Patent ID: 6793733
Filing Date: 2004-09-21
Classification: C23C

Abstract:
An apparatus for forming a material on a semiconductor wafer, the apparatus comprising:a processing chamber defined by walls; a wafer support positioned within the processing chamber and configured to receive a semiconductor wafer; a processing gas supply; and a gas distribution showerhead overlying the wafer support and including a tapered face plate proximate to the wafer support, an edge of the tapered face plate exhibiting a reduced thickness relative to a thickness of a center of the face plate to create a taper angle, such that material deposited on a wafer in contact with the wafer support exhibits a uniform center-to-edge thickness, the tapered faceplate further comprising, an inlet portion configured to receive a flow of a processing gas, the inlet portion comprising an aperture having a width, and an outlet portion configured to convey the processing gas flow to a semiconductor wafer, the outlet portion comprising an elongated slot in fluid communication with the aperture.