GB2110406B - Digital storage device - Google Patents

Digital storage device

Info

Publication number
GB2110406B
GB2110406B GB8231820A GB8231820A GB2110406B GB 2110406 B GB2110406 B GB 2110406B GB 8231820 A GB8231820 A GB 8231820A GB 8231820 A GB8231820 A GB 8231820A GB 2110406 B GB2110406 B GB 2110406B
Authority
GB
United Kingdom
Prior art keywords
storage device
digital storage
digital
storage
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB8231820A
Other versions
GB2110406A (en
Inventor
Anthony George Cullis
Hugh Charles Webber
Nigel Gordon Chew
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UK Secretary of State for Defence
Original Assignee
UK Secretary of State for Defence
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by UK Secretary of State for Defence filed Critical UK Secretary of State for Defence
Priority to GB8231820A priority Critical patent/GB2110406B/en
Publication of GB2110406A publication Critical patent/GB2110406A/en
Application granted granted Critical
Publication of GB2110406B publication Critical patent/GB2110406B/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/2407—Tracks or pits; Shape, structure or physical properties thereof
    • G11B7/24085—Pits
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0045—Recording
    • G11B7/00454—Recording involving phase-change effects
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers
    • G11B7/243—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of recording layers comprising inorganic materials only, e.g. ablative layers
    • G11B2007/24302—Metals or metalloids
    • G11B2007/24312—Metals or metalloids group 14 elements (e.g. Si, Ge, Sn)
GB8231820A 1981-11-10 1982-11-08 Digital storage device Expired GB2110406B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8231820A GB2110406B (en) 1981-11-10 1982-11-08 Digital storage device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8133925 1981-11-10
GB8231820A GB2110406B (en) 1981-11-10 1982-11-08 Digital storage device

Publications (2)

Publication Number Publication Date
GB2110406A GB2110406A (en) 1983-06-15
GB2110406B true GB2110406B (en) 1985-10-23

Family

ID=26281225

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8231820A Expired GB2110406B (en) 1981-11-10 1982-11-08 Digital storage device

Country Status (1)

Country Link
GB (1) GB2110406B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4719594A (en) * 1984-11-01 1988-01-12 Energy Conversion Devices, Inc. Grooved optical data storage device including a chalcogenide memory layer
JPH0777025B2 (en) * 1985-10-16 1995-08-16 株式会社日立製作所 Optical recording / reproducing device
US4970711A (en) * 1988-02-05 1990-11-13 Tandy Corporation Bulk eraser for optical memory media
EP0822543A1 (en) * 1996-07-30 1998-02-04 Industrial Technology Research Institute Write-once-read-many optical disk

Also Published As

Publication number Publication date
GB2110406A (en) 1983-06-15

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee