Patent ID: 7888740
Filing Date: 2011-02-15
Classification: H01L

Abstract:
1. A semiconductor device comprising: a first MIS transistor formed over a semiconductor substrate and including a first gate insulating film, a first gate electrode formed on the first gate insulating film and first source/drain regions formed in the semiconductor substrate; a second MIS transistor formed over the semiconductor substrate and including a second gate insulating film thicker than the first gate insulating film, a second gate electrode formed on the second gate insulating film, second source/drain regions formed in the semiconductor substrate and a ballast resistor formed in the semiconductor substrate and connected to one of the second source/drain regions; a salicide block insulating film formed over the ballast resistor with an insulating film thinner than the second gate insulating film interposed therebetween; and a silicide film formed on the first source/drain regions and on the second source/drain regions, wherein an impurity concentration of the ballast resistor is higher than an impurity concentration of LDD regions or extension regions of the second source/drain regions.