Patent ID: 6933190

Claim:
A method of manufacturing a semiconductor device, comprising the steps of: (a) forming a rare metal layer above a semiconductor substrate formed with semiconductor elements and a lower electrode and an oxide dielectric film of a capacitor; (b) forming a metal nitride layer in direct contact with the rare metal layer without using hydrogen-containing gas; (c) forming an insulating mask layer on the metal nitride layer; (d) patterning the insulating mask layer by using a resist pattern; (e) removing the resist pattern used in said step (d); (f) patterning the metal nitride layer by using the patterned insulating mask layer; (g) patterning the rare metal layer by using the patterned insulating mask layer and the patterned metal nitride layer, to constitute an upper electrode of the capacitor; and (h) forming an insulating film over the semiconductor substrate to cover the patterned insulating mask layer, the insulating film being a TEOS based SiO layer, wherein said step (d) is terminated before the rare metal layer is exposed.