query reg pcell generation using SKILL

Hi all,
I have written a skill function in such a way that when I select a
MOSFET(that was instantiated from a technology library provided by the
vendor -- basically the Pcell of the vendor) in a layout and run my
function it automatically calculates the number of columns that has to
come in the POLY contact and it places the contact at an appropriate
position . I was wondering whether there is any possibility of
integrating this skill function into my Pcell. So that when I
instantiate a MOSFET I can automatically, have the poly contacts in
the instance itself.

Thanks and regards,
Lokesh

 

lokesh wrote, on 05/19/10 12:04:

Hi Lokesh,

The way you would probably best be doing this is to have your pcell be a
hierarchical pcell - i.e. it takes care of instantiating the vendor pcell, and
then additionally creates the contact as well.

But maybe I've misunderstood your requirements, as it wasn't entirely clear.

Regards,

Andrew.

 

Hi andrew,
I understood what you have told(And I don't know exactly how to
proceed with it -- that is creating a hierarchical Pcell).
Let me try to explain the problem clearly....
I have completely finished a skill code that can automatically do the
routing of source and drains, poly routing and placement of substrate
contacts for a MOSFET --- All of this DRC clean.
Now I wish to have GUI's(radio buttons) to have a choice whether to
keep a substrate contact on right or left of a MOSFET etc., (i guess
this is more like what 'rick' is trying to do recently --http://
groups.google.com/group/comp.cad.cadence/browse_thread/thread/
25eaa8e265a85c40#)
Andrew, I hope I have explained it clearly.. Please do throw some
light on the problem so that i can proceed in an efficient way...

Thanks and regards,
lokesh

 

lokesh wrote, on 05/28/10 10:12:

Hi Lokesh,

Well, the difficulty is that I don't know how much you know already. I suggest
you start by reading the documentation on pcells
<ICinstDir>/doc/pcellref/pcellref.pdf and then work out what you actually want
to do.

A hierarchical pcell is just a pcell that instantiates another pcell inside.
Nothing particularly clever about that...

And hopefully my replies to the specific questions from Rick will help?

Regards,

Andrew.