QuantumATK Forum

QuantumATK => General Questions and Answers => Topic started by: kanna on January 19, 2016, 15:46

Title: calculation of gate oxide capacitance
Post by: kanna on January 19, 2016, 15:46

Can we calculate the gate oxide capacitance of a mosfet with the tutorial given in
http://quantumwise.com/publications/tutorials/item/511-calculation-of-atomic-scale-capacitance (http://quantumwise.com/publications/tutorials/item/511-calculation-of-atomic-scale-capacitance) ?

Title: Re: calculation of gate oxide capacitance
Post by: Anders Blom on January 21, 2016, 10:21

Not really. For a moscap you rather need to set up a device structure and look at the charge transfer under finite bias.

Title: Re: calculation of gate oxide capacitance
Post by: kanna on January 21, 2016, 10:46

Hi,
I want to calculate gate-source capacitance for a given gate bias. I understand the part about setting up a device structure, but how do I get the charge transfer ?

Thanks
kanna

Title: Re: calculation of gate oxide capacitance
Post by: Anders Blom on January 21, 2016, 11:03

I suppose you are mainly looking at how the electron density changes with bias, so you can just subtract the zero-bias electron density and that's your bias-induced charge transfer.

Title: Re: calculation of gate oxide capacitance
Post by: techenthusiast on October 8, 2025, 06:26

Quote from: Anders Blom on January 21, 2016, 11:03

I suppose you are mainly looking at how the electron density changes with bias, so you can just subtract the zero-bias electron density and that's your bias-induced charge transfer.

Dear experts,

Good afternoon, how to compute cgg, cgd, cgs  of a fet using quantum atk?