Patent ID: 6864549

Claim:
A semiconductor integrated circuit device comprising: a first MISFET for a logic circuit having a first gate insulating film and a first gate electrode formed on said first gate insulating film; a second MISFET having a second gate insulating film which has a thickness larger than that of said first gate insulating film; a third MISFET for a memory cell having a third gate insulating film which has a thickness larger than that of said first gate insulating film; and a first capacitive element having a fourth gate insulating film which has a thickness larger than that of said first gate insulating film and a fourth gate electrode formed on said fourth gate insulating film, wherein said fourth gate insulating film is formed on a semiconductor region formed in a semiconductor substrate such that said semiconductor region serves as one of two electrodes of said first capacitive element and said fourth gate electrode of said first capacitive element serves as the other of said two electrodes of said first capacitive element, wherein said second MISFET operates at a first voltage, wherein said first MISFET operates at a voltage lower than said first voltage, and wherein said first capacitive element operates at a voltage lower than said first voltage.