# US 2008/0186840 A1 · Optical information recording medium > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2008/0186840 A1 - Document ID: US20080186840A1 - Status: Published application - Kind: A1 - Application number: 11/940,622 - Filed: 2007-11-15 - Published: 2008-08-07 - Earliest claimed: 2006-12-20 - Assignees: Sony Corporation - Inventors: Hiroshi UCHIYAMA; Hisayuki YAMATSU; Norihiro TANABE - Web page: https://patentgrep.com/patent/US20080186840A1 ## CPC - G11B 7/245: containing a polymeric component - G11B 7/24038: Multiple laminated recording layers - G11B 7/24044: for storing optical interference patterns, e.g. holograms; for storing data in three dimensions [3D], e.g. volume storage (G11B7/24038 takes precedence) - G11B 7/247: methine or polymethine dyes - G11B 7/2472: cyanine - G11B 7/2492: neutral compounds - G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R) ## Abstract An optical information recording medium, which is made of a resin provided with photoreactivity containing organometal compound, has a recording layer on which, after a photoreaction are brought about when predetermined initialization light is irradiated to the medium and then the resin is hardened, at a time of recording information, a recording mark is formed when predetermined recording light is condensed to the medium, and a temperature of the medium near a focal point of the recording light is increased and the organometal compound is transubstantiated, and at a time of reproducing information, the information is reproduced based on returned light according to predetermined reading light being irradiated. ## Claims ### Claim 1 An optical information recording medium made of a resin provided with photoreactivity containing organometal compound, which has a recording layer on which, after a photoreaction are brought about when predetermined initialization light is irradiated to the medium and then the resin is hardened, at a time of recording information, a recording mark is formed when predetermined recording light is condensed to the medium, and a temperature of the medium near a focal point of the recording light is increased and the organometal compound is transubstantiated, and at a time of reproducing information, the information is reproduced based on returned light according to predetermined reading light being irradiated. ### Claim 2 (depends on 1) The optical information recording medium according to claim 1, wherein, when the initialization light is irradiated, the recording layer become hardened through photoreaction, and the organometal compound thereof changes photochemically by the initialization light. ### Claim 3 (depends on 1) The optical information recording medium according to claim 1, wherein the organometal compound in the recording layer changes photochemically by the recording light. ### Claim 4 (depends on 1) The optical information recording medium according to claim 1, wherein at the time of recording information, the recording layer forms the recording mark by which a temperature of the medium near a focal point of the recording light is increased and the organometal compound is transubstantiated through photochemical reaction, thermochemical reaction, or the both reaction. ### Claim 5 (depends on 1) The optical information recording medium according to claim 1, wherein the recording layer forms the recording mark by which the organometal compound is transubstantiated into metal compound by the initialization light, at the time of recording information, a temperature of the medium near a focal point of the recording light is increased, and the metal compound is further transubstantiated through photochemical reaction or thermochemical reaction. ### Claim 6 (depends on 1) The optical information recording medium according to claim 1, wherein the recording layer forms the recording mark by which, at the time of recording information, a temperature of the medium near a focal point of the recording light is increased, and the organometal compound is precipitated by thermal diffusion or aggregation through photochemical reaction or thermochemical reaction. ### Claim 7 (depends on 1) The optical information recording medium according to claim 1, wherein the recording layer forms the recording mark by which the organometal compound is transubstantiated into metal compound by the initialization light, at the time of recording information, a temperature of the medium near a focal point of the recording light is increased, and the metal compound is precipitated by thermal diffusion or aggregation through photochemical reaction or thermochemical reaction. ### Claim 8 An optical information recording medium made of a resin provided with photoreactivity containing inorganic metal compound, which has a recording layer on which, after a photoreaction are brought about when predetermined initialization light is irradiated to the medium and then the resin is hardened, at a time of recording information, a recording mark is formed when predetermined recording light is condensed to the medium, and a temperature of the medium near a focal point of the recording light is increased and the inorganic metal compound is transubstantiated, and at a time of reproducing information, the information is reproduced based on returned light according to predetermined reading light being irradiated. ### Claim 9 (depends on 8) The optical information recording medium according to claim 8, wherein, when the initialization light is irradiated, the recording layer become hardened through photoreaction, and the inorganic metal compound thereof changes photochemically by the initialization light. ### Claim 10 (depends on 8) The optical information recording medium according to claim 8, wherein the inorganic metal compound in the recording layer changes photochemically by the recording light. ### Claim 11 (depends on 8) The optical information recording medium according to claim 8, wherein at the time of recording information, the recording layer forms the recording mark by which a temperature of the medium near a focal point of the recording light is increased and the inorganic metal compound is transubstantiated through photochemical reaction, thermochemical reaction, or the both reaction. ### Claim 12 (depends on 8) The optical information recording medium according to claim 8, wherein the recording layer forms the recording mark by which the inorganic metal compound is transubstantiated into metal compound by the initialization light, at the time of recording information, a temperature of the medium near a focal point of the recording light is increased, and the metal compound is further transubstantiated through photochemical reaction or thermochemical reaction. ### Claim 13 (depends on 8) The optical information recording medium according to claim 8, wherein the recording layer forms the recording mark by which, at the time of recording information, a temperature of the medium near a focal point of the recording light is increased, and the inorganic metal compound is precipitated by thermal diffusion or aggregation through photochemical reaction or thermochemical reaction. ### Claim 14 (depends on 8) The optical information recording medium according to claim 8, wherein the recording layer forms the recording mark by which the inorganic metal compound is transubstantiated into metal compound by the initialization light, at the time of recording information, a temperature of the medium near a focal point of the recording light is increased, and the metal compound is precipitated by thermal diffusion or aggregation through photochemical reaction or thermochemical reaction.