Patent ID: 9208998
Filing Date: 2015-12-08
Classification: H01J,H01L

Abstract:
1. A plasma processing chamber having at least two processing regions to enable individual or simultaneous processing of one or two wafers, comprising: a chamber body defining at least two plasma processing regions by a partition wall separating each of the two plasma processing regions, wherein the partition wall comprises a pressure equalizing channel, each plasma processing region having a cathode situated at a lower part thereof and an anode situated in a ceiling thereof, said chamber body further defining an evacuation path; at least one vacuum pump coupled to the evacuation path; at least two RF supplies, each of the two RF supplies simultaneously coupling at least a first RF frequency and a second RF frequency to one of the cathodes; and, two movable dielectric isolation rings, each provided at one processing region and being vertically movable between a loading/unloading position and a processing position, each isolation ring defining peripheral boundary of each processing region when the isolation ring assumes its processing position, wherein each isolation ring has a thickness, T, such that it prevents return path from the plasma via the chamber body, whereby the RF return path is controlled to flow via the anode.