Experimental silicon trench MOSFET structures were fabricated and used to estimate electron mobilities in MOS channels formed along [110] trench sidewalls. A channel electron mobility approaching 87% of its bulk value can be obtained. These results were derived from a novel trench fabrication process, measured MOSFET drain current-voltage characteristics and accurate two-dimensional device simulations of MOSFET transfer characteristics.
Published in:
Electronics Letters
(Volume:27
,
Issue:
9
)
Date of Publication: 25 April 1991