Can anybody share me that what's your flow to extract analog block lef in your company? For example, the tools? the extract flow?
I'try to extract block lef with abstract, but found there are many errors with the exported lef when I import it into encounter, this is my first time to use abstract, so I am worried that is there any other better way to generate analog block lef?
First you need to know what lef is and what information it contains. Lef is BPV or FRAM description in ASCII format.
Traditionally, ABSTRACT is used to generate b-level lefs, in other tools, for example, we have geNewMakeMacro in Astro to generate block (PR finished) FRAM view (or lef).
I think most of tools could generate LEF, you can even write your lef by hand if you are familiar with its rules.
My tech file contains pr info and rules. But the generated lef was not I want, for example, there
is one power line with width 10um, length 20um in the block, I want the lef file open all the power for above metal, but the generated lef usually only open the two ends of the power metal, so I need to modify the lef file hand by hand, this is not a good idea I think.