Single-substrate multi-layer optical disk for read-only storage and phase change rewritable storage
October 15, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod of recording and reproduction of information using a recording medium available for information overlap recording, a recording medium and a recording and reproducing apparatus using the method Method for recording and reproducing information on and from an optical disk having a read-only recorded zone and a writable and readable zone using a spot laser light Optical disk Method and apparatus for producing an optical disk having a read-only area and a rewritable area Multiple data surface optical data storage system Optical disk data storage system with multiple write-once dye-based data layers Patent #: 5627817 InventorsAssigneeApplicationNo. 732578 filed on 10/15/1996US Classes:369/275.1, Optical track structure (e.g., phase or diffracting structure, etc.)369/94Having layered storage mediumExaminersPrimary: Hindi, NabilAttorney, Agent or FirmForeign Patent References
International ClassG11B 007/24Foreign Application Priority Data1995-10-13 JPAbstractAn optical disk includes a transparent rigid substrate, a phase change rewritable optical recording medium formed on the transparent rigid substrate, a transparent spacer formed on the phase change rewritable optical recording medium and having a grooved surface for storing information, and a reflecting layer formed on the grooved surface of the transparent spacer. The grooved surface of the transparent spacer and the reflecting layer form a read-only recording medium.Other References
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