Patent ID: 8865549
Filing Date: 2014-10-21
Classification: H01L

Abstract:
1. A metal-oxide-semiconductor field-effect transistor, formed at a surface of single-crystal silicon, the surface having a first conductivity type, comprising: source and drain regions of a second conductivity type formed at locations of the surface separated from one another by a recess in the single-crystal silicon; first and second dielectric structures disposed over the source and drain regions, respectively, each of the first and second dielectric structures having portions disposed over portions of the recess; a gate dielectric layer disposed at a surface of the recess and extending under portions of the first and second dielectric structures and up vertical edges of the first and second dielectric structures over the recess; a gate electrode disposed within the recess and separated from the surface by the gate dielectric layer, the gate electrode having portions extending under portions of the first and second dielectric structures.