JPH11328726A - Optical recording medium - Google Patents

Optical recording medium

Info

Publication number
JPH11328726A
JPH11328726A JP11070828A JP7082899A JPH11328726A JP H11328726 A JPH11328726 A JP H11328726A JP 11070828 A JP11070828 A JP 11070828A JP 7082899 A JP7082899 A JP 7082899A JP H11328726 A JPH11328726 A JP H11328726A
Authority
JP
Japan
Prior art keywords
recording medium
optical recording
group
hydrogen
general formula
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
JP11070828A
Other languages
Japanese (ja)
Inventor
Kyosei Boku
教成 朴
根澤 ▲はい▼
Kontaku Hai
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.)
SKC Co Ltd
Original Assignee
SKC 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 SKC Co Ltd filed Critical SKC Co Ltd
Publication of JPH11328726A publication Critical patent/JPH11328726A/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
    • 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
    • G11B7/2531—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 glass
    • 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
    • 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
    • G11B7/258—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 reflective layers
    • G11B7/259—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 reflective layers based on silver
    • 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
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B2007/00709—Dimensions of grooves or tracks, e.g. groove depth, track pitch
    • 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
    • G11B2007/24318—Non-metallic elements
    • G11B2007/24326—Halides (F, CI, Br...)
    • 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
    • G11B2007/24705—Cyanine
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
    • G11B2220/215—Recordable discs
    • G11B2220/218—Write-once discs

Landscapes

  • Optical Record Carriers And Manufacture Thereof (AREA)
  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Indole Compounds (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain an optical recording medium which is improved in preservation stability of recording and is reduced in a production cost. SOLUTION: The optical recording medium including a recording layer and reflection layer successively formed on a transparent substrate is the optical recording medium characterized in that its recording layer contains the cyanine dyestuff expressed by general formula (i) and a stabilizer and the reflection layer consists of silver or silver alloy. In the formula, Y1 , Y2 , Y3 , Y4 , Y5 , Y6 , Y7 , Y8 , Y9 , Y10 , Y11 and Y12 are selected from the group consisting of hydrogen, halogen, nitro and cyano group; R1 and R2 are, independently from each other, 3-8C alkyl groups; R3 is hydrogen or 1-3C alkyl group; X<-> is selected from the group consisting of ClO4 <-> , PF6 <-> , C6 H5 SO3 <-> and p-CH3 C5 H6 SO3 <-> , provided that when R3 is hydrogen, at least one among Y1 , Y2 , Y3 , Y4 , Y5 , Y6 , Y7 , Y8 , Y9 , Y10 , Y11 and Y12 is selected from the group consisting of halogen, nitro and cyano group.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、光記録媒体に関
し、より詳細には、一回の記録が可能な光記録媒体に関
する。[0001] 1. Field of the Invention [0002] The present invention relates to an optical recording medium, and more particularly, to an optical recording medium capable of performing one-time recording.

【０００２】[0002]

【従来の技術】光記録媒体は、一回に限って記録が可能
な追記型（Ｗｒｉｔｅ Ｏｎｃｅ Ｒｅａｄ Ｍａｎｙ：
ＷＯＲＭ）ならびに記録後消去および再記録が可能な消
去可能型（Ｒｅｗｒｉｔａｂｌｅ：ＲＷ）に区分され
る。2. Description of the Related Art An optical recording medium is a write-once read-many (Write Once Read Many) which can be recorded only once.
WORM) and an erasable type (rewritable: RW) capable of erasing and re-recording after recording.

【０００３】現在、ＷＯＲＭ型の光記録媒体としてはデ
ィスクの形態が実用化されている。特に、データ格納型
ディスク、記録可能なオーディオコンパクトディスク
（Ｃｏｍｐａｃｔ Ｄｉｓｃ：ＣＤ）、フォートＣＤな
どの分野において著しい進歩をみせている。このような
光記録媒体を一般的なＣＤと互換可能にするためには、
反射率が高く、搬送波対雑音比（Ｃａｒｒｉｅｒ−ｔｏ
−ｎｏｉｓｅ ｒａｔｉｏ：ＣＮＲ）特性が優れてお
り、また、記録の保存安定性と高い記録感度を有するこ
とが要求される。At present, a disk form is put into practical use as a WORM type optical recording medium. In particular, remarkable progress has been made in the fields of a data storage type disc, a recordable audio compact disc (CD), a Fort CD and the like. In order to make such an optical recording medium compatible with a general CD,
High reflectivity, carrier-to-noise ratio (Carrier-to-noise ratio)
-Noise ratio (CNR) is required to be excellent, and storage stability of recording and high recording sensitivity are required.

【０００４】このように、ＣＤと互換性を有する光記録
媒体としては記録可能なコンパクトディスク（Ｃｏｍｐ
ａｃｔ Ｄｉｓｃ−Ｒｅｃｏｒｄａｂｌｅ：ＣＤ−Ｒ）
が知られている。この光記録媒体は、透明基板上に光を
吸収できる有機色素をコーティングして記録層を形成し
た後、その上部に反射層を形成して製造される。このよ
うな光記録媒体は記録層として金属薄膜を用いる光記録
媒体に比べて経済性および生産性の面で有利である（米
国特許第５，０９０，００９号参照）。As described above, a recordable compact disc (Comp Comp) is used as an optical recording medium compatible with a CD.
act Disc-Recordable: CD-R)
It has been known. This optical recording medium is manufactured by forming a recording layer by coating an organic dye capable of absorbing light on a transparent substrate, and then forming a reflective layer on the recording layer. Such an optical recording medium is more economical and more productive than an optical recording medium using a metal thin film as a recording layer (see US Pat. No. 5,090,009).

【０００５】前記記録層を形成する有機色素としてはシ
アニン系色素を使用することができる。ここで、シアニ
ン系色素は含窒素ヘテロ環２個を−ＣＨ＝またはその連
鎖をもって結合した陽イオン構造を有する色素を総称し
て指す。そして、反射層を形成する物質としては金、
銀、アルミニウム、銅などが知られている。これらのう
ち反射層形成物質としては金が最も適するが、経済性の
面で好ましくない。反射層形成用物質としてアルミニウ
ムを用いる場合には反射特性が不良であるため光記録媒
体の互換性が低下する。そして、反射層形成用物質とし
て銅を用いる場合には光記録媒体の耐久性が低下する問
題がある。As the organic dye forming the recording layer, a cyanine dye can be used. Here, the cyanine-based dye is a general term for a dye having a cation structure in which two nitrogen-containing heterocycles are linked by -CH = or a chain thereof. And, as the substance forming the reflective layer, gold,
Silver, aluminum, copper and the like are known. Of these, gold is most suitable as the material for forming the reflective layer, but is not preferable in terms of economy. When aluminum is used as the material for forming the reflective layer, the compatibility of the optical recording medium is reduced due to poor reflection characteristics. When copper is used as the material for forming the reflective layer, there is a problem that the durability of the optical recording medium is reduced.

【０００６】一方、反射層形成用物質として銀を用いる
場合は経済性の面で金を用いる場合に比べて有利である
が、銀とシアニン系色素の反応性によってシアニン系色
素が分解されてブロックエラー率とジッター値が増加
し、ＥＦＭ信号特性が劣化されるだけでなく、記録され
た情報が失われるなど深刻な問題が発生する（日本特開
平７−２５４１６７号参照）。このような問題を解決す
るために記録層形成用物質として安定剤とシアニン系色
素を１：１に混合して銀との反応性を減らした高価の特
殊シアニン系色素を用いる方法が提案された（米国特許
第５，１５４，９５８号参照）。しかし、この方法は、
一般的に高価の安定剤が多量用いられるため光記録媒体
の製造単価を上げるという問題がある。On the other hand, when silver is used as the material for forming the reflective layer, it is more economically advantageous than when gold is used, but the cyanine dye is decomposed due to the reactivity of silver and the cyanine dye to block. The error rate and the jitter value increase, causing serious problems such as deterioration of EFM signal characteristics and loss of recorded information (see Japanese Patent Application Laid-Open No. 7-254167). In order to solve such a problem, there has been proposed a method in which a stabilizer and a cyanine dye are mixed at a ratio of 1: 1 to use a special expensive cyanine dye having reduced reactivity with silver as a material for forming a recording layer. (See US Pat. No. 5,154,958). However, this method
Generally, since a large amount of expensive stabilizer is used, there is a problem that the manufacturing unit price of the optical recording medium is increased.

【０００７】したがって、本発明者らは、前記問題を解
決するために反射層に用いられる銀との反応性が低く、
かつ安値なシアニン系色素を使用して記録層を製造する
ことによって本発明を完成することに至った。Therefore, the inventors of the present invention have low reactivity with silver used in the reflective layer to solve the above problem,
The present invention has been completed by producing a recording layer using a low-priced cyanine dye.

【０００８】[0008]

【発明が解決しようとする課題】したがって、本発明の
目的は、記録の保存安定性が改善され、製造コストが節
減された光記録媒体を提供することである。SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an optical recording medium having improved storage stability and reduced production costs.

【０００９】[0009]

【課題を解決するための手段】前記目的を達成するため
に、本発明は、透明基板上に順次的に形成された記録層
および反射層を含む光記録媒体において、前記記録層が
下記一般式（I）のシアニン系色素と安定剤を含有し、
前記反射層が銀または銀合金からなることを特徴とする
光記録媒体を提供する：In order to achieve the above object, the present invention provides an optical recording medium comprising a recording layer and a reflective layer formed sequentially on a transparent substrate, wherein the recording layer has the following general formula: (I) containing a cyanine dye and a stabilizer,
An optical recording medium is provided, wherein the reflective layer is made of silver or a silver alloy:

【化２】 Embedded image

【００１０】前記式で、Ｙ1、Ｙ2、Ｙ3、Ｙ4、Ｙ5、
Ｙ6、Ｙ7、Ｙ8、Ｙ9、Ｙ10、Ｙ11およびＹ12は水素、ハ
ロゲン、ニトロおよびシアノ基からなる群から選ばれ；
Ｒ1およびＲ2は互いに独立的にＣ３−8アルキル基であ
り；Ｒ3は水素またはＣ1−3アルキル基であり；Ｘ−は
ＣｌＯ4 −、ＰＦ6 −、Ｃ6Ｈ5ＳＯ３ −およびｐ−ＣＨ３
Ｃ 5Ｈ6ＳＯ３ −からなる群から選ばれ、ただし、Ｒ３が
水素であるとき、Ｙ1、Ｙ2、Ｙ3、Ｙ4、Ｙ5、Ｙ6、
Ｙ7、Ｙ8、Ｙ9、Ｙ10、Ｙ11およびＹ12のうち少なくと
も一つはハロゲン、ニトロおよびシアノ基からなる群か
ら選ばれる。In the above equation, Y1, YTwo, YThree, YFour, YFive,
Y6, Y7, Y8, Y9, YTen, Y11And Y12Is hydrogen, ha
Selected from the group consisting of logene, nitro and cyano groups;
R1And RTwoAre independently of each other C3-8An alkyl group
R;ThreeIs hydrogen or C1-3X is an alkyl group;−Is
ClOFour −, PF6 −, C6HFiveSO3 −And p-CH3
C FiveH6SO3 −Selected from the group consisting of3But
When it is hydrogen, Y1, YTwo, YThree, YFour, YFive, Y6,
Y7, Y8, Y9, YTen, Y11And Y12At least
Is one a group consisting of halogen, nitro and cyano groups?
Selected from

【００１１】[0011]

【発明の実施の形態】以下、本発明をさらに詳細に説明
する。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail.

【００１２】本発明に用いられる基板は、光ディスクに
基板材料として通常的に用いられるポリカーボネートな
どを用いてスタンパー（ｓｔａｍｐｅｒ）を用いた射出
成形などの方法で製造され得る。前記基板のトラッキン
グ溝の深さは１８０ないし２５０ｎｍ、溝底の幅は２５
０ないし４５０ｎｍであることが好ましい。The substrate used in the present invention can be manufactured by a method such as injection molding using a stamper, using polycarbonate or the like usually used as a substrate material for an optical disk. The depth of the tracking groove of the substrate is 180 to 250 nm, and the width of the groove bottom is 25.
It is preferably from 0 to 450 nm.

【００１３】前記記録層には一般式（I）のシアニン系
色素が用いられる。好ましいシアニン系色素は一般式
（I）においてＲ３がメチル基であり、Ｙ1、Ｙ2、Ｙ3、
Ｙ4、Ｙ5、Ｙ6、Ｙ7、Ｙ8、Ｙ9、Ｙ10、Ｙ11およびＹ12
がすべて水素であるものである。The recording layer contains a cyanine dye represented by the general formula (I). Preferred cyanine dyes are those in which R 3 is a methyl group in the general formula (I), and Y 1 , Y 2 , Y 3 ,
Y 4 , Y 5 , Y 6 , Y 7 , Y 8 , Y 9 , Y 10 , Y 11 and Y 12
Are all hydrogen.

【００１４】前記記録層は、シアニン系色素の他に安定
剤をさらに含む。ここで安定剤は当分野で通常的に安定
剤として用いられる物質であり、シングレット酸素消光
剤（ｓｉｎｇｌｅｔ ｏｘｙｇｅｎ ｑｕｅｎｃｈｅｒ）
が好ましい。代表的な消光剤の例としては、フェニルア
ミン系消光剤、ニトロソアニリン、ニトロソフェノール
などがある。前記安定剤と一般式（I）のシアニン系色
素の混合重量比は３：１００ないし１５：１００であ
る。The recording layer further contains a stabilizer in addition to the cyanine dye. Here, the stabilizer is a substance commonly used as a stabilizer in the art, and is a singlet oxygen quencher.
Is preferred. Examples of typical quenchers include phenylamine-based quenchers, nitrosoaniline, and nitrosophenol. The mixing weight ratio of the stabilizer to the cyanine dye of the general formula (I) is from 3: 100 to 15: 100.

【００１５】記録層の厚さは１００ないし２５０ｎｍで
あることが好ましい。記録層はスピンコーティング、ス
パッタリングなどの通常の方法で製造することができ
る。たとえば、シアニン系色素および安定剤を適切な溶
媒（例：２,２,３,３−テトラフルオロプロパノール、
ジアセトンアルコール、アルコキシアルコール）に溶か
した溶液を用いてスピンコーティング方法でコーティン
グした後、７０ないし９０℃で３０分ないし１時間乾燥
して製造できる。[0015] The thickness of the recording layer is preferably 100 to 250 nm. The recording layer can be manufactured by a usual method such as spin coating and sputtering. For example, a cyanine dye and a stabilizer are combined with a suitable solvent (eg, 2,2,3,3-tetrafluoropropanol,
After coating by a spin coating method using a solution dissolved in diacetone alcohol or alkoxy alcohol), the solution can be dried at 70 to 90 ° C. for 30 minutes to 1 hour.

【００１６】本発明の反射層としては銀または銀合金が
用いられる。銀合金は、鉄、シリコン、金などの元素を
含み得る。銀または銀合金反射層は通常のスパッタリン
グ、蒸発などの方法で製造し得る。銀または銀合金反射
層の厚さは約３０ないし９０ｎｍである。Silver or a silver alloy is used for the reflection layer of the present invention. Silver alloys can include elements such as iron, silicon, and gold. The silver or silver alloy reflection layer can be manufactured by a usual method such as sputtering or evaporation. The thickness of the silver or silver alloy reflective layer is about 30 to 90 nm.

【００１７】また、反射層上には保護層をさらに形成し
得るが、通常ＵＶ硬化型樹脂などが用いられる。Further, a protective layer may be further formed on the reflective layer, but usually a UV-curable resin or the like is used.

【００１８】[0018]

【実施例】以下、本発明を下記実施例および比較例によ
ってさらに詳細に説明する。ただし、下記実施例および
比較例は本発明を例示するのみで、本発明を制限するこ
とではない。The present invention will be described in more detail with reference to the following examples and comparative examples. However, the following Examples and Comparative Examples only illustrate the present invention, and do not limit the present invention.

【００１９】〔実施例１〕スタンパーを用いた射出成形
法によって螺旋型トラッキング（深さ２２０ｍｍ、幅３
５０ｍｍ、ピッチ１．６μｍ）が形成されている厚さ
１．２ｍｍ、外径１２０ｍｍのポリカーボネートディス
ク基板を製造した。[Example 1] Spiral tracking (depth: 220 mm, width: 3) by an injection molding method using a stamper
A polycarbonate disk substrate having a thickness of 1.2 mm and an outer diameter of 120 mm on which a 50 mm pitch 1.6 μm) was formed was manufactured.

【００２０】前記ディスク基板の基板中心部に、下記一
般式（II）の色素（富士写真フィルム製品）３重量％お
よび色素重量の３重量％に該当する量のフェニルアミン
系安定剤（日本化薬製品ＩＲＧ０２２２）を含む２,２,
３,３−テトラフルオロプロパノール溶液１ｍｌを滴下
した後、前記基板を１５００ｒｐｍの速度で１０秒間回
転させた。次いで、前記基板を７０℃で２時間乾燥して
記録層（厚さ：１５０ｎｍ）を形成した。In the center of the disk substrate, 3% by weight of a dye of the following general formula (II) (Fuji Photo Film Co., Ltd.) and a phenylamine-based stabilizer (Nippon Kayaku 2,2, including products IRG0222)
After dropping 1 ml of 3,3-tetrafluoropropanol solution, the substrate was rotated at a speed of 1500 rpm for 10 seconds. Next, the substrate was dried at 70 ° C. for 2 hours to form a recording layer (thickness: 150 nm).

【００２１】[0021]

【化３】 Embedded image

【００２２】前記記録層の上部に銀をスパッタリングし
て６０ｎｍ厚さの反射層を形成した。この反射層の上部
に紫外線硬化型樹脂であるＳＫ３２００（ソニーケミカ
ル社）をスピンコーティングした後、紫外線を照射して
保護層を形成することによって光ディスクを完成した。Silver was sputtered on the recording layer to form a reflective layer having a thickness of 60 nm. An optical disk was completed by spin-coating SK3200 (Sony Chemical Co., Ltd.), which is an ultraviolet-curable resin, on the reflective layer, and then irradiating ultraviolet rays to form a protective layer.

【００２３】〔実施例２〕一般式（II）の化合物の代わ
りに下記一般式（III）の化合物を用いたことを除いて
は、実施例１と同様な手順を繰返して光ディスクを製造
した。Example 2 An optical disk was manufactured by repeating the same procedure as in Example 1 except that the compound of the following general formula (III) was used instead of the compound of the general formula (II).

【００２４】[0024]

【化４】 Embedded image

【００２５】〔比較例１〕一般式（II）の化合物の代わ
りに下記一般式（IV）の化合物と下記一般式（V）の化
合物の４：６重量比の混合物を用いたことを除いては、
実施例１と同様な手順を繰返して光ディスクを製造し
た。Comparative Example 1 A compound of the following general formula (IV) and a compound of the following general formula (V) in a 4: 6 weight ratio were used in place of the compound of the general formula (II). Is
An optical disk was manufactured by repeating the same procedure as in Example 1.

【００２６】[0026]

【化５】 Embedded image

【００２７】[0027]

【化６】 Embedded image

【００２８】〔比較例２〕一般式（II）の化合物の代わ
りに下記一般式（IV）の化合物と下記一般式（VI）の化
合物の４：６重量比の混合物を用いたことを除いては、
実施例１と同様な手順を繰返して光ディスクを製造し
た。Comparative Example 2 A compound of the following general formula (IV) and a compound of the following general formula (VI) in a 4: 6 weight ratio were used in place of the compound of the general formula (II). Is
An optical disk was manufactured by repeating the same procedure as in Example 1.

【００２９】[0029]

【化７】 Embedded image

【００３０】〔比較例３〕一般式（II）の化合物の代わ
りに下記一般式（VII）の化合物を用いたことを除いて
は、実施例１と同様な手順を繰返して光ディスクを製造
した。Comparative Example 3 An optical disk was manufactured by repeating the same procedure as in Example 1 except that the compound of the following general formula (VII) was used instead of the compound of the general formula (II).

【００３１】[0031]

【化８】 Embedded image

【００３２】〔比較例４〕一般式（II）の化合物の代わ
りに下記一般式（VIII）の化合物を用いたことを除いて
は実施例１と同様な手順を繰返して光ディスクを製造し
た。Comparative Example 4 An optical disk was manufactured by repeating the same procedure as in Example 1 except that the compound of the following general formula (VIII) was used instead of the compound of the general formula (II).

【００３３】[0033]

【化９】 Embedded image

【００３４】〔比較例５〕一般式（II）の化合物の代わ
りに一般式４の化合物を用いたことを除いては実施例１
と同様な手順を繰返して光ディスクを製造した。Comparative Example 5 Example 1 was repeated except that the compound of general formula 4 was used instead of the compound of general formula (II).
An optical disk was manufactured by repeating the same procedure as described above.

【００３５】前記実施例および比較例で製造した光ディ
スクの特性を次のように評価した。The characteristics of the optical disks manufactured in the above Examples and Comparative Examples were evaluated as follows.

【００３６】＜耐環境性特性＞製造した光ディスクをタ
ーンテーブル上に載せ、１．４ｍ／ｓの線速度で回転さ
せながら７８５ｎｍの発進波長の半導体レーザーを搭載
した光学ヘッドを有するドライブ（アペックス（Ａｐｅ
ｘ）社のモデル名：ＯＨＭＴ−２０００）を用いてレー
ザービームが樹脂基板を通過してトラッキング溝に照射
するように制御しながら、コンパクトディスクにおいて
使用されている通常の方法に従って４〜８ｍＷのレーザ
ー出力でＥＦＭ変調信号を記録した（Ｐｈｉｌｉｐｓ社
のレッドブック（Ｒｅｄ ｂｏｏｋ）およびオレンジブ
ック（Ｏｒａｎｇｅ Ｂｏｏｋ）参照）。<Environment Resistance> A drive (Apex) having an optical head equipped with a semiconductor laser having a starting wavelength of 785 nm while rotating the manufactured optical disk on a turntable at a linear velocity of 1.4 m / s.
x) The laser of 4 to 8 mW according to the usual method used for compact discs while controlling the laser beam to pass through the resin substrate and irradiate the tracking groove using the model name of OHMT-2000). EFM modulated signals were recorded at the output (see Philips Red Book and Orange Book).

【００３７】次いで、光ディスクを７０℃、湿度８０％
の条件下で７２時間放置して耐環境テストを行った。こ
のテスト前後におけるＥＦＭ変調信号、ジッター、ブロ
ックエラー率を比較分析して耐環境性特性を評価し、そ
の結果を表１に示す。Next, the optical disk was heated to 70 ° C. and 80% humidity.
Was left for 72 hours under the above conditions to perform an environmental resistance test. The EFM modulated signal, the jitter, and the block error rate before and after this test were compared and analyzed to evaluate the environmental resistance characteristics, and the results are shown in Table 1.

【００３８】表１から分るように、本発明の実施例によ
って製造された光ディスクは、比較例によって製造され
た光ディスクに比べて耐環境テスト以降のＥＦＭ変調信
号、ジッターおよびブロックエラー率特性が優れてい
る。As can be seen from Table 1, the optical disc manufactured according to the embodiment of the present invention is superior to the optical disc manufactured according to the comparative example in EFM modulated signal, jitter and block error rate characteristics after the environmental resistance test. ing.

【００３９】[0039]

【表１】 [Table 1]

【００４０】＜ＣＤ規格確認＞前記実施例１および比較
例５で製造した光ディスクがＣＤ規格を満たすかどうか
をＣＤ評価器［アペックス（Ａｐｅｘ）社のモデル名：
ＯＨＭＴ−２０００］を用いて評価した後、その結果を
表２に示す。<Confirmation of CD Standard> Whether or not the optical discs manufactured in Example 1 and Comparative Example 5 satisfy the CD standard is determined by using a CD evaluator [Apex model name:
OHMT-2000], and the results are shown in Table 2.

【００４１】[0041]

【表２】 [Table 2]

【００４２】表２から分るように、本発明の実施例１に
よって製造された光ディスクはＣＤ規格条件をすべて満
たすが、比較例５によって製造された光ディスクは反射
特性の面でＣＤ規格条件を満たしていない。また、信号
特性およびジッター値においても実施例１の場合が比較
例５に比べて優れていた。As can be seen from Table 2, the optical disk manufactured according to Example 1 of the present invention satisfies all the CD standard conditions, while the optical disk manufactured according to Comparative Example 5 satisfies the CD standard condition in terms of reflection characteristics. Not. Also, the signal characteristics and jitter values of Example 1 were superior to Comparative Example 5.

【００４３】[0043]

【発明の効果】記録層形成物質として一般式（I）のシ
アニン系色素を用い、反射層形成物質として銀を用いる
本発明の光記録媒体は、記録の保存安定性が改善される
だけでなく、製造コストも節減される。According to the optical recording medium of the present invention using a cyanine dye of the general formula (I) as a recording layer forming substance and silver as a reflecting layer forming substance, not only the storage stability of the recording is improved, but also Also, manufacturing costs are reduced.

Claims (6)

【特許請求の範囲】[Claims] 【請求項１】透明基板上に順次的に形成された記録層お
よび反射層を含む光記録媒体において、前記記録層が下
記一般式（I）のシアニン系色素と安定剤を含有し、前
記反射層が銀または銀合金からなることを特徴とする光
記録媒体。 【化１】 前記式で、Ｙ1、Ｙ2、Ｙ3、Ｙ4、Ｙ5、Ｙ6、Ｙ7、Ｙ8、
Ｙ9、Ｙ10、Ｙ11およびＹ12は水素、ハロゲン、ニトロ
およびシアノ基からなる群から選ばれ；Ｒ1およびＲ2は
互いに独立的にＣ３−8アルキル基であり；Ｒ3は水素ま
たはＣ1−3アルキル基であり；Ｘ−はＣｌＯ4 −、ＰＦ6
−、Ｃ6Ｈ5ＳＯ３ −およびｐ−ＣＨ３Ｃ 5Ｈ6ＳＯ３ −か
らなる群から選ばれ、ただし、Ｒ３が水素であるとき、
Ｙ1、Ｙ2、Ｙ3、Ｙ4、Ｙ5、Ｙ6、Ｙ7、Ｙ8、Ｙ9、
Ｙ10、Ｙ11およびＹ12のうち少なくとも一つはハロゲ
ン、ニトロおよびシアノ基からなる群から選ばれる。1. A recording layer and a recording layer sequentially formed on a transparent substrate.
And an optical recording medium including a reflective layer, wherein the recording layer is
Containing a cyanine dye of the general formula (I) and a stabilizer,
Light wherein the reflective layer is made of silver or a silver alloy
recoding media. Embedded imageIn the above formula, Y1, YTwo, YThree, YFour, YFive, Y6, Y7, Y8,
Y9, YTen, Y11And Y12Is hydrogen, halogen, nitro
R is selected from the group consisting of1And RTwoIs
C independently of each other3-8An alkyl group; RThreeIs hydrogen
Or C1-3X is an alkyl group;−Is ClOFour −, PF6
−, C6HFiveSO3 −And p-CH3C FiveH6SO3 −Or
Selected from the group consisting of3Is hydrogen,
Y1, YTwo, YThree, YFour, YFive, Y6, Y7, Y8, Y9,
YTen, Y11And Y12At least one of them is haloge
, Nitro and cyano groups. 【請求項２】Ｒ３がメチル基であり；Ｙ1、Ｙ2、Ｙ3、
Ｙ4、Ｙ5、Ｙ6、Ｙ7、Ｙ8、Ｙ9、Ｙ10、Ｙ11およびＹ12
がすべて水素であることを特徴とする請求項１に記載の
光記録媒体。Wherein R 3 is methyl group; Y 1, Y 2, Y 3,
Y 4 , Y 5 , Y 6 , Y 7 , Y 8 , Y 9 , Y 10 , Y 11 and Y 12
2. The optical recording medium according to claim 1, wherein all are hydrogen. 【請求項３】前記安定剤が、シングレット酸素消光剤で
あることを特徴とする請求項１に記載の光記録媒体。3. The optical recording medium according to claim 1, wherein said stabilizer is a singlet oxygen quencher. 【請求項４】前記安定剤と前記一般式（I）のシアニン
化合物の混合重量比が３：１００ないし１５：１００で
あることを特徴とする請求項１に記載の光記録媒体。4. The optical recording medium according to claim 1, wherein the mixing weight ratio of the stabilizer to the cyanine compound of the general formula (I) is from 3: 100 to 15: 100. 【請求項５】前記透明基板が、深さ１８０ないし２５０
ｎｍ、溝底の幅２５０ないし４５０ｎｍのトラッキング
溝を含むことを特徴とする請求項１に記載の光記録媒
体。5. The transparent substrate has a depth of 180 to 250.
2. The optical recording medium according to claim 1, comprising a tracking groove having a width of 250 nm to 450 nm at the bottom of the groove. 【請求項６】前記記録層の厚さが、１００ないし２５０
ｎｍであることを特徴とする請求項１に記載の光記録媒
体。6. The recording layer has a thickness of 100 to 250.
2. The optical recording medium according to claim 1, wherein the optical recording medium is nm.
JP11070828A 1998-03-16 1999-03-16 Optical recording medium Pending JPH11328726A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR1019980008797A KR19990074901A (en) 1998-03-16 1998-03-16 Optical recording media
KR1998-8797 1998-03-16

Publications (1)

Publication Number Publication Date
JPH11328726A true JPH11328726A (en) 1999-11-30

Family

ID=19534857

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11070828A Pending JPH11328726A (en) 1998-03-16 1999-03-16 Optical recording medium

Country Status (3)

Country Link
JP (1) JPH11328726A (en)
KR (1) KR19990074901A (en)
TW (1) TW438876B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114685348A (en) * 2022-04-14 2022-07-01 华南理工大学 Near-infrared cyanine photosensitizer with AIE (aluminum-doped zinc oxide) property and preparation method and application thereof

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114685348A (en) * 2022-04-14 2022-07-01 华南理工大学 Near-infrared cyanine photosensitizer with AIE (aluminum-doped zinc oxide) property and preparation method and application thereof

Also Published As

Publication number Publication date
KR19990074901A (en) 1999-10-05
TW438876B (en) 2001-06-07

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