US Patent 11492698 Optically transparent pedestal for fluidly supporting a substrate

A pedestal for a thermal treatment chamber is disclosed that includes a body consisting of an optically transparent material. The body includes a first plate with a perforated surface having a plurality of nozzles formed therein, a first portion of the plurality nozzles formed in the body at an angle that is orthogonal to a plane of the first plate, a second portion of the plurality of nozzles formed in the body in an azimuthal orientation and at an acute angle relative to the plane of the first plate, and a third portion of the plurality nozzles formed in the body in a radial orientation and at an acute angle relative to the plane of the first plate.