I don't know if U already solved Ur problem (I do hope so) but Im still going to share my excpirience regarding this issue...
I don't know what Ur process parameters are, but using soldering paste that contains 2% silver , should solve Ur problem.
Wetting preferences (ENIG) are not as good as when using HASL finish but are according IPC requirements...
Good luck!
Sasha
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Sasha Miladinovic - Production Engineering
Amersham Biosciences, PCB Production, Umeå
Tel: +46 (0) 90 150 232
Fax: +46 (0) 90 138 372
E-mail: [log in to unmask]
*************************************************************************
2003-02-27 13:18
Please respond to "TechNet E-Mail Forum."; Please respond to Poh Kong Hui
To: [log in to unmask] cc:
Subject: [TN] : Shining smooth solder joint on ENIG or Gold plating Board.
Hi Technetters,
Can someone advise me how to get a good smooth shining solder joint on the
ENIG board or board with gold plate SMT pads.
As I can understand that board subjected to reflow soldering, the solder
joint tends to look dull and not so smooth joint. But, is there any way to
get a good shining joint.
Thanks.
Poh
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