Plasma enhanced chemical vapor deposition system
First Claim
1. A system for effecting chemical vapor deposition upon a substrate of one or more reactant gases carried by at least one carrier gas comprising:
- a) a reactor housing sealed against the atmosphere;
b) a gas distribution housing for receiving a plurality of pipes through which the reactant and carrier gases flow;
c) a temperature control chamber located within said distribution housing and coupled to an external source of temperature controlled fluid, said pipes carrying said reactant and carrier gases passing through said temperature control chamber so that the temperature of the gases flowing therethrough is affected by the temperature control fluid;
d) a diffusion chamber located within said distribution housing and connected to the carrier gas, said diffusion chamber having a gas permeable wall through which the carrier gas will flow so as to impart a uniform flow a the carrier gas over the area of the chamber;
e) a reactant distribution chamber located beneath the gas permeable wall of the diffusion chamber, said distribution chamber being connected to the pipes carrying the reactant gases, said distribution chamber being sub-divided by means of baffle means, said baffle means precluding mixing of said selected ones of the reactant gases within said reactant distribution chamber;
f) a conductive porous mesh located beneath said distribution chamber;
g) an electrode located within said distribution housing and being electrically connected to said conductive porous mesh and a source of RF for generating a plasma from one or more of the reactant gases;
h) a substrate carrier for mounting said substrate in proximity to the gas distribution housing; and
i) a temperature control unit for heating or cooling the substrate carried by the substrate carrier.
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Accused Products
Abstract
A Metal Organic Chemical Vapor Deposition (MOCVD) system particularly suitable for use at low deposition pressures and high or low temperatures. The system includes a reactor chamber having a reactant gas distribution unit (showerhead) which may be height adjustable having a temperature control chamber, for controlling the temperature of the reactants, a chamber for providing a uniform flow of carrier gas and a gas distribution chamber which includes baffling which can preclude gas phase mixing of the reactants. The gas distribution unit also includes an integral plasma generating electrode system for providing plasma enhanced deposition with controlled distribution of reactants. Also located in the reactor chamber is a temperature control unit for heating and/or cooling the wafers and a non-levitating rotating wafer carrier.
134 Citations
16 Claims
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1. A system for effecting chemical vapor deposition upon a substrate of one or more reactant gases carried by at least one carrier gas comprising:
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a) a reactor housing sealed against the atmosphere;
b) a gas distribution housing for receiving a plurality of pipes through which the reactant and carrier gases flow;
c) a temperature control chamber located within said distribution housing and coupled to an external source of temperature controlled fluid, said pipes carrying said reactant and carrier gases passing through said temperature control chamber so that the temperature of the gases flowing therethrough is affected by the temperature control fluid;
d) a diffusion chamber located within said distribution housing and connected to the carrier gas, said diffusion chamber having a gas permeable wall through which the carrier gas will flow so as to impart a uniform flow a the carrier gas over the area of the chamber;
e) a reactant distribution chamber located beneath the gas permeable wall of the diffusion chamber, said distribution chamber being connected to the pipes carrying the reactant gases, said distribution chamber being sub-divided by means of baffle means, said baffle means precluding mixing of said selected ones of the reactant gases within said reactant distribution chamber;
f) a conductive porous mesh located beneath said distribution chamber;
g) an electrode located within said distribution housing and being electrically connected to said conductive porous mesh and a source of RF for generating a plasma from one or more of the reactant gases;
h) a substrate carrier for mounting said substrate in proximity to the gas distribution housing; and
i) a temperature control unit for heating or cooling the substrate carried by the substrate carrier. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A distribution unit for at least first and second reactant gases and at least one carrier gas in a CVD system comprising:
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a) a distribution housing for receiving a plurality of pipes through which the reactant and carrier gases flow;
b) a temperature control chamber located within said distribution housing and coupled to an external source of temperature controlled fluid, said pipes carrying said reactant and carrier gases passing through said temperature control chamber so that the temperature of the gases flowing therethrough is affected by the temperature control fluid;
c) a diffusion chamber located within said distribution housing and connected to s source of carrier gas, said diffusion chamber having a gas permeable wall through which the carrier gas will flow so as to impart a uniform flow of the carrier gas;
d) a reactant distribution chamber located beneath the gas permeable wall of the diffusion chamber, said distribution chamber being connected to the pipes carrying the reactant gases, e) a conductive porous mesh located beneath said distribution chamber;
f) an electrode located within said distribution housing and being electrically connected to said conductive porous mesh and a source of RF for generating a plasma from one or more of the reactant gases. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification