Patent ID: 8648445
Filing Date: 2014-02-11
Classification: H01L

Abstract:
1. A metal-oxide-semiconductor device, comprising: a semiconductor layer of a first conductivity type; at least one transistor in the semiconductor layer; first and second source/drain regions of a second conductivity type formed in a given transistor in the semiconductor layer, the first and second source/drain regions being formed proximate an upper surface of the semiconductor layer and spaced apart relative to one another; and a gate of the given transistor formed above and electrically isolated from the semiconductor layer, the gate being disposed at least partially between the first and second source/drain regions; wherein at least a given one of the first and second source/drain regions of the given transistor is configured having an effective width that is substantially greater than a width of a junction between the semiconductor layer and the given source/drain region; wherein at least the given source/drain region of the given transistor comprises a plurality of trenches formed within the given transistor in the semiconductor layer proximate the upper surface of the semiconductor layer; and wherein each of at least a subset of the trenches comprise sloped sidewalls and a bottom wall comprising material of the second conductivity type, the sidewalls being sloped such that the bottom walls of the subset of trenches are wider than respective upper openings of the subset of trenches.