Method of film deposition using single-wafer-processing type CVD
First Claim
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1. A method of film deposition comprising the steps of:
- placing a wafer on a susceptor positioned inside a wafer-handling chamber disposed under a reaction chamber included in a single-wafer-processing type CVD apparatus;
positioning the wafer inside the reaction chamber by raising the susceptor;
when the susceptor moves to the position, separating the reaction chamber and the wafer-handling chamber by making closely in contact a periphery of the susceptor and a circular separation plate disposed coaxially with the susceptor and between the reaction chamber and the wafer-handling chamber;
emitting a jet of reaction gas from a showerhead disposed inside the reaction chamber onto the wafer to be processed;
depositing a film on the wafer;
during the deposition, discharging an inert gas from the wafer-handling chamber to the reaction chamber through at least one gas discharge hole formed through the susceptor from its bottom to its top, and via a back side of the wafer placed on the susceptor and a periphery of the wafer;
evacuating the reaction chamber through an exhaust duct, which is positioned in the vicinity of the showerhead and is provided circularly along an inner wall of the reaction chamber; and
after the deposition, lowering the susceptor and moving the wafer to the wafer-handling chamber.
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Abstract
A method of film deposition using a single-wafer-processing type CVD apparatus includes: (a) sealing a periphery of a susceptor to separate a reaction chamber from a wafer-handling chamber when the susceptor rises; and (b) flowing a gas from the wafer-handling chamber into the reaction chamber through at least one discharge hole formed through the susceptor via a back side and a periphery of a wafer placed on the susceptor during film deposition.
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Citations
11 Claims
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1. A method of film deposition comprising the steps of:
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placing a wafer on a susceptor positioned inside a wafer-handling chamber disposed under a reaction chamber included in a single-wafer-processing type CVD apparatus;
positioning the wafer inside the reaction chamber by raising the susceptor;
when the susceptor moves to the position, separating the reaction chamber and the wafer-handling chamber by making closely in contact a periphery of the susceptor and a circular separation plate disposed coaxially with the susceptor and between the reaction chamber and the wafer-handling chamber;
emitting a jet of reaction gas from a showerhead disposed inside the reaction chamber onto the wafer to be processed;
depositing a film on the wafer;
during the deposition, discharging an inert gas from the wafer-handling chamber to the reaction chamber through at least one gas discharge hole formed through the susceptor from its bottom to its top, and via a back side of the wafer placed on the susceptor and a periphery of the wafer;
evacuating the reaction chamber through an exhaust duct, which is positioned in the vicinity of the showerhead and is provided circularly along an inner wall of the reaction chamber; and
after the deposition, lowering the susceptor and moving the wafer to the wafer-handling chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method of film deposition comprising the steps of:
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placing a wafer on a susceptor positioned inside a wafer-handling chamber disposed under a reaction chamber included in a single-wafer-processing type CVD apparatus;
positioning the wafer inside the reaction chamber by raising the susceptor;
when the susceptor moves to the position, separating the reaction chamber and the wafer-handling chamber by making closely in contact a periphery of the susceptor and a circular separation plate disposed coaxially with the susceptor and between the reaction chamber and the wafer-handling chamber;
emitting a jet of reaction gas from a showerhead disposed inside the reaction chamber onto the wafer to be processed;
depositing a film on the wafer;
during the deposition, discharging an inert gas from the wafer-handling chamber to the reaction chamber through at least one gas discharge hole formed through the susceptor from its bottom to its top, and via a periphery of the wafer placed on the susceptor and a inner periphery of the circular separation plate;
evacuating the reaction chamber through an exhaust duct, which is positioned in the vicinity of the showerhead and is provided circularly along an inner wall of the reaction chamber; and
after the deposition, lowering the susceptor and moving the wafer to the wafer-handling chamber. - View Dependent Claims (11)
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Specification