JPH0695388B2 - 情報記録媒体 - Google Patents

情報記録媒体

Info

Publication number
JPH0695388B2
JPH0695388B2 JP60129603A JP12960385A JPH0695388B2 JP H0695388 B2 JPH0695388 B2 JP H0695388B2 JP 60129603 A JP60129603 A JP 60129603A JP 12960385 A JP12960385 A JP 12960385A JP H0695388 B2 JPH0695388 B2 JP H0695388B2
Authority
JP
Japan
Prior art keywords
recording
film
barrier layer
plasma
recording medium
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 - Lifetime
Application number
JP60129603A
Other languages
English (en)
Other versions
JPS61289553A (ja
Inventor
秀樹 大川
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Priority to JP60129603A priority Critical patent/JPH0695388B2/ja
Priority to DE3619601A priority patent/DE3619601C2/de
Priority to US06/873,981 priority patent/US4772897A/en
Publication of JPS61289553A publication Critical patent/JPS61289553A/ja
Publication of JPH0695388B2 publication Critical patent/JPH0695388B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • 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
    • G11B2007/24306—Metals or metalloids transition metal elements of groups 3-10
    • 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
    • G11B2007/24308—Metals or metalloids transition metal elements of group 11 (Cu, Ag, Au)
    • 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
    • G11B2007/2431—Metals or metalloids group 13 elements (B, Al, Ga, In)
    • 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
    • G11B2007/24316—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
    • G11B2007/25715—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
    • 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
    • G11B7/256—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 improving adhesion between layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S430/00—Radiation imagery chemistry: process, composition, or product thereof
    • Y10S430/146—Laser beam

Description

【発明の詳細な説明】 ［発明の技術分野］ 本発明は、支持基体上に積層された記録膜を局部的に混
合あるいは合金化することにより、情報の記録を行う情
報記録媒体に関する。
［発明の技術的背景とその問題点］ 近年大容量の記録媒体として光ディスクが使用されてい
るが、その一つとして支持基体に積層させた２層の記録
膜を局部的に混合あるいは合金化することにより情報の
書込みを行なうようにした光ディスクが提案されている
（特願昭59−14058）。
第２図は、このような光ディスクの構造を概略的に示す
断面図である。
この光ディスクは、支持基板１上に、Al、Au、Pb、Sn、
Te等の金属薄膜２を形成し、さらにこの上に金属薄膜２
とは異なる透明材質、たとえばGe、Si等の半導体薄膜３
を形成した構造となっている。
そして、この光ディスクは、その半導体薄膜３にレーザ
光４の細いビームを照射して金属薄膜２に熱エネルギー
を与え、両者を溶融させることにより行なわれる。
レーザ光４の照射された半導体薄膜３の表面には、第３
図および第４図に示すように両層の材料が混合あるいは
合金化した記録部位５が形成され、この記録部位５の光
学的性質は記録が行なわれなかった部位の光学的性質と
は明確に異なっているので、この光学的性質の相違を利
用して情報の読取りを行うことができる。
しかしながらこのような光ディスクでは、常温において
も拡散効果により両層の材質の混合化が進んで金属薄膜
２と半導体薄膜３との境界面の光学的性質が変化するた
め、長期間の書込み特性の維持あるいは書込み後の保存
に耐えないという問題があった。
［発明の目的］ 本発明は上記の事情に基づいてなされたもので、長期に
わたる書込み特性の維持および書込み後の保存を可能と
した上記の光学的記録方式による情報記録媒体を提供し
ようとするものである。
［発明の概要］ すなわち本発明は上記目的を達成するために、支持基体
と、この支持基体上に積層形成され、炭素を含む材料を
プラズマ重合させたプラズマ重合膜からなる透明なアン
ダーコート層と、このアンダーコート層上に積層された
第１の記録膜と、この第１の記録膜上に積層され、炭素
を含む材料をプラズマ重合させたプラズマ重合膜からな
る透明なバリア層と、このバリア層上に積層され、前記
第１の記録膜とは異なる材質の第２の記録膜とから構成
され、これら第１および第２の記録膜が局部的に照光さ
れることにより混合あるいは合金化し情報が記録され
る。
［発明の実施例］ 以下本発明を図面を参照しながら説明する。
第１図は本発明の一実施例を示す断面図である。
この実施例の情報記録媒体は、PMMA（ポリメチルメタク
リレート）よりなる透明な基板１上に、密着性を向上さ
せるために、メタンガスをプラズマ重合させたプラズマ
重合膜よりなる透明なアンダーコート層６が形成されて
いる。そしてこの上に厚さ200〜400Å程度のAl、Au、P
b、Sn、Te等の金属薄膜２が付着され、さらにその上に
厚さ30〜100Åのメタンガスをプラズマ重合させたプラ
ズマ重合膜からなる透明なバリヤ層７と、厚さ200〜300
ÅのGe、Si等の半導体薄膜３が順に形成されている。８
は、半導体薄膜３上に形成されたアセチルセルロースよ
りなるオーバーコート層である。透明なバリヤ層７の厚
さが10Åより薄いとバリヤ層としての効果が少なく、逆
に100Åを越えると情報の書込みのために高エネルギー
のレーザビームが必要にあるので上記範囲がこのまし
い。なお、上記の透明なバリヤ層７は、金属薄膜２の酸
化物層、特に陽極酸化による酸化物層を用いることもで
きる。
この光ディスクは、その半導体薄膜３にレーザ光４の細
いビームを照射すると、半導体薄膜２および透明なバリ
ヤ層７を透過して金属薄膜２に熱エネルギーが与えら
れ、これらの層が溶融あるいは拡散して半導体薄膜と金
属薄膜の混合が行なわれる。
したがったレーザ光４の照射された半導体薄膜３の表面
には、第３図および第４図に示したように両層の材料が
混合あるいは合金化した記録部位５が形成され、この記
録部位５の光学的性質は記録が行なわれなかった部位の
光学的性質とは明確に異なっているので、この光学的性
質の相違を利用して情報の読取りを行うことができる。
またレーザ光が照射されない状態においては、バリヤ層
が金属薄膜層と半導体層間の拡散を阻害するので、情報
記録媒体の保存寿命を長くし、書き込み特性を長期間維
持することができる。
なお以上の実施例では、記録膜として金属薄膜と半導体
薄膜とを用いた例について説明したが、本発明はこのよ
うな実施例に限定されるものではなく、半導体薄膜に代
えて異種の金属薄膜を用いることも可能である。
また以上の実施例では、レーザ光を半導体薄膜側から照
射したが、本発明はこのような実施例に限定されるもの
ではなく、基板側から入射してもよい。
［発明の効果］ 以上説明したように、本発明においては異なる材質の記
録膜の局部的な混合あるいは合金化によって記録を行う
情報記録媒体において、これらの層間に常温において両
層が拡散するのを阻害するバリヤ層を設けて常温におけ
る両層間の拡散を防止したので、情報記録媒体の保存寿
命を長くし、書き込み特性を長期間維持することができ
る。
【図面の簡単な説明】
第１図は本発明の一実施例を示す断面図、第２図ないし
第４図は従来の情報記録媒体の記録原理を示す断面図お
よび平面図である。 １……支持基体 ２、３……記録膜 ７……バリヤ層

Claims (3)

    【特許請求の範囲】
  1. 【請求項１】支持基体と、 この支持基体上に積層形成され、炭素を含む材料をプラ
    ズマ重合させたプラズマ重合膜からなる透明なアンダー
    コート層と、 このアンダーコート層上に積層された第１の記録膜と、 この第１の記録膜上に積層され、炭素を含む材料をプラ
    ズマ重合させたプラズマ重合膜からなる透明なバリア層
    と、 このバリア層上に積層され、前記第１の記録膜とは異な
    る材質の第２の記録膜とから構成され、 これら第１および第２の記録膜が局部的に照光されるこ
    とにより混合あるいは合金化し情報が記録される情報記
    録媒体。
  2. 【請求項２】前記バリア層が、30〜100Åの厚さであっ
    て、情報記録時に加えられる外部エネルギーにより破壊
    されるものである特許請求の範囲第１項記載の情報記録
    媒体。
  3. 【請求項３】前記バリア層が、記録膜の表面に形成され
    た酸化膜である特許請求の範囲第１項記載の情報記録媒
    体。
JP60129603A 1985-06-14 1985-06-14 情報記録媒体 Expired - Lifetime JPH0695388B2 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP60129603A JPH0695388B2 (ja) 1985-06-14 1985-06-14 情報記録媒体
DE3619601A DE3619601C2 (de) 1985-06-14 1986-06-11 Optisches Aufzeichnungsmittel
US06/873,981 US4772897A (en) 1985-06-14 1986-06-13 Optical recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60129603A JPH0695388B2 (ja) 1985-06-14 1985-06-14 情報記録媒体

Publications (2)

Publication Number Publication Date
JPS61289553A JPS61289553A (ja) 1986-12-19
JPH0695388B2 true JPH0695388B2 (ja) 1994-11-24

Family

ID=15013539

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60129603A Expired - Lifetime JPH0695388B2 (ja) 1985-06-14 1985-06-14 情報記録媒体

Country Status (3)

Country Link
US (1) US4772897A (ja)
JP (1) JPH0695388B2 (ja)
DE (1) DE3619601C2 (ja)

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07118096B2 (ja) * 1987-01-29 1995-12-18 松下電器産業株式会社 光学情報記録担体
DE4005315A1 (de) * 1989-02-22 1990-08-23 Toshiba Kawasaki Kk Optisches informationsaufzeichnungsmedium
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US4772897A (en) 1988-09-20
JPS61289553A (ja) 1986-12-19
DE3619601C2 (de) 1994-03-10
DE3619601A1 (de) 1986-12-18

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