JPS5845634A - 情報記録媒体 - Google Patents

情報記録媒体

Info

Publication number
JPS5845634A
JPS5845634A JP56141550A JP14155081A JPS5845634A JP S5845634 A JPS5845634 A JP S5845634A JP 56141550 A JP56141550 A JP 56141550A JP 14155081 A JP14155081 A JP 14155081A JP S5845634 A JPS5845634 A JP S5845634A
Authority
JP
Japan
Prior art keywords
layer
tellurium
recording medium
information recording
information
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.)
Pending
Application number
JP56141550A
Other languages
English (en)
Inventor
Hironori Goto
後藤　広則
Yasuyuki Goto
康之 後藤
Nagaaki Etsuno
越野　長明
Seiya Ogawa
小川　清也
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.)
Fujitsu Ltd
Original Assignee
Fujitsu 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 Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP56141550A priority Critical patent/JPS5845634A/ja
Publication of JPS5845634A publication Critical patent/JPS5845634A/ja
Pending 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
    • G11B7/241—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
    • G11B7/252—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
    • G11B7/2578—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
    • 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
    • G11B2007/2571—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 group 14 elements except carbon (Si, Ge, Sn, Pb)
    • 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
    • G11B2007/25715—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 oxygen
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Inorganic Chemistry (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Optical Record Carriers And Manufacture Thereof (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】 本発明は光デイスク装置用の情報記録媒体に関する。
光デイスク装置は磁気ディスク装置に比し記憶容量およ
び価格の面において非常にすぐれておυ、画像処理シス
テムにおける画像情報ファイル装置及びオフィス・シス
テムにおける文書ファイル装置として注目されている記
録装置である。
これまでに各種の光デイスク装置の開発がおこなわれて
いるが、これらのうち、光を照射し熱により溶融または
蒸発させ孔を形成することによって情報を書込み、反射
光または透過光によシ穴の有無を検知することによって
情報を読取る方式（以下熱溶融式と称する）が最も期待
されている。
熱溶融式光デイスク装置の情報記録媒体（以下単に情報
記録媒体と称する）は、光の照射によって容易に孔を設
けることができることのほか、物理的化学的に安定であ
ること、特に耐食性のある合金等、耐食性を備える材料
を記録材料として用いる方法、もしくはテルルＴｅ、ビ
スマスＢｉ等を記録材料として用いその表面に一酸化シ
リコンＳｔＯ。
アルミナＡ４鵞Ｏｓ等の七１６クス保護膜を設ける方法
が用いられている。
これらのうち、ロジウムＲｈ、金Ａｕ等の金属は高価で
あるのみならず、熱によって穴を形成することが比較的
困難、すなわち情報書込み感度が低く、また合金は温度
上昇によって光の反射率、透過率あるいけ吸収率が変化
し、情報読取υにおけるＳＮ比及び感度が低下し易いと
いう欠点があんこのため、テルルＴｅ、ビスマスＢ１等
を記録材料として用い、その表面に無機保ｉＩΦ膜を設
ける方法が最も実用的である。またこれらのイ：４相は
、一般に、ガラスあるいはアクリル４む↑脂等の透明な
基板上に蒸着によって設けるのであるが、重し１及び破
損防１１−のためアクリル樹脂基板を用いる方が多いＯ ととるが、アクリル樹脂活版の上にテルルＴｅ。
ビスマスＢ１等の記録材料を蒸着し、更にその上に一酸
化シリコンｓｈｏ、アルミナＡ４２０３等の無機材料を
蒸着した記録媒体においては、構成するそれぞれの材料
の熱膨張係数が異なす、シかも一酸化シリコンＳ　ｉ　
Ｏ，アルミナＡｔ２０３等の無機材料は延性が低い。こ
のため、情報書込みにより温度の上昇が生じたとき、記
録材料は延性が高いので特に問題を生じないが、−酸化
シリコンＳｉＯやアルミナＡｔ２０３等はクランクを生
じたり、はく離したシ、おるいはｉ己録媒体全体に有無
な歪を生ずるという問題があった。
本発明は前記のような問題を解決するためになされたも
のであり、温度変化によってクラ、りを生じたり、はく
離したりあるいけ有害な歪を生じたりすることのない保
；１φ膜を備えた情報記録媒体を得ることを目的とする
。
すなわち、本づＩξ明は、基板の上に設けた記録材料と
、その保護膜として設けるセラミックス層との中間に組
成が連続的に変化するサーメツト層を設け、記録材料と
保護膜との間において材料の物理的性質が浄激に変化し
ないようにすることにより、保護膜の強度を向上するよ
うにしたものである０ 以下、図に示す実施例により、本発明の要旨の具体的々
説明を訃となう。
図において１はアクリル樹脂基板、２はテルルＴｅ層、
３はテルルＴｏと後記−酸化シリコンＳｌＯ上に２７５
Ａの厚さに蒸着され記録層を形成する。
３− サーメツト層３はテルルＴｅ層２の上に５ＯＡのメット
層３と一酸化シリコン８１０層はテルルＴｅ層２の保護
層を形成する。なお、サーメツト層３はテルルＴｅＪｍ
２を形成したあとテルルＴ、　ｅの蒸着量が次第に減少
し７てゼロになるように制御し、一方これと同時に一酸
化シリコンＳ１０の蒸着量をゼロから次第に増加するよ
うに制御することによって形成する。
このようにして構成された情報す目録媒体の情報書込み
感度及び情報読取り時のＣＮ比は、アクリル樹脂基板１
の上にテルルＴｅ層２のみを形成した場合とｔｙ　’、
’同じであった。従来の情報記録媒体、すなわちテルル
Ｔｅ層２の上に保噛層として一酸化シリコン８１０層４
を直接形成したものは、アクリル樹脂基板１の上にテル
ルＴ　ｅ　／ｌ＃　２のみを形成したものに比し、情報
書込み感度は１０チ以上、情報読取り時のＣＮ比は５ｄ
Ｂ以上の低下があったのに対し、本実施例においてはこ
のような低下は全＝４− く見られなかった。
一酸化シリコンＳ　ｉ　ＯＭ　４の温度上昇によるクラ
ック、はく離及び歪に関しては、相対湿度９０’％の室
内において６５℃を中心とし、１５℃の温度変化ｆ１０
００１０００時間て１日１ザイクルの割合でおこなった
結果、全く異状なかった。
記録材料としてテルルＴｅの代りにビスマス旧を用いた
場合においても同様な効果が得られた。
また、上記のような効果＆：ｊ：、−酸化シリコ＋ｉＯ
層４の厚さを非常に薄くした場合においてもほとんど変
化がなかった。
以−ト説明したように、本発明によれば温度変化によっ
て保護１漠にクラックを生じたり、はく離したり、記録
媒体全体に有害な歪を生じたりすることがなく、情報書
込み感度およびＣＮ比のすぐれた情報記録媒体を得ると
とができる。
【図面の簡単な説明】
図は本発明一実施例の構成を示し、図中、１はアクリル
樹脂基板、２はテルル１鴫　３はサーメット層、４は一
酸化シリコン１−を示す。

Claims (1)

    【特許請求の範囲】
  1. 情報の書込みにおいては光を照射し加熱することにより
    所要位置に穴を形成し、情報の読取りにおいては光を照
    射し所定位置の穴の有無を検知する情報記録媒体におい
    て、組成が連続的に変化するサーメツト層を介して該情
    報記録媒体表面にセラミックス層を設けたことを特徴と
    する情報記録媒体。
JP56141550A 1981-09-08 1981-09-08 情報記録媒体 Pending JPS5845634A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56141550A JPS5845634A (ja) 1981-09-08 1981-09-08 情報記録媒体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56141550A JPS5845634A (ja) 1981-09-08 1981-09-08 情報記録媒体

Publications (1)

Publication Number Publication Date
JPS5845634A true JPS5845634A (ja) 1983-03-16

Family

ID=15294566

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56141550A Pending JPS5845634A (ja) 1981-09-08 1981-09-08 情報記録媒体

Country Status (1)

Country Link
JP (1) JPS5845634A (ja)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597093A (ja) * 1982-07-06 1984-01-14 Sanyo Electric Co Ltd 光学記録媒体
JPS5990247A (ja) * 1982-11-12 1984-05-24 Sanyo Electric Co Ltd 光学記録媒体
JPS615451A (ja) * 1984-06-19 1986-01-11 Matsushita Electric Ind Co Ltd 情報記録担体
JPS61190733A (ja) * 1985-02-19 1986-08-25 Matsushita Electric Ind Co Ltd 情報記録媒体

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS597093A (ja) * 1982-07-06 1984-01-14 Sanyo Electric Co Ltd 光学記録媒体
JPH0376237B2 (ja) * 1982-07-06 1991-12-04 Sanyo Electric Co
JPS5990247A (ja) * 1982-11-12 1984-05-24 Sanyo Electric Co Ltd 光学記録媒体
JPH0376238B2 (ja) * 1982-11-12 1991-12-04 Sanyo Electric Co
JPS615451A (ja) * 1984-06-19 1986-01-11 Matsushita Electric Ind Co Ltd 情報記録担体
JPS61190733A (ja) * 1985-02-19 1986-08-25 Matsushita Electric Ind Co Ltd 情報記録媒体

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