Hi all,

The compensation amount depends on many factors and can be as little as
zero.

What etchant are you using and what are the operating parameters of the
etchant?

Best regards,

Phil Culpovich

Date:    Tue, 31 Aug 1999 23:11:38 -0400
From:    "Michael D. Doty" <[log in to unmask]>
Subject: Re: Trace width & etch compensation factor

     Ken
         The rule of thumb is a .001" etch factor for 1 oz. and .0005" for
     .5 oz. copper. That is to say .0005" per edge of trace on . 1 oz and
     .00025 per edge on the .5 oz..

     Hope this helps.

     Mike Doty
     Hadco TCE


______________________________ Reply Separator
_________________________________
Subject: [TN] Trace width & etch compensation factor
Author:  Ken Patel <[log in to unmask]> at smtplink-hadco
Date:    8/31/99 6:44 PM


What is the widely used etch compensation factor provided on 1 oz copper and
.5 oz copper on a 4 mil trace? I mean how much more 4 mil line will be
beefed up by fab house before etching so that at the end he or she will get
required 4 mil trace width.

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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