[Libre-soc-bugs] [Bug 526] create dry-run 180nm GDS-II files for IMEC

bugzilla-daemon at libre-soc.org bugzilla-daemon at libre-soc.org
Mon Nov 30 15:41:31 GMT 2020


https://bugs.libre-soc.org/show_bug.cgi?id=526

--- Comment #73 from Jean-Paul.Chaput at lip6.fr ---
(In reply to Luke Kenneth Casson Leighton from comment #72)
> (In reply to Jean-Paul.Chaput from comment #70)
> 
> >   For the future, people should be able to choose between, at least A and B,
> >   given the tradeoff they want.
> 
> Plan D: adapt Staf's FlexLib to use the Skywater 130nm PDK, then make some
> (reasonable) assumptions similar to Plans A or B based on (reasonable but
> to-be-verified) assumptions that things will scale

  Constantly forgot about this one. Yes, if NDA goes away, then most
  of our problems also does. And A & B fuse.

  And yes, we should definitely provides support for Skywater,
  but we must focus on our immediate target.

> of course if the target *is* Skywater 130nm then no A/B compromises need to
> be made.
> 
> going to a larger geometry (180nm) my intuition expects that scaling up the
> Skywater 130nm PDK would be fine, however to a smaller one (110nm or below)
> would be a different story.

  Yes, but devil is in the details... So it may be not as straightforward.
  At least, it is our experience that every port has to be carefully
  crafted whatever the apparent symplicity.

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