Patent ID: 7319295

Claim:
A radio frequency power supply structure for use in a device generating plasma by charging a plate-like electrode, facing an earth electrode, with a radio frequency power, said radio frequency power supply structure supplying said plate-like electrode with the radio frequency power from an RF cable, wherein said RF cable is positioned on an extended plane of a plane formed by said plate-like electrode to connect to said plate-like electrodes, a core cable of said RF cable has an end portion curved to match a connecting width of said plate-like electrode so as to form a smoothly curved continuous surface at a connecting portion provided between the curved end portion of the core cable of said RF cable and said plate-like electrode, on an end peripheral portion of said plate-like electrode, and said plate-like electrode forms a longitudinal grid plate shape facing said earth electrode having two lateral electrodes forming two mutually opposed end peripheral portions of said plate-like electrode, and a plurality of longitudinal electrodes arranged between said two lateral electrodes so as to connect to said two lateral electrodes.