Patent ID: 9057128
Filing Date: 2015-06-16
Classification: B05B,C23C

Abstract:
1. A showerhead assembly, comprising: a first plate; a second plate coupled to the first plate to form a gas manifold; a third plate coupled to the second plate and having one or more temperature control channels disposed therein, the one or more temperature control channels isolated from a processing volume and configured to circulate a heat exchanging fluid from an inlet formed in the third plate to an outlet formed in the third plate, wherein the third plate has a first plurality of gas passages and a second plurality of gas passages formed therethrough, the first plurality of gas passages and the second plurality of gas passages surrounded by the one or more temperature control channels; and a fourth plate disposed between the second plate and the third plate, wherein the fourth plate has a plurality of channels formed therein that are fluidly coupled to the second plurality of gas passages in the third plate, and wherein the fourth plate has a plurality of gas passages formed therethrough fluidly coupling the gas manifold with the first plurality of gas passages in the third plate, the fourth plate having a bottom surface exposed to the processing volume.