Patent ID: 7936024
Filing Date: 2011-05-03
Classification: H01L,Y10S

Abstract:
1. A semiconductor device comprising: a semiconductor substrate; an etch stop layer on the semiconductor substrate; a first interlayer insulating layer on the etch stop layer, wherein the first interlayer insulating layer and the etch stop layer comprise different materials; an insulating plug extending through the first interlayer insulating layer and the etch stop layer; a single crystal semiconductor layer on the first interlayer insulating layer and on the insulating plug; a second interlayer insulating layer on the single crystal semiconductor layer; and a common contact plug extending through the second interlayer insulating layer, through the single crystal semiconductor layer, through the first interlayer insulating layer and through the etch stop layer to the semiconductor substrate; wherein the insulating plug and the common contact plug are spaced apart.