wafer process based on N-substrate

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okguy

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Hello,

Which foundry can deliver wafers based on a N-substrate :?: I.e with PWELL instead of standard NWELL ?
I am looking for a sub-micron process below or 0.35µm.

Thanks for your help,

OkGuy
 

This is pretty uncommon these days. I think I've seen
one such at Northrop Grumman (Linthicum, MD) and I
worked in one "back in the day" (it was abnormal then,
and obsolete now). Mainly interesting for radiation
tolerance (field leakage suppression is a freebie, on
N-type), but there are other approaches that are
good enough for most applications, to get that in
"standard" Psub flows.
 

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