JPH0725204B2 - Optical information recording carrier - Google Patents
Optical information recording carrierInfo
- Publication number
- JPH0725204B2 JPH0725204B2 JP61144249A JP14424986A JPH0725204B2 JP H0725204 B2 JPH0725204 B2 JP H0725204B2 JP 61144249 A JP61144249 A JP 61144249A JP 14424986 A JP14424986 A JP 14424986A JP H0725204 B2 JPH0725204 B2 JP H0725204B2
- Authority
- JP
- Japan
- Prior art keywords
- recording layer
- cyanine dye
- optical information
- information recording
- nickel
- 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
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
- G11B7/249—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 organometallic compounds
- G11B7/2492—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 organometallic compounds neutral compounds
-
- 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
- G11B7/253—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
- G11B7/2533—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 resins
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】 技術分野 本発明は、有機色素薄膜を有する追記型光学式情報記録
担体に関する。TECHNICAL FIELD The present invention relates to a write-once type optical information recording carrier having an organic dye thin film.
背景技術 従来から、追記型光学式情報記録担体としては、円形基
板上に設けられたTe等の金属薄膜の記録層にレーザ光を
利用して信号を記録するものがあり、追記型光ディスク
として実用化されている。BACKGROUND ART Conventionally, as a write-once type optical information record carrier, there is a write-once type optical information recording carrier that records a signal on a recording layer of a metal thin film such as Te provided on a circular substrate by using a laser beam, and is practically used as a write-once type optical disc. Has been converted.
一方、他の追記型光ディスクでは、記録層に有機系色
素、特にシアニン色素を含んだ薄膜を用いるものも特開
昭60−103532に開示されている。かかる光ディスクは第
２図の概略断面図に示されるものである。すなわち、サ
ブストレート１は、PMMA等のアクリル酸樹脂より形成さ
れた円形基板であって、その上に同心円状又は渦巻状に
整列した微細なプリアドレス及びプリグルーブが形成さ
れている。シアニン色素を含んだ溶液をサブストレート
１のプリアドレス、プリグルーブ面上にスピンコート法
により均一に被膜し、被膜面を乾燥させ記録層２を形成
する。記録層２を保護するために記録層２を有したサブ
ストレート１上に間隙３を保ってスペーサ６を介して保
護板４を貼り合わせて追記型光ディスクを得る。On the other hand, in another write-once type optical disc, one using a thin film containing an organic dye, especially a cyanine dye in a recording layer is also disclosed in JP-A-60-103532. Such an optical disc is shown in the schematic sectional view of FIG. That is, the substrate 1 is a circular substrate made of acrylic acid resin such as PMMA, on which fine pre-addresses and pre-grooves that are aligned concentrically or spirally are formed. A solution containing a cyanine dye is uniformly coated on the pre-address and pre-groove surfaces of the substrate 1 by a spin coating method, and the coating surface is dried to form the recording layer 2. A write-once optical disc is obtained by bonding a protective plate 4 via a spacer 6 on a substrate 1 having the recording layer 2 to protect the recording layer 2 with a gap 3 therebetween.
また、第３図の如き記録層２を有する一対のサブストレ
ート１を補強板７で担持したエアーサンドイッチ密閉構
造の両面光ディスクも提案されている。A double-sided optical disk having an air sandwich hermetically sealed structure in which a pair of substrates 1 having a recording layer 2 as shown in FIG. 3 are carried by a reinforcing plate 7 has also been proposed.
かかる従来の光ディスクの記録層２はシアニン色素から
なる薄膜であって、その表面はブロンズ光沢若しくは金
属光沢を有し再生時の弱いレーザ光を反射するのに都合
が良い記録層である。シアニン色素の薄膜は所定パワー
の半導体レーザ光を吸収して昇華する故に、記録時のレ
ーザ光ビームの照射によるピットの形成する記録層とし
ての機能を有する。また、シアニン色素の薄膜は可撓性
に優れ、金属膜のように温度変化によるひびが入りにく
い。このような利点を有する故にシアニン色素単成分に
よる単一薄膜の記録層が形成された光ディスクが開発さ
れていた。The recording layer 2 of such a conventional optical disc is a thin film made of a cyanine dye, and the surface thereof has a bronze luster or a metallic luster and is a recording layer which is convenient for reflecting a weak laser beam at the time of reproduction. Since the thin film of cyanine dye absorbs semiconductor laser light of a predetermined power and sublimes, it has a function as a recording layer in which pits are formed by irradiation with a laser light beam during recording. Further, the thin film of the cyanine dye is excellent in flexibility and is unlikely to be cracked due to temperature change like a metal film. Due to these advantages, an optical disk having a single thin film recording layer formed of a single cyanine dye component has been developed.
しかしながら、シアニン色素のみからなる薄膜の記録層
を用いた光ディスクでは、書込み記録後、読出し時の弱
いレーザ光で又は取扱時における日光などで光劣化が起
こるために、繰返し読出し再生に耐えられない。However, an optical disk using a thin recording layer made of only a cyanine dye cannot withstand repeated reading and reproducing because, after writing and recording, photodegradation occurs due to weak laser light during reading or due to sunlight during handling.
そこで、シアニン色素に光劣化を抑える物質を混合する
ことが考えられ、その物質としてベンゼンチオールニッ
ケル錯体が挙げられる。ベンゼンチオールニッケル錯体
は、特開昭57−11090号公報に示されているように、800
〜950nmの領域に吸収波長を有する物質であり、記録に
要するレーザ光を吸収して熱に変換する作用の強い色素
であるからである。従って、ベンゼンチオールニッケル
錯体の記録薄膜として混合することは、有機系色素をレ
ーザ光で昇華させることを補助するのに適している。Therefore, it may be considered to mix a cyanine dye with a substance that suppresses photodegradation, and a benzenethiol nickel complex may be mentioned as the substance. The benzenethiol nickel complex has a structure of 800-800 as disclosed in JP-A-57-11090.
This is because it is a substance that has an absorption wavelength in the region of up to 950 nm and is a dye that has a strong action of absorbing the laser light required for recording and converting it into heat. Therefore, mixing the benzenethiol nickel complex as a recording thin film is suitable for assisting the sublimation of the organic dye by laser light.
しかしながら、このベンゼンチオールニッケル錯体及び
シアニン色素による従来の混合物を用いても、記録しピ
ットを形成した光ディスクでは、読出しを繰返す場合
に、その読出しが不可能となることがある。However, even if the conventional mixture of the benzenethiol nickel complex and the cyanine dye is used, the reading may be impossible when the reading is repeated in the optical disc on which the pits are recorded and formed.
このことは、第４図の拡大断面図に示すように、光ディ
スクではレーザ光を案内するためのプリアドレス部ａ及
びプリグルーブ部ｂが予めサブストレート１に設けら
れ、その上に信号記録層が被覆してある故に、プリアド
レス部ａの反射率が低下してピット及び非ピットの反射
光の差が減少してしまうのでその反射光が十分でなく、
ピット及び非ピットが検出できなくなることに原因があ
った。プリグルーブ部ｂでのピットは記録層が穿孔して
いるために、反射率が減少しても反射の有無である程度
までピットを検出できる。This means that, as shown in the enlarged sectional view of FIG. 4, in the optical disc, the pre-address part a and the pre-groove part b for guiding the laser beam are provided in advance on the substrate 1, and the signal recording layer is formed thereon. Since it is covered, the reflectance of the pre-address part a is reduced and the difference between the reflected light of the pit and the non-pit is reduced, so that the reflected light is not sufficient,
The cause was that pits and non-pits could not be detected. Since the pits in the pre-groove part b are perforated in the recording layer, the pits can be detected to some extent depending on the presence or absence of reflection even if the reflectance decreases.
かかる読出し用レーザ光による既記録光ディスクの繰返
し耐久性すなわち繰返し読出し可能回数を示すグラフを
第５図に示す。グラフ縦軸には繰返し読出し可能回数
を、グラフ横軸にはレーザ光の再生パワーをとってい
る。ディスクの再生線速度は2.36m/秒であった。実線Ａ
はプリアドレス部ａにおける記録層の耐久性を示し、実
線Ｂはプリグルーブ部ｂにおける記録層の耐久性を示し
ている。すなわち、プリグルーブ部ｂではレーザ光によ
る記録層の破壊により、プリアドレス部ａでは光劣化に
よる記録層の反射率の低下により読出し可能回数が制限
されている。従って、ピット列が形成されているプリグ
ルーブ部ｂでは読出しパワーを低くおさえれば良いが、
プリアドレス部ａでは約300万回程度の読出し可能回数
で光劣化が始まっており、アドレス信号を識別するだけ
の反射量の差を確保できないことが明らかとなった。FIG. 5 is a graph showing the repetitive durability of the recorded optical disk by the reading laser beam, that is, the number of times of repetitive reading. The vertical axis of the graph represents the number of times that repeated reading is possible, and the horizontal axis of the graph represents the reproduction power of laser light. The playback linear velocity of the disc was 2.36 m / sec. Solid line A
Shows the durability of the recording layer in the pre-address part a, and the solid line B shows the durability of the recording layer in the pre-groove part b. That is, the pre-groove portion b limits the number of times the data can be read due to the destruction of the recording layer by the laser beam, and the pre-address portion a due to the deterioration of the reflectance of the recording layer due to the light deterioration. Therefore, in the pre-groove part b in which the pit row is formed, the read power may be kept low.
It has been clarified that the pre-address part a has started to undergo photodegradation after about 3 million times of readable times, and it is not possible to secure a difference in reflection amount enough to identify an address signal.
近年では、有機系色素を用いた追記用光ディスクの実用
に際しては、さらに高い読出し可能回数を維持するも
の、すなわち耐光劣化性を有する光ディスクが要求され
ている。In recent years, in practical use of a write-once optical disc using an organic dye, a disc capable of maintaining a higher readable count, that is, an optical disc having light deterioration resistance is required.
発明の概要 本発明の目的は、上記した問題を解決し金属光沢を維持
しつつ耐光劣化性に優れた情報記録担体を提供すること
である。SUMMARY OF THE INVENTION It is an object of the present invention to provide an information record carrier which solves the above-mentioned problems and which is excellent in resistance to light deterioration while maintaining metallic luster.
本発明の光学式情報記録担体は、透明な円形基板と、前
記基板上に形成された信号記録層からなる光学式情報記
録担体であって、前記信号記録層は、インドシアニング
リーンと、 で示されるビス（４−ジエチルアミノジチオベンジル）
ニッケルとの混合物からなることを特徴とする。The optical information recording carrier of the present invention is a transparent circular substrate, an optical information recording carrier comprising a signal recording layer formed on the substrate, the signal recording layer is indocyanine green, Bis (4-diethylaminodithiobenzyl) represented by
It is characterized by comprising a mixture with nickel.
実 施 例 本発明者は、上記した耐光劣化性を有する物質について
研究を行なった結果、半導体レーザ発振波長領域に吸収
特性を有するシアニン色素とその色素を溶解する溶媒と
に相溶性があり、且かかる波長領域の光を吸収してシア
ニン色素の光劣化を妨げる効果を有するものを見出し、
本発明に至った。Example The present inventor, as a result of research on the above-mentioned substance having resistance to light deterioration, showed that the cyanine dye having absorption characteristics in a semiconductor laser oscillation wavelength region and a solvent dissolving the dye are compatible with each other, and Finding one having an effect of absorbing light in such a wavelength region to prevent photodegradation of the cyanine dye,
The present invention has been completed.
シアニン色素は、下記（Ｉ）式で示されるインドシアニ
ングリーンである。The cyanine dye is indocyanine green represented by the following formula (I).
これは半導体レーザ発振波長領域に吸収特性を有する。 It has absorption characteristics in the semiconductor laser oscillation wavelength region.
本実施例における波長領域の光を吸収してシアニン色素
の光劣化を妨げる効果有する物質は、下記（II）式で示
されるビス（４−ジエチルアミノジチオベンジル）ニッ
ケルである。The substance having an effect of absorbing light in the wavelength region and preventing the photodegradation of the cyanine dye in this example is bis (4-diethylaminodithiobenzyl) nickel represented by the following formula (II).
ビス（４−ジエチルアミノジチオベンジル）ニッケル
は、再生光によって励起され分解を起そうとするシアニ
ンの励起状態を電子的に吸引し自己に取り込むことによ
りそのシアニンの分解を抑えることができるいわゆるク
エンチャ（消光剤）の働きをなしていると推定され、そ
の効果は大きい。ビス（４−ジエチルアミノジチオベン
ジル）ニッケルは、ベンゼンジチオールニッケル錯体よ
りも光吸収、励起状態の脱活等の光学反応性が大である
と考えられるからである。 Bis (4-diethylaminodithiobenzyl) nickel is a so-called quencher (quenching) that can suppress the decomposition of cyanine by electronically attracting the excited state of cyanine which is excited by regeneration light and is about to cause decomposition, and taking it into itself. It is presumed that it acts as a drug, and its effect is great. This is because bis (4-diethylaminodithiobenzyl) nickel is considered to have greater optical reactivity such as light absorption and deactivation of excited state than benzenedithiol nickel complex.
以下、本発明の一実施例を図面によって説明する。An embodiment of the present invention will be described below with reference to the drawings.
シアニン色素及びビス（４−ジエチルアミノジチオベン
ジル）ニッケルの溶液としてスピンコート法を用いてPM
MA円形基板に信号記録層を形成する通常の製造方法で種
々の光ディスクを作成してその特性を調べた。シアニン
色素はインドシアニングリーン（MERCK No.4839 9th E
d.）を用いると良好な結果を得られることが確認され
た。PM as a solution of cyanine dye and bis (4-diethylaminodithiobenzyl) nickel by spin coating
Various optical discs were prepared by the usual manufacturing method in which the signal recording layer was formed on the MA circular substrate, and their characteristics were investigated. Cyanine dye is indocyanine green (MERCK No.4839 9th E
It was confirmed that good results could be obtained by using d.).
実験を繰返した結果、通常の単一成分で使用する場合の
シアニン色素溶液に対して濃度0.4mg/ccないし1.3mg/cc
の範囲でビス（４−ジエチルアミノジチオベンジル）ニ
ッケルを混合してある程度の効果がえられたが、1.0mg/
ccが最も好ましい濃度であることが確認された。0.4mg/
cc未満の混合では耐光劣化性を示さなっかた。1.3mg/cc
より大なるの混合ではシアニン色素溶液に対する溶解度
を越えビス（４−ジエチルアミノジチオベンジル）ニッ
ケルは不溶となった。As a result of repeating the experiment, the concentration was 0.4 mg / cc to 1.3 mg / cc with respect to the cyanine dye solution when used as a normal single component.
Bis (4-diethylaminodithiobenzyl) nickel was mixed in the range of 1.0 to 1.0 to give some effect, but 1.0 mg /
It was confirmed that cc was the most preferable concentration. 0.4 mg /
When it was mixed with less than cc, it did not show light deterioration resistance. 1.3 mg / cc
At higher mixing, the solubility in the cyanine dye solution was exceeded and bis (4-diethylaminodithiobenzyl) nickel became insoluble.
シアニン色素溶液に対してビス（４−ジエチルアミノジ
チオベンジル）ニッケルの濃度1.0mg/ccのものを信号記
録層とした光ディスクに所定の信号を記録し、その後、
読出し用レーザ光による既記録光ディスクの繰返し耐久
性すなわち繰返し読出し可能回数を示すグラフを第１図
に示す。グラフ縦軸には繰返し読出し可能回数を、グラ
フ縦軸にはレーザ光の再生パワーをとっている。ディス
クの再生線速度は2.36m/秒であった。実線Ａはプリアド
レス部ａにおける信号記録層の耐久性を示し、実線Ｂは
プリグルーブ部ｂにおける記録層の耐久性を示してい
る。グラフから明らかなように、予め設けられている案
内用のピット列が形成されているプリアドレス部ａでは
約1700万回程度の読出し可能回数から光劣化が始まって
おり、その信号記録層においてアドレス信号を識別する
だけの反射を確保されていることが分る。A predetermined signal was recorded on an optical disc having a bis (4-diethylaminodithiobenzyl) nickel concentration of 1.0 mg / cc for the cyanine dye solution as a signal recording layer, and thereafter,
FIG. 1 is a graph showing the repetitive durability of the already-recorded optical disk by the reading laser beam, that is, the number of times of repetitive reading. The vertical axis of the graph represents the number of times that repeated reading is possible, and the vertical axis of the graph represents the reproduction power of laser light. The playback linear velocity of the disc was 2.36 m / sec. The solid line A shows the durability of the signal recording layer in the pre-address part a, and the solid line B shows the durability of the recording layer in the pre-groove part b. As is clear from the graph, in the pre-address part a in which the guide pit row provided in advance is formed, the photodegradation starts from the number of times the data can be read out about 17 million times, and the address in the signal recording layer is started. It can be seen that the reflection is secured enough to identify the signal.
また、本実施例においてPMMAのサブストレートを使用し
ているが、ガラス、アクリル樹脂、ビニル樹脂、ポリエ
ーテル樹脂、エポキシ樹脂、ポリカーボネート樹脂、ポ
リブチラール樹脂、セルロースアセテートブチレート樹
脂、ニトロセルロース樹脂などから選ばれる材料によっ
て成形されるサブストレートを使用しても良い。Although the substrate of PMMA is used in this example, it is made of glass, acrylic resin, vinyl resin, polyether resin, epoxy resin, polycarbonate resin, polybutyral resin, cellulose acetate butyrate resin, nitrocellulose resin, or the like. It is also possible to use a substrate formed of a selected material.
効果 上記したように本発明によれば、信号記録層として半導
体発振波長領域に吸収特性を有するシアニン色素とビス
（４−ジエチルアミノジチオベンジル）ニッケルとの混
合物の薄膜を使用している故に、耐光劣化性に優れかつ
長期に亘って安定した有機系色素追記型光ディスクが得
られる。Effect As described above, according to the present invention, since a thin film of a mixture of a cyanine dye having an absorption characteristic in a semiconductor oscillation wavelength region and bis (4-diethylaminodithiobenzyl) nickel is used as a signal recording layer, light resistance deterioration is caused. It is possible to obtain an organic dye write-once type optical disc having excellent properties and stable for a long period of time.
第１図は本発明の光ディスクの読出し用レーザ光による
既記録光ディスクの繰返し耐久性を示すグラフであり、
第２図は従来の片面光ディスクの部分断面拡大図であ
り、第３図は従来の両面光ディスクの部分断面拡大図で
あり、第４図は光ディスクのプリアドレス、プリグルー
ブを説明する説明図であり、第５図は従来の光ディスク
の読出し用レーザ光による既記録光ディスクの繰返し耐
久性を示すグラフである。 主要部分の符号の説明 １……ガイドラック付PMMAサブストレート ２……シアニン色素記録層 ３……間隙 ４……保護板 ６……スペーサFIG. 1 is a graph showing the repetitive durability of an already recorded optical disk by a reading laser beam of the optical disk of the present invention,
2 is a partially enlarged sectional view of a conventional single-sided optical disk, FIG. 3 is a partially enlarged sectional view of a conventional double-sided optical disk, and FIG. 4 is an explanatory diagram for explaining pre-address and pre-groove of the optical disk. FIG. 5 is a graph showing the repetitive durability of a recorded optical disk by a reading laser beam of a conventional optical disk. Explanation of symbols for main parts 1 …… PMMA substrate with guide rack 2 …… Cyanine dye recording layer 3 …… Gap 4 …… Protection plate 6 …… Spacer
Claims (1)
た信号記録層からなる光学式情報記録担体であって、前
記信号記録層は、インドシアニングリーンと、構造式
が、 で示されるビス（４−ジエチルアミノジチオベンジル）
ニッケルとの混合物からなることを特徴とする光学式情
報記録担体。1. An optical information recording carrier comprising a transparent circular substrate and a signal recording layer formed on the substrate, wherein the signal recording layer has indocyanine green and a structural formula: Bis (4-diethylaminodithiobenzyl) represented by
An optical information recording carrier comprising a mixture with nickel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61144249A JPH0725204B2 (en) | 1986-06-20 | 1986-06-20 | Optical information recording carrier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61144249A JPH0725204B2 (en) | 1986-06-20 | 1986-06-20 | Optical information recording carrier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS631594A JPS631594A (en) | 1988-01-06 |
| JPH0725204B2 true JPH0725204B2 (en) | 1995-03-22 |
Family
ID=15357706
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61144249A Expired - Lifetime JPH0725204B2 (en) | 1986-06-20 | 1986-06-20 | Optical information recording carrier |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0725204B2 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5482822A (en) * | 1992-05-12 | 1996-01-09 | Canon Kabushiki Kaisha | Infrared-absorptive compound and optical recording medium making use of the same |
| EP0860821B1 (en) * | 1997-02-24 | 2002-11-27 | Fuji Electric Co., Ltd. | Optical recording medium |
| JPH10283672A (en) * | 1997-04-08 | 1998-10-23 | Sony Corp | Optical recording medium |
| US6103331A (en) * | 1997-09-26 | 2000-08-15 | Fuji Electric Co., Ltd. | Optical recording medium comprising organic dye thin film |
| JP3097628B2 (en) * | 1997-11-11 | 2000-10-10 | 富士電機株式会社 | Optical recording medium |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0630961B2 (en) * | 1982-11-02 | 1994-04-27 | ティーディーケイ株式会社 | Optical recording medium |
-
1986
- 1986-06-20 JP JP61144249A patent/JPH0725204B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS631594A (en) | 1988-01-06 |
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