Patent ID: 6883733

Claim:
A showerhead apparatus for mixing a plurality of gases for deposition of a film using the mixed gases comprising: a chemical vapor deposition chamber showerhead emitting and mixing a first gas and a second gas; a faceplate of said showerhead; a tapered post of said showerhead having a tapered tip that tapers inward as said post extends into said faceplate, said tapered post having a central opening emitting said first gas from said tapered tip of said tapered post; and an annular opening of said showerhead positioned in direct contact with and circumferentially about said tapered post emitting said second gas, said annular opening traversing through said faceplate to directly and entirely surround said tapered post, wherein said first and second gases are emitted coaxially to each other so that said first and second gases immediately intermix upon release from said tapered tip of said post and said annular opening and simultaneously force away any unreacted first gas and gaseous mixtures from said tapered tip of said post and a surface of said faceplate.