[Pcb-bugs] [Bug 1399656] Re: DRC errors for precisely minimum distance

[DJ D. <13...@bu...>]

Could you upload a sample board that fails?  There might be some
rounding issues in the mil-nm conversion...

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Title:
  DRC errors for precisely minimum distance

Status in PCB: Printed Circuit Board CAD package:
  New

Bug description:
  I was designing a break out board for a chip, so I needed to use
  really thin wires. Anyways, I had the minimum wire width (and spacing)
  set to 5.91 mil while routing my board and everything seemed to work
  well and I didn't get any DRC errors. Anyways, when I restarted pcb
  and made a new DRC, I started getting errors claiming that the minimum
  widths and spacings were violated in several places even though the
  distances were given in the error equal to the minimum width. An
  example:

  Line width is to thin (5.91 mil)
  Process specifications dictate a minimum feature-width that can readily be produced
  Required: 5.91 mil

  Note here that it states 5.91 mil in both places. The DRC errors went
  away if I lowered the minimum requirements to 5.90 mil.

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