Patent ID: 7141848

Claim:
A semiconductor device having a non-volatile memory transistor, comprising: a first capacitor element and a second capacitor element, the non-volatile memory transistor, the first and the second capacitor element being formed in one semiconductor substrate, the first capacitor element including a first lower electrode, a first dielectric film and a first upper electrode, the second capacitor element having a second lower electrode, a second dielectric film and a second upper electrode, and the second dielectric film having a film thickness that is different from a film thickness of the first dielectric film, wherein the first dielectric film has a structure including a thermal oxidation film, a nitride film and an oxide film successively laid in a direction from the first lower electrode toward the first upper electrode, and wherein the second dielectric film has a structure including a first thermal oxide film, a CVD oxide film, a second thermal oxide film, a nitride film and an oxide film successively laid in a direction from the second lower electrode toward the second upper electrode.