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Do I need to turn on DFM for research purpose?

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Frankinbel

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Hi guys,

I am a PhD student, working on an LDO design for RF energy harvesting. I have a question. Do I need to turn on DFM of DRC for research purpose not commercially?

Thanks,
Frankinbel
 

If you want to learn something about IC design, the answer should be yes, I suggest.
 

Thanks for replying. Seems the DFM has a much stronger constraint about the DRC rules and I really would like to learn more about it. Does it make a huge difference between tapeout results and simulaton result if I am not turning on the DFM just with "minrule"?
 

Frankinbel said:
Thanks for replying. Seems the DFM has a much stronger constraint about the DRC rules and I really would like to learn more about it. Does it make a huge difference between tapeout results and simulaton result if I am not turning on the DFM just with "minrule"?
Click to expand...

Yes it does. I have seen current and delay shifts in the order of 15%.
 

ThisIsNotSam said:
Yes it does. I have seen current and delay shifts in the order of 15%.
Click to expand...
Thank you. That is pretty big. I am a newbie at tapeout. So is it going to be much less shift if the layout is with DFM? How much is it going to be generally?
 

The DFM rules may result in more layout bloat and crosstalk
/ loading (from the density fills) but there is another consideration
of a more "political" nature. That is, if you didn't "check the box"
you get to have a long discussion about why not and why it
"should" not matter, involving various peripheral parties who
generally add only delay and b!tching to the proceedings.
 

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