Patent ID: 6333535
Filing Date: 2001-12-25
Classification: H01L

Abstract:
A semiconductor device comprising:a first contact hole formed through a first part of an interlayer insulating film formed on a silicon substrate, to reach a first semiconductor layer of a first conductivity type in a surface of said silicon substrate;a first buried layer buried in said first contact hole so as to directly contact with said first semiconductor layer and composed of polysilicon containing an impurity of the first conductivity type;a first multi-layer wiring layer formed On said first buried layer connected to said first semiconductor layer through said first buried layer,a second contact hole formed through a second part of said interlayer insulating film to reach a second semiconductor layer of a second conductivity type in the surface of said silicon substrate;a second buried layer buried in said second contact hole so as to directly contact with said second semiconductor layer and composed of polysilicon containing an impurity of the second conductivity type; anda second multi-layer wiring layer formed on said second buried layer and electrically connected to said second semiconductor layer through said second buried layer;wherein said first and second multi-layer wiring layers at least comprise a barrier metal layer formed on said interlayer insulating film and a polysilicon layer formed on said barrier metal layer and composed of polysilicon containing an impurity of the first conductivity type, andsaid first buried layer is directly connected to said polysilicon layer penetrating said barrier metal layer.