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RC extraction issue when there is a shared substrate or well

Question asked by andrewng on Dec 21, 2010
Latest reply on Jan 4, 2011 by karen_chow

Dear All,


Is there any experience that RC extraction show an abnormal result when two transistors shared the same substrate or well?


The port is in the most left hand side and two transistor are placed at below picture:


RC extration.JPG


I expected the R for for VDD to T1 should be smaller than VDD to T2.

However, both R are just a little bit different only.

So I think that there may be some problem which caused by share the well.

Is there any bothers could help?