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May 1999

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Subject:
Re: SMT Plus Libraries for design
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Date:
Fri, 14 May 1999 00:21:19 EDT
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I spoke with one of the authors of the 275 document and she mentioned that
many of the patterns in this spec are too large.  The release process of the
document along with rounding errors caused the parts to be larger than were
originally architected.  Therefore, I take the 275 spec with a grain of salt.
 We have used the SMT Plus library for over a year now and are very happy
with their library.  We have found a couple errors but overall are very good.
 We design high volume smt assemblies for telecom and our high volume smt
suppliers have not had a problem with the land patterns.

Frank Hinojos
Wireless Products Group
Watkins-Johnson Co.

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