Patent ID: 7407818

Claim:
A method for manufacturing a semiconductor device, comprising the steps of: preparing a semiconductor substrate; forming a lower electrode which is a laminate comprised of a layer of Ir and a layer of IrO 2 over the semiconductor substrate; forming a capacitor insulating film comprised of a metal oxide dielectric on the lower electrode; and forming an upper electrode comprised of a precious metal film on the capacitor insulating film, wherein the Ir film and the IrO 2 film have a combined thickness of 100 nm or less so that leakage current of the semiconductor device is reduced, and wherein the laminate comprising the lower electrode further comprises a hydrogen diffusion barrier film provided proximate to the semiconductor layer and under a lower surface of-the layer of Ir, and a conductive film comprised of a precious metal provided on the layer of IrO 2 in contact with the capacitor insulating film which functions to reduce Ir diffusion.