Patent ID: 6166425
Filing Date: 2000-12-26
Classification: H01L

Abstract:
A semiconductor device, comprising:a N-channel MOS transistor formed on the surface of a first P-well formed on the surface of a P-type silicon substrate;a P-channel MOS transistor formed on the surface of a N-well formed on the surface of said P-type silicon substrate; anda resistance element formed on the surface of a second P-well formed on the surface of said P-type silicon substrate while having a depth deeper than that of said first P-well;wherein said N-channel MOS transistor and said P-channel MOS transistor have a gate electrode composed of a first N.sup.+ -type polysilicon film and a metal silicide film to be laminated thereon, the top surface of said gate electrode being covered with an insulating film cap of a first insulating film and the side of said gate electrode being covered with an insulating film spacer of a second insulating film;said semiconductor device further comprises a plurality of N.sup.+ -type polysilicon film patterns that are composed of said first N.sup.+ -type polysilicon film and are formed in parallel at predetermined intervals on said second P-well while directly connecting to the surface of said second P-well, a groove with a predetermined depth formed self-alignedly to said N.sup.+ -type polysilicon film patterns on said second P-well, and a N.sup.+ -type diffusion layer is formed on the surface of said second P-well to form the surface of said groove as well as the surface of said P-well to be directly connected to said N.sup.+ -type polysilicon film patterns;the surface of said N.sup.+ -type polysilicon film patterns including said groove is covered with a third insulating film with a predetermined thickness; andsaid resistance element composed of a second N.sup.+ -type polysilicon film is formed reciprocative-crossing several times in the orthogonal direction to said N.sup.+ -type polysilicon film patterns through said third insulating film on said N.sup.+ -type polysilicon film patterns.