JPH0911619A - Optical recording medium and production thereof - Google Patents
Optical recording medium and production thereofInfo
- Publication number
- JPH0911619A JPH0911619A JP7163441A JP16344195A JPH0911619A JP H0911619 A JPH0911619 A JP H0911619A JP 7163441 A JP7163441 A JP 7163441A JP 16344195 A JP16344195 A JP 16344195A JP H0911619 A JPH0911619 A JP H0911619A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- organic compound
- recording medium
- thermal decomposition
- oxidizing agent
- 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.)
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Links
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- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、レーザー光によって情
報の記録・再生が可能な光記録媒体の中で、特に、記録
層に色素等の有機化合物を用いた光記録媒体とその製造
方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording medium capable of recording and reproducing information by laser light, and more particularly to an optical recording medium using an organic compound such as a dye in a recording layer and a method for producing the same. It is a thing.
【０００２】[0002]
【従来の技術】近年、レーザー光を用いて情報を記録再
生する光記録媒体として、基板上に記録膜を形成し、そ
の上に反射膜さらには保護膜を構成するものが種々ある
が、その一つに色素等の有機化合物で記録膜を形成する
ものがある。これは、レーザー光を基板側から記録膜に
照射すると、レーザー光が記録膜に一部透過吸収され、
照射部分が局部的に加熱され、溶融、蒸発、昇華または
分解等の物理的あるいは化学的変化が生じることによ
り、ピットを形成し、情報を記録するものである。2. Description of the Related Art In recent years, there are various optical recording media for recording and reproducing information using laser light, in which a recording film is formed on a substrate and a reflective film and a protective film are formed on the recording film. One is to form a recording film with an organic compound such as a dye. This is because when the recording film is irradiated with laser light from the substrate side, the laser light is partially transmitted and absorbed by the recording film,
The irradiated portion is locally heated and a physical or chemical change such as melting, evaporation, sublimation or decomposition occurs to form a pit and record information.
【０００３】こうしてできあがったピット情報は、それ
以外の部分と光学特性が変化するので、記録時より弱い
パワーのレーザー光を照射することにより再生される。Since the pit information thus formed has optical characteristics different from those of the other portions, it can be reproduced by irradiating a laser beam with a power weaker than that during recording.
【０００４】ここで、記録膜に用いられる色素等の有機
化合物に必要な要素は、一つには、記録再生に使用する
波長のレーザー光に、ある程度の透過、吸収、反射を有
すること、二つには、そのときのレーザー光の波長と記
録パワーとで加熱され、溶融または分解して物理的・化
学的変化を起こすことである。Here, one of the elements necessary for an organic compound such as a dye used for a recording film is that it has a certain degree of transmission, absorption, and reflection with respect to a laser beam having a wavelength used for recording and reproduction. One is that the laser beam is heated by the wavelength of the laser beam and the recording power at that time, and is melted or decomposed to cause a physical / chemical change.
【０００５】以下に従来の記録膜を構成する色素等の有
機化合物について説明する。従来の有機化合物には、上
記２つの要素を満足するため、その分子設計は、分光特
性（光吸収率・透過率・反射率）と熱分解点の二つの観
点が必要となる。Organic compounds such as dyes that constitute conventional recording films will be described below. Since the conventional organic compound satisfies the above two factors, its molecular design requires two viewpoints of spectral characteristics (light absorption rate / transmittance / reflectance) and thermal decomposition point.
【０００６】ここで、レーザー光の記録パワーがある範
囲で規定されている場合（例えば、ＣＤ規格準拠のプレ
ーヤーで記録するためには、４〜８ｍＷとなる）には、
記録膜を構成する有機化合物は、その波長での分光特性
と熱特性の両立が必要となる。また、その熱分解点が３
００℃未満では、規定されたレーザー光の光吸収と記録
パワーで加熱分解し、ピットを形成し、それを再生する
ことができる。Here, when the recording power of the laser light is specified within a certain range (for example, it is 4 to 8 mW for recording by a player conforming to the CD standard),
The organic compound that constitutes the recording film needs to have both spectral characteristics and thermal characteristics at the wavelength. The thermal decomposition point is 3
When the temperature is lower than 00 ° C., the pits can be formed and regenerated by thermal decomposition with the specified laser light absorption and recording power.
【０００７】一方、この記録膜を形成する方法は、大別
すると蒸着法と溶媒塗布法とが知られている。前者は、
真空蒸着法、スパッタ法などであり、形成する有機化合
物を加熱することによりこれを蒸発または昇華させ、有
機化合物そのものを基板に付着させる。後者は、スピン
コート法、ＬＢ膜法、スクリーン印刷などであり、有機
化合物を溶剤に溶解した液を基板上に形成した後、溶剤
を蒸発乾燥させるのが一般的である。On the other hand, the methods for forming this recording film are roughly classified into vapor deposition and solvent coating. The former is
A vacuum vapor deposition method, a sputtering method, or the like is used. When an organic compound to be formed is heated, it is evaporated or sublimated, and the organic compound itself is attached to a substrate. The latter is a spin coating method, an LB film method, screen printing or the like, and it is common to evaporate and dry the solvent after forming a liquid in which an organic compound is dissolved in a solvent on a substrate.
【０００８】[0008]
【発明が解決しようとする課題】しかしながら上記の従
来の構成では、記録膜材料である有機化合物の熱分解点
が３００℃以上では、規定されたレーザー光の光吸収と
記録パワーでは、ピットを形成するだけの物理的・化学
的変化が生じるだけの熱量が確保されないため、規定内
で記録するためには、熱分解点を下げることが必要とな
る。However, in the above-mentioned conventional structure, when the thermal decomposition point of the organic compound, which is the recording film material, is 300 ° C. or higher, pits are formed with the specified light absorption of the laser beam and the recording power. Since the amount of heat required for the physical and chemical changes to occur is not secured, it is necessary to lower the thermal decomposition point in order to record within the regulations.
【０００９】熱分解点は、その有機化合物の分子骨格に
大きく依存しているため、置換基の導入や、分子内への
金属導入の有無などで、ある程度の低減は可能だが、こ
れを任意に行うのは、困難であった。そこで、例えば上
記ＣＤ準拠のプレーヤーでは、そのレーザー光の記録パ
ワー範囲内で分解するためには、３００℃未満の熱分解
点を有する有機化合物を選択しなければならなかった。
また、さらに記録の高速化、高密度化を行うときは、有
機化合物の熱分解点をその都度、改良しなければならな
いという問題点を有していた。Since the thermal decomposition point largely depends on the molecular skeleton of the organic compound, it can be reduced to some extent by introducing a substituent or introducing a metal into the molecule. It was difficult to do. Therefore, for example, in the above-mentioned CD-compliant player, in order to decompose within the recording power range of the laser light, it is necessary to select an organic compound having a thermal decomposition point of less than 300 ° C.
Further, there is a problem that the thermal decomposition point of the organic compound must be improved each time when the recording speed is increased and the recording density is increased.
【００１０】本発明は上記従来の問題点を解決するもの
で、記録膜を構成する色素等の有機化合物の熱分解点
を、任意に下げることにより、使用するレーザー光の記
録パワーや、書き込み速度、記録密度に適合する光記録
媒体と、その製造方法を提供することを目的とする。The present invention solves the above-mentioned conventional problems. The recording power of a laser beam to be used and the writing speed can be reduced by arbitrarily lowering the thermal decomposition point of an organic compound such as a dye constituting a recording film. It is an object of the present invention to provide an optical recording medium suitable for a recording density and a manufacturing method thereof.
【００１１】[0011]
【課題を解決するための手段】この目的を達成するため
に本発明の光記録媒体は、記録膜として、酸化作用によ
り退色（変色・消色）する色素等の有機化合物に、酸化
剤を１０ｐｐｍ以上含有した構成を有している。このと
き、酸化剤は、過酸化系、塩素系など酸化作用があれば
いずれでもよく、これらの使用は単体でも混合でもよ
い。In order to achieve this object, the optical recording medium of the present invention comprises a recording film, an organic compound such as a dye which is discolored (discolored / discolored) by an oxidizing action, and an oxidizer of 10 ppm. It has the composition contained above. At this time, the oxidizing agent may be any one such as a peroxide type and a chlorine type as long as it has an oxidizing action, and these may be used alone or as a mixture.
【００１２】一方、上記の記録膜の製造方法は、基板上
に色素等の有機化合物を蒸着法または塗布法などにより
形成したのち、酸化剤を噴霧するか、もしくは酸化剤を
空気中または窒素中で蒸発させた雰囲気内にこれを通過
させ、有機化合物内に酸化剤を微量含有させるものであ
る。このとき、処理槽内に臭素など他のガスを注入混合
させてもよい。On the other hand, in the above-mentioned method for producing a recording film, after an organic compound such as a dye is formed on a substrate by a vapor deposition method or a coating method, an oxidizing agent is sprayed or the oxidizing agent is in air or nitrogen. The organic compound is allowed to pass through the atmosphere evaporated in step 1) so that the organic compound contains a trace amount of the oxidizing agent. At this time, another gas such as bromine may be injected and mixed into the processing tank.
【００１３】[0013]
【作用】この構成によって、基板側から記録層にレーザ
ー光が照射されると、微量に含まれる酸化剤が有機化合
物の分解を促進する触媒として作用し、その有機化合物
が本来持っている熱分解点より低い温度で分解を起こ
し、ピットを形成することができる。With this structure, when the recording layer is irradiated with laser light from the substrate side, the oxidizing agent contained in a small amount acts as a catalyst for promoting the decomposition of the organic compound, and the thermal decomposition originally possessed by the organic compound. Decomposition occurs at a temperature lower than the point and pits can be formed.
【００１４】このとき、記録層に含有する酸化剤の量を
制御することにより、有機化合物の熱分解点を設定する
ことができる。At this time, the thermal decomposition point of the organic compound can be set by controlling the amount of the oxidizing agent contained in the recording layer.
【００１５】その方法として、具体的には、酸化剤の噴
霧量や、雰囲気内の酸化剤濃度や混合ガス濃度、これを
通過するときの速度等を選定することにより可能であ
る。As the method, specifically, it is possible to select the spray amount of the oxidizing agent, the concentration of the oxidizing agent and the concentration of the mixed gas in the atmosphere, the speed at which the gas passes, and the like.
【００１６】[0016]
（実施例１）以下本発明の一実施例について、図面を参
照しながら説明する。(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings.
【００１７】図１において、１は基板、２は記録層で、
反射層３、保護層４の４層構造を有している。このう
ち、２は、色素等の有機化合物を主材料とし、これに微
量の酸化剤を含有している。In FIG. 1, 1 is a substrate, 2 is a recording layer,
It has a four-layer structure of a reflective layer 3 and a protective layer 4. Of these, 2 has an organic compound such as a pigment as a main material and contains a trace amount of an oxidizing agent.
【００１８】まず、本発明に用いられる基板１は、記録
するレーザー光の透過率が８５％以上あり、かつ光学異
方性の小さいものが望ましい。その材料は、例えば、ガ
ラス、アクリル樹脂、ポリカーボネート樹脂、ポリオレ
フィン樹脂、ポリエステル樹脂、ポリスチレン樹脂、ポ
リメタクリル酸メチル樹脂等の熱可塑性樹脂や、エポキ
シ樹脂、アリル樹脂等の熱硬化性樹脂、紫外線硬化樹脂
等が挙げられる。これらのうち熱可塑性樹脂は、射出
（圧縮）成形機により成形が可能なため量産性が高く、
特に耐衝撃性の優れたポリカーボネート樹脂が最も一般
的である。First, it is desirable that the substrate 1 used in the present invention has a transmittance of the laser light for recording of 85% or more and a small optical anisotropy. The material is, for example, thermoplastic resin such as glass, acrylic resin, polycarbonate resin, polyolefin resin, polyester resin, polystyrene resin, polymethylmethacrylate resin, thermosetting resin such as epoxy resin and allyl resin, and ultraviolet curing resin. Etc. Of these, thermoplastic resins have high mass productivity because they can be molded with an injection (compression) molding machine,
Particularly, a polycarbonate resin having excellent impact resistance is the most common.
【００１９】こうして形成する基板は、特に厚みの制限
はなく、板状でもフィルム状でも良い。その形状は、円
形やカード状でもよく、大きさにも特に制限はない。ま
た、基板上に他の層、例えばＳｉＯ2 等の耐溶剤層や形
成されたピットの熱による形状変化を抑制するエンハン
ス層を設けてもよい。さらに基板の記録層側の表面に
は、レーザー光の進行路を導く手段が設けてある。これ
は、例えば所定間隔に形成されたピットからなるアドレ
スピットでもよいが、スパイラル状もしくは同心円状等
の案内溝が望ましい。その溝に沿ってレーザー光が進行
して記録再生することができる。The substrate thus formed is not particularly limited in thickness and may be plate-shaped or film-shaped. The shape may be circular or card-like, and the size is not particularly limited. Further, another layer, for example, a solvent resistant layer such as SiO 2 or an enhance layer for suppressing the shape change of the formed pit due to heat may be provided on the substrate. Further, the surface of the substrate on the recording layer side is provided with means for guiding the traveling path of laser light. This may be, for example, an address pit composed of pits formed at predetermined intervals, but a spiral or concentric guide groove is preferable. A laser beam travels along the groove to allow recording and reproduction.
【００２０】ここでは、ポリカーボネート樹脂を射出成
形して得たもので、厚さ１．２ｍｍ、外径１２０ｍｍ、
内径１５ｍｍの透明基板の記録層側に、幅０．８μｍ、
深さ０．１μｍ、ピッチ１．６μｍのスパイラル状の案
内溝が設けてある。Here, a polycarbonate resin is obtained by injection molding, and has a thickness of 1.2 mm, an outer diameter of 120 mm,
On the recording layer side of the transparent substrate having an inner diameter of 15 mm, a width of 0.8 μm,
A spiral guide groove having a depth of 0.1 μm and a pitch of 1.6 μm is provided.
【００２１】次に、上記基板の案内溝側に形成する記録
層２は、その主材料として色素等の有機化合物を用いる
ものである。この有機化合物は、使用するレーザー光の
波長である程度の光吸収があるものであれば、特に限定
はないが、アゾ系色素、キノン系色素、シアニン系色
素、フタロシアニン系色素などが一般的である。これ
を、蒸着法または塗布法などにより形成するものであ
る。Next, the recording layer 2 formed on the guide groove side of the substrate uses an organic compound such as a dye as its main material. The organic compound is not particularly limited as long as it has some light absorption at the wavelength of the laser light used, but is generally an azo dye, a quinone dye, a cyanine dye, a phthalocyanine dye, or the like. . This is formed by a vapor deposition method or a coating method.
【００２２】ここでは、４−（４’−ジエチルアミノフ
ェニルイミノ）−６−アセチルアミノ−２’−メチル−
１，４−ベンゾキノンを真空蒸着し、溝部で膜厚１５０
ｎｍになるよう形成した。Here, 4- (4'-diethylaminophenylimino) -6-acetylamino-2'-methyl-
Vacuum deposition of 1,4-benzoquinone and film thickness of 150 at groove
It was formed to have a thickness of nm.
【００２３】これに酸化剤を含有させるのだが、ここで
用いる酸化剤は、次亜塩素酸塩・亜塩素酸塩などの塩素
系、過酸化水素・過酢酸などの過酸化系や、その他酸化
作用があればいずれでもよい。これらは単体でも混合で
使用してもよい。Although an oxidizing agent is added to this, the oxidizing agent used here is a chlorine type such as hypochlorite or chlorite, a peroxide type such as hydrogen peroxide or peracetic acid, or other oxidizing agents. Any one will do as long as it has an action. These may be used alone or as a mixture.
【００２４】その製造方法は、基板上に色素等の有機化
合物を蒸着法または塗布法などにより形成したのち、酸
化剤を噴霧するか、もしくは酸化剤を空気中または窒素
中で蒸発させた雰囲気内にこれを通過させ、有機化合物
内に酸化剤を微量含有させるものである。ここでは、酸
化剤として、過酸化水素を蒸発させ１０００ｐｐｍ充満
させた雰囲気内に通過させ、上記有機化合物内に過酸化
水素を含有させた。The manufacturing method is as follows: An organic compound such as a dye is formed on a substrate by a vapor deposition method or a coating method, and then an oxidizing agent is sprayed, or in an atmosphere in which the oxidizing agent is evaporated in air or nitrogen. It is allowed to pass through, and a trace amount of the oxidant is contained in the organic compound. Here, hydrogen peroxide was evaporated and passed through an atmosphere filled with 1000 ppm, and hydrogen peroxide was contained in the organic compound.
【００２５】本発明の反射層３は、材料として、金、
銀、銅、白金、アルミニウム等の金属およびこれらを主
成分とした合金、ＭｇＯ、ＺｎＯ、ＳｎＯ等の金属酸化
物、ＳｉＮ4 、ＡｌＮ、ＴｉＯ等の窒化物などが挙げら
れる。中でも絶対反射率が高く、保存安定性に優れてい
る金は最適であるが、使用するレーザー光で記録再生す
るのに必要な反射率が確保できれば何れでもよい。この
反射層は、真空蒸着法、スパッタ法などにより形成す
る。 ここでは、金をスパッタ法により膜厚８０ｎｍ程
度を成膜した。The reflective layer 3 of the present invention is made of gold,
Examples thereof include metals such as silver, copper, platinum and aluminum, alloys containing these as the main components, metal oxides such as MgO, ZnO and SnO, and nitrides such as SiN 4 , AlN and TiO. Among them, gold is most suitable because it has a high absolute reflectance and excellent storage stability, but any one can be used as long as the reflectance necessary for recording and reproducing with the laser light used can be secured. This reflective layer is formed by a vacuum vapor deposition method, a sputtering method, or the like. Here, gold was formed into a film having a thickness of about 80 nm by a sputtering method.
【００２６】本発明の保護膜４は、上記基板と同様に耐
衝撃性の優れ、低硬化収縮性を兼ね備えた樹脂により形
成する。これは例えば、紫外線硬化樹脂をスピンコート
法により塗布したのち、これに紫外線を照射して硬化さ
せることにより形成する。この他、エポキシ樹脂、アク
リル樹脂、シリコーン系ハードコート樹脂等を使用して
もよい。ここでは、紫外線硬化樹脂をスピンコート法に
より塗布し、紫外線照射により硬化させた。このときの
膜厚は１０μｍであった。The protective film 4 of the present invention is formed of a resin having excellent impact resistance and low curing shrinkage as in the above substrate. This is formed, for example, by applying an ultraviolet curable resin by a spin coating method and then irradiating it with ultraviolet rays to cure it. In addition, epoxy resin, acrylic resin, silicone-based hard coat resin, etc. may be used. Here, an ultraviolet curable resin was applied by a spin coating method and cured by irradiation with ultraviolet rays. The film thickness at this time was 10 μm.
【００２７】上記のように構成された光記録媒体に、線
速１．２ｍ／ｓｅｃとして、波長７８０ｎｍのレーザー
光を最適記録パワーでＥＦＭ信号（Ｅｉｇｈｔ ｔｏ
Ｆｏｕｒｔｅｅｎ Ｍｏｄｕｌａｔｉｏｎ）を記録し
た。On the optical recording medium having the above-described structure, a laser beam having a wavelength of 780 nm is set at an optimum recording power at a linear velocity of 1.2 m / sec and an EFM signal (Eight to).
Fourteen Modulation) was recorded.
【００２８】本実施例による記録膜の過酸化水素の含有
量と熱分解点、最適記録パワーとを従来と比較してThe content of hydrogen peroxide, the thermal decomposition point, and the optimum recording power of the recording film according to this embodiment are compared with those of the conventional one.
【００２９】[0029]
【表１】 [Table 1]
【００３０】に示している。ここで、含有量は記録膜材
料をクロマトグラフィ−分析にかけて定量した。また、
熱分解点は熱重量分析で測定した。It is shown in FIG. Here, the content was quantified by subjecting the recording film material to chromatography-analysis. Also,
The thermal decomposition point was measured by thermogravimetric analysis.
【００３１】この（表１）から、比較例１，２，４との
比較でも明らかなように、本実施例による光記録媒体
は、酸化剤量が１０ｐｐｍに達すると、熱分解点が顕著
に低減し、低い記録パワーでも記録できる点で優れた効
果が得られる。From this (Table 1), as is clear from comparison with Comparative Examples 1, 2 and 4, the optical recording medium according to the present example has a remarkable thermal decomposition point when the amount of the oxidizing agent reaches 10 ppm. An excellent effect is obtained in that the recording can be performed with a reduced recording power even with a reduced recording power.
【００３２】ここで、比較例４は従来、熱分解点を下げ
るため専用に製造していた１、１、３−トリメチル−２
−［５−（１，３，３，−トリメチル−２−ベンゾイン
ドリウムパークロライトを主な構成材料とした場合であ
り、本発明は汎用材料に酸化剤を含ませることにより従
来の専用材料と同等のレベルにまで熱分解点を下げ、記
録パワーを低くできるものである。Here, in Comparative Example 4, 1,1,3-trimethyl-2, which was conventionally produced exclusively for lowering the thermal decomposition point, was used.
-[5- (1,3,3, -trimethyl-2-benzoindolium perchlorite is used as a main constituent material, and the present invention is a general-purpose material containing an oxidizing agent. The recording power can be lowered by lowering the thermal decomposition point to a level equivalent to.
【００３３】以上のように本実施例によれば、記録膜の
主材料である有機化合物の熱分解点が３００℃以上で
も、これに過酸化水素を１０ｐｐｍ含有することによ
り、これが酸化分解反応の触媒となり、熱分解点を低減
し、レーザー光の記録パワーを小さくするすることがで
きる。As described above, according to the present embodiment, even if the thermal decomposition point of the organic compound which is the main material of the recording film is 300 ° C. or higher, by containing 10 ppm of hydrogen peroxide, the oxidative decomposition reaction is caused. It serves as a catalyst, can reduce the thermal decomposition point, and can reduce the recording power of laser light.
【００３４】（実施例２）以下本発明の第２の実施例に
ついて説明する。(Second Embodiment) A second embodiment of the present invention will be described below.
【００３５】第１の実施例と同様に成形したポリカーボ
ネート樹脂基板に、過酸化水素の濃度を５０００ｐｐｍ
にして第１の実施例と同様の手順で記録膜を形成した。
さらに同様にして反射膜と保護膜を形成した。A polycarbonate resin substrate molded in the same manner as in the first embodiment was applied with a hydrogen peroxide concentration of 5000 ppm.
Then, a recording film was formed by the same procedure as in the first embodiment.
Further, a reflective film and a protective film were formed in the same manner.
【００３６】上記のように構成された光記録媒体につい
て、記録膜中の酸化剤の含有量と、熱分解点、最適記録
パワーを測定し、（表１）に示している。With respect to the optical recording medium configured as described above, the content of the oxidant in the recording film, the thermal decomposition point, and the optimum recording power were measured and are shown in (Table 1).
【００３７】以上のように本実施例によれば、記録膜の
主材料である有機化合物に過酸化水素を１００ｐｐｍ含
有することにより、これが酸化分解反応の触媒となり、
熱分解点を低減し、レーザー光の記録パワーをより小さ
くすることができる。As described above, according to this embodiment, since 100 ppm of hydrogen peroxide is contained in the organic compound which is the main material of the recording film, this serves as a catalyst for the oxidative decomposition reaction,
The thermal decomposition point can be reduced, and the recording power of laser light can be made smaller.
【００３８】（実施例３）以下本発明の第３の実施例に
ついて説明する。(Embodiment 3) A third embodiment of the present invention will be described below.
【００３９】第１の実施例と同様に成形したポリカーボ
ネート樹脂基板の案内溝面に、ＳｉＯ2 をスピンコート
法により膜厚１５ｎｍになるよう耐溶剤層を形成した。
その上に実施例１と同一のキノン系有機化合物をメチル
エチルケトンに３ｗｔ％の濃度で溶解した塗工液を同じ
くスピンコート法により塗布し、溝部で膜厚１５０ｎｍ
になるよう形成した。次に、第２の実施例と同様の手順
で過酸化水素を含有させて記録膜を形成した。さらに同
様にして反射膜と保護膜を形成した。[0039] guide groove surfaces of the first preferred polycarbonate resin substrate molded in the same manner as Example, and the SiO 2 to form a solvent layer so that the thickness of 15nm by spin coating.
A coating solution prepared by dissolving the same quinone-based organic compound as in Example 1 in methyl ethyl ketone at a concentration of 3 wt% was applied thereon by the same spin coating method, and the film thickness at the groove was 150 nm.
Was formed. Next, hydrogen peroxide was added to form a recording film by the same procedure as in the second embodiment. Further, a reflective film and a protective film were formed in the same manner.
【００４０】上記のように構成された光記録媒体につい
て、記録膜中の酸化剤の含有量と、熱分解点、最適記録
パワーを測定し、（表１）に示している。With respect to the optical recording medium configured as described above, the content of the oxidant in the recording film, the thermal decomposition point, and the optimum recording power were measured and shown in (Table 1).
【００４１】以上のように本実施例によれば、記録膜の
主材料である有機化合物に過酸化水素を１００ｐｐｍ含
有することにより、これが酸化分解反応の触媒となり、
熱分解点を低減し、レーザー光の記録パワーをより小さ
くすることができ、記録膜の主材料である有機化合物を
第２の実施例と異なる形成方法で実施しても同様の結果
を得ることができる。As described above, according to the present embodiment, by containing 100 ppm of hydrogen peroxide in the organic compound which is the main material of the recording film, this serves as a catalyst for the oxidative decomposition reaction,
The thermal decomposition point can be reduced, the recording power of the laser beam can be made smaller, and similar results can be obtained even when an organic compound which is the main material of the recording film is formed by a forming method different from that of the second embodiment. You can
【００４２】（実施例４）以下本発明の第４の実施例に
ついて説明する。(Embodiment 4) A fourth embodiment of the present invention will be described below.
【００４３】第１の実施例と同様に成形したポリカーボ
ネート樹脂基板に、記録膜を構成する有機化合物とし
て、フタロシアニン系色素の中でも特に一般的な銅フタ
ロシアニンを用い、過酸化水素の濃度を５０００ｐｐｍ
にして第１の実施例と同様の手順で記録膜を形成した。
さらに同様にして反射膜と保護膜を形成した。Copper phthalocyanine, which is particularly common among phthalocyanine dyes, was used as the organic compound for forming the recording film on a polycarbonate resin substrate molded in the same manner as in Example 1, and the concentration of hydrogen peroxide was 5000 ppm.
Then, a recording film was formed by the same procedure as in the first embodiment.
Further, a reflective film and a protective film were formed in the same manner.
【００４４】上記のように構成された光記録媒体につい
て、記録膜中の酸化剤の含有量と、熱分解点、最適記録
パワーを測定し、（表１）に示している。With respect to the optical recording medium constructed as described above, the content of the oxidant in the recording film, the thermal decomposition point, and the optimum recording power were measured and are shown in (Table 1).
【００４５】以上のように本実施例によれば、記録膜の
主材料である有機化合物に過酸化水素を１００ｐｐｍ含
有することにより、これが酸化分解反応の触媒となり、
熱分解点を低減し、レーザー光の記録パワーをより小さ
くすることができる。As described above, according to this embodiment, since 100 ppm of hydrogen peroxide is contained in the organic compound which is the main material of the recording film, this serves as a catalyst for the oxidative decomposition reaction,
The thermal decomposition point can be reduced, and the recording power of laser light can be made smaller.
【００４６】なお、上記実施例において、酸化剤を含有
させる際、酸化剤を蒸発させた雰囲気内を通過させた
が、酸化剤を霧状で有機化合物と接触させればよいの
で、噴霧により散布してもよい。また、酸化剤の蒸発速
度の安定化を図る目的や、臭素を混合するなどして酸化
剤の酸化作用を更に促進する目的で、他のガスを混入し
てもよい。It should be noted that, in the above embodiment, when the oxidizing agent was contained, it was passed through the atmosphere in which the oxidizing agent was evaporated. However, since the oxidizing agent may be brought into contact with the organic compound in a mist state, it may be sprayed. You may. Further, other gas may be mixed for the purpose of stabilizing the evaporation rate of the oxidizing agent and for further promoting the oxidizing action of the oxidizing agent by mixing bromine.
【００４７】[0047]
【発明の効果】以上のように本発明は、有機化合物で構
成した記録膜に、酸化剤を噴霧または蒸発させた雰囲気
内を通過させる方法により、有機化合物に酸化剤を１０
ｐｐｍ以上含有させることにより、酸化反応を促進して
熱分解点の低下させ、レーザー光の記録パワーを低減
し、省電力で記録再生することができるものである。ま
たこの製造方法により、さらなる記録の高速化、高密度
化に適した熱分解点を任意に設定できる光記録媒体を提
供できるものである。INDUSTRIAL APPLICABILITY As described above, according to the present invention, an oxidizer is added to an organic compound by a method of passing the oxidizer into an atmosphere in which the oxidizer is sprayed or evaporated on the recording film made of the organic compound.
By containing at least ppm, the oxidation reaction can be promoted to lower the thermal decomposition point, the recording power of laser light can be reduced, and recording / reproduction can be performed with low power consumption. Further, according to this manufacturing method, it is possible to provide an optical recording medium in which a thermal decomposition point suitable for higher recording speed and higher recording density can be arbitrarily set.
【図１】本発明の実施例における光記録媒体の構成断面
図FIG. 1 is a structural cross-sectional view of an optical recording medium in an embodiment of the present invention.
１ 基板 ２ 記録層 ３ 反射層 ４ 保護層 DESCRIPTION OF SYMBOLS 1 Substrate 2 Recording layer 3 Reflective layer 4 Protective layer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 高瀬 良幸 大阪府門真市大字門真1006番地 松下電器 産業株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshiyuki Takase 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.
Claims (4)
録層を有する光記録媒体において、記録層として、酸化
作用により退色（変色・消色）を起こす色素等の有機化
合物に１０ｐｐｍ以上の酸化剤を備えた光記録媒体。1. An optical recording medium having a recording layer which transmits and absorbs a laser beam on a substrate, wherein as a recording layer, an organic compound such as a dye that causes discoloration (discoloration / discoloration) by an oxidizing action is oxidized to 10 ppm or more. Optical recording medium provided with an agent.
解点を持つものである請求項１記載の光記録媒体。2. The optical recording medium according to claim 1, wherein the organic compound such as a dye has a decomposition point of 300 ° C. or higher.
合したものである請求項１記載の光記録媒体。3. The optical recording medium according to claim 1, wherein the oxidizing agent is a single substance or a mixture of peroxides.
して、記録層を構成する色素等の有機化合物表面に酸化
剤を噴霧するか、もしくは酸化剤を空気中または窒素中
で蒸発させた雰囲気内に色素等の有機化合物を備えた基
板を通過させて、有機化合物に酸化剤を含有させる光記
録媒体の製造方法。4. A method for obtaining the optical recording medium according to claim 1, wherein an oxidizing agent is sprayed on the surface of an organic compound such as a dye constituting the recording layer, or the oxidizing agent is evaporated in air or nitrogen. A method of manufacturing an optical recording medium, which comprises passing an organic compound such as a dye in an atmosphere through a substrate so that the organic compound contains an oxidizing agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7163441A JPH0911619A (en) | 1995-06-29 | 1995-06-29 | Optical recording medium and production thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7163441A JPH0911619A (en) | 1995-06-29 | 1995-06-29 | Optical recording medium and production thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0911619A true JPH0911619A (en) | 1997-01-14 |
Family
ID=15773959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7163441A Pending JPH0911619A (en) | 1995-06-29 | 1995-06-29 | Optical recording medium and production thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0911619A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6338933B1 (en) * | 1998-06-25 | 2002-01-15 | Spectradisc Corporation | Methods and apparatus for rendering an optically encoded medium unreadable |
| US6531262B1 (en) | 1998-06-25 | 2003-03-11 | Spectradisc Corporation | Methods and apparatus for rendering an optically encoded medium unreadable and tamper-resistant |
| US6747930B1 (en) | 1996-12-24 | 2004-06-08 | Hide & Seek Technologies, Inc. | Data protection on an optical disk |
| US7094517B1 (en) * | 1998-05-13 | 2006-08-22 | D Data Inc. | Recording layer with organic dye-in-polymer (DIP) medium for write-once-read-many (WORM) optical discs with fluorescent reading |
-
1995
- 1995-06-29 JP JP7163441A patent/JPH0911619A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6747930B1 (en) | 1996-12-24 | 2004-06-08 | Hide & Seek Technologies, Inc. | Data protection on an optical disk |
| US7094517B1 (en) * | 1998-05-13 | 2006-08-22 | D Data Inc. | Recording layer with organic dye-in-polymer (DIP) medium for write-once-read-many (WORM) optical discs with fluorescent reading |
| US6338933B1 (en) * | 1998-06-25 | 2002-01-15 | Spectradisc Corporation | Methods and apparatus for rendering an optically encoded medium unreadable |
| US6531262B1 (en) | 1998-06-25 | 2003-03-11 | Spectradisc Corporation | Methods and apparatus for rendering an optically encoded medium unreadable and tamper-resistant |
| US6709802B2 (en) | 1998-06-25 | 2004-03-23 | Flexplay Technologies, Inc. | Methods and apparatus for rendering an optically encoded medium unreadable |
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