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October 2004

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Subject:
how clean is clean
From:
Joyce Koo <[log in to unmask]>
Reply To:
[log in to unmask]
Date:
Fri, 1 Oct 2004 10:24:57 -0400
Content-Type:
text/plain
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text/plain (19 lines) 
Gurus,
for a device, (fine pitch, like CSP, flip chip), how clean is clean (in
terms of extractable ionics using omega meter or ionograph).  I want as low
as 4.5 ug/sq inch (usd to be 6.45 ug/sq inch).  I think someone may tell me
to jump the lake....  What is the standard for CSP/flip chip or direct chip
attach?  Thanks.
Best regards,
                                           jk

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