From: Chris Padilla (firstname.lastname@example.org)
Date: Tue Aug 08 2000 - 12:27:07 PDT
From an EMI perspective, I have yet to notice any
measurable difference between "thieved" and "non-
We tell our fab vendor to keep the pattern at least
400 mils away from any trace, via, pad, part, etc.
As you point out, thieving increases manufacturability
by minimizing warping of the board.
>A thieving pattern is a bunch of very small shapes
>added to a layer that helps equalize the plating
>across a given layer (increases manufacturability).
>An auto thieving utility or program uses a set of
>criteria to determine how and where to put these
>shapes. Unfortunately these programs are almost
>exclusively focussed on mfg issues and not SI or
>Usually if you see a bunch of 1/16" width diamonds
>on an artwork layer, this is thieving.
>From: Ray Anderson [mailto:email@example.com]
>Sent: Monday, July 31, 2000 11:12 AM
>To: Greim, Michael
>Cc: SI LIST
>Subject: Re: [SI-LIST] : Effects of thieving on SI and EMC.....
>OK, I'll bite. Educate me, what is a thieving pattern,
>and an auto-thiever ????
> > Does anyone out there have a tool or reference
> > that would allow one to calculate the effects of
> > thieving patterns on signal integrity and EMC.
> > I am trying to come up with appropriate rule sets
> > for driving an auto-thiever utility.
> > Thanks for the help.
> > MG
>**** To unsubscribe from si-list or si-list-digest: send e-mail to
>firstname.lastname@example.org. In the BODY of message put: UNSUBSCRIBE
>si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
>si-list archives are accessible at http://www.qsl.net/wb6tpu
**** To unsubscribe from si-list or si-list-digest: send e-mail to
email@example.com. In the BODY of message put: UNSUBSCRIBE
si-list or UNSUBSCRIBE si-list-digest, for more help, put HELP.
si-list archives are accessible at http://www.qsl.net/wb6tpu
This archive was generated by hypermail 2b29 : Wed Nov 22 2000 - 10:50:59 PST