Patent ID: 7524395
Filing Date: 2009-04-28
Classification: H01J,H01L

Abstract:
1. A plasma chamber comprising: a chamber body for defining a reaction space, capable of forming plasma, by a sidewall of the chamber body, a lower exterior wall of the chamber body, and an upper dome of the chamber body; a plasma source coil arranged on the dome, for including unit coils arranged to have a turning number “n” calculated using a value of n=a×(b/m) (where “a” and “b” are both positive integers, and “m” is indicative of the number of unit coils corresponding to an integer greater than “2”), allowing the unit coils to be extended from a center bushing which has a radius at a center part, and allowing the unit coils to be spirally arranged along a circumference of the center bushing, such that the plasma is formed in the reaction space; and a cylindrical-shaped edge bushing arranged between the dome of the chamber body and the plasma source coil, and for overlapping with an edge of a wafer disposed in the reaction space.