Patent ID: 8035193

Claim:
A method of fabricating a capacitor through a sequential formation of a bottom electrode, a dielectric layer and a top electrode over a substrate, the method comprising: forming a Ru X Ti Y O Z film during a formation of at least one of the bottom electrode and top electrode, where x, y and z are positive real numbers, wherein the forming of the Ru X Ti Y O Z film comprises: forming a Ru—O film via atomic layer deposition (ALD); and forming a Ti film via ALD, wherein the forming of the Ru—O film and the forming of the Ti film are performed alternately at least one time, wherein the forming of the Ru—O film comprises: injecting a Ru source and a reactive gas into a reaction chamber; performing a primary purge by injecting a purge gas and the reactive gas into the reaction chamber; injecting the reactive gas into the reaction chamber; and performing a secondary purge by injecting the purge gas and the reaction gas into the reaction chamber, wherein the injecting of the Ru source through the secondary purge are performed as one cycle at least one time.