JPH01149238A - 光学的情報記録媒体 - Google Patents

光学的情報記録媒体

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Publication number
JPH01149238A
JPH01149238A JP62307867A JP30786787A JPH01149238A JP H01149238 A JPH01149238 A JP H01149238A JP 62307867 A JP62307867 A JP 62307867A JP 30786787 A JP30786787 A JP 30786787A JP H01149238 A JPH01149238 A JP H01149238A
Authority
JP
Japan
Prior art keywords
optical information
recording medium
information recording
light
absorption rate
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.)
Granted
Application number
JP62307867A
Other languages
English (en)
Other versions
JPH081707B2 (ja
Inventor
Noboru Yamada
昇 山田
Kenichi Osada
憲一 長田
Kenichi Nishiuchi
健一 西内
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
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 Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP62307867A priority Critical patent/JPH081707B2/ja
Priority to DE88120172T priority patent/DE3883174T2/de
Priority to EP88120172A priority patent/EP0319037B1/en
Publication of JPH01149238A publication Critical patent/JPH01149238A/ja
Priority to US07/997,640 priority patent/US5273861A/en
Priority to US08/115,645 priority patent/US5449589A/en
Publication of JPH081707B2 publication Critical patent/JPH081707B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
    • G11B7/0055—Erasing
    • G11B7/00557—Erasing involving phase-change media
    • 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
    • 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
    • G11B7/2433—Metals or elements of Groups 13, 14, 15 or 16 of the Periodic Table, e.g. B, Si, Ge, As, Sb, Bi, Se or Te
    • 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)
    • 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
    • G11B2007/24314—Metals or metalloids group 15 elements (e.g. Sb, Bi)
    • 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
    • G11B2007/24316—Metals or metalloids group 16 elements (i.e. chalcogenides, Se, Te)
    • 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
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
    • G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
    • G11B2007/25706—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing transition metal elements (Zn, Fe, Co, Ni, Pt)
    • 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
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/257—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
    • G11B2007/25705—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials
    • G11B2007/25716—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of inorganic materials containing sulfur
    • 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
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
    • G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
    • G11B7/2534—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins polycarbonates [PC]
    • 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
    • G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
    • G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
    • G11B7/2595—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers based on gold

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。

Description

【発明の詳細な説明】 産業上の利用分野 本発明は、レーザー光線等の手段を用いて情報信号を高
密度に記録することのできる光学的情報記録媒体、とり
わけ書き換え可能なタイプの光学的情報記録媒体に関す
るものである。
従来の技術 ガラス、樹脂等の表面の平滑な基板の上に光吸収性の薄
膜を形成Ｌ、その上に微小スポットに絞りこんだレーザ
ー光線を照射して照射部に局部的な変化を生じさせ、こ
れによって情報を記録するという技術は公知である。こ
の際、記録膜として例えばＴｅ、Ｓｅをベースとする或
種のカルコゲナイドガラス薄膜を用いることで情報の記
録、消去、書き換えを繰り返し行うことができる。記録
のメカニズムは結晶相とアモルファス相との間の原子レ
ベルでの可逆的構造変化に基づ（光学的な特性の違いを
利用するもので、特定の波長の光に対する反射光量、あ
るいは透過光量の差を信号として検出する。　記録膜層
は繰り返して使用するさいの蒸発等を避ける目的で５ｉ
ｎ２、ＺｎＳ等の誘電体層でサンドイッチするのが一般
的であって各層の厚さは光の吸収効率が高（なるように
、同時に変化前後における反射光量または透過光量の差
ができるだけ大きくなるように選ぶ。光の入射するのと
は反対の側の誘電体層の上に更にＡｕ、Ａ１等の光反射
層を追加して変化量を大きくした例もある。
発明が解決しようとする問題点 これまで、上述のいわゆる相変化型の書き換え可能な記
録媒体においては記録用と消去用とで別々のレーザービ
ームを用いて重ね書きくいわゆるオーバーライド）を行
ってきた。この場合には記録時と消去時とでレーザーパ
ワー、照射時間を独立に選ぶことが可能であり、重ね書
きによる特異な問題は生じていなかった。ところが最近
では一本のレーザービームだけで重ね書きする方法（い
わゆるダイレクト・オーバーライド）が提唱され、主流
となろうとしている。この方法は、レーザーパワーを記
録レベルと消去レベルの二段階として、この間で情報信
号に応じて変調Ｌ、信号の記録された情報トラック上に
、直接法の信号を書き込んでい（というものである。こ
れによれば光学ヘッドの設計が楽になるといったメリッ
トがある反面、以下のようなデメリットが生じる。すな
わち予め消去するという作業がなされないために、アモ
ルファスの部分に記録する（すなわち再度アモルファス
化する）場合と、結晶の部分に記録する場合とで次の記
録状態が異なるという点である。具体的には記録ビット
の大きさが微妙に変化Ｌ、これによって消去したはずの
前の信号成分が残るという問題が生じてきた。前記問題
は、以下の二つの点によって引き起こされるものと考え
られる。一つはアモルファスの部分と、結晶の部分とで
は光学的な吸収率が異なることであり、もう一つはアモ
ルファスの部分と、結晶の部分とでは融解のための必要
なエネルギー（潜熱）が異なることである。
問題点を解決するための手段 アモルファス状態のときと結晶状態のときとで光学的な
吸収率を等しくする、あるいは潜熱の差が大きいときに
は、むしろ結晶状態の方の光吸収率を相対的に高くする
。
作用 結晶状態における光吸収率をアモルファス状態における
光吸収率と同等、もしくは高（することで、いずれの部
分においてもほぼ同様な昇温プロファイルを得ることが
できビットの大きさを揃えることが可能となる。すなわ
ち高い消去率でオーバーライドが可能になる。
実施例 本発明の光学情報記録媒体は、第１図および第２図に示
すように、ＰＭＭＡ、ボ１ノカーボネイト等の樹脂、Ａ
Ｉ、Ｃｕ等の金属、ガラス等の表面の平滑な基板１の上
にＳｉＯ２、ＺｎＳ等の誘電体３でサンドイッチした記
録層２を形成して構成される。レーザー光線の入射する
側とは反対側の誘電体層の上に、更に光反射層４を設け
た構成もある。最上部に保護板を張り合わせることもで
きる。
本発明のポイントは、上記構成において、各層の膜厚を
適当に選び、記録前後の二つの状Ｍ（記録状態、消去状
態）における光吸収率を等しくする、または、むしろ相
対的に溶融しにくい状態のほうの光吸収率を相対的に高
くして、いずれの状態においても、時間的、空間的に同
様な昇温プロファイルを得ることにある。第１表中にダ
イナミックな測定を行った実施例の膜厚構成例を、第２
表に記録前後の光吸収率、反射率およびその記録消去特
性を示す。
各構成は以下のような特徴を有している。表中、Ｎｏ、
　１、Ｎｏ、　２、Ｎｏ、　３は記録層が４０ｎｍの場
合、また　Ｎｏ、４、Ｎｏ、　５、Ｎｏ、６　は記録層
が２０ｎｍの場合であって、　それぞれ順番にアモルフ
ァス部での光吸収率Ａａと結晶部での光吸収率Ａｂの関
係をそれぞれ、Ａａ　　＞　Ａｂ、　Ａａ　−Ａｂ、　
Ａａ　　＜　Ａｂ　　とした例である。
測定は１５ｍ／ｓｅｃの線速度で周波数７ＭＨｚ、５Ｍ
Ｈｚの、記録を交互にオーバーライドした。レーザーパ
ワーは記録パワーレベル（アモルファス化）１２〜２０
ｍＷ、消去パワーレベル（結晶化）５〜１０ｍＷ、で行
いこの範囲で最も良好な７ＭＨｚでのＣＮＲ１消去率の
値を表に掲げた。
第２表　各ディスクの特性比較 この表からアモルファス状態における光吸収率が結晶状
態における光吸収率よりも大きい場合にはＣＮＲは高い
が、十分な消去率が得られないこと、アモルファス状態
と結晶状態との光吸収率が同等か、もしくは結晶状態の
ほうが大きい場合には、高いＣＮＲと消去率を同時に得
ることができることが分かる。
発明の効果 本発明の光学的情報記録媒体によって、−本のレーザー
ビームによるオーバーライドを高いＣＮＲと、高い消去
率を維持したまま行うことが可能となった。
【図面の簡単な説明】
第１図および第２図は、本発明の実施例における光学的
情報記録媒体の断面図を示す。 １・・・・基板、２・・・・記録層、３・・・・誘電体
、４・・・・光反射層。 代理人の氏名　弁理士　中尾敏男　ばか１名第１図 第２図

Claims (3)

    【特許請求の範囲】
  1. （１）光線の照射条件に対応して光学的に検出可能な二
    つの状態間を可逆的に変化しうる記録層を備えた光学情
    報記録媒体において、上記記録層における二つの状態が
    上記照射光線の波長に対して等しい光吸収率を有するこ
    とを特徴とする光学的情報記録媒体。
  2. （２）光線の照射条件に対応して光学的に検出可能な二
    つの状態ａおよびｂの間を、可逆的に変化しうる記録層
    を備えた光学的情報記録媒体であって、上記二つの状態
    ａおよびｂをある一定の温度に昇温させるに必要な照射
    光量Ｌ、熱量ＥがＬａ≧ＬｂまたはＥａ≧Ｅｂ の関係にあるとき、照射光線の波長に対する上記二つの
    状態ａおよびｂにおける光吸収率ＡをＡａ≧Ａｂ としたことを特徴とする光学的情報記録媒体。
  3. （３）光線の照射条件に対応して、結晶相−アモルファ
    ス相間を可逆的に変化する記録層を備えた光学的情報記
    録媒体において、照射光線の波長に対応する光吸収率が
    、結晶相の部分においてアモルファス相の部分と同等ま
    たは相対的に大なることを特徴とする特許請求の範囲第
    ２項記載の光学的情報記録媒体。
JP62307867A 1987-12-04 1987-12-04 光学的情報記録媒体 Expired - Lifetime JPH081707B2 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP62307867A JPH081707B2 (ja) 1987-12-04 1987-12-04 光学的情報記録媒体
DE88120172T DE3883174T2 (de) 1987-12-04 1988-12-02 Optisches Informationsaufzeichnungsmedium.
EP88120172A EP0319037B1 (en) 1987-12-04 1988-12-02 Optical information recording medium
US07/997,640 US5273861A (en) 1987-12-04 1992-12-28 Optical information recording medium, method of making an optical information recording medium and method of recording/reproducing optical information
US08/115,645 US5449589A (en) 1987-12-04 1993-09-03 Method of making an optical information recording medium and method of recording/reproducing optical information

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62307867A JPH081707B2 (ja) 1987-12-04 1987-12-04 光学的情報記録媒体

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JPH01149238A true JPH01149238A (ja) 1989-06-12
JPH081707B2 JPH081707B2 (ja) 1996-01-10

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JP (1) JPH081707B2 (ja)
DE (1) DE3883174T2 (ja)

Cited By (13)

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Publication number Priority date Publication date Assignee Title
JPH025238A (ja) * 1988-06-24 1990-01-10 Hitachi Ltd 光記録媒体および光記録方法
JPH02128330A (ja) * 1988-11-08 1990-05-16 Fuji Electric Co Ltd 光記録媒体
JPH04212735A (ja) * 1990-03-14 1992-08-04 Matsushita Electric Ind Co Ltd 光学情報の記録方法
EP0630007A1 (en) * 1993-06-17 1994-12-21 Nec Corporation Optical information-recording medium
US5424106A (en) * 1992-04-17 1995-06-13 Matsushita Electric Industrial Co., Ltd. Optical information recording medium and method of designing its structure
JPH07320298A (ja) * 1994-05-20 1995-12-08 Nec Corp 相変化型光ディスク
JPH0863781A (ja) * 1994-08-29 1996-03-08 Nec Corp 相変化型光ディスク
JPH0877596A (ja) * 1994-08-31 1996-03-22 Nec Corp 光学情報記録媒体
US5527661A (en) * 1992-11-25 1996-06-18 Matsushita Electric Industrial Co., Ltd. Optical information recording medium
US5719006A (en) * 1994-10-19 1998-02-17 Nec Corporation Optical information recording medium
US6469977B2 (en) 1999-12-20 2002-10-22 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, method for producing the same, and method and apparatus for recording/reproducing information thereon
US6660356B1 (en) 1999-05-12 2003-12-09 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, method for producing the same, and method and apparatus for recording/reproducing information thereon
JP2008013321A (ja) * 2006-07-06 2008-01-24 Shimizu Corp 立て起こし装置

Families Citing this family (10)

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DE69030026T2 (de) * 1989-06-19 1997-09-18 Matsushita Electric Ind Co Ltd Optischer Informationsaufzeichnungsträger
US5191565A (en) * 1989-06-19 1993-03-02 Matsushita Electric Industrial Co., Ltd. Optical information recording medium
EP0405225A3 (en) * 1989-06-30 1992-02-26 Kabushiki Kaisha Toshiba Information storage medium
JPH03169683A (ja) * 1989-11-30 1991-07-23 Toshiba Corp 情報の記録及び消去方法
JPH03224791A (ja) * 1990-01-31 1991-10-03 Toshiba Corp 情報記録媒体
JP3080739B2 (ja) * 1991-12-20 2000-08-28 日本電気株式会社 光学的情報記録媒体および光学的情報記録消去再生方法
EP0564260B1 (en) * 1992-03-30 2000-09-06 Kabushiki Kaisha Toshiba Optical recording medium and optical recording/reproducing apparatus
EP1189212A3 (en) * 1995-03-28 2003-09-17 Toray Industries, Inc. Optical recording media and a method for recording on the optical recording media
EP0957477A3 (en) 1998-05-15 2003-11-05 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, recording and reproducing method therefor and optical information recording and reproduction apparatus
US7065035B1 (en) 1999-10-25 2006-06-20 Matsushita Electric Industrial Co., Ltd. Optical multilayer disk, multiwavelength light source, and optical system using them

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01100745A (ja) * 1987-10-13 1989-04-19 Toshiba Corp 情報記録媒体

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2148148B (en) * 1983-09-19 1988-01-13 Storage Technology Corp Optical storage medium and method for making same
CN1010519B (zh) * 1985-09-25 1990-11-21 松下电器产业株式会社 可逆的光学情报记录介质

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01100745A (ja) * 1987-10-13 1989-04-19 Toshiba Corp 情報記録媒体

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH025238A (ja) * 1988-06-24 1990-01-10 Hitachi Ltd 光記録媒体および光記録方法
JPH02128330A (ja) * 1988-11-08 1990-05-16 Fuji Electric Co Ltd 光記録媒体
JPH04212735A (ja) * 1990-03-14 1992-08-04 Matsushita Electric Ind Co Ltd 光学情報の記録方法
US5545454A (en) * 1992-04-17 1996-08-13 Matsushita Electric Industrial Inc., Ltd. Optical information recording medium and method of designing its structure
US5424106A (en) * 1992-04-17 1995-06-13 Matsushita Electric Industrial Co., Ltd. Optical information recording medium and method of designing its structure
US5527661A (en) * 1992-11-25 1996-06-18 Matsushita Electric Industrial Co., Ltd. Optical information recording medium
EP0630007A1 (en) * 1993-06-17 1994-12-21 Nec Corporation Optical information-recording medium
JPH0793804A (ja) * 1993-06-17 1995-04-07 Nec Corp 光学的情報記録媒体
US5506022A (en) * 1993-06-17 1996-04-09 Nec Corporation Optical information-recording medium
JPH07320298A (ja) * 1994-05-20 1995-12-08 Nec Corp 相変化型光ディスク
JPH0863781A (ja) * 1994-08-29 1996-03-08 Nec Corp 相変化型光ディスク
JPH0877596A (ja) * 1994-08-31 1996-03-22 Nec Corp 光学情報記録媒体
US5719006A (en) * 1994-10-19 1998-02-17 Nec Corporation Optical information recording medium
US5900347A (en) * 1994-10-19 1999-05-04 Nec Corporation Optical information recording medium
US6140011A (en) * 1994-10-19 2000-10-31 Nec Corporation Optical information recording medium
US6660356B1 (en) 1999-05-12 2003-12-09 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, method for producing the same, and method and apparatus for recording/reproducing information thereon
US6469977B2 (en) 1999-12-20 2002-10-22 Matsushita Electric Industrial Co., Ltd. Optical information recording medium, method for producing the same, and method and apparatus for recording/reproducing information thereon
JP2008013321A (ja) * 2006-07-06 2008-01-24 Shimizu Corp 立て起こし装置

Also Published As

Publication number Publication date
DE3883174T2 (de) 1994-03-10
EP0319037A3 (en) 1990-10-10
DE3883174D1 (de) 1993-09-16
JPH081707B2 (ja) 1996-01-10
EP0319037B1 (en) 1993-08-11
EP0319037A2 (en) 1989-06-07

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