Patent ID: 9371584
Filing Date: 2016-06-21
CPC Classification: C23C,H01L

Claim Text:
1. A processing chamber comprising: a chamber body; a support structure disposed in the chamber body, the support structure having an upper surface configured to support a substrate thereon; a plurality of lift pins extendable through the upper surface for spacing the substrate above the upper surface and retractable to set the substrate on the upper surface; a plurality of alignment pins disposed through the support structure, each of the alignment pins having a conical contact surface, the alignment pins arranged in two pairs of parallel rows, each row having an orientation 90 degrees offset from the adjacent row, the conical contact surface movable between a retracted position below the upper surface of the support structure and an extended position above the upper surface of the support structure, wherein the conical contact surface disposed above the upper surface of the support structure when in the extended position contacts an edge of the substrate to provide a lateral force on an edge of the substrate to center the substrate on the upper surface of the support structure; and a plurality of restriction assemblies, arranged in a rectangular pattern, coupled to and projecting above the upper surface in a position to retain the substrate between the plurality of restriction assemblies after centering by, and retraction of, the alignment pins.