Patent ID: 8247977
Filing Date: 2012-08-21
Classification: H01J,H05H

Abstract:
1. A single induction coil for use in a plasma generator, the single induction coil comprising: a first terminal serving as a winding start; a second terminal serving as a winding end; and a plurality of wire portions, the wire portions connected to the first and second terminals, the wire portions are wound until a half turn on a virtual column surface to be located at symmetrical positions with respect to the virtual column surface, the wire portions are wound to intersect each other in an insulated state when wound at the half turn and are wound again after the half turn to be located at symmetrical positions with respect to the virtual column surface, the wire portions wound again after the half turn to be connected to each other to form a coil part, the wire portions having a different height after the half turn than a height of the wire portions before the half turn, the heights of the wire portions measured with respect to a longitudinal axis of the induction coil.