Patent ID: 7102954
Filing Date: 2006-09-05
Classification: G11C,H01L

Abstract:
1. A semiconductor integrated circuit device, comprising: a logic circuit including a logic transistor formed of an insulted gate type field effect transistor as a component thereof and executing a prescribed processing; and memory circuitry for storing at least data to be used by said logic circuit, said memory circuitry including a first circuit configured for receiving first and second voltages a difference of which provides a first amplitude and a second circuit configured for receiving third and fourth voltages a difference of which provides a second amplitude, the second amplitude being greater than the first amplitude, said first circuit including as a component thereof a first-type insulated gate field effect transistor having a first gate insulting film of a single-gate structure different from a stacked gate structure having two electrodes stacked with an insulating film placed in between, said second circuit including as a component thereof a second-type insulated gate field effect transistor having a second gate insulating film of the single-gate structure, the second gate insulating film being thicker than the first gate insulating film, said logic transistor having a gate insulating film with a thickness of the first gate insulating film.