When do we need Deep NWell in a BiCMOS process?

[yolande_yj]

I need to choose a process with or without deep nwell. The process has deep trench and I will use the BJT for LNA and mixer. Do we need the Deep NWell? Is deep nwell cost effective? Can I use the Deep NWell for the NPN? Which block needs deep nwell?

 

[ambreesh]

Deep nwell are basically used for isolation.
U could PM steer he would be great help on this

 

[yolande_yj]

Deep nwell are basically used for isolation.
U could PM steer he would be great help on this

Yes, I know this very well. My question is: can I use them for BJT isolation? If I already have deep trench, is it cost effective to have deep nwell?