Patent ID: 7030446
Filing Date: 2006-04-18
Classification: H01L

Abstract:
1. A switching device comprising: a first device having a conducting path coupled between a first supply voltage and a common output, said path having a conductive and a non-conductive state; a second device having a conducting path coupled between a second supply voltage and said common output, said path having a conductive and a non-conductive state; and a common input to control said first and second devices; wherein said conducting paths of first and second devices comprises a very-thin semiconductor film having a thickness t wherein said conducting paths of first and second devices each comprises a hub region, a dielectric layer above the hub region, and a gate region above the dielectric layer, said gate region coupled to said common input; and wherein each of said hub regions is designed to contain the entire surface accumulation layer within said film thickness t wherein each of said hub regions is designed to be fully depleted of majority carriers from the entire film thickness t P1 to eliminate leakage during the non-conductive state by satisfying the condition: where, X and Y are thickness parameters in Angstroms defined by X=q 2 /(2*kT*ε s ), Y=q/(2*ε S *V FB ), q is the electron charge, kT/q is the thermal voltage, ε s and ε G are the permittivities of the hub and dielectric materials, D is the doping in each hub region in Atoms/Angstroms 3 , and V FB is the flat-band voltage between the gate material and the hub material which equals work function difference Φ MS in the absence of fixed charge.