JPH0632996B2 - Optical recording method - Google Patents

Optical recording method

Info

Publication number
JPH0632996B2
JPH0632996B2 JP59081117A JP8111784A JPH0632996B2 JP H0632996 B2 JPH0632996 B2 JP H0632996B2 JP 59081117 A JP59081117 A JP 59081117A JP 8111784 A JP8111784 A JP 8111784A JP H0632996 B2 JPH0632996 B2 JP H0632996B2
Authority
JP
Japan
Prior art keywords
recording
optical recording
recording layer
dye
wavelength
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.)
Expired - Lifetime
Application number
JP59081117A
Other languages
Japanese (ja)
Other versions
JPS60226036A (en
Inventor
宏 小沢
純夫 広瀬
洋一 細野
功 西沢
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.)
Mitsui Toatsu Chemicals Inc
Original Assignee
Mitsui Toatsu Chemicals Inc
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 Mitsui Toatsu Chemicals Inc filed Critical Mitsui Toatsu Chemicals Inc
Priority to JP59081117A priority Critical patent/JPH0632996B2/en
Publication of JPS60226036A publication Critical patent/JPS60226036A/en
Publication of JPH0632996B2 publication Critical patent/JPH0632996B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B7/242Record 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
    • G11B7/244Record 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
    • G11B7/246Record 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
    • G11B7/247Record 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
    • G11B7/2472Record 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

Landscapes

  • Thermal Transfer Or Thermal Recording In General (AREA)
  • Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は、畫像、音声等の情報を紫外線露光により光記
録媒体に書き込む光記録方法に関する。
Description: TECHNICAL FIELD The present invention relates to an optical recording method for writing information such as ridge image and sound on an optical recording medium by exposure to ultraviolet light.

[従来の技術] 近年、レーザー技術の進歩に伴い、情報の記録、再生に
レーザービームを用いた光記録が注目をあつめ、ビディ
オディスク、オーディオディスク等の、一つの情報を数
多く複製し、ユーザーへ供給することが実用化されてい
る。かかる光記録方式は、記録密度が著しく大きく、非
接触読みだしの為に寿命がながく又ランダムアクセス時
間が短い等、従来のレコード等のアナログ記録方式や磁
気記録では達成しえなかった利点が認められている。
[Prior Art] With the advance of laser technology in recent years, optical recording using a laser beam for recording and reproducing information has attracted attention, and many pieces of one information such as a video disc and an audio disc can be duplicated and presented to users. Supply has been put to practical use. Such an optical recording system has an extremely high recording density, has a long life due to non-contact reading, and has a short random access time.Accordingly, advantages that cannot be achieved by conventional analog recording systems such as records and magnetic recording are recognized. Has been.

しかし、一方では、これ等ビディオディスク、オーディ
オディスクの記録媒体は、1μm以下の小さな記録ピッ
トを射出成形、プレス成形等の機械的な方法で形成して
おり、高価な精密成形機を必要とする他、成形材料の材
質的制約や、ピット転写用スタンパーの目づまり等生産
技術的に多くの問題をかかえている。
However, on the other hand, these recording media for video discs and audio discs have small recording pits of 1 μm or less formed by mechanical methods such as injection molding and press molding, and require an expensive precision molding machine. In addition, there are many problems in terms of production technology such as restrictions on the molding material and clogging of the stamper for pit transfer.

本発明者等は、より簡便な装置によって高収率で生産し
うる光記録媒体を研究し、先に特開昭57−19533
6及び57−195341に記載する光記録システム及
び媒体を提案した。
The present inventors have studied an optical recording medium that can be produced in a high yield with a simpler device, and previously disclosed JP-A-57-19533.
6 and 57-195341 proposed optical recording system and medium.

すなわち、これらの記録システム及び媒体は、特定の可
視〜近赤外線波長領域に吸収を有する化合物を含有する
記録層の所望の位置に、紫外線、電子式等の活性エネル
ギー線が照射された該化合物の可視〜近赤外線波長領域
の吸収が減衰することを利用して可視〜近赤外線波長領
域に発振波長を有するレーザービームで記録の読み出し
再生を行うものであり、射出成形等の機械的方法による
ピットの形成をなんら必要としないという特長を有す
る。
That is, these recording systems and media, the desired position of the recording layer containing a compound having absorption in a specific visible to near-infrared wavelength region, ultraviolet rays, the active energy ray of the electronic formula or the like of the compound Utilizing the attenuation of absorption in the visible to near-infrared wavelength region, recording and reading and reproduction are performed with a laser beam having an oscillation wavelength in the visible to near-infrared wavelength region. It has the feature that it does not require any formation.

[発明が解決しようとする課題] しかしながら、活性エネルギー線を露光した場合の読み
取りレーザー光に対応する可視〜近赤外線吸収の減衰
は、比較的長い露光時間が大エネルギーの露光光源を要
するので、いわゆる記録露光感度の向上が必要である。
[Problems to be Solved by the Invention] However, the attenuation of visible to near-infrared absorption corresponding to a reading laser beam when an active energy ray is exposed requires a so-called exposure light source with a large energy for a relatively long exposure time. It is necessary to improve the recording exposure sensitivity.

したがって、本発明の目的は、上記の露光感度を改良
し、上記原理に基いて記録及び再生を行うのに用いられ
る光記録媒体に改良された露光感度をもって記録を行う
ことができる光記録方法を提供することにある。
Therefore, an object of the present invention is to provide an optical recording method capable of improving the above-mentioned exposure sensitivity and performing recording with the improved exposure sensitivity on an optical recording medium used for recording and reproducing based on the above principle. To provide.

[課題を解決するための手段] 本発明の光記録方法は、一般式(I) [式(I)中、Yは、−H、−SO3 、−SO3H、−SO3Na
または−SO3Kであり、lは1〜4の整数であり、Y′
は−H、−SO3H、−SO3Na または−SO3Kであり、nは1
〜4の整数であり、mは3または4であり、X はハロ
ゲンイオン、ClO4またはBF4で表わされる1価の陰イオ
ンであり、Yが−SO3 であるときにはX は存在しな
い]の構造を有する色素を含有する記録層を有する光記
録媒体を使用する光記録方法であって、上記記録層に40
0nm以下の波長を有する紫外線を照射して被照射部分に
おける再生用レーザー光の吸収を減じせしめることによ
り書き込みが行われることを特徴とするものである。
[Means for Solving the Problems] The optical recording method according to the present invention has the general formula (I):[In Formula (I), Y is -H, -SO3 , -SO3H, −SO3Na
 Or −SO3K, l is an integer of 1 to 4, Y '
Is -H, -SO3H, −SO3Na or −SO3K and n is 1
Is an integer from 4 to 4, m is 3 or 4, X Is halo
Gen ion, ClOFourOr BFFourMonovalent anion represented by
And Y is -SO3 X when Does not exist
Optical recording having a recording layer containing a dye having a structure
An optical recording method using a recording medium, comprising:
Irradiate ultraviolet rays with a wavelength of 0 nm or less to the irradiated area
By reducing the absorption of the reproduction laser light in
It is characterized in that rewriting is performed.

本発明の記録層の必須成分である上記の色素としては、
例えば の如き構造式を有する色素であり、又これらに限らず上
記した一般式(I)であらわされるように、置換基又は配
位イオンの種類がかわっていてもよく、又これ等の色素
を2種以上混合して使用しても良い。
As the above-mentioned dye which is an essential component of the recording layer of the present invention,
For example A dye having a structural formula such as the above, and the type of the substituent or the coordinating ion may be changed as represented by the general formula (I), not limited to these, and these dyes may be You may use it in mixture of 2 or more types.

上記の色素は、700〜1000nmの可視又は近赤外線波長
領域に極大吸収を有し、記録の再生に用いられるレーザ
ー光の可視又は近赤外線波長領域発振波長に強い吸収を
示す一方、400nm 以下の波長を有する紫外線を照射した
際、化学構造に変化を生じる為か、非可逆的に可視又は
近赤外線波長領域の光の吸収特性が減衰する性質を有す
る。
The above dye has a maximum absorption in the visible or near-infrared wavelength region of 700 to 1000 nm, and exhibits strong absorption in the visible or near-infrared wavelength region oscillation wavelength of laser light used for recording and reproduction, while having a wavelength of 400 nm or less. It has the property of irreversibly attenuating the absorption characteristics of light in the visible or near-infrared wavelength region, probably because the chemical structure is changed when it is irradiated with ultraviolet rays.

上記の色素は、例えばメタノール、エタノール、イソプ
ロパノール、ジメチルホルムアミド、ジメチルスルフォ
キサイド、テトラヒドロフラン、N−メチルピロリド
ン、アセトン、ジアセトンアルコール、アセチルアセト
ン、エチレングリコールモノメチルエーテル等の極性の
強い溶媒類に溶解し、一方これら極性溶剤に可溶な樹脂
成分例えばポリメタクリル酸メチル、ポリアクリル酸メ
チル等のアクリル樹脂類、例えばポリ酢酸ビニル、ポリ
プロピオン酸ビニル等のポリビニルアルコールエステル
類、例えばポリビニルホルマール、ポリビニルアセター
ル、ポリビニルブチラール、ポリメチルビニルエーテル
等のポリビニルアルコールエーテル類、ニトロセルロー
ス、酢酸セルロース、プロピオン酸セルロース等のセル
ロース誘導体類等を混合し基板材料に塗布して有機溶剤
を蒸発除去して記録層を形成する。上記、記録層中の染
料の含有量は通常0.1 〜10重量%であり記録層の厚み等
によって適宜選択される。
The above dyes are dissolved in strongly polar solvents such as methanol, ethanol, isopropanol, dimethylformamide, dimethylsulfoxide, tetrahydrofuran, N-methylpyrrolidone, acetone, diacetone alcohol, acetylacetone and ethylene glycol monomethyl ether. On the other hand, resin components soluble in these polar solvents, for example, polymethyl methacrylate, acrylic resins such as polymethyl acrylate, for example, polyvinyl acetate, polyvinyl alcohol esters such as polyvinyl propionate, such as polyvinyl formal, polyvinyl acetal, Polyvinyl butyral, polyvinyl alcohol ethers such as polymethyl vinyl ether, cellulose derivatives such as nitrocellulose, cellulose acetate, cellulose propionate, etc. It is applied to the combined substrate material forming the recording layer was evaporated to remove the organic solvent. The content of the dye in the recording layer is usually 0.1 to 10% by weight and is appropriately selected depending on the thickness of the recording layer and the like.

又、上記記録層中に、400nm 以下の波長を有する紫外線
によってラジカル又はカチオン等を発生するいわゆる光
増感剤を混合使用することも可能であり、この場合には
400nm 以下の波長の紫外線照射による可視〜近赤外線波
長領域の上記色素による吸収の減少がより助長され、す
なわち記録感度が向上する。光増感剤としては、例え
ば、 400nm以下の波長の紫外線照射によってフォトラジ
カルを発生する物質又はカチオンを発生する物質があ
り、フォトラジカルを発生する物質としては、例えばベ
ンゾフェノン、p−メチルベンゾフェノン、p−t−ブ
チルベンゾフェノン、メチルオルソベンゾイルベンゾエ
ート、オルソベンゾイルベンゾイックアシッド、4,4’
−ビスジメチルアミノベンゾフェノン、4,4’−ビスジ
エチルアミノベンゾフェノン、4−ジクロロアセチルベ
ンゾフェノン等のベンゾフェノン系増感剤;アセトフェ
ノン、2,2−ジエトキシアセトフェノン、p−タ−ジャ
リブチルトリクロロアセトフェノン等のアセトフェノン
系増感剤;2−ヒドロキシ−2−メチル−プロピオフェノ
ン、4’−イソプロピル−2−ヒドロキシ−2−メチルプ
ロピオフェノン等のプロピオフェノン類;ベンゾイン、
ベンゾインメチルエーテル、ベンゾインエチルエーテ
ル、ベンゾインイソプロピルエーテル、ベンゾインイソ
ブチルエーテル等のベンゾイン系増感剤;アントラキノ
ン、メチルアントラキノン、エチルアントラキノン等の
アントラキノン系増感剤;ベンジル、ベンジルジメチル
ケタール、ベンジルジエチルケタール等のベンジル系増
感剤;チオキサントン、2−クロロチオキサントン、2−
メチルチオキサントン、4−イソプロピルチオキサント
ン、2−アセチルチオキサントン等のチオキサントン系
増感剤;エチル4−ジメチルアミノベンゾエート、エチ
ル2−ジメチルアミノベンゾエート、2−(n−ブトキシ)
エチル4−ジメチルアミノヘンゾエート等の安息香酸エ
ステル系増感剤;アゾビスイソブチロニトリル、アゾビ
スバレロニトリル等のアゾニトリル類;ベンジルアジ
ド、オルソナフトキノンジアジド、ポリビニルベンジル
アジド、ポリビニルベンジルスルフォニルアジド等のア
ジド系増感剤等があげられる。これ等は単独で又は二種
以上併用して使用される。
It is also possible to mix and use a so-called photosensitizer that generates radicals or cations by ultraviolet rays having a wavelength of 400 nm or less in the recording layer.
The absorption of the dye in the visible to near-infrared wavelength region due to the irradiation of ultraviolet rays having a wavelength of 400 nm or less is further promoted, that is, the recording sensitivity is improved. The photosensitizer includes, for example, a substance that generates a photoradical or a substance that generates a cation upon irradiation with ultraviolet rays having a wavelength of 400 nm or less. Examples of the substance that generates a photoradical include benzophenone, p-methylbenzophenone, and p-methylbenzophenone. -T-butylbenzophenone, methylorthobenzoylbenzoate, orthobenzoylbenzoic acid, 4,4 '
-Bisdimethylaminobenzophenone, 4,4'-bisdiethylaminobenzophenone, 4-dichloroacetylbenzophenone and other benzophenone sensitizers; acetophenone, 2,2-diethoxyacetophenone, p-ta-jaributyltrichloroacetophenone and other acetophenone-based sensitizers Sensitizers; 2-hydroxy-2-methyl-propiophenone, propiophenones such as 4'-isopropyl-2-hydroxy-2-methylpropiophenone; benzoin,
Benzoin sensitizers such as benzoin methyl ether, benzoin ethyl ether, benzoin isopropyl ether, and benzoin isobutyl ether; anthraquinone sensitizers such as anthraquinone, methylanthraquinone, ethylanthraquinone; benzyl such as benzyl, benzyldimethylketal, and benzyldiethylketal Sensitizers; thioxanthone, 2-chlorothioxanthone, 2-
Thioxanthone-based sensitizers such as methylthioxanthone, 4-isopropylthioxanthone and 2-acetylthioxanthone; ethyl 4-dimethylaminobenzoate, ethyl 2-dimethylaminobenzoate, 2- (n-butoxy)
Benzoic acid ester-based sensitizers such as ethyl 4-dimethylaminohenzoate; azonitriles such as azobisisobutyronitrile and azobisvaleronitrile; benzyl azide, orthonaphthoquinone diazide, polyvinylbenzyl azide, polyvinylbenzyl sulfonyl azide, etc. Examples include azide-based sensitizers. These are used alone or in combination of two or more.

又、400nm 以下の波長の紫外線照射によりカチオンを発
生する増感剤としては、例えば(i)第Va族元素のオニ
ウム塩、(ii)第VIa 族元素のオニウム塩、(iii)芳
香族ハロニウム塩、(iv)芳香族ジアゾニウム塩等が用
いられる。
Examples of sensitizers that generate cations upon irradiation with ultraviolet light having a wavelength of 400 nm or less include (i) Group Va element onium salts, (ii) Group VIa element onium salts, and (iii) aromatic halonium salts. (Iv) aromatic diazonium salts and the like are used.

上記の如き光増感剤を使用する場合は、その量は通常、
記録層中に0.01〜5.0 重量%であることが好ましい。
When using a photosensitizer as described above, the amount is usually
It is preferably 0.01 to 5.0% by weight in the recording layer.

又、記録層の厚みは通常0.1 〜10μ好ましくは0.2 〜2
μであり、記録層の透過率は再生用レーザーの発振波長
において5〜50%に、染料の濃度及び厚みを調整する
ことが望ましく、特に記録層面に反射層を形成し、反射
光量で記録の再生時に信号を読む場合には透過率10〜50
%となるようにすることが好ましい。
The thickness of the recording layer is usually 0.1-10 .mu.m, preferably 0.2-2.
It is desirable to adjust the concentration and thickness of the dye so that the transmittance of the recording layer is 5 to 50% at the oscillation wavelength of the reproducing laser. Particularly, a reflective layer is formed on the surface of the recording layer and the amount of reflected light is used for recording. Transmittance 10 to 50 when reading signal during playback
% Is preferable.

記録層の支持体である基板は、例えばメタクリル樹脂、
ポリスチレン樹脂、ポリカードネート樹脂、ポリエステ
ル樹脂、ポリ塩化ビニル樹脂等の各種プラスチックの透
明なシート又はフィルムやガラス、透光性セラミック等
の透明無機板が通常用いられ、又鏡面を有する金属板又
は金属蒸着したプラスチックを反射層をかねて用いるこ
とも可能である。
The substrate that is the support of the recording layer is, for example, methacrylic resin,
Transparent sheets or films of various plastics such as polystyrene resin, polycardnate resin, polyester resin, polyvinyl chloride resin, etc., transparent inorganic plates such as glass, translucent ceramics, etc. are usually used, and metal plate or metal having a mirror surface. It is also possible to use vapor-deposited plastic as the reflective layer.

以上の如くして得られた記録層を有する本発明の記録媒
体は、400nm 以下の波長の紫外線露光により情報の書き
込みが行われる。
In the recording medium of the present invention having the recording layer obtained as described above, information is written by exposure to ultraviolet light having a wavelength of 400 nm or less.

すなわち、400nm 以下の波長の紫外線による露光を受け
た部分の読み出し用レーザーの発振波長に対応する600
〜1200nmの波長の吸収が、未露光部に比し減衰すること
により、信号が書き込まれるのである。
That is, 600 that corresponds to the oscillation wavelength of the reading laser in the portion that has been exposed to ultraviolet light having a wavelength of 400 nm or less.
The signal is written by the absorption at a wavelength of ~ 1200 nm being attenuated compared to the unexposed area.

書き込みに用いられる紫外線の光源としては、400nm 以
下特に200 〜400nm に発光スペクトルを有するものであ
ればいかなるものでもよく、例えば、水銀燈、ナトリウ
ム燈、セシウム燈、カドミウム燈、メタルハライドラン
プ、ヘリウムランプ、ネオンランプ、アルゴンランプ、
クリプトンランプ、クセノンランプ、クセノン−水銀ア
ークランプ、色素レーザー、エキシマレーザー等が用い
られる。また、400nm 以下の波長の紫外線或に発振波長
を有する上記のレーザー光をスポットビームに絞って、
記録層上を走査させ、信号の書き込みを行うことも可能
であるが、記録信号に対応するフォトマスクを介して密
着露光、投影露光等で400nm以下の波長の紫外線を露光
し、上記のごとく露光部の700 〜1000nmの吸収を未露光
部に比し減衰せしめることによって信号の書き込みを行
うことが特に同一情報を多数複製する生産性の点で特に
好ましい。
The ultraviolet light source used for writing may be any light source having an emission spectrum of 400 nm or less, particularly 200 to 400 nm, for example, a mercury lamp, sodium lamp, cesium lamp, cadmium lamp, metal halide lamp, helium lamp, neon lamp. Lamp, argon lamp,
A krypton lamp, a xenon lamp, a xenon-mercury arc lamp, a dye laser, an excimer laser, etc. are used. In addition, focusing the above laser light having an ultraviolet or oscillation wavelength of 400 nm or less to a spot beam,
Although it is possible to scan the recording layer and write signals, it is possible to perform exposure as described above by exposing to ultraviolet rays having a wavelength of 400 nm or less by contact exposure, projection exposure, etc. through a photomask corresponding to the recording signal. It is particularly preferable to write a signal by attenuating the absorption of 700 to 1000 nm of a part as compared with that of an unexposed part, particularly from the viewpoint of productivity for reproducing a large number of identical information.

以上のごとくして信号の書き込みを行った本発明の光記
録媒体から信号の読み出しを行うには、光記録媒体の記
録層中に含有する染料の吸収スペクトルに対応する発振
波長のレーザー光例えば半導体レーザーやヘリウムネオ
ンレーザー、YAGレーザー等、特に好ましくは半導体
レーザーのスポットビームを記録層上にあて、透過率や
反射率の変化を検出することによって信号を読み出し、
信号変調して畫像、音声等の再生を行うのである。
In order to read a signal from the optical recording medium of the present invention in which the signal is written as described above, a laser beam having an oscillation wavelength corresponding to the absorption spectrum of the dye contained in the recording layer of the optical recording medium, for example, a semiconductor A laser, a helium neon laser, a YAG laser, or the like, particularly preferably, a spot beam of a semiconductor laser is applied onto the recording layer, and a signal is read out by detecting a change in transmittance or reflectance,
The signal is modulated to reproduce the image, voice and the like.

なお、400nm 以下の波長の紫外線光による書き込み後に
記録層上に金属蒸着を施して反射層を形成し、透明な支
持基体側から反射光を用いて記録の読みだしを行うこと
も出来る。また、記録層上に金属蒸着のプライマーを施
すことや、金属蒸着層の保護被覆を行うこと、或いは二
枚の光記録媒体をはりあわせ両面板として使用すること
も可能である。
After writing with ultraviolet light having a wavelength of 400 nm or less, metal can be vapor-deposited on the recording layer to form a reflective layer, and recording can be read from the transparent supporting substrate side using reflected light. It is also possible to apply a metal vapor deposition primer on the recording layer, perform protective coating on the metal vapor deposition layer, or use two optical recording media as a laminated double-sided plate.

[実施例] 以下、実施例により、本発明の実施の態様をより具体的
に説明する。
[Examples] Hereinafter, embodiments of the present invention will be described more specifically with reference to Examples.

実施例1 の構造を有する染料1g及び、ポリビニルブチラール樹
脂19gを100 gのメタノールと20gのジメチルアセトア
ミドの混合液に溶解し、カートリッジ型フィルターで濾
過した後、100 μのポリエステルフィルムでスピンコー
ターを用いて塗布し、乾燥して0.6 μの厚さの記録層を
形成した。石英ガラス製のフォトマスクを通して500mj
の紫外線(高圧水銀灯、波長365nm)露光を行った後、
記録層面にアルミ蒸着を施して反射層を形成した。紫外
線露光部の半導体レーザー光(830nm)を用いた反射率
は55%、未露光部の反射率は25%であり、明瞭な信号を
うるに充分な反射率差が得られた。
Example 1 1 g of the dye having the structure of 1 and polyvinyl butyral resin 19 g are dissolved in a mixed solution of 100 g of methanol and 20 g of dimethylacetamide, filtered through a cartridge type filter, and then coated with a 100 μ polyester film using a spin coater. Then, it was dried to form a recording layer having a thickness of 0.6 μm. 500mj through a quartz glass photomask
After exposure to ultraviolet rays (high pressure mercury lamp, wavelength 365nm)
Aluminum was deposited on the surface of the recording layer to form a reflective layer. The reflectance of the ultraviolet-exposed area using semiconductor laser light (830 nm) was 55%, and the reflectance of the unexposed area was 25%, and a sufficient reflectance difference was obtained to obtain a clear signal.

比較例1 実施例1において用いられた色素の代りにビス(1,2,3,
4−テトラクロロ−5,6−ジチオフェノレート)ニッケル
(II)テトラ−n−ブチルアンモニウムを用いる以外は
実施例1と全く同様に記録層の形成及び紫外線露光、反
射層形成を行った。半導体レーザー光(830nm )を用い
た紫外線露光部の反射率は38%、未露光部の反射率は28
%であり、明瞭な信号をうるに十分な反射率差は得られ
なかった。
Comparative Example 1 Instead of the dye used in Example 1, bis (1,2,3,
The recording layer formation, the ultraviolet exposure and the reflection layer formation were performed in exactly the same manner as in Example 1 except that 4-tetrachloro-5,6-dithiophenolate) nickel (II) tetra-n-butylammonium was used. The reflectance of the UV-exposed area using semiconductor laser light (830 nm) is 38%, and the reflectance of the unexposed area is 28%.
%, A sufficient reflectance difference was not obtained to obtain a clear signal.

次に同じようにして1500mj 、すなわち実施例1での150
0mj に対してはるかに過大な紫外線露光を行い反射層を
形成した。露光部の半導体レーザー光(830nm )を用い
た反射率は53%、未露光部の反射率は28%であり、よう
やく明瞭な信号をうるに十分な反射率差が得られた。
Then, in the same manner, 1500 mj, that is, 150 in the first embodiment.
A much larger UV exposure was applied to 0 mj to form a reflective layer. The reflectance of the exposed portion using the semiconductor laser beam (830 nm) was 53%, and the reflectance of the unexposed portion was 28%, and a reflectance difference sufficient to obtain a clear signal was finally obtained.

実施例2 実施例1で用いた染料のかわりに、 の構造を有する染料を用いた以外は、実施例1と全く同
様に記録層の形成及び紫外線露光、反射層形成を行っ
た。半導体レーザー光(830nm )を用いた紫外線露光部
の反射率は60%、未露光部の反射率は30%であり、明瞭
な信号をうるに十分な反射率差が得られた。
Example 2 Instead of the dye used in Example 1, The recording layer formation, the UV exposure and the reflection layer formation were performed in exactly the same manner as in Example 1 except that the dye having the structure of was used. The reflectance of the UV-exposed portion using the semiconductor laser light (830 nm) was 60%, and the reflectance of the unexposed portion was 30%, and a sufficient reflectance difference was obtained to obtain a clear signal.

実施例3 実施例1の記録層形成用溶液に0.5 gにベンゾインエチ
ルエーテルを加えて全く同様にして記録層の形成、紫外
線露光、反射層形成を行った。実施例1と同様な評価に
おいて露光部反射率65%、未露光部反射率25%であり、
明瞭な信号をうるに十分な反射率差が得られた。
Example 3 0.5 g of benzoin ethyl ether was added to the recording layer forming solution of Example 1 to form a recording layer, ultraviolet exposure and reflection layer formation in the same manner. In the same evaluation as in Example 1, the exposed portion reflectance was 65% and the unexposed portion reflectance was 25%.
A sufficient reflectance difference was obtained to obtain a clear signal.

実施例4 実施例2で用いた染料1g、メタクリル酸メチル−メタ
クリン酸グリシジル共重合樹脂10g、トリフェニルスル
フォニウムヘキサフルオロアンチモネート0.2 gをエチ
レングリコールモノメチルエーテル100 gとジメチルホ
ルムアミド50gの混合溶媒に溶解し濾過した後、実施例
1と同様にして記録層の形成、紫外線露光、反射層形成
を行った。実施例1と同様な評価において露光部反射率
52%、未露光部反射率23%であり、明瞭な信号をうるに
十分な反射率差が得られた。
Example 4 1 g of the dye used in Example 2, 10 g of methyl methacrylate-glycidyl methacrylate copolymer resin, 0.2 g of triphenylsulfonium hexafluoroantimonate were dissolved in a mixed solvent of 100 g of ethylene glycol monomethyl ether and 50 g of dimethylformamide. After filtering and filtering, the recording layer formation, ultraviolet exposure and reflection layer formation were carried out in the same manner as in Example 1. In the same evaluation as in Example 1, the exposed portion reflectance
The reflectance was 52% and the reflectance of the unexposed area was 23%, which was sufficient to obtain a clear signal.

[発明の効果] 記録層に含有させる色素を特定することにより、特開昭
57−195336及び特開昭57−195341に記
載された光記録システム及び光記録媒体を用いる場合に
比して優れた記録感度をもって光記録を行うことができ
る。
[Effect of the Invention] By specifying the dye to be contained in the recording layer, it is superior to the case of using the optical recording system and the optical recording medium described in JP-A-57-195336 and 57-195341. Optical recording can be performed with recording sensitivity.

また、1μm以下の小さい記録ビットを、スタンパーを
用いて成形時に形成することがないので、高価な精密成
形機を必要とせず、成形材料の材質的制約がなく、スタ
ンパーの目づまりもない。本発明の光記録方法はCD−
WO、光テープ、光カードなどに好適に使用できる。
Further, since a small recording bit of 1 μm or less is not formed at the time of molding using a stamper, an expensive precision molding machine is not required, there is no restriction on the material of the molding material, and there is no clogging of the stamper. The optical recording method of the present invention is a CD-
It can be suitably used for WO, optical tape, optical card and the like.

フロントページの続き (56)参考文献 特開 昭57−195336(JP,A) 特開 昭58−112794(JP,A)Continuation of front page (56) Reference JP-A-57-195336 (JP, A) JP-A-58-112794 (JP, A)

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】一般式(I) [式(I)中、Yは、−H、−SO3 、−SO3H、−SO3Na
または−SO3Kであり、lは1〜4の整数であり、Y′
は−H、−SO3H、−SO3Na または−SO3Kであり、nは1
〜4の整数であり、mは3または4であり、X はハロ
ゲンイオン、ClO4またはBFで表わされる1価の陰イオ
ンであり、Yが−SO3 であるときにはX は存在しな
い]の構造を有する色素を含有する記録層を有する光記
録媒体を使用する光記録方法であって、上記記録層に40
0nm以下の波長を有する紫外線を照射して被照射部分に
おける再生用レーザー光の吸収を減じせしめることによ
り書き込みが行われることを特徴とする光記録方法。
1. A general formula (I)[In Formula (I), Y is -H, -SO3 , -SO3H, −SO3Na
 Or −SO3K, l is an integer of 1 to 4, Y '
Is -H, -SO3H, −SO3Na or −SO3K and n is 1
Is an integer from 4 to 4, m is 3 or 4, X Is halo
Gen ion, ClOFourOr BFIMonovalent anion represented by
And Y is -SO3 X when Does not exist
Optical recording having a recording layer containing a dye having a structure
An optical recording method using a recording medium, comprising:
Irradiate ultraviolet rays with a wavelength of 0 nm or less to the irradiated area
By reducing the absorption of the reproduction laser light in
The optical recording method is characterized in that writing is performed.
JP59081117A 1984-04-24 1984-04-24 Optical recording method Expired - Lifetime JPH0632996B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59081117A JPH0632996B2 (en) 1984-04-24 1984-04-24 Optical recording method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59081117A JPH0632996B2 (en) 1984-04-24 1984-04-24 Optical recording method

Publications (2)

Publication Number Publication Date
JPS60226036A JPS60226036A (en) 1985-11-11
JPH0632996B2 true JPH0632996B2 (en) 1994-05-02

Family

ID=13737430

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59081117A Expired - Lifetime JPH0632996B2 (en) 1984-04-24 1984-04-24 Optical recording method

Country Status (1)

Country Link
JP (1) JPH0632996B2 (en)

Families Citing this family (5)

* 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
JPH0798421B2 (en) * 1987-06-09 1995-10-25 富士写真フイルム株式会社 Optical information recording medium
JP2961738B2 (en) * 1988-12-19 1999-10-12 ソニー株式会社 Manufacturing method of optical information recording medium
US5273800A (en) * 1989-04-28 1993-12-28 Jujo Paper Co., Ltd. Optical recording medium
JP2524398B2 (en) * 1989-04-28 1996-08-14 日本製紙株式会社 Optical recording material

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6023996B2 (en) * 1980-06-26 1985-06-10 三井東圧化学株式会社 Composition for laser light recording/reading media
JPS57195336A (en) * 1981-05-26 1982-12-01 Mitsui Toatsu Chem Inc Recording and record reading method and recorded body
JPS58114989A (en) * 1982-12-06 1983-07-08 Ricoh Co Ltd Light information recording member
JPS58194595A (en) * 1982-05-10 1983-11-12 Canon Inc Optical recording medium
JPS58218055A (en) * 1982-06-14 1983-12-19 Ricoh Co Ltd Optical information recording medium
JPS5924690A (en) * 1982-07-31 1984-02-08 Tdk Corp Optical recording medium
JPS5955795A (en) * 1982-09-27 1984-03-30 Tdk Corp Optical recording medium
JPS5924692A (en) * 1982-07-30 1984-02-08 Tdk Corp Optical recording medium
JPS5984356A (en) * 1982-11-05 1984-05-16 Ricoh Co Ltd Manufacture of optical disk master
JPH0613238B2 (en) * 1982-11-08 1994-02-23 株式会社リコー Optical information recording medium
JPS59202892A (en) * 1983-05-04 1984-11-16 Ricoh Co Ltd Optical information recording medium

Also Published As

Publication number Publication date
JPS60226036A (en) 1985-11-11

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