Patent ID: 8721790

Claim:
A film deposition apparatus for depositing a film on a substrate by performing a cycle of alternately supplying at least two kinds of reaction gases that react with each other to the substrate to produce a layer of a reaction product, the film deposition apparatus comprising: a vacuum chamber including a ceiling portion; a turntable that is rotatably provided in the vacuum chamber and has on a first surface a substrate receiving area in which the substrate is placed; a first reaction gas nozzle with an ejection hole provided to extend along a radial direction of the turntable and to supply a first reaction gas to the first surface of the turntable and; a second reaction gas nozzle with an ejection hole provided to extend along the radial direction of the turntable away from the first reaction gas nozzle along a rotation direction of the turntable and to supply a second reaction gas to the first surface of the turntable; a separation gas nozzle with an ejection hole provided to extend along the radial direction of the turntable between the first reaction gas nozzle and the second reaction gas nozzle and to supply a separation gas that separates the first reaction gas and the second reaction gas, the separation gas nozzle providing a separation area between the first reaction gas nozzle and the second reaction gas nozzle; an evacuation port that evacuates the chamber; and a nozzle cover provided for the first reaction gas nozzle to create: a first space that is below the nozzle cover and that is between the nozzle cover and the turntable in which the ejection hole of the first reaction gas nozzle exists; and a second space that is above the first reaction gas nozzle and the nozzle cover and that is between the nozzle cover and the ceiling portion such that the separation gas from the separation gas area is impeded from flowing into the first space and the separation gas is likely to flow through the second space rather than the first space.