Patent ID: 8721835
Filing Date: 2014-05-13
Classification: B05D,C23C,C30B,F15D,Y10T

Abstract:
1. An injector for injecting a gas into a processing chamber, the injector comprising: an inlet for receiving a gas wave or a gas flow, a flow-shaping section for expanding the gas in a direction perpendicular to a propagation axis of the gas, an outlet for expelling the gas, wherein the flow-shaping section has first and second sidewalls which diverge according to a divergence angle relative to the propagation axis of the gas, and wherein the flow-shaping section is configured to slow down a velocity of the gas near a center of the flow-shaping section, relative to a velocity of the gas near at least one of the sidewalls, and comprises: a first expansion region where at least one of the sidewalls diverges according to a first divergence angle, and a second expansion region where at least one of the sidewalls diverges according to a second divergence angle, smaller than the first divergence angle, and the second expansion region includes a constriction region having a first height near the center of the flow-shaping section and a second height near at least one of the sidewalls of the flow-shaping section, the first height being less than the second height.