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September 2006

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Subject:
From:
"Ingemar Hernefjord (KC/EMW)" <[log in to unmask]>
Reply To:
TechNet E-Mail Forum <[log in to unmask]>, Ingemar Hernefjord (KC/EMW)
Date:
Thu, 14 Sep 2006 08:52:40 +0200
Content-Type:
text/plain
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text/plain (61 lines)
Chris,

Why do youi put the question? I've never heard about practical
in-field-use problems based on ionic level diff between the two
treatments. Never. Academics can always find hair cleaving topics, but
we working with design production and marketing are more interested in
the question "do they work?"

Inge

-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Chris Ball
Sent: den 12 september 2006 20:19
To: [log in to unmask]
Subject: [TN] bareboard cleanliness related to surface finish

Hello Gurus-

Is it fair to expect a higher contamination on a HASL finished bareboard
than, say ENIG? I would have expected the same level of cleanliness when
receiving the bareboards, but new supplier says they have different
levels for different finishes.

We specify tighter than std. IPC levels and never varied the spec due to
surface finish. Requests for exceptions have been rare and not related
to surface finish.

Any comments appreciated,
-Chris


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