Deposition of transition metal carbides
First Claim
1. A method of producing a thin film by an atomic layer deposition (ALD) process, in which each of a plurality of cycles comprises exposing an adsorbed metal complex on a substrate to a carbon compound, the carbon compound reacting with the adsorbed metal complex to form no more than about one monolayer of metal carbide, wherein the carbon compound is selected from the group consisting of organic boron compounds, organic silicon compounds and organic phosphorus compounds.
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Abstract
The present invention relates generally to a method of depositing transition metal carbide thin films. In particular, the invention concerns a method of depositing transition metal carbide thin films by atomic layer deposition (ALD), in which a transition metal source compound and a carbon source compound are alternately provided to the substrate. A variety of metal and carbon source gases are disclosed. The methods are applicable to forming metal carbide thin films in semiconductor fabrication, and particularly to forming thin, conductive diffusion barriers within integrated circuits.
108 Citations
35 Claims
- 1. A method of producing a thin film by an atomic layer deposition (ALD) process, in which each of a plurality of cycles comprises exposing an adsorbed metal complex on a substrate to a carbon compound, the carbon compound reacting with the adsorbed metal complex to form no more than about one monolayer of metal carbide, wherein the carbon compound is selected from the group consisting of organic boron compounds, organic silicon compounds and organic phosphorus compounds.
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27. A method of producing a metal carbide thin film in an integrated circuit by an atomic layer deposition (ALD) process, in which each of a plurality of cycles comprises:
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introducing a metal source gas into a reaction space containing a substrate to form an adsorbed metal complex;
removing excess metal source gas and any gaseous reaction byproducts from the reaction space;
introducing an organic boron compound into the reaction space; and
removing excess organic boron compound and any gaseous reaction byproducts from the reaction space. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35)
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Specification