JPS61115252A - 情報記録媒体 - Google Patents

情報記録媒体

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Publication number
JPS61115252A
JPS61115252A JP59234953A JP23495384A JPS61115252A JP S61115252 A JPS61115252 A JP S61115252A JP 59234953 A JP59234953 A JP 59234953A JP 23495384 A JP23495384 A JP 23495384A JP S61115252 A JPS61115252 A JP S61115252A
Authority
JP
Japan
Prior art keywords
film
layer
information recording
reflectance
recording
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
JP59234953A
Other languages
English (en)
Other versions
JPH0619856B2 (ja
Inventor
Masaharu Ishigaki
正治 石垣
Satoru Oishi
哲 大石
Nobuhiro Tokujiyuku
徳宿　伸弘
Yoshie Kodera
小寺　喜衛
Yukio Fukui
幸夫 福井
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP23495384A priority Critical patent/JPH0619856B2/ja
Priority to US06/795,453 priority patent/US4645712A/en
Priority to DE19853539351 priority patent/DE3539351A1/de
Publication of JPS61115252A publication Critical patent/JPS61115252A/ja
Publication of JPH0619856B2 publication Critical patent/JPH0619856B2/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
    • G11B7/24—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
    • 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
    • G11B7/254—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 protective topcoat layers
    • G11B7/2548—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 protective topcoat 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
    • G11B2007/24314—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)
    • 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
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/913—Material designed to be responsive to temperature, light, moisture
    • 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
    • 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
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers
    • Y10T428/31699—Ester, halide or nitrile of addition polymer

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】 〔発明の利用分野〕 本発明は光学式の反射型ビデオディスク、デジタルディ
スク、コンビ、−タメモｙ用グイスク等に係シ、特に、
任意の情報をディスクに書き込むのに好適な情報記録媒
体に関する。
〔発明の背景〕
レーザ光の照射により情報の誉き込み、および読み出し
が可能な情報記録媒体として、情報記録を光学的特性、
例えば反射率、透過率、屈折率等の変化として記録する
方法が提案されている。その中でも特開昭５７−１５９
６９２号、特開昭５７−１８６２４５号に記載のように
、レーザ光に対して光吸収性が曳く光を熱ＫＲ換する効
果を有する光吸収層（光反射層としても働く］と加熱に
より光学特性が変化する相転移層の２層膜−、よル記録
膜を構成した情報記録媒体は感度が高く高密度記録が可
能である。しかし、記録膜を２層膜構造とする場合、記
録膜の反射率は２層膜を構成する２つの膜の光干渉によ
って決まシ、特に反射層となる光吸収層（比べ相転移層
の厚さのわずかな変動が記録膜全体の反射率を大幅に変
化させ、光デイスク製造時の記録膜形成歩留りが低くな
るという点については配意されていなかった。
〔発明の目的〕
本発明の目的は、高記録感度、高密度記録が可能で、か
つ記録膜の作製歩留）が高い情報記録媒体を提供するこ
とにある。
〔発明の概要〕
本発明は、基板上に第１の高透過率の情報記碌層と第２
の高光反射率層の２層膜からなる記録膜を育し、上記２
層膜の光干渉効果を用いて書き込み前の反射率を所望の
値に下げることＫよシ書き込み前後の反射率変化比を大
ヨくシた情報記録媒体釦おいて、上記光干渉効果により
得られる第１の情報記碌層の膜厚に対する反射率極小値
が所望の反射率とほぼ一致するように、上記高光透過率
の情報記碌層の光学特性を調整することＫよ）、記録膜
形成時の膜厚変動による記ｆ＆膜の反射率変化を最小く
したことを特徴とする。高光透過率の情報記鎌層の光学
特性なＮ＊する方法としては、特に記録光に対して光吸
収性のある金属元素、例えばＢＬ　、　Ｔ４．　Ｉ％　
、　Ｇ４　。
Ｓ＝、　’ｒ＝、　ｚ４．Ｈ２４，Ｓ？Ｌ、　Ｃ２Ａ５
ｔ−、Ａｙ、　Ｚ７Ｌ、　Ｐ４．　Ｔａ　等ヲ上記情報
記録層に少量含有させる方法を用いるものが有効でるる
。
〔発明の実施例〕
以下、本発明を実施例を用いて詳細に説明する。
実施例を 本発Ｆ！Ａにおける情報記録媒体の補数を第１図に示す
。まず、本発明との比較のため忙、次の構成の情報記録
媒体を考えてみる。すなわち、第１図に示すように、光
透過性のガクス基板あるいはアクリル樹脂等の樹脂基板
１上に、書き込み光、例えば波長８３０鵬鵬の半導体レ
ーザ光Ｋ　　　′対してその光吸収率が小さく（高光透
過性の）、主として熱によってその反射率、透過率等の
光学特性が変化するミセレノ化アンチモン５ｂ２Ｓｅｓ
蒸着膜よ構成る第１の層（相転移層）２を被着し、この
上く書き込み光に対して光吸収率が高いテレルＴ４蒸着
膜よ〕成るオニの層（光吸収かつ反射層）を被着するこ
とによ〕情報記録媒体を得る。この時のＴ、層の厚さは
４ＯＯ！であり、基板１を通して見た時の記録膜の反射
率は、５ｂ２８θ層の膜厚に対して第２図のようになる
。第２図において、曲線４は記録前、曲線５は記録後の
反射率を示す。記録膜厚１０００Ａ以上では記録感度が
悪いため、記録前後の反射率変化比が大きく取れる５ｂ
ｚＳｅｓ膜厚の範囲、４００〜６００人が実用可能域で
ある。しかし、情報記録媒体として実用に供する為には
、記録前の反射率が８％以上でなければ、記録面に対し
て良好釦記録光を集光することができず、一方、記録特
性からは、反射率変化比を大きくとる必要があるため記
録前の反射率はでよるだけ小さい方が良い。この為、一
般には、記録前の反射率を８〜１６チの範囲で設定し、
その設定値に対する変動幅を±２０チとじている。従っ
て、記録前の反射率許容値を１０±２％とすると、第２
図に示すように、Ｓｂ２５６ｍの膜厚許容値は５５０−
ｔｈ−１５Ｘとな９、通常の膜厚コントロールでは十分
な歩留９を得ることができない。
これに対し、本発明では、第１図に示す第１の層５ｂｘ
Ｓｅｓ膜を形成する際＜、半導体レーデ光の吸収性が高
いビスマス（ＢｊＩ）を８ｂ２Ｓｅｓと同時に蒸着し、
８１３ｔ８ｅｓとＢＬの原子比率が５％となるよ５に５
ｂｘＳｅｓ　ＢｊＸ中ＫＢ↓を混入させた。その後、先
の例と同様に第２０層Ｔｅ膜を蒸着法で４００人の厚さ
く形成した。この時の基板１側から見た記録膜反射率と
５ｂｚＳｅｓ（ＢＬ）膜厚との関係を第５図に示す。曲
ａ６及び７は、それぞれ記録前および記録後の反射率で
ある。第３図に示すごとに、８ｂｘＳｅｓ　ｙｉ　Ｋ　
ＢＬを５原子チ混入すると、５ｂｚＳｅｓ膜の複素屈折
率が五８−↓α１から＆８−↓α６に変化し、２層膜の
干渉効果によってできる反射率の極小値が第２因の４優
から８チへと増大して所望の反射率とほぼ一致するよう
忙なシ、目標反射″４１０±２％に対し、Ｅ３ｂ２Ｓｅ
ｓ膜厚の許容値はＳＯＯ±１００Ｘとなシ、従来に比べ
大幅に許容値が拡大される。従って、本発明によフ、記
録膜形成時の歩留りを大幅に向上でよる。また、この時
の反射率変化比は第５図に示すごとに、２〜５倍とれ記
録特性も充分確保できることがわかる。
実施例２ 実施例１で述べたＴｅ　Ｋかえて、　Ｂ＝を第２の１忙
用いた場合について述べる。この場合のＢｂ膜厚は５０
０人であり、第１のＦ３ｂｚ８ｅｓ層の光学特性を改善
する物質としては、実施例１と同様ＫＢＡを用い、員度
を５原子俤とする。この時の、反射率と５ｂ２Ｓｅｊ（
ＢＡ　）膜厚の関係を第４図に示す。
曲Ｍ　１０，１１は記録前、曲線１２は記録後の反射率
でるり５ｌＲ１ｄ１１および１２は本発明忙よるもので
あり、薦腋１０は８ｂｚＳｅｓ膜中にＢふが混入してい
ないものである。第４図でわかるように、５ｂｚｆ３ｅ
ｓ膜の複素屈Ｆｒ率をＢｂを混入させることＫよシ、五
Ｂ−ＬＣＬＩから五ｆ３−ｉ−α６に菱化させることＫ
よシ、記録前の反射″４極小値は８チとなり１目標反射
率１０±２チ忙対して、第１のＳｂ２ｇｅｉ層の厚さ許
容値は４００±８ＯＡとなり、ＢＬを混入しないものに
比べ大幅に許容値が拡大されることがわかる。また、本
実施例で述べた、５ｂｚ８ｅｉ（ＢＡ）の第１層とＢＬ
の第２層を用いる場合には、記録時（７）７１０熱によ
り　、ＢｂｚＳｅｓとＢｉ、ｇ）１ａ互拡散が起こ〕、
第４図に示すごとに、大きな反射率変化が生じ、極めて
良好な記録再生特性を得ることができる。
実施例＆ 実施例１で述べたＴｅにかえてＭを第２層に用いた場合
について述べる。この場合１．直は記録光に対する光吸
収率がＢｂ　、　’ｒｅよシ小さに、熱伝導率が大きい
為、ＡＪＩｇ厚を２０ＯＡとし、一方、第１の８ｂｘＳ
ｅｓ層のＢＬ混入量を１０〜１５％とし、その膜厚を５
０ＯＡとすることＫよ°９、第２図に示すと同様忙、記
録前の反射率極小値を８〜１６慢の間に設定することが
できた。これＫよＦ）　、５ｂｘＳｅｓ層の膜厚許容値
５００±８０Ａｆｔ得ておシ、通常の蒸　　　１着膜厚
コントロール法によル管理可能な値となった。
以上の実施例では、第１の層としてＳｂ２５ｇｇ膜を用
いた場合について述べたが、５ｂｘＳｅｓの組成は化学
量論的な値だけでな（，８ｂおよびＳｅの厘子比率がそ
れぞれ２０〜６０チ、および４０〜８０チの範囲で実用
となる。またｓ　５ｂ２ＳｅｓのｆｆＨｃも、８４、　
ＴＡ、　Ｉ？Ｌ、　Ｓｂ等の化合物、Ｔｅ１ｅｘ、　５
ｂｚＴｅｉ。
１−８４．　ＩｙｕＴ−ｓ、　Ｉｎ２Ｅ３匂等を用いる
ことができる。
更に、第１の層の光学特性を調整する為の物質としては
、ＢＬの他に、Ｔ、、Ｉ−か、５＝、’［’↓、Ｚ４゜
Ｈｆ、　Ｓｎ、　Ｃ＊、　ＡＭ、　ＡＩ、　ｚＸ、　Ｐ
４．　Ｔａ　’ＩＦ　＋７）　金ＪＩ７Ｃ素ヲ用いるこ
とがでよ、そして、第２の層としては、光吸収率の大き
いＢｉｔ　、　ＴＡ、の他に、Ｊ、ｉ、　Ｃ４，ＴＡ　
。
ＮＡ、Ａ１＆、ＡＰ、Ｃｍ、Ｈ２４，Ｚ４．Ｓａ、Ｚｚ
　等ｃＱ金ｉ４ｍヲ用いても本発明の効果を得られる。
また、上記５Ａ施例では、記録再生の場合忙ついて述べ
たが、第１の層が消去可能な記録膜である場合について
も本発明が適用でよ、同様の効果を有することも明らか
であろう。
〔発明の効果〕
以上のごとに、本発明によれば、情報記録媒体の記録属
形成釦おける製造歩留シな大幅に向上することができ、
光ディスクのコスト低減に多大の効果がある。
【図面の簡単な説明】
第１図は、本発明による情報記録媒体の断面図、第２図
は本発明の前提となる情報記録媒体による第１の層の膜
厚と反射率の関係を示す図、第５図は本発明によるオー
の実施例における第１の層の膜厚と反射率の関係を示す
因、第４図は第２の実施例における第１の層の膜厚と反
射率の関係を示す図である。 １・・・基板、 ２・−相転移層、 ３・−光吸収層。 第　１　口 第　２０ Ｓ　ｂ２Ｓｅ３　ｆＩｇ（Ａ’　） 第３１！１ 、！ｂｚｓｔＪＩ’１４（Ａ） ？７４圀 ５Ｈｓ幻ＩＩＩＬシ（Ａ）

Claims (1)

  1. 【特許請求の範囲】 １、基板上に、書き込み光に対して高光透過率の情報記
    録層と高光反射率層の２層膜からなる記録膜を有し、上
    記２層膜の光干渉効果を用いて書き込み前の反射率を所
    望の値に設定することにより、書き込み前後の反射率変
    化比を大きくした情報記録媒体において、上記光干渉効
    果により得られる上記情報記録層の膜厚に対する反射率
    極小値が、所望の反射率とほぼ一致するように、上記情
    報記録層の光学特性を調整したことを特徴とする情報記
    録媒体。 ２、上記情報記録層がＳｅ、Ｔｅ、Ｉｎ、Ｓｂ等の化合
    物がらなり、該化合物に上記情報記録層の光学特性を調
    整する物質を含有させたことを特徴とする特許請求の範
    囲第１項記載の情報記録媒体。 ３、上記含有物質がＢｉであることを特徴とする特許請
    求の範囲第２項記載の情報記録媒体。
JP23495384A 1984-11-09 1984-11-09 情報記録媒体 Expired - Lifetime JPH0619856B2 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP23495384A JPH0619856B2 (ja) 1984-11-09 1984-11-09 情報記録媒体
US06/795,453 US4645712A (en) 1984-11-09 1985-11-06 Information recording medium
DE19853539351 DE3539351A1 (de) 1984-11-09 1985-11-06 Informationsaufzeichnungstraeger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP23495384A JPH0619856B2 (ja) 1984-11-09 1984-11-09 情報記録媒体

Publications (2)

Publication Number Publication Date
JPS61115252A true JPS61115252A (ja) 1986-06-02
JPH0619856B2 JPH0619856B2 (ja) 1994-03-16

Family

ID=16978843

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Application Number Title Priority Date Filing Date
JP23495384A Expired - Lifetime JPH0619856B2 (ja) 1984-11-09 1984-11-09 情報記録媒体

Country Status (3)

Country Link
US (1) US4645712A (ja)
JP (1) JPH0619856B2 (ja)
DE (1) DE3539351A1 (ja)

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JPH06223405A (ja) * 1992-12-03 1994-08-12 Hitachi Ltd 情報記録媒体およびこれを用いた情報記録再生システム
US10020423B2 (en) 2009-06-26 2018-07-10 University Of Surrey Light emitting semiconductor device

Also Published As

Publication number Publication date
DE3539351A1 (de) 1986-05-22
JPH0619856B2 (ja) 1994-03-16
US4645712A (en) 1987-02-24

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