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US 2006/0067202 A1Published application
Optical recording medium, its production method, and recording method of the optical recording medium
OwnerTohru Yashiroinventor
Life of this patent
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Abstract
A hybrid optical recording medium is provided with a ROM portion dedicated to reproduction and a recordable portion in which writing is possible. In one embodiment, a dual-layer optical recording medium is disclosed. First and second substrates form the dual-layer medium with an inorganic protective layer interposed therebetween.
Claims17
An optical recording medium comprising:
- a first transparent substrate;
- a second substrate including a ROM portion in which information is pre-recorded, and a writable portion previously provided with a guide groove;
- a reflective layer;
- an information recording layer including an organic dye;
- and
- an inorganic protective layer, each layer being formed in this order on the second substrate, and
- wherein the second substrate is bonded with the first transparent substrate, with a transparent organic interlayer, with the first transparent substrate and the second substrate facing outward, and
- wherein signal information formed on the information recording layer of the second substrate is capable of being recorded or reproduced by optical beam irradiation performed from the side of the first transparent substrate.
5 more elements
A recording method comprising the acts of:
- providing an optical recording medium, the medium comprising:
- a first transparent substrate;
- a second substrate including a ROM portion in which information is pre-recorded, and a writable portion previously provided with a guide groove;
- a reflective layer;
- an information recording layer including an organic dye;
- and
- an inorganic protective layer, each layer being formed in this order on the second substrate, and
- wherein the second substrate is bonded with the first transparent substrate, with a transparent organic interlayer, with the first transparent substrate and the second substrate facing outward, and
- wherein signal information formed on the information recording layer of the second substrate is recorded or reproduced by optical beam irradiation performed from the side of the first transparent substrate;
- and
- using ROM signal information formed in the second substrate to record a signal in the information recording layer of the second substrate.
8 more elements
A method of manufacturing an optical recording medium, comprising:
- forming a reflective layer, an information layer composed of an organic dye and an inorganic protective layer on a first substrate including a ROM portion in which information is pre-recorded and a writable portion previously provided with a guide groove;
- and
- bonding the first substrate to a second transparent substrate with an interposition of the transparent organic interlayer with the first substrate and the second transparent substrate facing outward.
An optical recording medium comprising:
- a first recording layer;
- a second recording layer;
- and
- an inorganic protective layer between the first and second recording layers, wherein at least one of the first and second recording layers includes a ROM portion and a writable portion.
1 more element
Dependencies are inferred from the claim text.