Patent ID: 6956261

Claim:
A semiconductor device, comprising on the same semiconductor substrate: a first DRAM section including a first memory cell having a first capacitive element having a first capacitance; and a second DRAM section including a second memory cell having a second capacitive element having a second capacitance larger than the first capacitance, wherein the first capacitive element includes: a first capacitor lower electrode composed of a first diffusion layer formed in the semiconductor substrate; a first capacitor insulating film formed on the first capacitor lower electrode; and a first capacitor upper electrode formed on the first capacitor insulating film, the second capacitive element includes: a second capacitor lower electrode composed of a conductive film formed on an insulating film provided on the semiconductor substrate; a second capacitor insulating film formed on the second capacitor lower electrode; and a second capacitor upper electrode formed on the second capacitor insulating film, and an operating voltage of the first DRAM section is higher than an operating voltage of the second DRAM section.