Patent ID: 8999104
Filing Date: 2015-04-07
Classification: H01J

Abstract:
1. A plasma source comprising: a plurality of ring plasma chambers disposed on a processing chamber top opposite from a processing chamber, each one of the plurality of ring plasma chambers being having a ring shape oriented parallel to the processing chamber top, each one of the plurality of ring plasma chambers not passing through the processing chamber top, wherein each one of the plurality of plasma chambers includes corresponding plurality of plasma chamber outlets coupling each one of the plurality the plasma chambers to the process chamber, each one of the plurality of plasma chamber outlets passing through the process chamber top each one of the plurality of plasma chamber outlets including a plasma restriction sized to prevent plasma from passing from the plasma chamber to the processing chamber; a plurality of primary windings, wherein each one of the plurality of primary windings is wrapped around an exterior one of the plurality of the ring plasma chambers; and a plurality of ferrites disposed in a plurality of groups, wherein each one of the plurality of the ring plasma chamber passes through a respective one of the plurality of groups of the ferrites.