ATOMIC LAYER DEPOSITION APPARATUS
First Claim
1. A lateral flow atomic layer deposition (ALD) apparatus in which reactant gas flows in a gas flow direction substantially parallel to the surface of a circular substrate between the surface of the substrate and a side facing the substrate, comprising:
- a reaction chamber;
a substrate support configured to support the circular substrate within the reaction chamber; and
a part of the reaction chamber facing the substrate support, the reaction chamber part including a portion depressed away from the substrate support, wherein the reaction chamber part and the substrate support define a gas flow space above the substrate that is not uniform in height across the substrate in a direction perpendicular to the gas flow direction.
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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.
395 Citations
16 Claims
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1. A lateral flow atomic layer deposition (ALD) apparatus in which reactant gas flows in a gas flow direction substantially parallel to the surface of a circular substrate between the surface of the substrate and a side facing the substrate, comprising:
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a reaction chamber; a substrate support configured to support the circular substrate within the reaction chamber; and a part of the reaction chamber facing the substrate support, the reaction chamber part including a portion depressed away from the substrate support, wherein the reaction chamber part and the substrate support define a gas flow space above the substrate that is not uniform in height across the substrate in a direction perpendicular to the gas flow direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A method of conducting atomic lay 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 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. - View Dependent Claims (13, 14, 15, 16)
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Specification