Mocvd reactor having cylindrical gas inlet element

Abstract

The invention relates to a device for depositing semiconductor layers, comprising a process chamber () arranged substantially rotationally symmetrically about a center (), a susceptor (), a process chamber ceiling (), a gas inlet element () having gas inlet chambers () that are arranged vertically on top of each other, and a heater () arranged below the susceptor (), wherein the topmost () of the gas inlet chambers is directly adjacent to the process chamber ceiling () and is connected to a feed line () for feeding a hydride together with a carrier gas into the process chamber (), wherein the lowest () of the gas inlet chambers is directly adjacent to the susceptor () and is connected to a feed line () for feeding a hydride together with a carrier gas into the process chamber (), wherein at least one center gas inlet chamber () arranged between the lowest () and the topmost () gas inlet chamber is connected to a feed line () for feeding an organometallic compound into the process chamber (). According to the invention, the gas inlet chambers () are closed off toward the process chamber () by annular walls (), wherein the annular walls () comprise a plurality a gas outlet openings () arranged closely next to each other, have a uniform outside diameter, and an outer wall that is substantially without projections and directed toward the process chamber ().