Patent ID: 7402210

Claim:
An apparatus for performing an atomic layer deposition process, comprising: a chamber body comprising a substrate support; a lid assembly attached to the chamber body; a first gas delivery sub-assembly coupled to the lid assembly and configured to deliver a first process gas, comprising: a centralized expanding conduit extending through the lid assembly and expanding radially outward to substantially cover a substrate disposed on the substrate support; an annular pre-mixing channel encircling and in fluid communication with the centralized expanding conduit, wherein the annular pre-mixing channel is adapted to deliver the first process gas through a plurality of passageways and nozzles and into the centralized expanding conduit; and a first gas inlet and a second gas inlet coupled to the annular pre-mixing channel and positioned to provide the first process gas to the annular pre-mixing channel; and a second gas delivery sub-assembly coupled to the lid assembly and configured to deliver a second process gas into the centralized expanding conduit, wherein the second gas delivery sub-assembly comprises a gas inlet in fluid communication to the centralized expanding conduit.