Patent ID: 7686889

Claim:
A susceptor for a semiconductor manufacturing apparatus that secures a substrate thereon by vacuum chucking, comprising: a support member on which the substrate is placed; a recessed pocket formed within an upper surface of the support member; a seal band defining an outer peripheral region of the susceptor and supporting the substrate at the outer peripheral region of the susceptor; a through hole which is formed in the recessed pocket and through which evacuation is made from the upper surface of the support member toward a lower surface thereof in order to secure the substrate onto an upper surface of the seal band by said vacuum chucking; and at least one gas channel formed on the upper surface of the seal band to allow gas to pass through the gas channel from an outer circumference of the seal band toward the recessed pocket; wherein said susceptor is positioned for holding the substrate during semiconductor processing of the substrate wherein the upper surface of the seal band has a continuous waveform in a circumference direction, and a recessed part of the waveform serves as the gas channel.