Abstract: An organic molecular film forming apparatus 100 of forming an organic molecular film on a processing target object includes a processing chamber 11 that accommodates therein the processing target object; an organic material gas supplying unit 2 that supplies an organic material gas into the processing chamber 11; and an ultraviolet ray irradiating unit 13 that irradiates ultraviolet ray to at least one of the processing target object, the organic material gas supplied to the processing target object, and a film formed on a surface of the processing target object. At least one of the surface of the processing target object and the organic molecular film formed thereon is activated by irradiating the ultraviolet ray from the ultraviolet ray irradiating unit 13 to at least one of the processing target object, the organic material gas supplied to the processing target object, and the film formed on the processing target object.

Abstract: A protective coating made of resin, preferably a radiation curable resin containing fluoroplastic fine particles having a low surface energy is provided in the form of the uppermost layer facing a magnetic head, thereby improving the frictional properties and durability of a magneto-optical disc that is used with a magnetic field modulation system in which the magnetic head comes in constant contact therewith.

Abstract: An optical recording disk includes a resin substrate having a recording layer thereon and a protective glass substrate, which are joined into an integral disk such that the recording layer is inside. The resin substrate is formed of a resin composition comprising a specific cyclic polyolefin and an optional alkyl phenol condensate. The resulting lightweight, rigid disk is adapted for recording/reproducing operation at high rotational speeds with few focusing errors due to minimized axial runouts.

Abstract: An optical recording disk is constructed using a substrate which is injection molded from a mixture of a cyclic polyolefin and up to 2% by weight of an alkyl phenol condensate. A recording layer remains firmly adhered to the substrate even in a hot humid environment.