PLASMA PROCESSING APPARATUS

摘要

The present invention relates to an apparatus (10) for plasma processing an article (12), the apparatus comprising: a chamber (14) for receiving an article to be processed; electrode means (16) for generating an electric field in said chamber for establishing a plasma in said chamber so that said article can be processed; generation means (24) for generating alternating electrical energy for transmission to said electrode means (18); connection means for connecting said generation means to said electrode means (20); and control means for varying the location of nodes and anti-nodes of standing waves generated in said chamber during processing, so that a plurality of standing waves are generated over time which are not coincident with one another.