Patent ID: 7129549

Claim:
A semiconductor integrated circuit device comprising: a first N-channel MOSFET and first P-channel MOSFET each having a gate insulator film with a first film thickness, and a second N-channel MOSFET and second P-channel MOSFET each having a gate insulator with a second film thickness less than said first film thickness, a polysilicon layer constituting a gate electrode of said second N-channel MOSFET being doped with an N-type impurity and a polysilicon layer constituting a gate electrode of said second P-channel MOSFET being doped with a P-type impurity, wherein gate electrodes of said first N-channel MOSFET and said first P-channel MOSFET are formed as one body and connected to each other, wherein said gate electrodes of said first N-channel MOSFET and said first P-channel MOSFET are doped with a same conductive type impurity.