CVD REACTOR AND METHOD FOR DEPOSITING A COATING

The invention relates to a CVD reactor having a process chamber (1), the floor (3) of which is formed by a susceptor (2) for receiving substrates (4) to be coated with a layer and the ceiling (6) of which is formed by the underside of a gas inlet element (5) that has a multiplicity of gas inlet openings (13, 14) distributed uniformly over its entire surface, the gas inlet openings (13, 14) being divided into strip-like first and second gas inlet zones (11, 12) that run parallel to one another in a direction of extent, the gas inlet openings (13) of a first gas inlet zone (11) being connected to a common first process-gas feed line (9) for introducing a first process gas into the process chamber (1), the gas inlet openings (14) of a second gas inlet zone (12) being connected to a common first process-gas feed line (10), which is different from the first process-gas feed line (9), for introducing a second process gas into the process chamber (1), and the first and second gas inlet zones (11, 12) lying alternatingly alongside one another. The spacing (D) of a multiplicity of gas inlet openings (13, 14) of each gas inlet zone (11, 12) that lie side by side transverse to the direction of extent is to be approximately one quarter of the height (H) of the process chamber (1) and the width (W) of an individual gas inlet zone (11, 12) is to correspond approximately to the height (H).