What is Deep NWel and where is it used ?

[vbhupendra]

Deep NWel

What is deep Nwel and where it is used ?

 

[bigpop]

Re: Deep NWel

deep Nwell is used for substrate guard. If you want to get a clean substrate
in chip, you can use it to separate from the noise substrate.

 

[sunny153]

Re: Deep NWel

Deep N-well or buried N-well is a nwell layer implanted deeper down in the substrate than the normal N-well. It is mainly to control the substrate leakage of N-mos and to provide the better isolation.

These processes mainly used for high frequency (RF) circuits.

 

[vbhupendra]

Re: Deep NWel

How in the Layout we define deep Nwel. I mean is there any dummy layer for defining a wel as deep nwel.

 

[dream_taker]

Re: Deep NWel

You have seperate Layer called Deep Nwell which will be laid and surrounding will be Nwell. Layout for Deep Nwell have specific design rules which fab gives.

 

[Y.C Park]

Re: Deep NWel

You should carefully use the Deep NWell process.

if you use CMOS technology , NMOS & PMOS Transistor on Deep Nwell are a little bit different than Normal P&NMOS On only P-substrate.
You shoud check out a difference.
Thanks!!!

 

[yibinhsieh]

Re: Deep NWel

Deep Nwell process is for RF purpose and needs extra mask and charge.

But it offers better noise performance and the cascode device will not have body effect.

Yibin.