Gas blocker plate for improved deposition

摘要

Embodiments of the present invention are directed to a blocker for a gas distribution system for use in semiconductor deposition apparatus. The gas distribution system includes a faceplate having a plurality of faceplate apertures to distribute a gas flow onto a surface of a substrate disposed downstream of the faceplate for film deposition on the substrate; and a blocker disposed upstream of the faceplate. The blocker includes a generally planar blocker surface facing the faceplate and a side wall disposed around a periphery of the blocker surface. The blocker surface includes a plurality of blocker holes to permit gas flow therethrough to the faceplate. The side wall is disposed near an edge of the faceplate and includes a plurality of side apertures to permit gas flow therethrough to the faceplate.