The Furukawa Electric Co., Ltd.

Atsushi Hiraizumi

Hiroyuki Abe

Koji Masuda

Tetsuro Wada

Kazuyou Mizuno

Koichi Shintomi

A thin film deposition method for producing an optical film with an optical characteristic on a deposition substrate in a vacuum chamber is provided. The method may include preparing in the vacuum chamber a deposition source which is a source of the film producing material; holding the deposition substrate with a substrate holding member; arranging the deposition substrate and the deposition source such that, given that a vertical distance from the center of the deposition substrate to the deposition source is defined as ZK and a horizontal distance between the deposition substrate and the deposition source as Xk, Xk/Zk is set to satisfy a following equation 0.48&#x2266;Xk/Zk&#x2266;0.78; rotating the deposition substrate on a rotational axis which is orthogonal to the deposition substrate; and evaporating the film producing material of the deposition source to perform deposition on the deposition substrate.

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Tokyo, Japan

Atsushi Hiraizumi