Patent ID: 8592004

Claim:
A film deposition method in which a film is deposited on a surface of a substrate in strip form traveling on a peripheral surface of a cylindrical drum, in at least one film deposition compartment which contains a space defined by a peripheral surface of said drum, the method comprising the steps of: in a system with a differential compartment disposed between said at least one film deposition compartment and a compartment including a wrapping space, setting a first pressure of said wrapping space lower than a second pressure of said at least one film deposition compartment, said wrapping space containing at least one of a first position at which said substrate starts to travel on said drum and a second position at which said substrate separates from said drum, said differential compartment communicating with said compartment including the wrapping space and said at least one film deposition compartment; setting a third pressure of said differential compartment higher than the second pressure of said at least one film deposition compartment; and performing film deposition in said at least one film deposition compartment, with electric power supplied to said drum.