Width of FINFET

[MOHAMMAD ALEEM]

how to change the width of FINFET . I have designed an FINFET based differential amplifier using gm id technique and if i am using minimum fin number which is 1 then also my channel length goes in um range. Is there anyway to quantize the channel width

 

[dick_freebird]

No, only the finger count.

 

[MOHAMMAD ALEEM]

No, only the finger count.

If you know can Double gate mosfet solve this problem?

 

[timof]

It's the fin count that determines the effective gate "width" in FinFETs.

The number of fins is your quantization in FinFETs.

The width of on fin (in the top view of the layout) is fixed, and the channel width corresponds (loosely speaking) to the height of the fin (this information is abstracted, hidden from the designers and layout engineers).

 

[MOHAMMAD ALEEM]

It's the fin count that determines the effective gate "width" in FinFETs.

The number of fins is your quantization in FinFETs.

The width of on fin (in the top view of the layout) is fixed, and the channel width corresponds (loosely speaking) to the height of the fin (this information is abstracted, hidden from the designers and layout engineers).

what if we want to decrease the width as number of fin cannot be reduced below 1 and also nfin must be integer

 

[timof]

This is impossible.
Fin structure - height, width, taper, etc. - is fixed, for a given technology.

 

[MOHAMMAD ALEEM]

This is impossible.
Fin structure - height, width, taper, etc. - is fixed, for a given technology.

using DGMOSFET is it possible to reduce the width after tieing both gate terminal

 

[timof]

I am talking about real FinFETs used in real semiconductor technologies, that cost billions and billions of dollars to develop.

In FinFETs in papers and in tehjoretical researchm you can do anything - change fin width, height, etc.

 

[MOHAMMAD ALEEM]

I am talking about real FinFETs used in real semiconductor technologies, that cost billions and billions of dollars to develop.

In FinFETs in papers and in tehjoretical researchm you can do anything - change fin width, height, etc.

can you elaborate more how to write code in hspice for FINFET..as i am unable to change the width ...

M1 D S G1 G2 B pfet w=15u l=12n nfin =1
is this fine?

 

[timof]

At this level, I think - W parameter can be specified, but will be ignored by SPICE simulator.
You need to use proper SPICE models for FinFETs, e.g.:

https://www.powerelectronicsnews.com/si2-compact-model-coalition-releases-bsim-cmg-finfet-spice-model/