Chemical vapor deposition reactor and method of operation
First Claim
1. A chemical vapor deposition (CVD) reactor comprisinga housing forming a closed cylindrical chamber suitable for maintaining a deposition substrate in an environment of selected pressure,means arranged at one axial end of the cylindrical chamber for supporting the substrate,a wall spaced apart from the support means and arranged at the other axial end of the cylindrical chamber,means for introducing reactant gas into the chamber,multiple exhaust vents spaced apart from each other and arranged in communication with the cylindrical chamber about its periphery, andvalve means operatively coupled with the individual exhaust vents and sequentially operable for inducing a selected pattern of flow vectors for the reactant gas in the chamber adjacent the deposition substrate in order to enhance deposition uniformity and/or conformance.
14 Assignments
0 Petitions
Accused Products
Abstract
A chemical vapor deposition (CVD) reactor and method are disclosed wherein a chamber, preferably configured for receiving a single wafer as a deposition substrate, has multiple gas inlet orifices and exhaust ports which are independently adjustable for dynamically varying and controlling directionality of local gas flow vectors toward and past the deposition substrate. The injection angle of reactant gas being introduced into the chamber is adjusted by baffles for statically deflecting gas flow entering the chamber. Adjustment of the gas inlet orifices and/or exhaust ports and adjustment of the injection angle for the reactant gas is selected for achieving enhanced coating uniformity, and conformality of deposition if necessary or desired, on the substrate.
-
Citations
29 Claims
-
1. A chemical vapor deposition (CVD) reactor comprising
a housing forming a closed cylindrical chamber suitable for maintaining a deposition substrate in an environment of selected pressure, means arranged at one axial end of the cylindrical chamber for supporting the substrate, a wall spaced apart from the support means and arranged at the other axial end of the cylindrical chamber, means for introducing reactant gas into the chamber, multiple exhaust vents spaced apart from each other and arranged in communication with the cylindrical chamber about its periphery, and valve means operatively coupled with the individual exhaust vents and sequentially operable for inducing a selected pattern of flow vectors for the reactant gas in the chamber adjacent the deposition substrate in order to enhance deposition uniformity and/or conformance.
-
15. A chemical vapor deposition (CVD) reactor comprising
a housing forming a chamber suitable for maintaining a deposition substrate in an environment of selected pressure, means for supporting the deposition substrate in the chamber, means for introducing reactant gas into the chamber, multiple exhaust vents spaced apart from each other and arranged in communication with the chamber, and valve means operatively coupled with the individual exhaust vents and sequentially operable for inducing a selected pattern of flow vectors for the reacted gas in the chamber adjacent the substrate in order to enhance deposition uniformity and/or conformance.
-
25. A chemical vapor deposition (CVD) method comprising the steps of
arranging a deposition substrate in a chamber at a selected pressure, introducing reactant gas into the chamber, connecting multiple exhaust vents in spaced apart relation with each other and in communication with the chamber, and selectively regulating communication of the exhaust vents with the chamber for inducing a selected pattern of flow vectors for the reactant gas in the chamber adjacent the substrate in order to enhance deposition uniformity and/or conformance.
Specification