gurus out there who know all about nickel and are dying to spread their know how. Best of luck Barry -----Original Message----- From: Wenger, George M (George) [SMTP:[log in to unmask]] Sent: 26 February 2001 23:56 To: [log in to unmask] Subject: Re: [TN] RF Shield *** WARNING *** This mail has originated outside your organization, either from an external partner or the Global Internet. Keep this in mind if you answer this message. Richard, Have you every heard of anyone having problems soldering to nickel? Regards, George George M. Wenger DMTS Bell Laboratories Princeton, Supply Network Solutions Engineering Research Center FMA / AQA / RCA Lab (609) 639-2769 (Office); 3210 (Lab); 2343 (Fax) [log in to unmask] -----Original Message----- From: peter lee [mailto:[log in to unmask]] Sent: Monday, February 26, 2001 5:22 PM To: [log in to unmask] Subject: [TN] RF Shield Hello, I am investigating the solderability of different elect. finishing of RF shields. So far I notice significant difference between tin and nickel finish. The particular 1"x1" brass shields with nickel plating that I am evaluating does not seem to have very good wetting at it's root and PCB junctions after reflow. The paste is alpha WS678. Does anyone else have solderability problems with nickel finish shields? What else would you recommend? Under what design concern/criteria would one select nickel finish? Thank you. Peter Process engineer __________________________________________________ Do You Yahoo!? Get email at your own domain with Yahoo! Mail. http://personal.mail.yahoo.com/ ---------------------------------------------------------------------------- ----- 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 ------------------------------------------------------------------------------- -- ******************************************************************** This email and any attachments are confidential to the intended recipient and may also be privileged. If you are not the intended recipient please delete it from your system and notify the sender immediately by telephoning +44(1252) 373232. You should not copy it or use it for any purpose nor disclose or distribute its contents to any other person. ******************************************************************** --------------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------------