Patent ID: 7329574

Claim:
A method of forming a Metal-Insulator-Metal (MIM) type capacitor comprising: forming an insulation layer on a substrate; patterning the insulation layer to form a recess therein; forming a metal-nitride layer on the first insulation layer and in the recess; forming a sacrificial layer on the metal-nitride layer; planarizing the sacrificial layer until the metal-nitride layer is exposed to provide a planarized sacrificial and metal-nitride layer; and plasma etching the metal-nitride layer included in the planarized sacrificial and metal-nitride layer using an etch gas comprising carbon-fluorine and oxygen to recess an upper surface of the metal-nitride layer to a level below an adjacent upper surface of the planarized sacrificial and metal-nitride layer to form a MIM capacitor electrode wherein etching further comprises providing the carbon-fluorine in a ratio to the oxygen less than about 1 to 1.