Patent ID: 8269282
Filing Date: 2012-09-18
Classification: H01L

Abstract:
1. A semiconductor component, comprising: at least one field effect transistor disposed along a trench extending vertically downward from a horizontal top surface in a semiconductor region, the at least one field effect transistor having a source region of a first conductivity type along the trench and extending downward from the horizontal top surface, a drain region of the first conductivity type, and a body region of a second conductivity type disposed between the source region and the drain region in the semiconductor region so as to form a first generally horizontal junction between the source region and the body region and a second generally horizontal junction between the body region and the drain region, the first and second generally horizontal junctions having a first vertical depth and a second vertical depth, respectively, relative to the horizontal top surface; a gate electrode in the trench along the body region, said gate electrode being arranged in a manner isolated from the body region by a gate dielectric and extending vertically from an uppermost surface of the gate electrode, at a third vertical depth relative to the horizontal top surface, to a lower-most surface of the gate electrode, at a fourth vertical depth relative to the horizontal top surface, such that either the third vertical depth is greater than the first vertical depth or the fourth vertical depth is less than the second vertical, or both; and a first locally delimited dopant region of the first conductivity type in the semiconductor region, the first locally delimited dopant region extending either downward from the first generally horizontal junction between the source region and the body region to below the third vertical depth, or extending upward from the second generally horizontal junction between the drain region and the body region to above the fourth depth, so that a part of the first dopant region extends vertically in the body region to bridge a gap in the body region between the first vertical depth and the third vertical depth or a gap in the body region between the second vertical depth and the fourth vertical depth.