MOSFET operation

1. MOSFET operation

2. Animation of the MOSFET manufacturing processI encourage you to look at the website given below and use the button “animate to next” – the actual process is described for each step. http://jas.eng.buffalo.edu/education/fab/NMOS/nmos.html

3. Basic structure of the MOSFET

4. Basic idea of the MOSFET - -

5. V G MOS capacitor p type semiconductorvoltage bias effects –battery switched + + + + E - + - + - + - +

6. V G MOSFET p type semiconductor gate voltage VG > VT Electrons can flow from the source to the drain

7. L is not between the metal electrodes

9. V G NMOS -- p type semiconductor -- gate voltage VG variable - circuit models Enhancement mode Depletion mode n channel

10. V G PMOS -- n type semiconductor -- gate voltage VG variable - circuit models Enhancement mode Depletion mode p channel

11. NMOS & PMOS NMOS – n channel in a p-type semiconductor PMOS – p channel in an n-type semiconductor - +

12. V G NMOS -- p type semiconductor -- gate voltage VGS < VT -

13. V G NMOS -- p type semiconductor -- gate voltage VGS > VT - -

14. V G Derivation of the conductance

15. V G NMOS -- p type semiconductor -- gate voltage VGS > VT – long channel

16. V G NMOS -- p type semiconductor – VGS > VT & changing VDS

17. Typical characteristics

18. Biasing effects N channel MOSFEThttp://www.mtmi.vu.lt/pfk/funkc_dariniai/transistor/mosfet.htm

21. Simple three-dimensional unit cell