Patent ID: 8152924

Claim:
Apparatus for depositing at least one layer on a substrate by means of a process gas, which is introduced into a rotationally symmetrical process chamber ( 1 ) that extends in a horizontal direction through a first flow channel ( 4 ) of a gas inlet element ( 3 ), the first flow channel extending in a vertical direction and the gas inlet element being fixed in position on a reactor housing, the process gas exiting from a gas outlet opening of a portion of the gas inlet element ( 3 ) that projects into a center of the process chamber ( 1 ) and flowing in a radially outward direction over a floor ( 8 ′) of the process chamber ( 1 ), the floor extending in a horizontal direction and rotating about the center of the process chamber, and the substrate lying on the floor, the apparatus characterized in that an end ( 3 ′) of the gas inlet element ( 3 ) projects into a dish-like recess ( 23 ) in the floor ( 8 ′) and an end portion ( 6 ′) of a gas-deflecting surface ( 6 ) of the gas inlet ( 3 ) is aligned with the floor ( 8 ′).