Electronics Forum | Wed Nov 30 06:23:32 EST 2005 | wmeyers
Thanks Dave! Bill
Electronics Forum | Thu Mar 31 17:27:36 EST 2005 | russ
Are we possibly talking palladium instead of platinum? I haven't yet heard of platinum terminations (seems expensive) If it is palladium over nickel, I can tell you that you need to reach 225-230 Deg. C in reflow and the TAL should be about 90 sec.
Electronics Forum | Fri Apr 01 10:35:09 EST 2005 | shannond
Definitely platinum http://www.omega.com/Temperature/pdf/1PT100FR_RTD_ELEMENTS.pdf
Electronics Forum | Thu Mar 31 19:52:50 EST 2005 | davef
We agree with Russ that you're talking palladium instead of platinum. Your wetting problem likely is not the Pd-Ag surface layers, but the underlying metal or nickel to which you need to wet. Either a base metal is: * Contaminated and poorly wettabl
Electronics Forum | Thu Aug 29 20:02:58 EDT 2002 | davef
Often assemblers leave areas unsoldered for future component additions, modifications, and test points. On imm silver boards, these unsoldered areas become a real bear to solder/test later in life. One way to avoid that problem is deposit some solder
Electronics Forum | Fri Aug 30 04:44:31 EDT 2002 | jason
Hi Dave, Why does it become " a bear" if u leave it unsoldered ?? Does it oxidise or something ?? Question (1): Does Ag imm. PCB need to use Solder paste with AG ?? If yes, why. Question (2): Does Ag imm pcb have poorer surface finishes than HAS
Electronics Forum | Wed May 11 13:27:30 EDT 2005 | Sam Ho
i want to know which type of solder paste and reflow profile can support the solder pad with nickel but not covered gold on the pcb.
Electronics Forum | Wed May 11 13:50:30 EDT 2005 | russ
I would contact your paste supplier, bare nickel can be impossible to wet to. How oxidized is it?
Electronics Forum | Thu May 12 07:54:37 EDT 2005 | Rob
We talked about something similar here: http://www.smtnet.com//forums/index.cfm?fuseaction=view_thread&CFApp=1&Thread_ID=8051&#Message31805
Electronics Forum | Tue Aug 10 09:26:49 EDT 2004 | davef
You should be able to solder to brass - check with you flux supplier to get their recommendations. The flux you are using may not have enough activation to breakdown the oxides on the brass surface. A word of caution - brass (copper and zinc alloy)
