JPH0538878A - Light recording medium - Google Patents
Light recording mediumInfo
- Publication number
- JPH0538878A JPH0538878A JP3221160A JP22116091A JPH0538878A JP H0538878 A JPH0538878 A JP H0538878A JP 3221160 A JP3221160 A JP 3221160A JP 22116091 A JP22116091 A JP 22116091A JP H0538878 A JPH0538878 A JP H0538878A
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- recording
- recording layer
- layer
- organic dye
- 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.)
- Withdrawn
Links
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、レーザ光により情報を
記録する光情報記録媒体に関し、コンパクトディスクの
規格に準拠した再生が可能な記録媒体に係わる。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical information recording medium for recording information with a laser beam, and more particularly to a recording medium which can be reproduced according to the compact disc standard.
【0002】[0002]
【従来の技術】記録可能な光情報記録媒体は、極めて広
く普及しているコンパクトディスク(以下CDと呼ぶ)
に準拠して、再生できることが望まれる。そのため多く
の検討がなされているが、その一つとして、特開平2ー
87339号に開示されている技術がある。これらは有
機色素系の記録膜と反射膜を用いて、レーザ光の入射側
に反射する光量が、CDの規格を満足する高い反射率を
得、且つ、データの再生に際しては、CDフォーマット
に準拠する出力信号が得られる記録可能な光情報記録媒
体である。2. Description of the Related Art A recordable optical information recording medium is a very widespread compact disc (hereinafter referred to as a CD).
It is desirable to be able to reproduce in conformity with. Therefore, many studies have been made, and one of them is the technique disclosed in Japanese Patent Application Laid-Open No. 2-87339. These use an organic dye-based recording film and a reflective film to obtain a high reflectance in which the amount of light reflected on the incident side of laser light satisfies the CD standard, and when reproducing data, conform to the CD format. It is a recordable optical information recording medium that can obtain an output signal.
【0003】[0003]
【発明が解決しようとする課題】近年、より記録密度の
高い光ディスクの開発が進められており、この記録密度
を高めるため、光ビームのスポット径をより微少なもの
にしなければならない問題点があった。そのため、従来
780nmを中心とした半導体レーザから、SHG素子
等を利用して、光の波長を短くしたグリーンレーザやブ
ルーレーザを用い、これらのレーザを回折限界まで絞り
込んで、ビームスポット径を小さくして記録密度を高め
る方法が進められている。In recent years, development of an optical disc having a higher recording density has been advanced, and there is a problem that the spot diameter of the light beam must be made smaller in order to increase the recording density. It was Therefore, from the conventional semiconductor laser centered at 780 nm, using a SHG element or the like, a green laser or a blue laser whose light wavelength is shortened is used, and these lasers are narrowed down to the diffraction limit to reduce the beam spot diameter. The method of increasing the recording density is being promoted.
【0004】当然のことながら、記録媒体もこれらの光
の波長のビームスポットで記録できるものでなくてはな
らない。本発明は、より小さな記録スポットを用いるこ
とにより高密度化をはかる短波長のレーザで記録できる
光記録媒体を提供することにある。As a matter of course, the recording medium must also be capable of recording with beam spots having these wavelengths of light. It is an object of the present invention to provide an optical recording medium capable of recording with a laser having a short wavelength, which can achieve higher density by using a smaller recording spot.
【0005】[0005]
【課題を解決するための手段】そのため本発明では、透
光性を有する基板上に記録層を形成し、該記録層の上に
反射層を形成してなる光記録媒体において、前記記録層
を化1に示すスチリル系有機色素を用いたことを特徴と
したものである。Therefore, according to the present invention, in an optical recording medium in which a recording layer is formed on a transparent substrate and a reflective layer is formed on the recording layer, the recording layer is It is characterized by using the styryl organic dye shown in Chemical formula 1.
【0006】[0006]
【実施例】本発明による一実施例を図1の断面構成図に
よって説明する。図において、ポリカーボネートによる
基板1の表面上に、スチリル系色素NKー1977
(3,3ージメチルー2ー(4’ージメチルアミノスチ
リル)インドレニン)〔日本感光色素研究所製〕0.1
grを、ジアセトンアルコール3mlに溶解した色素溶
液をスピンコート法を用いて2500rpmでコート
し、記録層2を形成する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described with reference to the sectional view of FIG. In the figure, a styryl dye NK-1977 is formed on the surface of the substrate 1 made of polycarbonate.
(3,3-Dimethyl-2- (4'-dimethylaminostyryl) indolenine) [manufactured by Japan Photosensitive Dye Research Institute] 0.1
The recording layer 2 is formed by coating gr with a dye solution dissolved in 3 ml of diacetone alcohol at 2500 rpm by a spin coating method.
【0007】続いて、この記録層2の表面に、スパッタ
リング法でアルミによる反射層3を500A°成膜す
る。さらにスピンコート法によってUV樹脂をコート
し、紫外線を照射して硬化させ、保護層4を形成する。
以上の構成による光記録媒体にビームスポットを照射す
ると、図2で示すように、照射された部分は加熱溶解さ
れ、一部分解した色素とこれに接して加熱軟化した基板
材料であるポリカーボネートが相互に作用して、色素層
と基板との界面に変形部が形成され、これが記録ピット
となる。Subsequently, a reflection layer 3 made of aluminum is formed on the surface of the recording layer 2 by a sputtering method at 500 A °. Further, a UV resin is coated by a spin coating method and irradiated with ultraviolet rays to be cured to form a protective layer 4.
When the optical recording medium having the above structure is irradiated with a beam spot, as shown in FIG. 2, the irradiated portion is heated and melted, and the partially decomposed dye and the polycarbonate, which is the substrate material that is heat-softened in contact with the dye, are mutually dissolved. As a result, a deformed portion is formed at the interface between the dye layer and the substrate, and this becomes a recording pit.
【0008】この記録媒体の色素記録層の基板側入射反
射率を図3に示す。本実施例では、最大吸収波長が短波
長レーザで記録可能な400nm台前半となり、記録レ
ーザーに488nmのアルゴンレーザーを用いた場合、
基板入射反射率はCD−WO規格の基板側入射鏡面部分
反射率Ro70%を十分に満足した値を示した。The substrate side incident reflectance of the dye recording layer of this recording medium is shown in FIG. In this embodiment, the maximum absorption wavelength is in the first half of the 400 nm range, which can be recorded by a short wavelength laser, and when a 488 nm argon laser is used as the recording laser,
The substrate incident reflectance was a value that sufficiently satisfied the substrate-side incident mirror surface partial reflectance Ro of 70% of the CD-WO standard.
【0009】[0009]
【発明の効果】本発明によれば、短波長のレーザーを用
いた、より高密度の情報を記録できる光記録媒体を提供
することができる。According to the present invention, it is possible to provide an optical recording medium using a laser having a short wavelength and capable of recording higher density information.
【図1】本発明の実施例を示す断面構成図。FIG. 1 is a sectional configuration diagram showing an embodiment of the present invention.
【図2】本発明による実施例の記録メカニズムを示す説
明図。FIG. 2 is an explanatory diagram showing a recording mechanism of an embodiment according to the present invention.
【図3】本発明による実施例の特性を示す特性図。FIG. 3 is a characteristic diagram showing characteristics of an example according to the present invention.
1 基板 2 記録層 3 反射層 4 保護層 1 substrate 2 recording layer 3 reflective layer 4 protective layer
Claims (1)
し、該記録層の上に反射層を形成してなる光記録媒体に
おいて、前記記録層を化1に示すスチリル系有機色素を
用いたことを特徴とする光記録媒体。 【化1】 1. An optical recording medium comprising a translucent substrate on which a recording layer is formed, and a reflective layer formed on the recording layer, wherein the recording layer comprises a styryl organic dye represented by Chemical Formula 1. An optical recording medium characterized by being used. [Chemical 1]
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3221160A JPH0538878A (en) | 1991-08-07 | 1991-08-07 | Light recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3221160A JPH0538878A (en) | 1991-08-07 | 1991-08-07 | Light recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0538878A true JPH0538878A (en) | 1993-02-19 |
Family
ID=16762417
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3221160A Withdrawn JPH0538878A (en) | 1991-08-07 | 1991-08-07 | Light recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0538878A (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6162520A (en) * | 1997-09-17 | 2000-12-19 | Mitsui Chemicals, Inc. | Optical recording medium and dipyrromethene metal chelate compound for use therein |
EP1191526A2 (en) * | 2000-08-25 | 2002-03-27 | Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo | Optical recording media |
WO2002086879A1 (en) * | 2001-03-28 | 2002-10-31 | Bayer Aktiengesellschaft | Optical data support comprising a hemicyanin dye in the information layer as light-absorbing compound |
US6524678B2 (en) | 2000-02-16 | 2003-02-25 | Fuji Photo Film Co., Ltd. | Information recording medium and recording method |
US7354694B1 (en) * | 1999-12-02 | 2008-04-08 | Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyuko | Styryl dye |
-
1991
- 1991-08-07 JP JP3221160A patent/JPH0538878A/en not_active Withdrawn
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6162520A (en) * | 1997-09-17 | 2000-12-19 | Mitsui Chemicals, Inc. | Optical recording medium and dipyrromethene metal chelate compound for use therein |
US6355327B1 (en) | 1997-09-17 | 2002-03-12 | Mitsui Chemicals, Inc. | Optical recording medium and dipyrromethene metal chelate compound for use therein |
US7354694B1 (en) * | 1999-12-02 | 2008-04-08 | Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyuko | Styryl dye |
US6524678B2 (en) | 2000-02-16 | 2003-02-25 | Fuji Photo Film Co., Ltd. | Information recording medium and recording method |
EP1191526A2 (en) * | 2000-08-25 | 2002-03-27 | Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo | Optical recording media |
EP1191526A3 (en) * | 2000-08-25 | 2002-04-17 | Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo | Optical recording media |
EP1369861A3 (en) * | 2000-08-25 | 2003-12-17 | Kabushiki Kaisha Hayashibara Seibutsu Kagaku Kenkyujo | Optical recording media |
WO2002086879A1 (en) * | 2001-03-28 | 2002-10-31 | Bayer Aktiengesellschaft | Optical data support comprising a hemicyanin dye in the information layer as light-absorbing compound |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
A300 | Application deemed to be withdrawn because no request for examination was validly filed |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19981112 |