The code in tool/io/output/LEF.java makes certain assumptions that apply
to every technology. It assumes that all metal layers are called "Mx"
where the "x" is a layer number. They assume that there are 3
polysilicon layers. The code also makes assumptions about the names of
every other layer.
LEF and DEF were new when these modules were written, and there have
never been any extensive uses of that file format. Now, decades later,
it is entirely possible that LEF/DEF has matured, but the Electric code
has not.
-Steven Rubin
On 11/20/2025 9:45 AM, Alexandre Rusev wrote:
Hello all!
I'm trying to import LEF files written by other tools for my current
technology.
Found that the LEF files are imported mot correctly.
I notices that at least metal layers names are not correspond to what
is used in technology ...
So I tried to export/import LEF files for MOCMOS.
While result import of exported file looks like to be the same as
original, my observations still raised some questions about how it works:
Why do we have metal layers called Mx but NOT the same as layer name
or or layer function
in mocmos.xml ?
Why do we have POLY3 here, which is not present in our technology?
- Alex
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