Patent ID: 11923233
Assignee: APPLIED MATERIALS, INC.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  C | IPC C  H

Claim 0:
1. A substrate support pedestal comprising:
a support body having a top surface and a bottom surface defining a thickness;
a pocket formed in the top surface of the support body, the pocket having a bottom surface, a depth and an outer peripheral edge; and
a seal band conforming to a shape of and spaced a distance from the outer peripheral edge of the pocket to form an inner pocket region and an outer pocket region, the seal band having a top surface an inner face and an outer face defining a width, the seal band providing controlled leakage of gases from the inner pocket region through the width of the seal band to the outer pocket region, wherein the seal band property providing controlled leakage of gases comprises one or more of cut outs in the top surface of the seal band, a roughened top surface of the seal band, channels extending through the width of the seal band or a porous material composition, wherein the seal band has a height sufficient so that a wafer supported on the top surface of the seal band is substantially coplanar with the top surface of the support body.