JPS6192448A - 光情報記録媒体 - Google Patents

光情報記録媒体

Info

Publication number
JPS6192448A
JPS6192448A JP59213002A JP21300284A JPS6192448A JP S6192448 A JPS6192448 A JP S6192448A JP 59213002 A JP59213002 A JP 59213002A JP 21300284 A JP21300284 A JP 21300284A JP S6192448 A JPS6192448 A JP S6192448A
Authority
JP
Japan
Prior art keywords
film
recording
base body
thin
thin film
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
JP59213002A
Other languages
English (en)
Inventor
Teruo Kobayashi
輝夫 小林
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.)
Nippon Columbia Co Ltd
Original Assignee
Nippon Columbia 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 Nippon Columbia Co Ltd filed Critical Nippon Columbia Co Ltd
Priority to JP59213002A priority Critical patent/JPS6192448A/ja
Publication of JPS6192448A publication Critical patent/JPS6192448A/ja
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record 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
    • G11B7/257Record 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242Record 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
    • G11B7/243Record 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
    • G11B2007/24302Metals or metalloids
    • G11B2007/24312Metals or metalloids group 14 elements (e.g. Si, Ge, Sn)
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/242Record 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
    • G11B7/243Record 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
    • G11B2007/24302Metals or metalloids
    • G11B2007/24316Metals or metalloids group 16 elements (i.e. chalcogenides, Se, Te)
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record 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
    • G11B7/257Record 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
    • G11B2007/25705Record 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
    • G11B2007/2571Record 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)
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record 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
    • G11B7/257Record 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
    • G11B2007/25705Record 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
    • G11B2007/25715Record 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
    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B7/00Recording 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
    • G11B7/24Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/241Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
    • G11B7/252Record 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
    • G11B7/253Record 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
    • G11B7/2533Record 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

  • 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】 (産業上の利用分野) 不発明は元ビーム會用いてi′#報が記録され4元情報
記録媒体に関し、特に信号を忠実に記録再生すとことが
でさ;L 16I#記録媒体に関するものであえ0 (従来の技011) 元1g報記4媒体において、記録4楔に元ビームを照射
すえことによシ、記録簿、膜全備成すと材料に対して、
非晶質−結晶質転移によふ反射率変化を生起せしめ、情
報を記録する方法が知られてぃ4oこの様な記録材料と
しては三七レン化アンチモンSb、5slI、三テルル
化アンチモンSb 、Te 、が知られており、ざらに
不出願人はテルル化ゲルマニウムGeTe薄膜をq#願
昭59−13745号にて提案し・た0 (発明が解決しようとすえ間4点) か\ふ元情報配録媒体に元ビームを照射し情報全記録す
る時、元ビーム照射部の記録薄膜の?1度が上昇し、非
晶質−結晶質転移が起こり情報が記録されるが、この記
録薄膜が非晶質から、債品質に転移すえと体積の収縮が
雇え。タリえばGeTeK訃いては9%の体積放少があ
4o−刃元ビーム照射全党けて温度上昇した記録薄膜に
接している基体は、記録薄膜からの熱拡散により温度上
昇し該基体の線熱膨張率(プラスチック材料で通常1×
10−“程力、)に応じて膨張す石。このLうにして元
ビームが照射さ九f1!報が記録さオ14ビット部位で
tよ、基体が膨張し記録薄膜が収縮すえため、記録薄膜
にりラックが発生し、情報を忠実に記録再生す2ことが
できないという欠点があった。
(間頂点を解決す4次めの手段) 不発明は非晶質−結晶質転移により清報を記録すえツL
1・H報記碌媒体の上述の如き欠点を解消し、情報全忠
実に記録再生すえことのでき4元情報記゛録媒体ヲ瑳供
す4ことを目的とすえもので、その特徴は、基体上に線
膨張率がI X 10 ’ 10C以下でろと材料から
なる薄膜全積層し該薄膜上に記録薄膜を形成す4ことに
あ10 (実施例〕 以下不発明を実施例に従って、?f=細に説明す4゜第
1図は不発明による光i′#報記録媒体の一実施例で1
1はポリメチルメタクリレート基体、12は二酸化シリ
コンStow #膜、13 ij GeTe記8iW膜
であ4゜ここで使用きれる基体は公知の材料であえポリ
メチルメタクリレート、ポリカーボネート、ポリエステ
ル、ポリ塩化ビニル及びポリスルホン等あ合成樹脂、f
りといはガラス及びアルミ等の金属音用いえことができ
、記@再生用元ビームに対し透明であっても不透明であ
っても良い。12はSiO,+薄膜であC14〜5 X
 10−’/ ’ Cの線熱影5長率をもつ溶融シリカ
を電子ビーム族Mhoいはスパッタリングによって基体
上に彼着嘔せ2゜膜厚は0.2μm〜2μmであり0.
3μm〜1μmが符に望−ましい。
以上の様に不実施例においてはポリメチルメタクリレー
ト基体上に5toc#mが板沼妊れてい4ので元ビーム
照射部の記録薄膜の温度が上昇しても、基体への熱拡散
は低く抑えらn=体の膨張?防ぐことができえ。lたS
in、薄膜は温度上昇はあっても1%l膨張率が小さい
ため膨張は小さい。このようにして元ビーム照射によっ
て情報が記録され2ピット部位のGeTek録の非晶質
−結晶質転移によ石収縮が起きても、基体及び基体記録
薄膜間に設けられた低線熱膨張率の′#膜の膨張は低く
抑制され芝ので、ビット部位におけ2記録薄良にクシツ
クに発生せf、情報の忠実な記録再生ができZ0第2図
にポリメチルメタクリレート基板上に直接GeTe記録
薄膜を被層させた比較用の記録媒体と不実施例によと記
録媒体とに、それぞハ半導体し−ザー元を用いて配;景
再生した時の記録レーザーパワーと再生出力の関係を示
す。点線21は比較用の記a媒体の出力信号波形であり
、芙琢22は本実施例の記録媒体の出力信号波形でろえ
。低線熱膨張率7琢膜の層を持たない記録媒体において
は、点a21の様に、記録レーザーパワーが3mW以上
において記碌薄、模のピット品にクラックが発生し、再
生出方、′波形が乱れているが、不実施例の記録媒体で
は実”線22の様にレーザーパワーが7mWにおいても
再生出力信号波形に乱1がなく1#報を忠実に記録再生
していることがわがえ。不実施例において用いたSin
、薄膜は町祝、近赤外元に対し透明であ4ので基体11
仰jから元ビーム會照射し清報を記録再生ずとこともで
き2利息があえ。不実施例において勝浦膨張系数の小さ
い材料としてSiO,k)fJいたが不発明の池の実適
例として)3熱膨張率が1×10C工り不ざい拐゛科、
例えばケイ素St、ゲルマニウムGe−,(i化アルミ
ニウムkl、O,、=ッヶルm、硫化カドウムミCdS
 、タングステンW1モリブデンMo等を用い、真空蒸
漸、スパッタリング、4鋳、陽極酸化など公知の技術で
基体上に薄膜化することもでき石。これらの中でSt、
%GeXkl工01は線熱膨張率がSin、に次いで小
さく熱伝導率も小さいので記録媒体の記骨感度を高くず
4点においても望ましい。
ルTe光吸収薄膜、34ViSb工Se、記録薄膜であ
え。
以上の構成からGe薄膜層を取シ除い次従来の記録媒体
においては、5mW以上の記録レーザーパワーの時に再
生出力信号波形に乱れがあったが、不実施例の如(Ge
@膜層を設は友記録媒体においては、記録レーザーパワ
ーが7mWの時も再生出力信号波形に乱れはなく情報の
忠実な記録再生が行われた。以上の実施例で記録薄膜1
3又Fi34の外側にさらに保護膜を設けてもよいこと
はもち論であZoこの場合保護膜にはクラック防止の役
目?兼ねさせえ必要がないので、比鮫的薄いものでょい
0 (発明の効果) 以上詳述したように、基体と該橋体上に形成された記録
薄膜を有し、該記録1W膜に元ビームを照射し、aピ録
材料の非晶質−結晶質転移によ4反射率変化によって情
報を記録す、i6i情報Ke頷媒体に2いて、2に1+
上に線熱膨張率が1×10C以下である材料の薄膜を積
層し該薄膜上に記録薄膜?)し成し友こと7を荷積とす
え元IH報記録媒体は、基体の諸影づ長と七11にもと
づくa己録テ導、I稟のクラックを防止し、忠実な情報
の記録再生?することができと。
【図面の簡単な説明】

Claims (1)

    【特許請求の範囲】
  1. 基体と該基体上に形成された記録薄膜を有し、該記録薄
    膜に光ビームを照射し、記録薄膜材料の非晶質−結晶質
    転移による反射率変化によつて情報を記録する光情報記
    録媒体において、基体上に線熱膨張率が1×10^−^
    5/℃以下である材料の薄膜を積層し該薄膜上に記録薄
    膜を形成したことを特徴とする光情報記録媒体。
JP59213002A 1984-10-11 1984-10-11 光情報記録媒体 Pending JPS6192448A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59213002A JPS6192448A (ja) 1984-10-11 1984-10-11 光情報記録媒体

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59213002A JPS6192448A (ja) 1984-10-11 1984-10-11 光情報記録媒体

Publications (1)

Publication Number Publication Date
JPS6192448A true JPS6192448A (ja) 1986-05-10

Family

ID=16631854

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59213002A Pending JPS6192448A (ja) 1984-10-11 1984-10-11 光情報記録媒体

Country Status (1)

Country Link
JP (1) JPS6192448A (ja)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02195538A (ja) * 1989-01-23 1990-08-02 Matsushita Electric Ind Co Ltd 光学情報記録再生消去部材
US5191565A (en) * 1989-06-19 1993-03-02 Matsushita Electric Industrial Co., Ltd. Optical information recording medium

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5548836A (en) * 1978-09-30 1980-04-08 Pioneer Electronic Corp Signal recording board and recording and reproducing method
JPS5778649A (en) * 1980-10-30 1982-05-17 Teijin Ltd Laminated material for optical memory
JPS5912431A (ja) * 1982-07-13 1984-01-23 Konishiroku Photo Ind Co Ltd カラ−熱拡散転写方法
JPS6038746A (ja) * 1983-08-10 1985-02-28 Matsushita Electric Ind Co Ltd 光ディスク
JPS60155495A (ja) * 1984-01-26 1985-08-15 Sony Corp 光学情報記録媒体

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5548836A (en) * 1978-09-30 1980-04-08 Pioneer Electronic Corp Signal recording board and recording and reproducing method
JPS5778649A (en) * 1980-10-30 1982-05-17 Teijin Ltd Laminated material for optical memory
JPS5912431A (ja) * 1982-07-13 1984-01-23 Konishiroku Photo Ind Co Ltd カラ−熱拡散転写方法
JPS6038746A (ja) * 1983-08-10 1985-02-28 Matsushita Electric Ind Co Ltd 光ディスク
JPS60155495A (ja) * 1984-01-26 1985-08-15 Sony Corp 光学情報記録媒体

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02195538A (ja) * 1989-01-23 1990-08-02 Matsushita Electric Ind Co Ltd 光学情報記録再生消去部材
US5191565A (en) * 1989-06-19 1993-03-02 Matsushita Electric Industrial Co., Ltd. Optical information recording medium

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