Patent ID: 9269592
Filing Date: 2016-02-23
CPC Classification: H01L

Claim Text:
1. A method of manufacturing a semiconductor device, comprising: forming a transistor in a semiconductor substrate, the semiconductor substrate having a first main surface, wherein forming the transistor comprises: forming a ridge including a first ridge portion and a second ridge portion in the semiconductor substrate, the ridge extending along a first direction, forming a source region, a drain region, a channel region, a drain extension region and a gate electrode adjacent to the channel region, in the ridge, doping the channel region with dopants of a first conductivity type, doping the source region and the drain region with dopants of a second conductivity type, wherein forming the drain extension region comprises forming a core portion doped with the first conductivity type in the second ridge portion, forming the drain extension region further comprises forming a cover portion doped with the second conductivity type, the cover portion being formed so as to be adjacent to at least one or two sidewalls of the second ridge portion.