Patent ID: 6843882
Filing Date: 2005-01-18
Classification: C23C,H01L

Abstract:
1. A system for processing substrates, comprising: a plurality of process chambers, each process chamber including an inlet gas distribution member connected to an inlet gas line to distribute gas from the inlet gas line into the process chamber, a substrate support to support a substrate at a spacing distance from the inlet gas distribution member, and a gas outlet, the inlet gas distribution member having an inlet gas distribution member impedance to a gas flow through the inlet gas distribution member into the process chamber, the plurality of process chambers being substantially identical; a source gas delivery line connected to the inlet gas lines of the plurality of process chambers to supply a gas flow to be divided into the inlet gas lines; and a plurality of tunable upstream gas restrictors each disposed in one of the inlet gas lines connected to the inlet gas distribution members of the process chambers and being configured to adjust a flow rate into the corresponding process chamber, each upstream gas restrictor being tunable to adjust a tunable upstream gas restrictor impedance to achieve substantially identical process results in the plurality of chambers.