Patent ID: 8314560

Claim:
A plasma processing apparatus, wherein: an induction coil composed of n pieces of identically shaped coil elements (where n is equal to or greater than two), which are rotation-symmetrically arranged with respect to an axis normal to a surface of an object to be processed, is provided above the object, the coil elements being electrically connected in parallel; each of the coil elements of the induction coil encircles the aforementioned axis, where a ground end and a feed end of each coil element are located at a same position on a projection plane on the object with the ground end under the feed end; each of the coil elements has an n-story structure including: a bottom portion shaped like an arc having a predetermined width and a central angle of 360°/n, with the ground end at one end thereof; and a feed portion shaped like an arc having a predetermined width, with the feed end at one end thereof, the feed portion being located above the bottom portion and electrically connected to the same bottom portion via a connecting portion; and the ground end and the feed end of each of the coil elements are spaced apart from the other coil elements.