Some offset between the metal interconnection and cells from

[Min Pan]

Hello, everyone

I used Sillicon Ensemble to do Standard Cell P&R. After I finished
doing P&R, I streamed out the GDSII file and tried to stream into the
DFII Design Environment.

I can streamed in the GDSII successfully. However, there's some offset
between the cells and the metal interconnections. So the metals in the
cells and the interconnections are messed up. DRC failed.

I looked through the map files used by SE and icfb. I found there's
two layers called CELLM and CELL in the map file used by SE. But
there's no such layers in the map file used in streaming in the GDSII.
So those layers were skipped. I'm wondering if this could be the
reason. I have tried to map those two layers to the layers called
BNDRY in the map file used by icfb but it didn't work. The offset
still exists there.

What may be the cause of this problem? Any help is appreciated.

Thanks.

Min Pan
e-mail: panmin@iastate.edu

 

[Rajeswaran M]

Do you have "prBoundary" layer? If not entire bBox of the cell will be
considered as boundary.

panmin@iastate.edu (Min Pan) wrote in message news:<f1332796.0307100812.23dbd7db@posting.google.com>...

Hello, everyone

I used Sillicon Ensemble to do Standard Cell P&R. After I finished
doing P&R, I streamed out the GDSII file and tried to stream into the
DFII Design Environment.

I can streamed in the GDSII successfully. However, there's some offset
between the cells and the metal interconnections. So the metals in the
cells and the interconnections are messed up. DRC failed.

I looked through the map files used by SE and icfb. I found there's
two layers called CELLM and CELL in the map file used by SE. But
there's no such layers in the map file used in streaming in the GDSII.
So those layers were skipped. I'm wondering if this could be the
reason. I have tried to map those two layers to the layers called
BNDRY in the map file used by icfb but it didn't work. The offset
still exists there.

What may be the cause of this problem? Any help is appreciated.

Thanks.

Min Pan
e-mail: panmin@iastate.edu

 

[Han Speek]

Min Pan wrote:

Hello, everyone

I used Sillicon Ensemble to do Standard Cell P&R. After I finished
doing P&R, I streamed out the GDSII file and tried to stream into the
DFII Design Environment.

I can streamed in the GDSII successfully. However, there's some offset
between the cells and the metal interconnections. So the metals in the
cells and the interconnections are messed up. DRC failed.

I looked through the map files used by SE and icfb. I found there's
two layers called CELLM and CELL in the map file used by SE. But
there's no such layers in the map file used in streaming in the GDSII.
So those layers were skipped. I'm wondering if this could be the
reason. I have tried to map those two layers to the layers called
BNDRY in the map file used by icfb but it didn't work. The offset
still exists there.

What may be the cause of this problem? Any help is appreciated.

Thanks.

Min Pan
e-mail: panmin@iastate.edu

Hi,

I'm not quite sure why one would use GDSII to go from SE to dfII. The
normal way, as far as I'm aware, is to write out the design in DEF, and
import that into dfII. I've never had a problem doing it that way !

Streaming out the design from SE doesn't make sense anyway, as you don't
have the full cell layouts there, only the abstract views....

Best wishes,

Han.

--
Han Speek
E-mail: Han.Speek@philips.N0SP@M.com (Remove .N0SP@M to reply)