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Ge and Si p-channel metal-oxide-semiconductor field-effect-transistors(p-MOSFETs) with hafnium silicon oxynitride(HfSiON) gate dielectric and tantalum nitride(TaN) metal gate are fabricated.Self-isolated ring-type transistor structures with two masks are employed.W/TaN metal stacks are used as gate electrode and shadow masks of source/drain implantation separately.Capacitance-voltage curve hysteresis of Ge metal-oxide-semiconductor(MOS) capacitors may be caused by charge trapping centres in GeOx(1 < x < 2).Effective hole mobilities of Ge and Si transistors are extracted by using a channel conductance method.The peak hole mobilities of Si and Ge transistors are 33.4 cm2/(V.s) and 81.0 cm2/(V.s),respectively.Ge transistor has a hole mobility 2.4 times higher than that of Si control sample.
Ge and Si p-channel metal-oxide-semiconductor field-effect-transistors (p-MOSFETs) with hafnium silicon oxynitride (HfSiON) gate dielectric and tantalum nitride (TaN) metal gate are fabricated. Self-isolated ring-type transistor structures with Two masks are employed. W / TaN metal stacks are used as gate electrode and shadow masks of source / drain implantation separately. Capacitance-voltage curve hysteresis of Ge metal-oxide-semiconductor (MOS) capacitors may be caused by charge trapping centers in GeOx (1
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