CMOS help

Thread Starter

oceanbear

Joined Oct 26, 2010
1
What are substrate and well contacts bulk CMOS and why are they important?

I can't explain well contacts and why are they important. Somebody please help??

Thanks.
 
Substrate contact basically allows you to control the threshold voltage, IIRC. Google body effect.

The well contacts are just that... they allow you to make contact to the well. Otherwise it is buried.

I'm no VLSI guy though... maybe someone else can expand/debunk my memory haha!
 
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