Hello Poh Kong,

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

*************************************************************************
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]
*************************************************************************





Poh Kong Hui <[log in to unmask]>
Sent by: TechNet <[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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