METHOD FOR MANUFACTURING OPTICAL DISC MASTER AND METHOD FOR MANUFACTURING OPTICAL DISC

A method for manufacturing an optical disc master using an existing exposure system, and a method for manufacturing an optical disc having higher recording capacity. The method for manufacturing an optical disc, using a master to produce the optical disc having an irregular pattern thereon, the mast...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	ARATANI KATSUHISA, KOUCHIYAMA AKIRA
Format:	Patent
Sprache:	eng
Schlagworte:	APPARATUS SPECIALLY ADAPTED THEREFOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TO SURFACES, IN GENERAL CINEMATOGRAPHY ELECTROGRAPHY HOLOGRAPHY INFORMATION STORAGE INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORDCARRIER AND TRANSDUCER MATERIALS THEREFOR ORIGINALS THEREFOR PERFORMING OPERATIONS PHOTOGRAPHY PHOTOMECHANICAL PRODUCTION OF TEXTURED OR PATTERNED SURFACES,e.g. FOR PRINTING, FOR PROCESSING OF SEMICONDUCTORDEVICES PHYSICS PROCESSES FOR APPLYING LIQUIDS OR OTHER FLUENT MATERIALS TOSURFACES, IN GENERAL SPRAYING OR ATOMISING IN GENERAL TRANSPORTING
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Beschreibung
Zusammenfassung:	A method for manufacturing an optical disc master using an existing exposure system, and a method for manufacturing an optical disc having higher recording capacity. The method for manufacturing an optical disc, using a master to produce the optical disc having an irregular pattern thereon, the master being produced by the steps of forming a resist layer composed of a resist material including an incomplete oxide of a transition metal such as W or Mo on a substrate, the oxygen content of the incomplete oxide being smaller than the oxygen content of the stoichiometric composition corresponding to a valence of the transition metal; selectively exposing the resist layer with laser according to a recording signal pattern using a light source with an irradiation power that is less than an irradiation threshold power at which exposure of the resist starts; and developing the resist layer to form the predetermined irregular pattern.