| 摘要 |
PURPOSE:To prevent injuries to the surface of at least disk substrates on which recording films are formed by forming fluoroplastic films on said surfaces. CONSTITUTION:The optical information recording disks 2, 2a are two sheets of the disk substrates constituting an optical information recording disk 1 and are provided with an inside peripheral spacer 4a integrally formed to a hub 4 provided to the inside peripheral part of the disk substrates of the recording films 3, 3a formed on one face thereof, an outside peripheral spacer 5 interposed to the outside peripheral part of the disk substrates, a space 6 formed between the recording films and the fluoroplastic films 7 formed on the outside surfaces of the disk substrates. The fluoroplastic for forming the fluoroplastic films 7 is most preferably a polytetrafluoroethylene and in addition, a polychlorotrifluoroethylene, polyvinylidene chloride, etc. or copolymer of these materials are usable. Since foreign matter is thereby automatically removed without contacting, the possibility of injuring the surfaces of the disk substrates eliminated. |
