Patent ID: 7017514

Claim:
An apparatus for managing plasma in wafer processing operations, comprising: a housing having an fluid entry port and a fluid exit port, the housing having an internal region defined by a top horizontal wall, a bottom horizontal wall and a circular side wall; a plurality of baffle plates, each one of the plurality of baffle plates define a level in a multilevel structure formed in the internal region within the housing, each baffle plate being either separated from one another, or separated from either the top horizontal wall or the bottom horizontal wall by a separation spacing, each of the plurality of baffle plates including, a plurality of holes, the plurality of holes in each of the baffle plates being oriented so that holes defined in each of the plurality of baffle plates are misaligned, thus defining a nonlinear path for fluids designed to enter the entry port, traverse each level of the multilevel structure defined by the plurality of baffle plates, the fluids capable of mixing together at each level of the multilevel structure, and leave the exit port of the housing; and a gas inlet port in at least one of the separating spacing, the gas inlet port configured to inject gas into the housing in at least one of the separation spacing.