Patent ID: 6765272
Filing Date: 2004-07-20
Classification: H01L,Y10S

Abstract:
A semiconductor device having:a gate electrode which is formed on a first conductive-type well set in a semiconductor substrate, with a gate insulating film lying therebetween; a Lightly Doped Drain- (LDD) structure in which, on either side of said gate electrode, there is formed a LDD region which is a second conductive-type dopant diffusion region with a low dopant concentration and a source/drain region which is a second conductive-type dopant diffusion region with a high dopant concentration; an interlayer insulating film to cover said gate electrode as well as said section of LDD structure; and contact sections which are formed by filling up openings made in said interlayer insulating film with a conductive metal; wherein: a contact section connecting to the source/drain regions on one side of the gate electrode and having a potential equal to a potential of said first conductive-type well is disposed so as to come into contact with the LDD region lying on said one side of the gate electrode; and a contact section connecting to the other side of the source/drain regions on the other side of the gate electrode and having a potential different from the potential of said first conductive-type well is disposed so as not to come into contact with the LDD region lying on said one side of the gate electrode.