talk to these guys about soldering silver.... good luck (poor wetting is
possibly blame...).

http://www.kester.com/faq_solder_alloys.html

jk
>-----Original Message-----
>From: TechNet [mailto:[log in to unmask]]On Behalf Of Jack C. Olson
>Sent: Friday, August 02, 2002 2:23 PM
>To: [log in to unmask]
>Subject: [TN] ASSY: Immersion Silver vs. Tin
>
>
>Greetings,
>
>A situation has come up that is beyond my experience.
>
>We sent some Immersion Silver boards to an assembly
>vendor and recieved an email saying:
>
>"We are progressing on your boards. The bad news is
>that the white tin flash used on the pads is awful.
>The solder is reflowing irregularly, if at all.
>We suspect that we'll have to touch every joint on
>every part to make a good connection."
>
>So my question to the group is:
>Is there a difference from an assembly process point of view
>between tin and silver?
>
>I'm hoping the root problem is related to their assumption
>that our silver boards were tin, but I don't know enough
>about it.
>
>Thanks in advance for any clues....
>
>Jack
>
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