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May 1999

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Subject:
From:
Ken Patel <[log in to unmask]>
Reply To:
"TechNet E-Mail Forum." <[log in to unmask]>, Ken Patel" <[log in to unmask]>
Date:
Tue, 11 May 1999 17:43:04 -0700
Content-Type:
text/plain
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text/plain (44 lines)
Guys,
This is urgent!!!
Our procurement spec is calling 100% continuity at maximum 10 ohms. One of
our fab has 3 mil line on 1/2 ounce copper. Fab house is saying that they
are measuring it around 13 ohms on 22" line. May be to be safe, he is asking
for deviation which allow him to pass up to 20 ohms.

The questions are:
(1) Is it OK to accept fabs with above condition?
(2) Can someone explain me why it's measuring higher than normal - does it
has to do with the trace width. (I do know for sure that resistance is
higher with higher length but less with bigger dia. Is it because of that?)
(3) Anything should I know more about the situation.

re,
ken patel
______________________________________________________
Ken Patel                       Phone:  (408) 490-6804
1708 McCarthy Blvd.             Fax:    (408) 490-6859
Milpitas, CA 95035              Beeper: (888) 769-1808

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