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September 2006

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Subject:
From:
Franklin D Asbell <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Franklin D Asbell <[log in to unmask]>
Date:
Tue, 19 Sep 2006 07:55:17 -0500
Content-Type:
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text/plain (115 lines)
I'm surprised the percentage of OSP still being processed.

Franklin

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Tuesday, September 19, 2006 7:19 AM
To: [log in to unmask]
Subject: Re: [TN] ENIG

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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