Process and apparatus for the low pressure chemical vapor deposition of thin films
First Claim
1. A process for the low pressure chemical vapor deposition of a metallic film which comprises the steps of:
- providing a tubular reaction chamber having first and second ends;
providing first and second end caps for sealing said first and second ends, respectively;
sealing said first and second end caps to said first and second ends;
providing a U-shaped injector tube having input and exhaust ends coupled to and allowing passage of reactants through said first end cap, into said reaction chamber, and out said first end cap, said injector tube including a plurality of injection holes positioned within said reaction chamber;
inserting a deposition surface into said reaction chamber;
coupling said reaction chamber to a vacuum pump through said first end cap and reducing the pressure in said reaction chamber;
heating said deposition surface to an elevated temperature;
coupling said input end of said injector tube to a source of a high molecular weight metallic reactant compound;
coupling said exhaust end of said injector tube to a vacuum pump and pumping said metallic reactant compound through said injector tube to cause injection of said metallic compound reactant through said plurality of injection holes;
controlling the amount of said metallic reactant compound exhausted through said exhaust end;
injecting a second reactant into said reaction chamber; and
reacting said metallic reactant compound and said second reactant to deposit a metallic film on said deposition surface.
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Accused Products
Abstract
A process and apparatus for LPCVD of thin metallic films is disclosed. The apparatus includes a U-shaped injection tube through which high molecular weight reactants are injected into a reaction chamber. The input and output ends of the U-shaped tube are coupled to a removeable feedthrough plate which, in turn, is coupled to the end cap which seals one end of the reaction chamber. A deposition surface is placed in the chamber through a second end cap at the opposite end of the chamber. The output end of the U-shaped injection tube is coupled to a vacuum pump and the high molecular weight reactant is drawn through the injection tube and dispersed in the reaction chamber through a plurality of holes in the input side of the injection tube.
92 Citations
25 Claims
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1. A process for the low pressure chemical vapor deposition of a metallic film which comprises the steps of:
- providing a tubular reaction chamber having first and second ends;
providing first and second end caps for sealing said first and second ends, respectively;
sealing said first and second end caps to said first and second ends;
providing a U-shaped injector tube having input and exhaust ends coupled to and allowing passage of reactants through said first end cap, into said reaction chamber, and out said first end cap, said injector tube including a plurality of injection holes positioned within said reaction chamber;
inserting a deposition surface into said reaction chamber;
coupling said reaction chamber to a vacuum pump through said first end cap and reducing the pressure in said reaction chamber;
heating said deposition surface to an elevated temperature;
coupling said input end of said injector tube to a source of a high molecular weight metallic reactant compound;
coupling said exhaust end of said injector tube to a vacuum pump and pumping said metallic reactant compound through said injector tube to cause injection of said metallic compound reactant through said plurality of injection holes;
controlling the amount of said metallic reactant compound exhausted through said exhaust end;
injecting a second reactant into said reaction chamber; and
reacting said metallic reactant compound and said second reactant to deposit a metallic film on said deposition surface. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 13)
- providing a tubular reaction chamber having first and second ends;
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11. A reaction apparatus for the low pressure chemical vapor deposition of thin films which comprises:
- a tubular reaction chamber having first and second ends;
a first end cap sealed to said first end and having means for inserting a deposition surface therethrough and for enclosing said first end;
a second end cap sealed to said second end and having a feedthrough plate removably joined thereto for enclosing said second end;
a U-shaped injector tube positioned within said chamber including input and output ends coupled through said feedthrough plate and a plurality of injection holes located in said chamber;
means for coupling said input end to a reactant source;
means for coupling said output end to a vacuum pump;
means for reducing the pressure in said chamber; and
means for heating a deposition substrate positioned in said chamber. - View Dependent Claims (12, 14, 15, 16, 17, 18, 19)
- a tubular reaction chamber having first and second ends;
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20. A process for the low pressure chemical vapor deposition of a film which comprises the steps of:
- providing a tubular reaction chamber having first and second ends;
providing first and second end caps for sealing said first and second ends, respectively;
providing a U-shaped injector tube having input and exhaust ends coupled to and allowing passage of reactants through said first end cap, into said reaction chamber, and out said first end cap, said injector tube including a plurality of injection holes positioned within said reaction chamber, and out said first end cap, said injector tube including a plurality of injection holes positioned within said reaction chamber;
inserting a deposition surface into said reaction chamber;
reducing the pressure in said reaction chamber;
heating said deposition surface to an elevated temperture;
coupling said input end of said injector tube to a source of at least one reactant;
coupling said exhaust end of said injector tube to a vacuum pump and pumping said reactant through said injector tube to cause injection of said reactant through said plurality of injection holes;
controlling the amount of said reactant exhausted through said exhaust end; and
reacting said reactant to deposit a film on said deposition surface. - View Dependent Claims (21, 22, 23, 24, 25)
- providing a tubular reaction chamber having first and second ends;
Specification