Electron beam irradiation apparatus, electron beam irradiation method, and apparatus for and method of manufacturing disc-shaped object

An apparatus for manufacturing a disc-shaped object, comprising:

• an electron beam irradiation apparatus including a first rotational unit provided in an openable/closable shield container and accommodating a disc-shaped object rotationally driven, and an electron beam irradiation unit for irradiating the surface of said on-rotating disc-shaped object with electron beams;
• a chamber including a second rotational unit capable of accommodating said disc-shaped object and an exchange chamber that is air-tightly closable and openable/closable independently of said shield container;
• and
• a rotational unit for exchanging said first and second rotational units with each other by rotating said first rotational unit in said shield container and said second rotational unit in said exchange chamber,
• wherein said electron beam irradiation unit and said disc-shaped object are relatively moved when irradiating said on-rotating disc-shaped object with the electron beams.