Patent ID: 8052796
Filing Date: 2011-11-08
Classification: C23C

Abstract:
1. Device for depositing in particular crystalline layers on in particular crystalline substrates, comprising a process chamber which is disposed in a reactor housing and has a substrate holder for receiving one or more substrates, opposite which substrate holder there is a gas inlet member, the front plate of which, facing the substrate holder and forming a gas outlet surface, has a multiplicity of substantially uniformly distributed outlet openings for process gases that are to be introduced into the process chamber, characterized by a multiplicity of sensors, wherein said gas inlet member has a front plate forming said outlet openings and a rear wall having an intake for said process gasses, and wherein said rear wall is spaced apart from said front plate forming a feed gas chamber between said front plate and said rear wall where said process gasses are fed through said intake into said feed gas chamber and then to said outlet openings, wherein said feed gas chamber is common to, and supplies process gases to, all of said outlet openings, and wherein said optical sensors are disposed in said rear wall of said chamber and each of said optical sensors is in alignment with an axis of one of said outlet openings of said front plate.