Patent ID: 9034142
Filing Date: 2015-05-19
Classification: C23C

Abstract:
1. A temperature controlled showerhead assembly for use in a chemical vapor deposition (CVD) apparatus, the temperature controlled showerhead assembly comprising: a heat conductive stem, wherein the heat conductive stem comprises: a back plate attached to the heat conductive stem; a face plate thermally coupled to the heat conductive stem and attached to the back plate, the back plate including three or more stacked substantially solid disks decreasing in diameter from the attachment at the face plate to the attachment at the heat conductive stem, wherein the disk at the attachment at the face plate is configured to distribute a flow of gas to the face plate; and a temperature sensor thermally coupled to the face plate, wherein the temperature controlled showerhead is configured to maintain the temperature of the face plate within a predetermined range by providing heat transfer paths between the heating element and the face plate and between the heat exchanger and the face plate.