Patent ID: 9162236
Filing Date: 2015-10-20
Classification: B01F,B05B,C23C,H01J,H01L

Abstract:
1. A gas injection assembly, comprising: an inlet hub having an inner surface defining a ring-shaped recess; a nozzle having a plurality of injection passages; and a distribution insert disposed between the nozzle and the inlet hub, wherein the distribution insert has a ring-shaped body and is disposed in the ring-shaped recess of the inlet hub, first and second gas distribution passages includes channels formed between the distribution insert and the inner surface of the inlet hub, each of the first and second gas distribution passages connects the inlet hub to the plurality of the injection passages of the nozzle, the first gas distribution passage has one first inlet connecting with a plurality of first outlets, distances between the first inlet and each of the plurality of first outlets are substantially equal, the second gas distribution passage has one second inlet connecting with a plurality of second outlets, distances between the second inlet and each of the plurality of second outlets are substantially equal, the ring-shaped body has an inner wall at an inner diameter and an outer wall at an outer diameter, the plurality of first outlets are formed between grooves on the inner wall of the ring-shaped body and the inlet hub, and the plurality of second outlets are formed between grooves on the outer wall of the ring-shaped body and the inlet hub.