Patent ID: 9587312
Date: 2017-03-07
CPC Classifications: C23C,C30B

Claim:
1. A gas inlet member ( 2 ) of a chemical vapor deposition (CVD) reactor, comprising a gas inlet housing which has at least one first gas distribution volume ( 5 ) that can be supplied with a first process gas by a first feed line ( 21 ) and has a multiplicity of first gas lines ( 8 ) which are each formed as a tube and have extensions ( 15 ) that engage in first openings ( 16 ) of a gas outlet plate ( 14 ) arranged in front of a gas inlet housing wall ( 10 ), and through which the first process gas enters a process chamber located beneath the gas outlet plate ( 14 ), and further comprising a clearance space ( 20 ) provided between the gas inlet housing wall ( 10 ) and the gas outlet plate ( 14 ), and a coolant chamber ( 7 ) that adjoins the gas inlet housing wall ( 10 ) and into which a coolant can be fed so as to cool the gas inlet housing wall ( 10 ), wherein the gas inlet housing has a second gas distribution volume ( 6 ) which can be fed by a second feed line ( 23 ) and which is connected to the gas inlet housing wall ( 10 ) via a multiplicity of second gas lines ( 9 ), wherein the second gas lines ( 9 ) open into the clearance space ( 20 ), characterized in that outlet ( 8 ′) ends of extensions ( 15 ) of the gas lines ( 8 ) are in heat-conductive contact with the cooled gas inlet housing wall ( 10 ), and the gas outlet plate ( 14 ) is thermally decoupled with respect to the gas inlet housing wall ( 10 ) in such a manner that the gas outlet plate ( 14 ), which is acted on by radiation heat from a process chamber ( 22 ), heats up more intensely than the outlet ( 8 ′) ends which extend into the first openings ( 16 ) of the gas outlet plate ( 14 ).