JPS60230891A - Optical information-recording medium - Google Patents

Optical information-recording medium

Info

Publication number
JPS60230891A
JPS60230891A JP59086217A JP8621784A JPS60230891A JP S60230891 A JPS60230891 A JP S60230891A JP 59086217 A JP59086217 A JP 59086217A JP 8621784 A JP8621784 A JP 8621784A JP S60230891 A JPS60230891 A JP S60230891A
Authority
JP
Japan
Prior art keywords
recording layer
coloring matter
optical information
thin film
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.)
Pending
Application number
JP59086217A
Other languages
Japanese (ja)
Inventor
Hideaki Oba
大庭　秀章
Tsutomu Sato
勉 佐藤
Masaaki Umehara
正彬 梅原
Michiharu Abe
通治 安倍
Yutaka Ueda
裕 上田
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.)
Ricoh Co Ltd
Original Assignee
Ricoh 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 Ricoh Co Ltd filed Critical Ricoh Co Ltd
Priority to JP59086217A priority Critical patent/JPS60230891A/en
Publication of JPS60230891A publication Critical patent/JPS60230891A/en
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
    • G11B7/244—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 organic materials only
    • G11B7/246—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 organic materials only containing dyes
    • G11B7/247—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 organic materials only containing dyes methine or polymethine dyes
    • G11B7/2472—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 organic materials only containing dyes methine or polymethine dyes cyanine

Abstract

PURPOSE:To enable a coloring matter thin film recording layer to be provided without producing adverse effects on an injection-molded substrate, by using a specified compound as a coloring matter in a coloring matter thin film recording layer of an optical information-recording medium. CONSTITUTION:A compound of the formula, wherein R is subst. or unsubst. alkyl, alkoxyl, aralkyl or alkenyl, X is halogen atom, Y<-> is subst. or unsubst. benzensulfonate, p-toluenesulfonate, methylsulfate, ethylsulfate, benzenecarboxylate, methylcarboxylate or trifuluoromethylcarboxylate, and n is an integer of 0-3, is used as a coloring matter in the coloring matter thin film recording layer of the optical information-recording medium, whereby a recording material can be obtained which is stable to heat, is relatively inexpensive, and can be applied to an injection-molded substrate without any problem. The recording layer can be generally provided by coating according to the usual method. When the recording layer is thinner, sensitivity is better, but reflectance is lower, and accordingly, a preferable thickness of the layer is generally about 10-100nm.

Description

【発明の詳細な説明】 〔技術分野〕 本発明は特定のシアニン色素を含む色素薄膜を有する光
学的情報記録媒体に関する。さらに詳しくは、レーザビ
ームにより直接記録し反射光の変化によって情報再生を
行なう方法に用いられる光学的情報記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an optical information recording medium having a dye thin film containing a specific cyanine dye. More specifically, the present invention relates to an optical information recording medium used in a method of directly recording with a laser beam and reproducing information by changing reflected light.

〔従来技術〕[Prior art]

従来、色素薄膜を記録層として適用した光学的情報記録
媒体は知られている（例えば特開昭５６−１６９４８号
公報）。すなわち、この種の光学的メモリ媒体は基板と
色素薄膜記録層との間に金属反射膜を設け、記録層の側
から記録層の光吸収率が極大を示す波長のレーザビーム
を集光照射して情報を記録再生するものである。Conventionally, optical information recording media to which a dye thin film is applied as a recording layer are known (for example, Japanese Patent Laid-Open No. 16948/1983). In other words, in this type of optical memory medium, a metal reflective film is provided between the substrate and the dye thin film recording layer, and a laser beam of a wavelength at which the light absorption rate of the recording layer is at its maximum is focused and irradiated from the recording layer side. It is used to record and reproduce information.

しかしながら、一般にかかる色素を使用した光記録材料
は保存性（耐熱性、耐光性）カニ悪（且つ退色しやすい
という問題があった。そこで、本発明者等は先にピロー
ル系のシアニン色素を使用することならびに１−メチル
−２−［７−（１−メチル−６，３−ジメチル−５−〕
１０−２−インドリニリデン）　−１，３，５−へブタ
トリエニル）　−３，３−ジメチル−５−ノ・ローイン
ド１）ラムパーフロレートを使用することを提案したが
前者は耐熱性および耐光性が若干不足しそして後者は保
存性が改良されるが強い溶媒を必要とするので射出成形
基板に塗布すると基板に悪影響を与えるという問題があ
った。However, optical recording materials using such dyes generally have problems with poor storage stability (heat resistance, light resistance), and easy discoloration.Therefore, the present inventors first used a pyrrole-based cyanine dye. and 1-methyl-2-[7-(1-methyl-6,3-dimethyl-5-]
10-2-indolinylidene) -1,3,5-hebutatrienyl) -3,3-dimethyl-5-no rhoindo 1) It was proposed to use lamperfluorate, but the former has poor heat and light resistance. Although the latter improves storage stability, it requires a strong solvent, so there is a problem that when applied to an injection molded substrate, it adversely affects the substrate.

〔目　的〕〔the purpose〕

本発明は上記問題に鑑みてなされたものであって、その
目的は熱に対して安定でありし力・も比較的安価な射出
成形基板に問題な（塗布可肯目な記録材料を提供するこ
とＫある。The present invention has been made in view of the above-mentioned problems, and its purpose is to provide a recording material that is stable against heat and has problems with relatively inexpensive injection molded substrates. There is a thing called K.

上記目的を達成するために、本発明は光学的情報記録媒
体の色素薄膜記録層における色素として特定の構造を有
する化合物を使用することにある。すなわち、本発明の
色素は構造式（式中、Ｒは置換または未置換アルキル基
、アルコキシ基、アラルキル基またはアルケニル基を表
わし、Ｘは・・ロゲン原子を表わし、ρは置換または未
置換ベンゼンスルホネート、パラトルエンスルホネート
、メチルスルフェート、エチルスルフェート、ベンゼン
カルボキシレート、メチルカルボキシレートまたはトリ
フルオロメチルカルボキシレートを表わしそしてｎは０
〜６の整数を表わす）で表わされる。Ｒに対するアルキ
ル基の置換基としてはベンゼン核上にアルキル、ヒドロ
キシル、アルコキシ、アセチル、カルボキシル、ハロゲ
ン、アリール、アリル、ヒドロキシアルキル、ハロゲノ
アルキルなどが存在する基をあげることができる。本発
明の色素ではカウンターイオンＹ○として上記のものを
選択したためアルコールなどの射出成形基板に影響しな
い比較的弱い溶媒にもよ（溶解する。In order to achieve the above object, the present invention consists in using a compound having a specific structure as a dye in a dye thin film recording layer of an optical information recording medium. That is, the dye of the present invention has the structural formula (wherein R represents a substituted or unsubstituted alkyl group, alkoxy group, aralkyl group, or alkenyl group, X represents...a rogen atom, and ρ represents a substituted or unsubstituted benzene sulfonate. , p-toluenesulfonate, methylsulfate, ethylsulfate, benzenecarboxylate, methylcarboxylate or trifluoromethylcarboxylate, and n is 0
(representing an integer between 6 and 6). Examples of the substituent of the alkyl group for R include groups in which alkyl, hydroxyl, alkoxy, acetyl, carboxyl, halogen, aryl, allyl, hydroxyalkyl, halogenoalkyl, etc. are present on the benzene nucleus. In the dye of the present invention, since the above-mentioned counter ion Y is selected, it can be dissolved in a relatively weak solvent such as alcohol that does not affect the injection molded substrate.

したがって、本発明によれば射出成形基板に悪影響を与
えずに色素薄膜記録層を形成することができる。Therefore, according to the present invention, a dye thin film recording layer can be formed without adversely affecting the injection molded substrate.

本発明の光学的情報記録媒体は基本的には基板と色素薄
膜記録層とから構成される。必要に応じてさらに下引層
、保繰層などを設けることもできる。また、記録層同士
を内側にして２枚の記録媒体を対向させたいわゆるエア
ーサンドイッチ構造にすることも可能である。The optical information recording medium of the present invention basically comprises a substrate and a dye thin film recording layer. If necessary, a subbing layer, a retention layer, etc. can be further provided. It is also possible to form a so-called air sandwich structure in which two recording media are placed facing each other with their recording layers facing each other.

本発明における記録層を塗布によって形成させるには一
般に常法にしたがって塗設すればよく、その厚さは薄い
ほど感度がよ（なるが反射率も低下していくため一般に
１０〜１００　ｎｍ程度が好ましい。また、色素単独で
記録層を形成するときには蒸着、スパッタリングなどに
よってもよい。なお、このような記録層には、上記構造
式を有する色素の他にバインダー、金属遷移錯体、各攬
可塑剤、安定剤、界面活性剤、帯電防止剤、滑剤、難燃
剤、分散剤などの第３成分を含有させることもできる。To form the recording layer in the present invention by coating, it is generally necessary to apply the coating according to a conventional method, and the thinner the thickness, the better the sensitivity (although the reflectance also decreases, so the thickness is generally about 10 to 100 nm). Preferably.Also, when forming a recording layer using a dye alone, vapor deposition, sputtering, etc. may be used.In addition to the dye having the above structural formula, such a recording layer may also contain a binder, a metal transition complex, and various plasticizers. A third component such as a stabilizer, a surfactant, an antistatic agent, a lubricant, a flame retardant, a dispersant, etc. can also be included.

また、塗布に用いる溶媒としては例えばメタノール、エ
タノール、ジクロルエタンなどに加えて他のアルコール
系およびハロゲン化アルキル系、ケトン系、エーテル系
などを用いればよい。このような記録層を設ける基体の
材質には特に制限はな（各種プラスチック、ガラスなど
を用いることができる。Further, as the solvent used for coating, in addition to methanol, ethanol, dichloroethane, etc., other alcohols, halogenated alkyls, ketones, ethers, etc. may be used. There are no particular limitations on the material of the substrate on which such a recording layer is provided (various plastics, glass, etc. can be used).

情報の記録はレーザ光をレンズにより集光し記録層上に
微細な穴（ビット）を形成することによりなされ、読出
しは微弱なレーザ光を照射しビット部とそれ以外の部分
の反射率の差を利用して行なうことができる。Information is recorded by focusing laser light with a lens to form minute holes (bits) on the recording layer, and reading is performed by irradiating weak laser light and detecting the difference in reflectance between the bit area and other areas. This can be done using.

〔実施例〕〔Example〕

以下に比較例と共に実施例を掲げて本発明をさらに説明
するが本発明はこれに限定されるものではない。The present invention will be further explained below with reference to Examples along with Comparative Examples, but the present invention is not limited thereto.

アクリル樹脂を射出成形することにより炸裂された案内
溝付基板に、以下の表に構造式で示した色素または他の
成分との組合せを使用しその１．２重量％を適当な溶媒
に溶解させた溶液を回転塗布し乾燥させて膜厚４８ｎｍ
の記録層を得た。A substrate with guide grooves that has been exploded by injection molding acrylic resin is used with the dye shown in the structural formula in the table below or in combination with other components, and 1.2% by weight thereof is dissolved in an appropriate solvent. Spin coat the solution and dry it to a film thickness of 48 nm.
A recording layer was obtained.

こうして得られた記録媒体に波長７９　Ｄ　ｎｍの半導
体レーザな用い、照射面パワー３．５　ｍＷ　、ビーム
径１．５μｍに、線速１．２ｍ／ｓｅｃでＱ、　７　Ｍ
Ｈｚの信号を記録した。この記録部に０．３ｍＷのレー
ザ光をあて信号を再生したところ、５７ｄＢのＣ’／Ｎ
が得られた（　ＩＦバンド幅３０　ＫＨｚ　）。また７
、　３　Ｖｐ−ｐのトラッキングエラー信号が得られた
。A semiconductor laser with a wavelength of 79 D nm was used for the recording medium obtained in this way, and the irradiation surface power was 3.5 mW, the beam diameter was 1.5 μm, and the linear velocity was 1.2 m/sec, Q, 7 M.
A signal in Hz was recorded. When this recording section was irradiated with a 0.3 mW laser beam and the signal was reproduced, the C'/N was 57 dB.
was obtained (IF bandwidth 30 KHz). Also 7
, 3 Vp-p tracking error signals were obtained.

この記録媒体を１００℃のオーブン中に保存し、透過率
の変化により熱による退色の速度を調べた。その結果を
以下の表にまとめて示す。This recording medium was stored in an oven at 100° C., and the rate of discoloration due to heat was examined based on changes in transmittance. The results are summarized in the table below.

例　色　素　溶 タノー エラー エラー エラー エラー エラー ル　５７　Ｌ　７：３　１．０ ル　５６　Ｌ　７．４　１．０ ル　５８　Ｌ　７．６　１．２ ル　５６Ｌ　７．１　１．０ ル“　５６　Ｌ　７．２　１．１ ル　５７　Ｈ６，６１，２ 例　色　素　溶　媒 ジクロルエ 比較例２　同　上　、７ 備考：表中、レーザの項のｒＬＪは半導体レーザな意味
しモしてｒＨＪ５５　Ｌ　７．１　０．８ ５５　Ｌ　７．０　１．１ ５６　Ｌ　７．０　０．７ ４８　Ｌ　４．２　０．９ ５ＯＬ　２．５　０，９ ５５　Ｌ　７．１　１５．６ ５６　Ｌ　６．８　２α４ はＨｅ−Ｎｅレーザを意味する。Example Color Pigment Melter No Error Error Error Error 57 L 7:3 1.0 56 L 7.4 1.0 58 L 7.6 1.2 56L 7.1 1.0 56 L 7. 2 1.1 L 57 H6,61,2 Example Dye Solvent Dichlore Comparative Example 2 Same as above, 7 Note: In the table, rLJ in the laser section means a semiconductor laser, and rHJ55 L 7.1 0. 8 55 L 7.0 1.1 56 L 7.0 0.7 48 L 4.2 0.9 5OL 2.5 0.9 55 L 7.1 15.6 56 L 6.8 2α4 is He-Ne means laser.

〔効　果〕〔effect〕

本発明の色素を含む記録材料は熱に対して安定であり且
つ比較的安価な射出成形基板に問題な（塗布することが
できる。The recording materials containing the dyes of the invention are thermally stable and can be applied to relatively inexpensive injection molded substrates.

特許出願人　株式会社　リ　コ　− 代理人　弁理土山下　白Patent applicant Rico Co., Ltd. Agent: Patent attorney Shiro Tsuchiyamashita

Claims (1)

【特許請求の範囲】 基板上に色素として構造式 （式中、Ｒは置換または未置換アルキル基、アルコキシ
基、アラルキル基またはアルケニル基を表わ肱　ｘは・
・ロゲン原子を表わし、ｐは置換マたは未置換ベンゼン
スルホネート、パラトルエンスルホネート、メチルスル
フェート、エチルスルフェート、ベンゼンカルボキシレ
ート、メチルカルボキシレートまたはトリフルオロメチ
ルカルボキシレートを表わしそしてｎは０〜６の整数を
表わす）の化合物を含む色素薄膜記録層を有することを
特徴とする、光学的情報記録媒体。[Scope of Claims] As a dye on a substrate, a structural formula (wherein R represents a substituted or unsubstituted alkyl group, alkoxy group, aralkyl group, or alkenyl group;
・Represents a rogene atom, p represents substituted or unsubstituted benzenesulfonate, paratoluenesulfonate, methylsulfate, ethylsulfate, benzenecarboxylate, methylcarboxylate or trifluoromethylcarboxylate, and n is 0 to 6 An optical information recording medium comprising a dye thin film recording layer containing a compound (representing an integer of ).
JP59086217A 1984-05-01 1984-05-01 Optical information-recording medium Pending JPS60230891A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59086217A JPS60230891A (en) 1984-05-01 1984-05-01 Optical information-recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59086217A JPS60230891A (en) 1984-05-01 1984-05-01 Optical information-recording medium

Publications (1)

Publication Number Publication Date
JPS60230891A true JPS60230891A (en) 1985-11-16

Family

ID=13880610

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59086217A Pending JPS60230891A (en) 1984-05-01 1984-05-01 Optical information-recording medium

Country Status (1)

Country Link
JP (1) JPS60230891A (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4735839A (en) * 1985-07-10 1988-04-05 Ricoh Co., Ltd. Optical information recording medium
JPS63307985A (en) * 1987-06-09 1988-12-15 Fuji Photo Film Co Ltd Optical data recording medium
JPS6440385A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440384A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440381A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440390A (en) * 1987-08-06 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440388A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium for compact disc
JPS6440383A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440387A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440389A (en) * 1987-08-06 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440386A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6449682A (en) * 1987-08-20 1989-02-27 Fuji Photo Film Co Ltd Optical information recording medium
JPH022065A (en) * 1988-06-14 1990-01-08 Fuji Photo Film Co Ltd Optical data recording medium and preparation thereof
JPH0245191A (en) * 1988-08-05 1990-02-15 Adeka Argus Chem Co Ltd Optical recording material
JPH03203690A (en) * 1989-12-29 1991-09-05 Pioneer Electron Corp Optical recording medium
JPH03203692A (en) * 1989-12-29 1991-09-05 Pioneer Electron Corp Optical recording medium

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836490A (en) * 1981-07-24 1983-03-03 Ricoh Co Ltd Optical information recording medium
JPS58114989A (en) * 1982-12-06 1983-07-08 Ricoh Co Ltd Light information recording member
JPS5924692A (en) * 1982-07-30 1984-02-08 Tdk Corp Optical recording medium
JPS5955794A (en) * 1982-09-25 1984-03-30 Tdk Corp Optical recording medium
JPS5955795A (en) * 1982-09-27 1984-03-30 Tdk Corp Optical recording medium
JPS5967092A (en) * 1982-10-11 1984-04-16 Tdk Corp Optical recording medium
JPS5971895A (en) * 1982-10-18 1984-04-23 Tdk Corp Optical recording medium
JPS5985791A (en) * 1982-11-08 1984-05-17 Ricoh Co Ltd Optical information recording medium

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5836490A (en) * 1981-07-24 1983-03-03 Ricoh Co Ltd Optical information recording medium
JPS5924692A (en) * 1982-07-30 1984-02-08 Tdk Corp Optical recording medium
JPS5955794A (en) * 1982-09-25 1984-03-30 Tdk Corp Optical recording medium
JPS5955795A (en) * 1982-09-27 1984-03-30 Tdk Corp Optical recording medium
JPS5967092A (en) * 1982-10-11 1984-04-16 Tdk Corp Optical recording medium
JPS5971895A (en) * 1982-10-18 1984-04-23 Tdk Corp Optical recording medium
JPS5985791A (en) * 1982-11-08 1984-05-17 Ricoh Co Ltd Optical information recording medium
JPS58114989A (en) * 1982-12-06 1983-07-08 Ricoh Co Ltd Light information recording member

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4735839A (en) * 1985-07-10 1988-04-05 Ricoh Co., Ltd. Optical information recording medium
JPS63307985A (en) * 1987-06-09 1988-12-15 Fuji Photo Film Co Ltd Optical data recording medium
JPS6440387A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440384A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440381A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440386A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440388A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium for compact disc
JPS6440383A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440385A (en) * 1987-08-05 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440389A (en) * 1987-08-06 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6440390A (en) * 1987-08-06 1989-02-10 Taiyo Yuden Kk Optical data recording medium
JPS6449682A (en) * 1987-08-20 1989-02-27 Fuji Photo Film Co Ltd Optical information recording medium
JPH022065A (en) * 1988-06-14 1990-01-08 Fuji Photo Film Co Ltd Optical data recording medium and preparation thereof
JPH0245191A (en) * 1988-08-05 1990-02-15 Adeka Argus Chem Co Ltd Optical recording material
JPH03203690A (en) * 1989-12-29 1991-09-05 Pioneer Electron Corp Optical recording medium
JPH03203692A (en) * 1989-12-29 1991-09-05 Pioneer Electron Corp Optical recording medium

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