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3.3.4 PMOS Transistor
The PMOS transistors were derived from the NMOS transistors by exchanging
ND with NA. As the hole mobility is about 1/3 lower compared to the
electron mobility the carrier temperatures do not rise to such high levels as
compared to the NMOS. Hence, non-local effects do not play such an important
role. This is confirmed by the simulated output characteristics which are
shown in Fig. 3.17 and Fig. 3.18 for both devices.
As for the homogeneously p-doped semiconductor both devices were simulated
using (3.41) with
= 1 in combination with
(3.50). As can be seen in Fig. 3.17 and
Fig. 3.18, the error is again intolerably large.
Tibor Grasser
1999-05-31