Hi Steve-

Being a mix of metals, with the bondable layer extremely thin, there are
more risks. We didn't have great luck with that finish, but that's probably
because we were used to nice, thick, soft gold, which can be screwed up, but
there's enough of it done that the providers have decent processes for
testing the bondability internally.

As far as I've heard, there are no differences in process temperature for
working with this finish. I would be extremely nervous trying to do fine
pitch with this finish because the tiny area allowed for the stitch bond has
more of a tendency to dig deeply into the surface. Reverse bonding can
resolve that.

So get a sample and qualify prior to commitment.

Wayne

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steven Kelly
Sent: Monday, January 19, 2015 11:22 AM
To: [log in to unmask]
Subject: [TN] ENEPIG & Gold wire bond

Hi All,
When wire bonding with 1 mil gold wire is their any difference in wire
bonding technique on ENEPIG versus electroplated soft gold?
Thanks. Steve Kelly

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