Patent ID: 9171845
Filing Date: 2015-10-27
Classification: H01L

Abstract:
1. A semiconductor device, comprising a first transistor, a second transistor, and a third transistor, each of which includes a fin portion protruding from a substrate, source and drain regions in respective end portions of the fin portion, and a channel forming region between the source and drain regions, wherein the source and drain regions of each of the first, second, and third transistors have the same conductivity type, the channel forming region of the second transistor comprises a homogeneously doped region, whose conductivity type is different from that of the channel forming region of the first transistor and is the same as those of the source and drain regions of the second transistor, and the channel forming region of the third transistor comprises: a first homogeneously doped region connected to the source region of the third transistor and having the same conductivity type as the source region of the second transistor; a second homogeneously doped region connected to the drain region of the third transistor and having the same conductivity type as the source region of the second transistor; and a heterogeneously doped region connecting the first homogeneously doped region to the second homogeneously doped region and having a different conductivity type from the source and drain regions of the second transistor.