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Hello,
How can I modify the minimum gap between wires of same metal in SoC encounter ?
I modify the LEF tech file and then restore the design again in SoC encounter but the minimum gap is still not modified.
Does SoC encounter take the spacing data only when place and route and then forgets about them, so if I change them SoC encounter won't realize ?
Are you trying to modify the routed metal? or the metal of Standard cell layout?.
If routed metal, then it should be possible manually (if you are looking at few cases)
whereas the Metal of Standard Cell layout can't be modified unless you regenerate the LEF/FRAM models after changing the layout/
I'm trying to modify the gap between two routed metal wires of same metal. I modified two files "NangateOpenCellLibrary.lef" and "NangateOpenCellLibrary.tech.lef" for the minimum spacing between metal4 wires to be from 0.14u to 0.07u, but I still can't decrease the spacing between the two metal4 wires in the layout to this limit (using move wires).
.
Another question, do you know if I can add a new net which is not in the netlist ? (I want to draw new wire and assign to it a net name which is not found in the netlist, is it possible?) If not can I edit the netlist to add this new net ...from SoC encounter ?
When I add a new wire manually using "Add wire", i should assign a net name before drawing so if I assign a new name I have an error "net name is invalid" and if I assign a name in the netlist (hopping to change it to a new name afterwords) I find that the net name of the wire is non-editable.
Once you update the tech files, reload the design using restoreDesign command.
This should update the rules.
Unless you are having some DRC while routing the new route [reducing the space of metal], the change should be possible.
First of all, You need to confirm that the M4 spacing is 0.07u in Tech LEF.
Make sure to load the design again. restoreDesign (Assuming you are updating the Tech Lef directly - Initial File Only)
Can you retry using the resize button. Next to cursor button in your attached image ( 4 way direction ) . [Or In between Cursor button and Scale button]