Patent ID: 9702043
Date: 2017-07-11
CPC Classifications: C23C

Claim:
1. A substrate processing apparatus comprising: a vacuum chamber; a turntable rotatably provided in the vacuum chamber, on which a circular substrate is to be mounted, and provided with a circular concave portion at a front surface having a larger diameter than that of the substrate, and a circular substrate mounting portion provided in the circular concave portion having a diameter smaller than that of the circular concave portion and the substrate and protruding from a bottom portion of the circular concave portion so as to mount the substrate at a position higher than the bottom portion of the circular concave portion; a process gas supplying unit which supplies a process gas to the substrate; and a vacuum evacuation mechanism which evacuates the vacuum chamber, wherein the substrate mounting portion has the diameter smaller than that of the substrate and is off center with respect to the center of the circular concave portion toward an outer peripheral portion side of the turntable such that an entire perimeter of a peripheral edge portion of the substrate is protruded from the substrate mounting portion when the substrate contacts an inner wall surface of the circular concave portion by centrifugal force in accordance with the rotation of the turntable, and wherein the turntable is configured to have only one substrate mounting portion in the circular concave portion, said substrate mounting portion having an outer periphery including an upper end and a lower end, said upper end of the outer periphery having a diameter larger than that of the lower end of the outer periphery.