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Insulator<br />
(SiO 2 )<br />
+<br />
+<br />
Source<br />
+<br />
-<br />
P +<br />
N: e - , e.g. As<br />
(Donor)<br />
-<br />
Semiconductor Devices – MOSFET<br />
Metal Oxide Semiconductor Field Effect Transistor<br />
+<br />
+<br />
+<br />
-<br />
-<br />
-<br />
0V G<br />
Gate<br />
(Me)<br />
Channel<br />
-<br />
N<br />
Doping:<br />
-<br />
-<br />
-<br />
+<br />
+<br />
+<br />
+<br />
+<br />
Si<br />
Spacer<br />
P: holes, e.g. B<br />
(Acceptor)<br />
-<br />
+<br />
Drain<br />
+ +<br />
+ P +<br />
+<br />
-<br />
– V D<br />
Source<br />
+ P +<br />
Computational Materials Science and Engineering<br />
+<br />
+<br />
+<br />
+ +<br />
-<br />
Gate<br />
N<br />
+<br />
Drain<br />
+ +<br />
+ P<br />
+<br />
+ + +<br />
+<br />
+<br />
+<br />
+<br />
+<br />
+<br />
-<br />
- -<br />
+<br />
+<br />
+ +<br />
+<br />
+<br />
+ +<br />
-<br />
-<br />
- -<br />
-<br />
-<br />
– V G<br />
I D<br />
-<br />
Si<br />
– V D<br />
• Analog: Amplification<br />
• Digital: Logic gates<br />
-