Patent ID: 9534289
Date: 2017-01-03
CPC Classifications: C23C,H01J

Claim:
1. A process chamber, comprising: an enclosure having a process volume for forming plasma therein; a substrate support having a substrate receiving surface, the substrate support disposed within the enclosure for positioning a front surface of a substrate with respect to the process volume; and a distribution grid disposed between the process volume and the substrate support, the distribution grid including a first surface facing the substrate support and a focusing surface opposite the first surface, the focusing surface angled relative to the substrate receiving surface of the substrate support, wherein the distribution grid also includes an inner surface connecting the focusing surface with the first surface, the inner surface forming a passageway through the focusing surface and the first surface, the passageway having a center axis which is angled with respect to the substrate receiving surface of the substrate support, and wherein the distribution grid is rotatable about an axis that is offset from a center of the distribution grid.