Patent ID: 7073521
Filing Date: 2006-07-11
Classification: H01L,H02K,Y10S

Abstract:
1. A substrate processing apparatus for processing a substrate, comprising: a motor having a ring-shaped stationary part and a ring-shaped rotating part with a predetermined central axis as a center thereof, said rotating part rotating about said central axis; and a holding part provided on said rotating part, for holding said substrate, wherein said stationary part comprises: a group of induction coils in a ring shape, for being supplied with multiphase alternating current; a duct for cooling water provided along said group of induction coils; a gas supply line for supplying gas to a clearance between said rotating part and said stationary part to make said rotating part smoothly rotatable with a mechanism of a static pressure gaseous bearing; and a plurality of rotating members which rotate between said stationary part and said rotating part to make said rotating part rotatable with respect to said stationary part, and said rotating part has a conductive member or a magnetic member having an endring which gains a rotating force by a traveling magnetic field caused along said group of induction coils; wherein said rotating part has an inner ring member whose section has a three-sided rectangular shape and opens outward from said central axis, said clearance is provided between inner surfaces including upper and lower surfaces near an inner side surface of said stationary part and surfaces of said inner ring member opposed to said inner surfaces, said gas supply line supplies gas from at least said inner side surface of said stationary part to said clearance, and said group of induction coils are located outside of said clearance with respect to said central axis.