error on bad component subtype deep n-well NMOS

[allennlowaton]

Good day friends,

I would like to ask help regarding this error from the layout.
I using TSMC 0.18um 1P6M process.
My design requires an NMOS with a shorted source and bulk.

Thank you.

 

[Avien]

Good day friends,

I would like to ask help regarding this error from the layout.
I using TSMC 0.18um 1P6M process.
My design requires an NMOS with a shorted source and bulk.

Thank you

I also have this error.
The type or subtype of the device is not recognized.

I did try to match extracted device with the netlist file.
and it works for me!

Cheers!

 

[dick_freebird]

If you put NMOS in a DNW/VNW pocket then its body is cut
off from the bulk / handle Psub and you will have to route the
body (tap) explicitly to open field and a ptap there.

What value do you imagine putting it in a DNW pocket is,
when you intend to jumper it to the substrate in the end?
You eat a lot of layout area for nothing (except perhaps
substrate noise control).

 

[allennlowaton]

If you put NMOS in a DNW/VNW pocket then its body is cut
off from the bulk / handle Psub and you will have to route the
body (tap) explicitly to open field and a ptap there.

What value do you imagine putting it in a DNW pocket is,
when you intend to jumper it to the substrate in the end?
You eat a lot of layout area for nothing (except perhaps
substrate noise control).

Thank you for the feedback.
My application requires the shorted source and bulk NMOS that will avoid the body effect.

 

[dick_freebird]

So then you do not want source tied to "bulk" (which is the
handle Psub / Pepi) but the local body "pocket" (Pepi inside
DNW/VNW). That may want you to use a 4T FET symbol and
wire it explicitly; the 3T may have an inherited sub! connection
that you either can't modify or can't find?

P- inside DNW is not the same "node" as sub!.