JPH0648045A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPH0648045A JPH0648045A JP4223460A JP22346092A JPH0648045A JP H0648045 A JPH0648045 A JP H0648045A JP 4223460 A JP4223460 A JP 4223460A JP 22346092 A JP22346092 A JP 22346092A JP H0648045 A JPH0648045 A JP H0648045A
- Authority
- JP
- Japan
- Prior art keywords
- recording
- substituent
- group
- film
- recording medium
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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- 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−ザ−光線によっ
て、情報を書き込んだり、読み取ったりすることが可能
な光学記録媒体に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical recording medium in which information can be written and read by a laser beam.
【０００２】[0002]
【従来の技術】従来、レ−ザ−光線を用いて情報を記録
する媒体には種々のものがあるが、その一つにシアニン
色素、フタロシアニン色素等の有機色素を記録膜とし、
レ−ザ−光を基板上の記録層に照射することによって、
照射部分を局部的に加熱し、融解、蒸発、昇華または分
解等の物理的あるいは化学的変化を起こさせる、即ちピ
ットを形成して情報を記録するものがある。2. Description of the Related Art Conventionally, there are various media for recording information by using a laser beam. One of them is an organic dye such as a cyanine dye and a phthalocyanine dye as a recording film.
By irradiating the recording layer on the substrate with laser light,
There is one in which the irradiated portion is locally heated to cause a physical or chemical change such as melting, evaporation, sublimation or decomposition, that is, a pit is formed to record information.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、前述の
ようにレ−ザ−光を基板上の記録層に照射することによ
って、照射部分を局部的に加熱し、融解、蒸発、昇華ま
たは分解等の物理的あるいは化学的変化を起こさせるに
は、大きな光エネルギー、即ち高出力のレーザー照射が
必要であり、そのため高速記録、たとえば線速度１０ｍ
／ｓｅｃ以上での記録では感度が著しく低下してしま
う。また、物理的あるいは化学的変化による形状の変化
により記録ピットが形成されるため、ピットの形状の不
均一性は避けられず、そのためピットの非対称性等に由
来する時間分解能が十分でなく、さらに微小ピットの形
成も満足なものではなく、高密度記録に十分対応できる
とは言い難い。また、ピットの形成を伴わない結晶質−
非晶質相変化を利用した光記録媒体の場合には、記録膜
が結晶質になる必要があり、そのため結晶粒界等が発生
しやすくなりノイズ、エラーの原因になり易い等の問題
点がある。However, by irradiating the recording layer on the substrate with laser light as described above, the irradiated portion is locally heated to cause melting, evaporation, sublimation or decomposition. In order to cause a physical or chemical change, a large amount of light energy, that is, high-power laser irradiation is required, and therefore high-speed recording, for example, a linear velocity of 10 m.
If the recording speed is more than 1 sec, the sensitivity is remarkably reduced. In addition, since the recording pits are formed due to the change in shape due to physical or chemical changes, non-uniformity of the shape of the pits is unavoidable, and therefore the time resolution due to the asymmetry of the pits is not sufficient. The formation of minute pits is not satisfactory, and it cannot be said that it can sufficiently cope with high density recording. In addition, a crystalline material with no pit formation
In the case of an optical recording medium that utilizes an amorphous phase change, the recording film needs to be crystalline, so that crystal grain boundaries and the like are likely to occur, which causes problems such as noise and errors. is there.
【０００４】[0004]
【課題を解決する手段】本発明者らは、鋭意検討を行な
った結果、高速記録および微小ピット形成に対応する高
密度記録さらに時間分解能も十分な性能が得られる光学
記録媒体を開発し、本発明を完成するに至った。As a result of intensive studies, the present inventors have developed an optical recording medium capable of achieving high-speed recording and high-density recording corresponding to the formation of minute pits, and also having sufficient time resolution. The invention was completed.
【０００５】即ち、透明基板上／非晶質有機色素記録膜
／反射膜の積層体で構成され、非晶質有機色素記録膜が
透明基板より入射する記録レーザー光を吸収することに
より発生する熱エネルギーによって、分解、融解、蒸発
あるいは昇華の状態変化によるピットの形成、または相
転移を伴わない再生レーザー光波長域の光透過率が変化
することを利用した光記録媒体において、非晶質有機色
素記録膜が、下記一般式［１］で示される化合物である
ことを特徴とする光学記録媒体である。 一般式［１］That is, heat generated by absorbing a recording laser beam incident from the transparent substrate, which is composed of a laminate of transparent substrate / amorphous organic dye recording film / reflection film. An amorphous organic dye is used in an optical recording medium utilizing the fact that pits are formed due to a change in the state of decomposition, melting, evaporation or sublimation due to energy, or the light transmittance in the reproduction laser light wavelength region is not accompanied by a phase transition. An optical recording medium, wherein the recording film is a compound represented by the following general formula [1]. General formula [1]
【０００６】[0006]
【化２】 [Chemical 2]
【０００７】 [0007]
【０００８】Ｙ1 〜Ｙ4 は、それぞれ独立にハロゲン原
子、置換基を有しても良いアルキル基、置換基を有して
も良いシクロアルキル基、置換基を有しても良いアリー
ル基置換基を有しても良いアシル基、置換基を有しても
良い複素環残基、ニトロ基、シアノ基、スルホン酸基、
カルボン酸基、−ＯＲ1 、−ＳＲ2 、−ＣＯＯＲ1 、 −Ｎ＝ＣＨＲ1 Y 1 to Y 4 are each independently a halogen atom, an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, or an aryl group which may have a substituent. An acyl group which may have a group, a heterocyclic residue which may have a substituent, a nitro group, a cyano group, a sulfonic acid group,
Carboxylic acid group, -OR 1 , -SR 2 , -COOR 1 , -N = CHR 1
【０００９】ここで、Ｒ1 およびＲ2 は、互いに同一で
あっても異なっていても良く、水素原子、置換基を有し
ていても良いアルキル基、置換基を有していても良いア
リール基、置換基を有していても良いシクロアルキル
基、置換基を有していても良いアシル基、またはポリエ
ーテル基を表し、また、Ｒ1 とＲ2 で４〜７員環を形成
していても良く、その際、さらに窒素原子、酸素原子、
イオウ原子等のヘテロ原子を含む複素環であっても良
い。Ｍは、シリコン、ゲルマニウムを表す。ｌ1 〜
ｌ4 、ｍ1 〜ｍ4 は、それぞれＸ1 〜Ｘ4 、Ｙ1 〜Ｙ4
の置換基数を表す。ｌ1 〜ｌ4 は、それぞれ独立に０〜
４の整数を表すが、すべて同時に０となることはない。
ｍ１〜ｍ４は、それぞれ独立に０〜４の整数を表す。］Here, R 1 and R 2 may be the same or different from each other, and are a hydrogen atom, an alkyl group which may have a substituent or an aryl which may have a substituent. Represents a group, a cycloalkyl group which may have a substituent, an acyl group which may have a substituent, or a polyether group, and R 1 and R 2 form a 4- to 7-membered ring. At that time, further nitrogen atom, oxygen atom,
It may be a heterocycle containing a hetero atom such as a sulfur atom. M represents silicon or germanium. l 1 ~
l 4, m 1 ~m 4 is, X 1 to X 4 each, Y 1 to Y 4
Represents the number of substituents. l 1 to l 4 are each independently 0 to
It represents an integer of 4, but not all become 0 at the same time.
m1 to m4 each independently represent an integer of 0 to 4. ]
【００１０】なお、本発明における相転移とは、化合物
が結晶状態から非晶質状態に変化すること、または化合
物が非晶質状態から結晶状態に変化することである。The phase transition in the present invention means that the compound changes from a crystalline state to an amorphous state, or that the compound changes from an amorphous state to a crystalline state.
【００１１】本発明の光記録媒体の例としては、透明基
板／記録膜／反射層／保護層の構成を有し、高速で回転
し非常に小さい微小記録が必要となるＬＤに対応する追
記型光ディスクが最も代表的なものであるが、これに限
定されるものではなく一般に記録再生をレーザー光によ
り行う光記録媒体には全て適用できる。An example of the optical recording medium of the present invention is a write-once type corresponding to an LD having a structure of transparent substrate / recording film / reflection layer / protective layer, which rotates at high speed and requires very small minute recording. The optical disc is the most typical one, but the present invention is not limited to this, and is generally applicable to all optical recording media in which recording and reproduction are performed by laser light.
【００１２】本発明において用いられる透明基板として
は、信号の書き込みや読み出しを行なうために光の透過
率が好ましくは８５％以上であり、かつ光学異方性の小
さいものが望ましい。例えば、ガラスまたはアクリル樹
脂、ポリカ−ボネ−ト樹脂、ポリエステル樹脂、ポリア
ミド樹脂、塩化ビニル系樹脂、ポリビニルエステル系樹
脂、ポリスチレン系樹脂、ポリオレフィン系樹脂（例え
ばポリ−４−メチルペンテン等）、ポリエ−テルスルホ
ン樹脂等の熱可塑性樹脂やエポキシ樹脂、アリル樹脂等
の熱硬化性樹脂を用いた基板が挙げられる。これらの中
で、成型のしやすさ、案内溝やアドレス信号等の付与の
しやすさなどから前記した熱可塑性樹脂が好ましい。The transparent substrate used in the present invention preferably has a light transmittance of 85% or more for writing and reading signals and has a small optical anisotropy. For example, glass or acrylic resin, polycarbonate resin, polyester resin, polyamide resin, vinyl chloride resin, polyvinyl ester resin, polystyrene resin, polyolefin resin (for example, poly-4-methylpentene, etc.), polyester Substrates using a thermoplastic resin such as tersulphone resin or a thermosetting resin such as an epoxy resin or an allyl resin may be mentioned. Among these, the above-mentioned thermoplastic resins are preferable because of their ease of molding and the ease of providing guide grooves and address signals.
【００１３】本発明においては、これらの透明基板の厚
さは特に制限がなく、板状でもフィルム状でもよい。ま
たその形状は円形やカ−ド状でもよく、その大きさには
特に制限はない。つまり一般の光ディスクという円盤状
のものに限定されるものではなく、光カ−ドやテ−プ状
あるいはシ−ト状の記録媒体でもよい。また本発明の透
明基板には、記録および読み出しの際の位置制御のため
の案内溝やアドレス信号や各種マ−ク等のプレフォ−マ
ット用の凹凸を通常有しているが、これらの凹凸は前記
したような熱可塑性樹脂を成形（射出成形、圧縮成形）
する際にスタンパ−などを用いて付与する方法が好まし
いが、フォトポリマ−樹脂を用いるいわゆる２Ｐ法によ
っても行なうことができる。In the present invention, the thickness of these transparent substrates is not particularly limited and may be plate-like or film-like. The shape may be circular or card-like, and the size is not particularly limited. In other words, it is not limited to a disc-shaped recording medium such as a general optical disc, and may be an optical card, a tape-shaped recording medium, or a sheet-shaped recording medium. The transparent substrate of the present invention usually has guide grooves for position control at the time of recording and reading and unevenness for pre-formatting such as address signals and various marks. Molding thermoplastic resin as described above (injection molding, compression molding)
It is preferable to use a stamper or the like for the application, but a so-called 2P method using a photopolymer resin can also be used.
【００１４】本発明の案内溝の形状については特に制限
はなく、短形、台形、Ｕ字形であってもよい。また案内
溝の寸法については、記録層に用いられる材料の種類お
よび組合せ等により最適値はそれぞれ異なるが、平均溝
幅（溝深さの１／２の位置の幅）が０．３〜０．６ミク
ロン、また溝深さが５００〜２０００オングストロ−ム
の範囲が好ましい。The shape of the guide groove of the present invention is not particularly limited, and may be a short shape, a trapezoidal shape, or a U-shape. Regarding the dimensions of the guide groove, the optimum values differ depending on the type and combination of the materials used for the recording layer, but the average groove width (width at half the groove depth) is 0.3 to 0. It is preferably 6 microns and the groove depth is in the range of 500 to 2000 angstroms.
【００１５】本発明の光記録媒体において、記録膜に用
いられる非晶質有機色素としてはフタロシアニン系化合
物、特にジヒドロキシシリコンフタロシアニン系化合物
が好ましく、さらに有機置換基を有し、分子間のスタッ
キング性が低下している化合物が好ましい。また、記録
膜の成膜が非晶質有機色素を溶剤に溶解し、いわゆるコ
ーティングにより行えるように汎用の有機溶剤に可溶に
するための可溶性置換基を有していればさらに好まし
い。上記の特性を有する化合物が本発明の記録膜となり
得るが、このような特性に対して一般式［１］で示され
る化合物が非常に効果的であり、本発明の光記録媒体を
実現させるためには最適な材料である。In the optical recording medium of the present invention, the amorphous organic dye used for the recording film is preferably a phthalocyanine compound, particularly a dihydroxysilicon phthalocyanine compound, which further has an organic substituent and has an intermolecular stacking property. Reduced compounds are preferred. Further, it is more preferable that the recording film has a soluble substituent for dissolving the amorphous organic dye in a solvent and making it soluble in a general-purpose organic solvent so that it can be formed by so-called coating. The compound having the above-mentioned properties can be used as the recording film of the present invention, but the compound represented by the general formula [1] is very effective for such properties, and in order to realize the optical recording medium of the present invention. Is the best material for
【００１６】本発明の光記録媒体において、記録層を成
膜するには、ドライプロセス、例えばば、真空蒸着法、
スパッタリング法によっても可能であるが、ウエットプ
ロセス、例えば、スピンコ−ト法、ディップ法、スプレ
−法、ロ−ルコ−ト法あるいはＬＢ（ラングミュア−ブ
ロジェット）法によっても可能である。本発明の光学記
録媒体の記録層に含有される記録材料が、汎用の有機溶
媒、例えば、アルコ−ル系、ケトン系、セロソルブ系、
ハロゲン化炭化水素系、フロン系溶媒等に溶解する場合
は、生産性および記録膜の均一性からスピンコ−ト法に
より成膜する方法が好ましい。In the optical recording medium of the present invention, a recording layer is formed by a dry process, for example, a vacuum vapor deposition method,
Although it is possible to use the sputtering method, it is also possible to use a wet process such as a spin coat method, a dip method, a spray method, a roll coat method or an LB (Langmuir-Blodgett) method. The recording material contained in the recording layer of the optical recording medium of the present invention is a general-purpose organic solvent, for example, alcohol-based, ketone-based, cellosolve-based,
When it is dissolved in a halogenated hydrocarbon-based or fluorocarbon-based solvent, a method of forming a film by a spin coat method is preferable from the viewpoint of productivity and uniformity of a recording film.
【００１７】このように、いわゆる塗布法で成膜する場
合には、必要に応じて高分子バインダ−を加えてもよ
い。高分子バインダ−としてはアクリル樹脂、ポリカ−
ボネ−ト樹脂、ポリエステル樹脂、ポリアミド樹脂、塩
化ビニル系樹脂、酢酸ビニル系樹脂、ニトロセルロ−
ス、フェノ−ル樹脂などが挙げられるが、これらに限定
されるものではない。高分子バインダ−の混合比として
は特に制限はないが、非晶質有機色素の集合状態の変化
を阻害しない程度に添加する必要があり非晶質有機色素
に対して１０重量％以下が好ましい。As described above, when the film is formed by the so-called coating method, a polymer binder may be added if necessary. Acrylic resin and polycarbonate as the polymer binder
Bone resin, polyester resin, polyamide resin, vinyl chloride resin, vinyl acetate resin, nitrocellulose
However, the present invention is not limited to these. The mixing ratio of the polymer binder is not particularly limited, but it is necessary to add it in such an amount that the change in the aggregated state of the amorphous organic dye is not hindered, and 10% by weight or less based on the amorphous organic dye is preferable.
【００１８】本発明の記録膜には、記録膜の光安定性、
耐環境性、繰り返し再生の安定性をさらに向上させる目
的で、紫外線吸収剤、紫外線安定剤、酸素クエンチャ−
等の添加剤を加えてもよい。The recording film of the present invention has a light stability of the recording film,
UV absorbers, UV stabilizers, oxygen quenchers for the purpose of further improving environmental resistance and stability of repeated regeneration.
You may add additives, such as.
【００１９】記録膜の最適膜厚は、記録材料の種類およ
び組合せにより異なるため特に制限はなく、５００〜３
０００オングストロ−ムが好ましく、さらに１０００〜
２５００オングストロ−ムが最適膜厚範囲である。The optimum film thickness of the recording film is not particularly limited because it varies depending on the kind and combination of the recording materials, and is 500 to 3
000 angstrom is preferable, and 1000 to
2500 angstrom is the optimum film thickness range.
【００２０】本発明の光記録媒体が反射層を有する場合
には、反射層の材料としては、金、銀、銅、白金、アル
ミニウム、コバルト、スズ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、ＴｉＮ等の窒化物等が挙げられ
るが、絶対反射率が高く安定性に優れている点から金が
最適である。反射層の最適膜厚については、特に制限は
ないが４００〜１３００オングストロ−ムの範囲が好ま
しい。When the optical recording medium of the present invention has a reflective layer, the material of the reflective layer is a metal such as gold, silver, copper, platinum, aluminum, cobalt or tin, and an alloy containing these as the main components. Examples thereof include metal oxides such as MgO, ZnO, and SnO, and nitrides such as SiN 4 , AlN, and TiN. Gold is most preferable because it has a high absolute reflectance and excellent stability. The optimum film thickness of the reflective layer is not particularly limited, but is preferably in the range of 400 to 1300 angstrom.
【００２１】本発明の光記録媒体は、媒体の化学的劣化
（例えば酸化、吸水等）および物理的劣化（傷、けずれ
等）を防ぐ目的で媒体を保護するための保護層を透明基
板のレーザー入射面側および記録膜上または記録膜上に
反射膜が積層されている場合にはその反射膜の上に設け
てもよい。保護層用の材料としては、紫外線硬化型樹脂
を用いて、スピンコ−トにより塗布し、紫外線照射によ
り硬化させる方法が好ましいがこれに限定されるもので
はない。保護層の最適膜厚については、薄い場合には、
保護の効果が低下し、厚い場合には樹脂の硬化時の収縮
により媒体のそり等の機械特性の悪化の原因になるた
め、２〜２０ミクロンの範囲で成膜することが好まし
い。また、保護膜以外の機能、例えば反射防止、帯電防
止、防湿性付与等を目的として、低屈折率材料、フッ素
樹脂あるいは導電性樹脂等を保護膜と同様に透明基板の
レーザー入射面側および記録膜上または記録膜上に反射
膜が積層されている場合にはその反射膜の上に設けても
よい。In the optical recording medium of the present invention, a protective layer for protecting the medium is provided on the transparent substrate for the purpose of preventing chemical deterioration (for example, oxidation, water absorption, etc.) and physical deterioration (scratches, scratches, etc.) of the medium. When a reflection film is laminated on the laser incident surface side and on the recording film or on the recording film, it may be provided on the reflection film. As a material for the protective layer, a method in which an ultraviolet curable resin is used and applied by spin coating and cured by ultraviolet irradiation is preferable, but the material is not limited thereto. Regarding the optimum thickness of the protective layer, if it is thin,
Since the effect of protection is lowered and when the resin is thick, shrinkage during curing of the resin causes deterioration of mechanical properties such as warpage of the medium, it is preferable to form a film within a range of 2 to 20 μm. Further, for the purpose of functions other than the protective film, for example, antireflection, antistatic, moistureproof, etc., a low-refractive index material, a fluororesin or a conductive resin, etc. are formed on the transparent substrate at the laser incident surface side and recording like the protective film. When a reflective film is laminated on the film or the recording film, it may be provided on the reflective film.
【００２２】[0022]
【実施例】以下の実施例により本発明を具体的に説明す
るが、本発明は以下の実施例に限定されるものではな
い。なお例中、部とは重量部を表わす。The present invention will be described in detail with reference to the following examples, but the present invention is not limited to the following examples. In the examples, “part” means “part by weight”.
【００２３】実施例１ １．２ｍｍ厚さのポリカーボネート基板に透明層の上に
フタロシアニン化合物（ａ）３０ｍｇに対してテトラフ
ルオロプロパノール１ｍｌの濃度で溶解し、０．２ミク
ロンのフィルタ−を通して調整した塗液を用いて、スピ
ンコ−タ−により膜厚１５００オングストロ−ムに記録
層を成膜した。さらに、このようにして得た記録層の上
にスパッタリングにより金膜を厚さ１０００オングスト
ロ−ムに成膜した。さらに、この上に紫外線硬化樹脂に
より保護層を５ミクロンの膜厚で設けて、光ディスクを
作成した。このようにして作成した光ディスクについ
て、パルステック製光ディスク評価機およびヒューレッ
ト・パッカード製ファンクションジェネレーターを用い
て、波長７８５ｎｍ、Ｎ．Ａ．＝０．５の半導体レ−ザ
−で線速度１１ｍ／ｓｅｃおよび１８ｍ／ｓｅｃによ
り、周波数８．５ＭＨｚの単一信号の記録再生特性の評
価を行った。その結果、レーザー照射記録部の反射レベ
ルが未照射部より高くなり、通常の光ディスクの場合の
極性とは反転した記録になるが、１８ｍ／ｓｅｃでも記
録パワー１０ｍＷでＣ／Ｎ比が４５ｄＢ以上、さらにジ
ッターも５ｎｓｅｃであった。この記録再生特性は高
速、高密度記録に十分対応できる特性であり、映像、ア
ナログ音声、デジタル音声のそれぞれの信号をＬＤフォ
ーマットでＦＭ変調する通常のＬＤの記録信号に十分対
応できるレベルであった。Example 1 A polycarbonate substrate having a thickness of 1.2 mm was dissolved on a transparent layer in a concentration of 1 ml of tetrafluoropropanol with respect to 30 mg of the phthalocyanine compound (a), and the coating was adjusted through a 0.2-micron filter. The liquid was used to form a recording layer with a film thickness of 1500 angstrom by a spin coater. Further, a gold film having a thickness of 1000 angstrom was formed on the recording layer thus obtained by sputtering. Further, a protective layer having a film thickness of 5 μm was formed thereon by using an ultraviolet curable resin to prepare an optical disc. The optical disc prepared in this manner was measured by an optical disc evaluator manufactured by Pulstec and a function generator manufactured by Hewlett-Packard, at a wavelength of 785 nm, and an N.M. A. The recording and reproducing characteristics of a single signal with a frequency of 8.5 MHz were evaluated with a semiconductor laser of = 0.5 at linear velocities of 11 m / sec and 18 m / sec. As a result, the reflection level of the laser-irradiated recording portion becomes higher than that of the non-irradiated portion, and the recording is reversed from the polarity of the case of an ordinary optical disk, but even at 18 m / sec, the C / N ratio is 45 dB or more at a recording power of 10 mW Further, the jitter was 5 nsec. This recording / reproducing characteristic is a characteristic that can sufficiently cope with high-speed and high-density recording, and is a level that can sufficiently cope with a normal LD recording signal that FM-modulates each signal of video, analog audio, and digital audio in the LD format. .
【００２４】フタロシアニン化合物（ａ）Phthalocyanine compound (a)
【化３】 [Chemical 3]
【００２５】実施例２ 実施例１の方法により作成した光ディスクに実施例１と
同様の条件（１８ｍ／ｓｅｃ、１０ｍＷ出力）で記録を
行った後、保護膜および反射膜を除去し、記録膜の顕微
鏡観察を行った結果、レーザーが照射された記録部分に
形状変化に由来するピットの形成はまったく観察されな
かった。Example 2 After recording on the optical disk produced by the method of Example 1 under the same conditions as in Example 1 (18 m / sec, 10 mW output), the protective film and the reflective film were removed to remove the recording film. As a result of microscopic observation, formation of pits due to shape change was not observed at all in the recording portion irradiated with the laser.
【００２６】実施例３ 実施例１の方法により作成した光ディスクに実施例１と
同様の条件（１８ｍ／ｓｅｃ、１０ｍＷ出力）でデイス
ク全面記録を行った後、保護膜および反射膜を除去し、
透明基板／フタロシアニン化合物（ａ）単膜の透過スぺ
クトルを測定した。この透過スペクトルと記録前の透明
基板／フタロシアニン化合物（ａ）単膜の透過スぺクト
ルを比較した図を図１に示す。図から明かなように、レ
ーザー照射部と未照射部が混在する記録後の透過スペク
トルは、レーザー照射がなされていない記録前の透過ス
ペクトルに比較して、再生レーザーの波長域である７６
０〜８００ｎｍ付近の透過率が高くなっており、レーザ
ー照射により、光透過性が変化し、記録がなされている
ことが確認できた。また、これらの記録前および記録後
の透明基板／フタロシアニン化合物（ａ）単膜のＸ線回
折パターンを測定したところ、両者とも明確なピークは
観測されず、記録前（図２）および記録後（図３）のい
ずれも記録膜の状態は非晶質であった。Example 3 The entire surface of the disk was recorded on the optical disk produced by the method of Example 1 under the same conditions as in Example 1 (18 m / sec, 10 mW output), and then the protective film and the reflective film were removed.
The transmission spectrum of the transparent substrate / phthalocyanine compound (a) single film was measured. A diagram comparing this transmission spectrum with the transmission spectrum of the transparent substrate / phthalocyanine compound (a) single film before recording is shown in FIG. As is clear from the figure, the transmission spectrum after recording in which the laser-irradiated portion and the non-irradiated portion are mixed is in the wavelength region of the reproducing laser as compared with the transmission spectrum before recording in which laser irradiation is not performed.
It was confirmed that the transmittance was high in the vicinity of 0 to 800 nm, the light transmittance was changed by the laser irradiation, and recording was performed. Further, when the X-ray diffraction pattern of the transparent substrate / phthalocyanine compound (a) single film before and after recording was measured, no clear peak was observed in both, and before recording (FIG. 2) and after recording ( In all of FIG. 3), the state of the recording film was amorphous.
【００２７】[0027]
【図１】[Figure 1]
【００２８】[0028]
【図２】[Fig. 2]
【００２９】[0029]
【図３】[Figure 3]
【００３０】[0030]
【発明の効果】本発明の構成で光学記録媒体は、レ−ザ
−光線によりピットの形成を伴わず、再生レーザー波長
域の光透過性のみ変化する記録が可能となるため、非常
に鮮明な時間分解能を有し、高感度で高密度の記録、再
生できる良好な記録が実現でき、微小記録および高速記
録に対応する光学記録媒体になり得る。With the construction of the present invention, an optical recording medium can be recorded with a laser beam without changing the light transmittance in the reproduction laser wavelength range without forming pits. It is possible to realize an excellent recording that has time resolution, high sensitivity, high density recording and reproduction, and can be an optical recording medium compatible with minute recording and high speed recording.
【００３１】[0031]
図１はフタロシアニン化合物（ａ）記録前および記録後
の透過スぺクトルである。 図２は７８０ｎｍのレーザー光照射前のＸ線回折図であ
る。 図３は７８０ｎｍのレーザー光照射後のＸ線回折図であ
る。FIG. 1 shows the transmission spectrum of the phthalocyanine compound (a) before and after recording. FIG. 2 is an X-ray diffraction diagram before irradiation with 780 nm laser light. FIG. 3 is an X-ray diffraction diagram after irradiation with laser light of 780 nm.
Claims (1)
膜の積層体で構成され、非晶質有機色素記録膜が透明基
板より入射する記録レーザー光を吸収することにより発
生する熱エネルギーによって、分解、融解、蒸発あるい
は昇華の状態変化によるピットの形成、または相転移を
伴わない再生レーザー光波長域の光透過率が変化するこ
とを利用した光記録媒体において、非晶質有機色素記録
膜が、下記一般式［１］で示される化合物であることを
特徴とする光学記録媒体。 一般式［１］ 【化１】 Ｙ1 〜Ｙ4 は、それぞれ独立にハロゲン原子、置換基を
有しても良いアルキル基、置換基を有しても良いシクロ
アルキル基、置換基を有しても良いアリール基置換基を
有しても良いアシル基、置換基を有しても良い複素環残
基、ニトロ基、シアノ基、スルホン酸基、カルボン酸
基、−ＯＲ1 、−ＳＲ2 、−ＣＯＯＲ1 、 −Ｎ＝ＣＨＲ1 ここで、Ｒ1 およびＲ2 は、互いに同一であっても異な
っていても良く、水素原子、置換基を有していても良い
アルキル基、置換基を有していても良いアリール基、置
換基を有していても良いシクロアルキル基、置換基を有
していても良いアシル基、またはポリエーテル基を表
し、また、Ｒ1 とＲ2 で４〜７員環を形成していても良
く、その際、さらに窒素原子、酸素原子、イオウ原子等
のヘテロ原子を含む複素環であっても良い。Ｍは、シリ
コン、ゲルマニウムを表す。ｌ1 〜ｌ4 、ｍ1 〜ｍ
4 は、それぞれＸ1 〜Ｘ4 、Ｙ1 〜Ｙ4 の置換基数を表
す。ｌ1 〜ｌ4 は、それぞれ独立に０〜４の整数を表す
が、すべて同時に０となることはない。ｍ１〜ｍ４は、
それぞれ独立に０〜４の整数を表す。］1. Heat generated when a recording laser beam incident from a transparent substrate is absorbed by the amorphous organic dye recording film, which is composed of a laminated body of a transparent substrate / amorphous organic dye recording film / reflection film. An amorphous organic dye is used in an optical recording medium utilizing the fact that pits are formed due to a change in the state of decomposition, melting, evaporation or sublimation due to energy, or the light transmittance in the reproduction laser light wavelength region is not accompanied by a phase transition. An optical recording medium, wherein the recording film is a compound represented by the following general formula [1]. General formula [1] Y 1 to Y 4 each independently have a halogen atom, an alkyl group which may have a substituent, a cycloalkyl group which may have a substituent, or an aryl group which may have a substituent. Optionally an acyl group, a heterocyclic residue which may have a substituent, a nitro group, a cyano group, a sulfonic acid group, a carboxylic acid group, —OR 1 , —SR 2 , —COOR 1 , —N═CHR 1 Here, R 1 and R 2 may be the same or different from each other, and may be a hydrogen atom, an alkyl group which may have a substituent, or a substituent which may have a substituent. It represents a good aryl group, a cycloalkyl group which may have a substituent, an acyl group which may have a substituent, or a polyether group, and R 1 and R 2 each represent a 4- to 7-membered ring. It may be formed, and in that case, it may be a heterocycle further containing a hetero atom such as a nitrogen atom, an oxygen atom and a sulfur atom. M represents silicon or germanium. l 1 to l 4 , m 1 to m
4 each represent the number of substituents of X 1 ~X 4, Y 1 ~Y 4. l 1 to l 4 each independently represent an integer of 0 to 4, but are not all 0 at the same time. m1-m4 are
Each independently represents an integer of 0 to 4. ]
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4223460A JPH0648045A (en) | 1992-07-30 | 1992-07-30 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4223460A JPH0648045A (en) | 1992-07-30 | 1992-07-30 | Optical recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0648045A true JPH0648045A (en) | 1994-02-22 |
Family
ID=16798501
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4223460A Pending JPH0648045A (en) | 1992-07-30 | 1992-07-30 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0648045A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5707245A (en) * | 1994-06-07 | 1998-01-13 | The Whitaker Corporation | Card connector with an ejection mechanism and a flexible printed circuit harness therefor |
| US5980276A (en) * | 1997-09-19 | 1999-11-09 | Mitsubishi Denki Kabushiki Kaisha | Electronic apparatus with a card interface |
| US6166722A (en) * | 1996-10-29 | 2000-12-26 | Mitsubishi Denki Kabushiki Kaisha | Portable electronic apparatus having pointing device |
| US7378220B2 (en) | 2001-06-28 | 2008-05-27 | Fujifilm Corporation | Optical information recording method and medium |
-
1992
- 1992-07-30 JP JP4223460A patent/JPH0648045A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5707245A (en) * | 1994-06-07 | 1998-01-13 | The Whitaker Corporation | Card connector with an ejection mechanism and a flexible printed circuit harness therefor |
| US5899758A (en) * | 1994-06-07 | 1999-05-04 | The Whitaker Corporation | Flexible printed circuit harness |
| US6166722A (en) * | 1996-10-29 | 2000-12-26 | Mitsubishi Denki Kabushiki Kaisha | Portable electronic apparatus having pointing device |
| US5980276A (en) * | 1997-09-19 | 1999-11-09 | Mitsubishi Denki Kabushiki Kaisha | Electronic apparatus with a card interface |
| US7378220B2 (en) | 2001-06-28 | 2008-05-27 | Fujifilm Corporation | Optical information recording method and medium |
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