Patent ID: 6445047
Filing Date: 2002-09-03
Classification: H01L

Abstract:
A semiconductor device comprising:a first-surface-channel-type MOSFET with a first threshold voltage; and a second-surface-channel-type MOSFET with a second threshold voltage having an absolute value greater than an absolute value of said first threshold voltage, wherein the first-surface-channel-type MOSFET includes: a first gate insulating film formed on a semiconductor substrate; and a first gate electrode, which has been formed out of a poly-silicon film formed directly on the first gate insulating film, and wherein the second-surface-channel-type MOSFET includes: a second gate insulating film formed on the semiconductor substrate; and a second gate electrode, which has been formed out of a refractory metal film formed directly on the second gate insulating film, the refractory metal film being made of a refractory metal or a compound thereof.