Top contacts for vertical double-gate MOSFETs
As scaling of electronic devices goes on, the issue of short channel effects draws growing attention. Double-gate MOSFETs are known to reduce short channel behaviour effectively [Proc. IEEE 85 (1997) 486] and therefore have gained increasing attention for future CMOS application. Here a vertical layout is discussed, where the current flow is perpendicular to the surface. In an already realised layout [Proc. ESSDERC (2001) 191] the device performance is ruled by the resistance of the top contact. In a revised layout the top contact is implemented directly on top of the transistor. Here the layout and the technology steps to obtain this structure are discussed.
double-gate mosfet vertical mosfet silicon devices nanotechnology cmp