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Hi all, One silly question: :grin: Does Sky130 mea...
# sky130
m
Hi all, One silly question: 😁 Does Sky130 mean the length of the MOSFET transistor channel is 130nm? So why the DRC is saying it must be 150nm? I’m a little bit confused.
h
possible that the drawn length is not quite equal to the effective length with some mask shrinkage. That's just a guess though
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a
@User most of the time the drawn L is not the same as the actual L
Usually larger by the overlap
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m
But how do they calculate how much larger should be it? Is it experimental?
a
@User This a technology related thing. It's driven by the lithography used inside the foundry. It's usually a ratio to the Gate length
It's not calculated
m
@User “It’s not calculated (so it’s experimental)“. That’s exactly what I was looking for. Thank you.
a
It's not experimental as well
It can be calculated using lithography simulators/process simulators
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@User That's a complicated topic anyhow.
m
@User Oh, got it! Do you have such an experiment by yourself in real world? Or you learned about it at the uni. ?
a
@User I have about 16 years of experience in chip verification and working with foundries
But this question should have been covered in micro fabrication course in the University
I know that in Ain Shams University in Egypt Prof. Hany Fikry used give such course when I was a student about 17 years ago
@User I hope that answers your question
There is a course on YouTube that covers manufacturing in details. I need to look it up and I'll send it here
m
@User You answered my question, thanks a lot. It will GREAT to learn about it on YouTube. Thanks a million for your help. It was my pleasure to talk with you.
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