Vapor deposition apparatus and method for forming thin film
First Claim
1. A vapor deposition apparatus comprising:
- a hollow reactor having a gas supply port at a top portion thereof and an exhaust port at a bottom portion thereof, said gas supply port being adapted to supply reaction gas into said reactor to form a thin film on a surface of a wafer substrate;
a rotational substrate holder positioned inside said reactor, said substrate holder being adapted to seat a wafer substrate; and
a straightening vane having a central portion and an outer portion extending radially outwardly from said central portion,wherein said central portion is defined by an area at least as large as an area of said substrate holder and concentric with said substrate holder, andwherein said central portion has first gas holes and said outer portion has second gas holes, the total area of the openings of said second gas holes being larger than that of the first gas holes.
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Accused Products
Abstract
A vapor deposition apparatus includes a cylindrical hollow reactor having gas supply ports at its upper portion and an exhaust port at its bottom portion. A rotational substrate holder, which seats a wafer substrate, is concentrically placed inside the reactor. The reactor has a straightening vane having gas holes concentrically positioned at its upper portion. Reaction gas is supplied into the reactor to form a thin film on the surface of the wafer substrate on the rotational substrate holder by vapor deposition. In one embodiment, the straightening vane is configured so that the flow rate of the reaction gas in the center portion covering the area of the wafer substrate and the gas flow rate of the reaction gas in the outer portion of the center portion are different from each other. In another embodiment, the reactor is sectioned into upper and lower portions. The inner diameter of the upper portion is smaller than the inner diameter of the lower portion. A link portion connects the lower end of the upper portion and the upper end of the lower portion. The link portion is provided with straightening gas flow-out holes. The rotational substrate holder is positioned below the lower end of the upper portion of the reactor by a predetermined height difference.
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Citations
25 Claims
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1. A vapor deposition apparatus comprising:
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a hollow reactor having a gas supply port at a top portion thereof and an exhaust port at a bottom portion thereof, said gas supply port being adapted to supply reaction gas into said reactor to form a thin film on a surface of a wafer substrate; a rotational substrate holder positioned inside said reactor, said substrate holder being adapted to seat a wafer substrate; and a straightening vane having a central portion and an outer portion extending radially outwardly from said central portion, wherein said central portion is defined by an area at least as large as an area of said substrate holder and concentric with said substrate holder, and wherein said central portion has first gas holes and said outer portion has second gas holes, the total area of the openings of said second gas holes being larger than that of the first gas holes. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 22)
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10. A vapor deposition apparatus comprising:
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a hollow reactor having a gas supply port in the upper portion thereof and an exhaust port in the lo wer portion thereof, said gas supply port being adapted to supply reaction gas into said reactor to form a thin film on a surface of a wafer substrate, said reactor being sectioned into upper and lower portions having different inner diameters, the inner diameter of said upper portion being smaller than the inner diameter of said lower portion; a link portion connecting the lower end of said upper portion to the upper end of the lower portion, said link portion having straightening gas flow-out holes; a rotational substrate holder, which is adapted to seat a wafer substrate, positioned inside said reactor below the lower end of said upper portion; and a straightening vane having a plurality of gas holes situated in the upper portion of the reactor, wherein said straightening gas flow-out holes are directed either vertically downwardly or downwardly and outwardly toward the lower portion to direct straightening gas away from the substrate holder. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A vapor deposition apparatus comprising:
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a hollow reactor having a gas supply port at a top portion thereof and an exhaust port at a bottom portion thereof, the gas supply port being adapted to supply reaction gas into the reactor to form a thin film on a surface of a wafer substrate; a rotational substrate holder positioned inside the reactor, the substrate holder being adapted to seat a wafer substrate; and a straightening vane having a central portion and an outer portion extending radially outwardly from the central portion, wherein a space area is defined between the top portion of the reactor and the rotational substrate holder, the space area being divided into at least two sections by a partition member disposed radially outwardly from the rotational substrate holder, at least two reaction gas supply ports being provided to each of the sections. - View Dependent Claims (23)
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24. A vapor deposition apparatus comprising:
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a hollow reactor having a gas supply port in the upper portion thereof and an exhaust port in the lower portion thereof, the gas supply port being adapted to supply reaction gas into the reactor to form a thin film on a surface of a wafer substrate, the reactor being sectioned into upper and lower portions having different inner diameters, the inner diameter of the upper portion being smaller than the inner diameter of the lower portion; a link portion connecting the lower end of the upper portion to the upper end of the lower portion, the link portion having straightening gas flow-out holes; a rotational substrate holder, which is adapted to seat a wafer substrate, positioned inside the reactor below the lower end of the upper portion; and a straightening vane having a plurality of gas holes situated in the upper portion of the reactor, wherein a space portion is provided above the link portion so as to hermetically envelop the straightening gas flow-out holes, the space portion being provided with straightening gas supply ports. - View Dependent Claims (25)
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Specification