|vlsitechnology.org /Linux help/CIF layout|
Linux Live CD
The layout of all the cells has been converted to CIF format in 0.13µm technology. It can be found at
The CIF files have been written from Magic and then hacked with a script
The CIF format only defines layout geometries, so extra features like an abutment box and text are defined with user extensions. Alliance uses an extension coming originally from the company VLSI Technology. Magic uses an extension from Mead and Conway. This is why a script is needed to put an Alliance abutment box into a CIF file written from Magic.
Magic also doesn't understand REF geometries so these too have to be put in with a script.
The CIF files have the diffusion geometries both as separate N and P diffusions and as a single diffusion layer with separate N and P implant layers. The layer definitions can be found in the file
in the section TABLE CIF_LAYER.
These are the MOSIS layer definitions, not the Alliance ones.
The CIF files can be viewed with Dreal. The right environment can be set up by sourcing the README file in each CIF directory. The example on the right shows the CIF layout of the vsclib an2v0x1 cell in 0.13µm with separate N and P diffusions and as a single diffusion layer with separate N and P implant layers.