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Compressively strained Si1-xGex band-to-band tunneling field effect transistors with planar structure and HfO2/TiN gate stack have been produced and analyzed, with different Germanium concentrations of x = 0.35, 0.50 and 0.65. Simulations using a nonlocal band-to-band-tunneling model have been carried out to understand the switching behavior and its dependence on the material parameters. One would...
P-MOSFETs with HfO2 gate dielectric and TiN metal gate were fabricated on compressively strained SiGe layers with a Ge content of 50 at.% and electrically characterized. The devices showed good output and transfer characteristics. The hole mobility, extracted by a split C-V technique, presents a value of ~200 cm2/V·s in the strong inversion regime.
Integration of lanthanum lutetium oxide (LaLuO3) with a κ value of 30 is demonstrated on high mobility biaxially tensile strained Si (sSi) and compressively strained SiGe for fully depleted n/p-MOSFETs as a gate dielectric. N-MOSFETs on sSi fabricated with a full replacement gate process indicated very good electrical performance with steep subthreshold slopes of ~72 mV/dec and Ion/Ioff ratios up...
The implementation of more powerful materials into leading edge CMOS devices allows performance improvements without scaling and without changing the circuit design libraries. This highly motivates the research on novel materials. In this paper we present various transistor fabrication processes like “gate first” and “replacement gate” for different channel stack configurations like strained Si, strained...
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