Ken Pelic wrote:

> Dear Forum members,
>
> I submitted a design for fabrication that was put on hold for sub-5mil
> copper spacing, a conflict with our fab drawing notes.  So far, I have
> located one case where different nets are 4.2 mils apart in the gerbers
> (using CAMtastic) yet Protel's DRC failed to flag this violation with the
> Clearance Constraint design rule set to 5 mils, different nets, board scope.
> I tried to manually measure the suspect spacing in Protel and found that
> with the snap grid set to the minimum of 1 mil, the Measure Primitives
> process still returns a value of 5 mils.  I have tried different grid
> settings but cannot get a value of less than 5 mils...am I missing something
> here?

Don't use measure primitives, use Report Measure Distance.  You may have
to set the snap grid to a small value, like .01 mil while you are doing the
measuring.

Jon

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