CMOS help

Discussion in 'Homework Help' started by oceanbear, Oct 26, 2010.

  1. oceanbear

    Thread Starter New Member

    Oct 26, 2010
    1
    0
    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.
     
  2. guitarguy12387

    Active Member

    Apr 10, 2008
    359
    12
    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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