What is a difference between PWELL and PSUB?

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gafsos

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Hello

What is a difference between PWELL and PSUB ???
 

PWELL Vs Psub

PSUB is a P type Subtrate and is commonly used substrate in silicon wafer base, also it will use less well to isolate different types of devices in the silicon wafer base.
Only N-WELL is used in this process...except if the process used a Deep NWELL then a PWELL is created to isolate n-type mos devices.


P-WELL is a type of Well to isolate normally an n-type mos devices commonly used in an N type Substrate Silicon wafer base. In case of an N type Substrate Silicon wafer base double wells are normally used...an NWELL and PWELL.

Hope this help.
 

    gafsos

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PWELL Vs Psub

There sure are diff between Pwell and Psub
But if you just has twin-well tech, to the point view of layout, pWell is Psub, for no pwell need to be drawn
 

    gafsos

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Re: PWELL Vs Psub

gafsos said:
Hello

What is a difference between PWELL and PSUB ???
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Pwell and Psub are different regions in layout. Typically, Pwell doping concentration is higher than Psub.
 

Re: PWELL Vs Psub


Yeah, psub has a higher doping level than pwell. additionally, pwell is used in triple well process in which it is located within deep N-well.
 

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