DEPOSITION BY ADSORPTION UNDER AN ELECTRICAL FIELD
First Claim
1. A method for depositing by adsorption a material onto a substrate, comprising:
- exposing the substrate to a precursor in the gaseous phase, with the precursor molecules presenting a non-zero dipole moment, and applying an electrical field during substrate exposing so as to adsorb precursor molecules onto the substrate.
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Abstract
A method for depositing a material by adsorption onto a substrate, includes a step of exposing the substrate to a precursor molecule in the gaseous phase. These precursor molecules present a non-zero dipole moment. An electrical field is applied during the substrate exposing step to cause a reactive branch of the precursor molecules to adsorb into the surface of the substrate in a manner such that the precursor molecules have essentially a same orientation. Next, the substrate is exposed to reagent molecules in the gaseous phase which react with the adsorbed precursor molecules so that organic branches of the adsorbed precursor molecules other than the reactive organic branch are replaced by elements of the reagent molecules. This process results in the formation of a monoatomic layer.
389 Citations
20 Claims
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1. A method for depositing by adsorption a material onto a substrate, comprising:
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exposing the substrate to a precursor in the gaseous phase, with the precursor molecules presenting a non-zero dipole moment, and applying an electrical field during substrate exposing so as to adsorb precursor molecules onto the substrate. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for depositing by adsorption a material onto a substrate, comprising:
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exposing the substrate to precursor molecules in the gaseous phase, these precursor molecules presenting a dipole moment and each having an organic branch which is reactive and aligned with the dipole;
applying an electrical field oriented perpendicular to a surface of the substrate to which the precursor molecules are adsorbed through contact with the reactive organic branches. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A method, comprising:
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forming a trench in a substrate, the trench having opposed vertical walls and a floor;
exposing the substrate to precursor molecules in the gaseous phase, these precursor molecules presenting a dipole moment and each having an organic branch which is reactive and aligned with the dipole;
applying a electrical field oriented perpendicular to the vertical walls of the trench so that the precursor molecules are adsorbed to the vertical walls through contact with the reactive organic branches. - View Dependent Claims (17, 18, 19, 20)
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Specification