Patent ID: 7655543
Filing Date: 2010-02-02
Classification: C23C,C30B

Abstract:
1. An apparatus for selectively forming a semiconductor film on a substrate, the apparatus comprising: a chemical vapor deposition (CVD) reactor comprising a reaction space; a substrate support within the reaction space, wherein the substrate support is sized and shaped to receive a substrate; a first inlet set of one or more inlets in fluid communication with the reaction space; a second inlet set of one or more inlets in fluid communication with the reaction space; a first gas source configured to supply a precursor for semiconductor deposition to the first inlet set; and a second gas source configured to supply an etchant to the second inlet set, wherein the inlet sets and sources define separate flow paths for the precursor and the etchant to a mixing space within the reaction space, and wherein the flow paths and reaction space are positioned such that the etchant and precursor are uniformly mixable and have a common flow path from the mixing space to the substrate on the substrate support for selectively forming a semiconductor film on the substrate.