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January 2003

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Subject:
From:
Alain Savard <[log in to unmask]>
Reply To:
(Leadfree Electronics Assembly Forum)
Date:
Mon, 27 Jan 2003 15:40:44 -0500
Content-Type:
text/plain
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text/plain (44 lines)
You need to give a bit more details, like the kind of solder alloy and flux
you are using

-----Original Message-----
From: Rick Thompson [mailto:[log in to unmask]]
Sent: January 27, 2003 2:05 PM
To: [log in to unmask]
Subject: [LF] Immersion gold vs flash gold with Lead-free solder paste?


Has anyone had any experience using Lead-free solder paste on a Flash gold
finish?  We're currently having some solder wetting issues with lead-free on
flash gold where some of the pads on the boards exhibit complete lack of any
wetting.  It almost looks like what you get when you reflow solder paste on
a ceramic substrate, where the solder just balls up.  Is this an inherent
problem with flash gold or do I have some kind of abnormal processing issue
at the board vendor?

Thanks in advance.

Rick Thompson

Sr. SMT Process Engineer
SMTEK International, Inc.
+1 (805) 532-2800
[log in to unmask]


Rick Thompson

Sr. SMT Process Engineer
SMTEK International, Inc.
+1 (805) 532-2800
[log in to unmask]

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