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September 2006

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Subject:
From:
Wayne Thayer <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Wayne Thayer <[log in to unmask]>
Date:
Tue, 19 Sep 2006 09:01:29 -0400
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Is that an error on the pie chart?  It lists both Immersion Gold and
NiAu, but no ImAg!

>>> [log in to unmask] 9/19/2006 8:18:55 am >>>
Mornin' Inge and Everybody!

I have the chart that Inge sent me posted. It's at:
http://stevezeva.homestead.com/files/PCB_Finish.jpg

Actually, I'm not surprised at all. From my own perspective at my
current employer, I can count the number of ENIG boards we build here
on
one hand... everything else is HASL. I haven't built an OSP finished
PCB
since I was out in California in 1999, and I've only built one ImAg
PCB.
At my last employer we built a few more ENIG boards, but the
overwhelming percentage was HASL...more like 85-95%.

-Steve Gregory-

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Ingemar Hernefjord
(KC/EMW)
Sent: Tuesday, September 19, 2006 5:32 AM
To: [log in to unmask]
Subject: Re: [TN] ENIG

I've seen all answers on your question. I'm surprised that ENIG has
such
a low part of the total market, just some 3%, while HASL has more than
60%. See tart statistics which I send to Steve's wall. The statistics
is
from McMurdy.
Inge


-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Dan Skweres
Sent: den 18 september 2006 23:54
To: [log in to unmask]
Subject: [TN] ENIG

We have, at times, had an outside plating service have difficulties
with
plating of ENIG on our bare boards. The interesting anomaly we have
encountered is lack of plating on certain pads. They tell us there is
something on the surface of the pads but when they return the panels
to
us we micro etch (copper looks beautiful) and all pads look similar in
appearance. We even took a panel and coated immersion white tin with
out
problems. This tells me that there isn't any thing on the surface of
the
copper. There is one thing I did leave out. The pads that aren't
taking
ENIG all happen to be in the same net. Has anyone encountered this?
It's
almost like there is a charge being created in certain nets not
allowing
the ion exchange to happen. Could it be entrapped chemistry within
vias?
Any help and/or direction would be greatly appreciated.
Thanks,


Dan Skweres
Engineering Manager
Bartlett Manufacturing
Phone:847-639-2102 Ext.#230
Fax:847-639-8838


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