Patent ID: 6855594

Claim:
A method of forming a capacitor, comprising: forming a conductive metal nitride comprising first electrode layer over a substrate, the conductive metal nitride being oxidizable to a higher degree at and above an oxidation temperature of 300° C. as compared to any degree of oxidation below the oxidation temperature of 300° C.; feeding at least one oxygen containing vapor precursor to the conductive metal nitride comprising first electrode layer below the 300° C. oxidation temperature under conditions effective to form a first portion oxide material comprising aluminum oxide of a first density of a capacitor dielectric region over the conductive metal nitride comprising first electrode layer; feeding at least one oxygen containing vapor precursor over the first portion at a temperature above the 300° C. oxidation temperature effective to form a second portion oxide material comprising aluminum oxide of a second density of the capacitor dielectric region over the first portion, the oxide comprising material of the first portion and the oxide material of the second portion being common in chemical composition and the second density being greater than the first density; and forming a conductive second electrode layer over the second portion oxide material of the capacitor dielectric region.