Patent ID: 6921437

Claim:
A gas distribution apparatus, comprising: a member having an upper surface, a lower surface and a periphery surface; and a gas distribution network formed within said member for uniformly delivering a gas into a process region, said gas distribution network being formed of: an inlet passage extending upwardly through said upper surface for connecting to a gas source; a plurality of first passages converged at a junction and connected with said inlet passage at the junction, said first passages extend radially and outwardly from the junction to the periphery surface; a plurality of second passages connected with said plurality of first passages, said plurality of first and second passages are coplanar, said second passages are non-perpendicular to said first passage and extend outwardly from said first passages to the periphery surface; and a plurality of outlet passages connected with said plurality of second passages and extending downwardly through said lower surface for delivering the gas into the processing region.