Patent ID: 6483158
Filing Date: 2002-11-19
Classification: H01L

Abstract:
A semiconductor device, comprising:a substrate with a top surface that extends in a first direction; a gate oxide film formed on the top surface of the substrate; a gate electrode formed on the gate oxide film; an insulating sidewall spacer formed at each sidewall of the gate electrode; a recess formed in the substrate on each side of the gate electrode; a lightly doped impurity layer formed in the substrate below each insulating sidewall spacer and adjacent to a top edge of each recess; an oxide spacer formed in each recess only at a bottom inside corner of each recess, wherein each oxide spacer does not extend to an upper surface of its respective recess and wherein each oxide spacer only partially overlaps the impurity layer located at the top edge of its respective recess along a second direction, which is perpendicular to the first direction; and a conductive material formed in each recess to form a source or a drain.