Gf. Niu et G. Ruan, THRESHOLD VOLTAGE AND INVERSION CHARGE MODELING OF GRADED SIGE-CHANNEL MODULATION-DOPED P-MOSFETS, I.E.E.E. transactions on electron devices, 42(12), 1995, pp. 2242-2246
Analytical models of threshold voltage and inversion charge for the gr
aded SiGe-channel modulation-doped p-MOSFET's have been derived and ve
rified by SEDAN-3 simulation. The effect of threshold voltage adjustme
nt on hole confinement, and the increase of SiGe channel hole density
under the threshold voltage specified by application circuits are then
studied.