Atomic layer deposition apparatus
First Claim
1. A method of conducting atomic layer deposition (ALD), comprising:
- providing a substrate in a reaction chamber; and
alternately and sequentially supplying at least two ALD reactants into the reaction chamber space over the substrate in a gas flow direction parallel to the substrate, wherein the reaction space has a concave ceiling with a tubular shape such that the reaction space has a height over a center of the substrate greater than a height over edges of the substrate in a cross-sectional view perpendicular to the gas flow direction, and such that the reaction space has substantially the same height along the gas flow direction,wherein the height over the center and the height over the edges are such that a maximum gas flow over the substrate is over the center, and a minimum gas flow rate over the substrate is over the edges, andwherein gas flow rates decrease in the direction perpendicular to the gas flow direction from the maximum flow rate over the center to the minimum flow rate over the edges.
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Accused Products
Abstract
The present invention relates to an ALD apparatus, and particularly relates to an ALD apparatus that is suitable for rapidly depositing a thin film on a substrate having an actual area that is larger than a planar substrate. In the reaction chamber of the ALD apparatus according to an exemplary embodiment of the present invention, more gas is supplied to a portion where more gas is required by having differences in the space for gas to flow rather than supplying the gas in a constant flux and a constant flow velocity such that the time required for supplying reactant gases and waste of reactant gases may be minimized to increase productivity of the ALD apparatus. The ceiling of the reaction space is shaped to provide a nonuniform gap over the substrate.
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Citations
9 Claims
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1. A method of conducting atomic layer deposition (ALD), comprising:
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providing a substrate in a reaction chamber; and alternately and sequentially supplying at least two ALD reactants into the reaction chamber space over the substrate in a gas flow direction parallel to the substrate, wherein the reaction space has a concave ceiling with a tubular shape such that the reaction space has a height over a center of the substrate greater than a height over edges of the substrate in a cross-sectional view perpendicular to the gas flow direction, and such that the reaction space has substantially the same height along the gas flow direction, wherein the height over the center and the height over the edges are such that a maximum gas flow over the substrate is over the center, and a minimum gas flow rate over the substrate is over the edges, and wherein gas flow rates decrease in the direction perpendicular to the gas flow direction from the maximum flow rate over the center to the minimum flow rate over the edges. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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Specification