[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: How to aggregate separate wells?
From: |
Steven Rubin |
Subject: |
Re: How to aggregate separate wells? |
Date: |
Thu, 13 Sep 2001 17:48:14 -0700 |
1. I get literally dozens of DRC errors telling me that wells of the same
type
are too close togeher. What I really wanted is for the transistors to
reside in
one well (actually I would like a few wells total instead of one
transistor per
well, but
I assume you understood that), but I cannot see how to tell them that. I tried
to put the transistors close together so that their wells could merge, but
Edit->cleanup
facet->merge implants sometimes puts them apart. I tried to bind the
transistors
in one
well by adding a pure layer, but cleanup facet undoes what I do.
I haven't looked at your design, but you should place the well only when
you are done with design. That way, these pure-layer nodes won't interfere
with the design rules. Also, the automatic well placement routine may need
work. It removes all pure layer nodes and calculates new ones. You might
want to simply place one large one with "New Pure Layer Node".
If I make an experimental facet and try to put transistors with metal-1
connections of the same type close together, I get DRC violation as long as I
can clearly identify two wells.
As soon as I merge the wells, DRC goes away. I would like this done in the
aforementioned
layout too, the only problem is I cannot move transistors around since the
soil is extremely crowded.
I tried to look at your progress URL, but I can't reach it. Perhaps you
can EMail a small library that illustrates these problems.
2. Does compaction from tools menu work at all or does it need to have no DRC
errors to function properly?
It should work, but it is not very robust.
3. When exporting to EPS, the export labels appear _below_ metal layer
instead of on
top of everything. This way letters get hidden behind metal layers and I
need to move
them away from the arcs et al. so I can see them printed.
The labels should be in the same place on the PostScript page as they are
in the layout. If the name is over an arc in the layout, it will be in
PostScript. But since PostScript is Black&White, this may make it hard to
read.
4. Is there a command which says "Go to the selected node and turn on a
designated zoom
level"? This would be useful since I have only two scales at which I look
at the
layout:
the ctrl-9 one and a 'design one' which is at present two zoom-ins from
ctrl-9.
I don't understand the meaning of "zoom level". What Electric commands do
you wish to perform?
-Steven Rubin