Patent ID: 8202394
Filing Date: 2012-06-19
Classification: H01J,H01L

Abstract:
1. A semiconductor manufacturing apparatus, comprising: a process chamber having a conductive inner wall defining a reaction room; a cathode which mounts a semiconductor substrate to be processed in said process chamber; an anode electrode which is arranged oppositely to the cathode in said process chamber, said semiconductor substrate being subjected to a desired processing by introducing a process gas into said process chamber, and plasma being generated in said process chamber through impression of a radio-frequency power onto said cathode; a radio-frequency power control unit which impresses a radio-frequency power onto said cathode by switching over a level of the radio-frequency power in response to each of a plurality of processing steps while holding said semiconductor substrate in said process chamber; and a power supply connected to the process chamber and configured to supply a potential to the conductive inner wall, with said potential configured to be negative to the potential of said anode electrode, during a plasma-processing operation in which said semiconductor substrate is processed, so that the reaction room is defined by the potential-supplied conductive inner wall.