Patent ID: 6521927
Filing Date: 2003-02-18
Classification: H01L

Abstract:
A semiconductor device comprising:a switching transistor including a drain region and a source region which are comprised of an impurity-diffused region formed in the surface layer portion of a semiconductor substrate; a first insulation film formed above the semiconductor substrate containing the switching transistor; a lower electrode of a capacitor formed on the first insulation film above said switching transistor; a second insulation film formed of one of a silicon nitride film and a titanium oxide film and provided on the lower electrode, the second insulation film having a hole to define an exposed surface of the lower electrode; an inter-electrode insulation film of the capacitor composed of one of ferroelectric and high-permittivity dielectric and formed on the exposed surface of the lower electrode as well as an outside of the hole so that at least a side surface portion of the inter-electrode insulation film is formed on the second insulation film at the outside of the hole; an upper electrode of the capacitor formed on the second insulation film and the inter-electrode insulation film to cover the inter-electrode insulation film as well as the side surface portion of the inter-electrode insulation film; an electrode wiring which connects one of the drain region and the source region and one of the upper electrode and the lower electrode of the capacitor to each other; and a wiring formed above the semiconductor substrate and connected to the other one of the drain region and the source region.