Is this supposed to be a hard gold finish or ENIG?  If it is supposed to be hard gold, this is usually done for wear resistance on contact pads like these.  I would be concerned about a solder finish for two reasons.  First, it is softer and would not provide the wear resistance of a hard gold surface.  Second, HASL finishes are not as flat as gold, you may have a difficult time getting a good contact under the button.

Thanks,
Brad 

-----Original Message-----
From: IPC-600-6012 [mailto:[log in to unmask]] On Behalf Of CJGlz_gwtc
Sent: Wednesday, December 09, 2009 11:27 AM
To: [log in to unmask]
Subject: [IPC-600-6012] Gold Contacts with Solder Plated

Hello what could the possible impact that a PCB that it is supposed to have Gold Plated Contacts is with solder plated [Tin]. Can they be used. Any document that I can consult on the matter Please....
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