JPH038022B2 - - Google Patents
Info
- Publication number
- JPH038022B2 JPH038022B2 JP56181022A JP18102281A JPH038022B2 JP H038022 B2 JPH038022 B2 JP H038022B2 JP 56181022 A JP56181022 A JP 56181022A JP 18102281 A JP18102281 A JP 18102281A JP H038022 B2 JPH038022 B2 JP H038022B2
- Authority
- JP
- Japan
- Prior art keywords
- information recording
- layer
- recording medium
- resin
- substrate
- 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
- 230000003287 optical effect Effects 0.000 claims description 12
- 239000000758 substrate Substances 0.000 claims description 11
- 150000001875 compounds Chemical class 0.000 claims description 10
- 239000010410 layer Substances 0.000 description 21
- 238000000034 method Methods 0.000 description 13
- 239000011241 protective layer Substances 0.000 description 9
- 239000010408 film Substances 0.000 description 8
- 239000002184 metal Substances 0.000 description 7
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000010409 thin film Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- VLTRZXGMWDSKGL-UHFFFAOYSA-M perchlorate Inorganic materials [O-]Cl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-M 0.000 description 6
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 6
- -1 phthalocyanine compound Chemical class 0.000 description 6
- 230000035945 sensitivity Effects 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 229910052759 nickel Inorganic materials 0.000 description 4
- YMWUJEATGCHHMB-UHFFFAOYSA-N Dichloromethane Chemical compound ClCCl YMWUJEATGCHHMB-UHFFFAOYSA-N 0.000 description 3
- 229910017052 cobalt Inorganic materials 0.000 description 3
- 239000010941 cobalt Substances 0.000 description 3
- 150000002739 metals Chemical class 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920005989 resin Polymers 0.000 description 3
- 239000011347 resin Substances 0.000 description 3
- 239000004065 semiconductor Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 238000001771 vacuum deposition Methods 0.000 description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 239000000975 dye Substances 0.000 description 2
- 150000002148 esters Chemical class 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 229910010272 inorganic material Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920000620 organic polymer Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Chemical compound [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- VZSRBBMJRBPUNF-UHFFFAOYSA-N 2-(2,3-dihydro-1H-inden-2-ylamino)-N-[3-oxo-3-(2,4,6,7-tetrahydrotriazolo[4,5-c]pyridin-5-yl)propyl]pyrimidine-5-carboxamide Chemical compound C1C(CC2=CC=CC=C12)NC1=NC=C(C=N1)C(=O)NCCC(N1CC2=C(CC1)NN=N2)=O VZSRBBMJRBPUNF-UHFFFAOYSA-N 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910020366 ClO 4 Inorganic materials 0.000 description 1
- 229910016509 CuF 2 Inorganic materials 0.000 description 1
- 238000005684 Liebig rearrangement reaction Methods 0.000 description 1
- 239000000020 Nitrocellulose Substances 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229920002396 Polyurea Polymers 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000000862 absorption spectrum Methods 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000007606 doctor blade method Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 229920001519 homopolymer Polymers 0.000 description 1
- 150000002484 inorganic compounds Chemical class 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000113 methacrylic resin Substances 0.000 description 1
- 229920001220 nitrocellulos Polymers 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 239000000123 paper Substances 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 229920003214 poly(methacrylonitrile) Polymers 0.000 description 1
- 229920002492 poly(sulfone) Polymers 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920013716 polyethylene resin Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 229920005990 polystyrene resin Polymers 0.000 description 1
- 229920002689 polyvinyl acetate Polymers 0.000 description 1
- 239000011118 polyvinyl acetate Substances 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000010979 ruby Substances 0.000 description 1
- 229910001750 ruby Inorganic materials 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000001308 synthesis method Methods 0.000 description 1
- 238000001947 vapour-phase growth Methods 0.000 description 1
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
-
- 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
-
- 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
- G11B7/248—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 porphines; azaporphines, e.g. phthalocyanines
-
- 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
- G11B7/254—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 protective topcoat layers
- G11B7/2542—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 protective topcoat layers consisting essentially of organic resins
-
- 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
- G11B7/258—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 reflective layers
- G11B7/2585—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 reflective layers based on aluminium
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
本発明はテトラデヒドロコリン化合物からなる
情報記録層を有する光学的情報記録媒体に関す
る。
従来、この種の光学的情報記録媒体としては、
種々の構成のものが知られている。例えば特開昭
55−97033号公報には基板上にフタロシアニン化
合物からなる単層の情報記録層を設けたものが開
示されている。
しかしながら、かかる有機物色素は、金属等の
無機化合物に比して反射率や融点が比較的低い
上、特定の波長においてだけ吸収率が極大を示す
ようなものが多い。
これ等の欠点を解決するために情報記録層を二
層構造とした情報記録媒体が提案されている。す
なわち、反射率の高い物質たとえばAl，Ag，
Pb，Cu，Na，Crなどの金属薄膜を情報記録層
と基板との間か、あるいは情報記録層の上に設け
る態様である。しかしながら、かかる情報記録媒
体はコントラストが向上するものの単層型の記録
層のものに比較して高反射率層を設けるために製
造工程が煩雑となる上、記録層と高反射率層の境
界面にチリ、ホコリなどの異物が混入することも
あり、品質管理に問題を残し、さらに高反射率層
は空気中で酸化を受け光学的特性が劣化しその信
頼性の悪化するという欠点がある。加えて、かか
る二層構造の情報記録媒体はレーザー光の飛散が
原因となつて記録が充分に行なわれず記録感度が
低いという難点を有している。
本発明は上記従来技術の実情に鑑みなされたも
のであつて、その目的は広範囲の波長帯域に亘つ
て優れた吸収特性を示すと共に記録感度に優れ、
しかもその生産コストも低廉な光学的情報記録媒
体を堤供することにある。
すなわち、本発明によれば、基板上にテトラデ
ヒドロコリン化合物からなる情報記録層を設けた
ことを特徴とする、レーザー光線によつて状態変
化を生ぜしめることにより記録再生を行なうため
の光学的情報記録媒体が提供される。
本発明において情報記録層の形成成分として用
いるテトラデヒドロコリン化合物は次の一般式に
より示される。
The present invention relates to an optical information recording medium having an information recording layer made of a tetradehydrocholine compound. Conventionally, as this type of optical information recording medium,
Various configurations are known. For example, Tokukai Akira
Japanese Patent No. 55-97033 discloses a device in which a single-layer information recording layer made of a phthalocyanine compound is provided on a substrate. However, such organic dyes have relatively low reflectance and melting point compared to inorganic compounds such as metals, and many of them exhibit maximum absorption only at specific wavelengths. In order to solve these drawbacks, an information recording medium having a two-layered information recording layer has been proposed. In other words, materials with high reflectivity such as Al, Ag,
In this embodiment, a metal thin film such as Pb, Cu, Na, Cr, etc. is provided between the information recording layer and the substrate or on the information recording layer. However, although such information recording media have improved contrast, the manufacturing process is complicated due to the provision of a high reflectance layer compared to single-layer type recording layers, and the interface between the recording layer and the high reflectance layer Foreign substances such as dirt and dust may get mixed into the film, leaving problems in quality control.Furthermore, the high reflectance layer is oxidized in the air, degrading its optical properties and reducing its reliability. In addition, such a two-layered information recording medium has the disadvantage that recording cannot be performed sufficiently due to scattering of laser light, resulting in low recording sensitivity. The present invention has been made in view of the above-mentioned state of the prior art, and its purpose is to exhibit excellent absorption characteristics over a wide range of wavelength bands, as well as to have excellent recording sensitivity.
Moreover, the objective is to provide an optical information recording medium whose production cost is low. That is, according to the present invention, there is provided an optical information recording for recording and reproducing by causing a state change with a laser beam, characterized in that an information recording layer made of a tetradehydrocholine compound is provided on a substrate. Media provided. The tetradehydrocholine compound used as a forming component of the information recording layer in the present invention is represented by the following general formula.
【式】
Ｒ R1 Ｍ
CH3 CH3 Ni()
CO2C2H5 CH3 Ni()
CH3 Ｈ Ni()
CH3 CH3 Co()
CH3 CH3 Co()
Ｘ・BrまたはClO4
これらテトラデヒドロコリン化合物の代表的な
例としては、たとえば１，２，３，７，８，12，
13，17，18，19−デカメチル−テトラデヒドロコ
リネート−ニツケル（）パークロレート、１，
19−ジエトキシカルボニル−２，３，７，８，
12，13，17，18−オクタメチル−テトラデヒドロ
コリネート−ニツケル（）パークロレート、
１，３，７，８，12，13，17，19−オクタメチル
−テトラデヒドロコリネート−ニツケル（）パ
ークロレート、１，２，３，７，８，12，13，
17，18，19−デカメチル−テトラデヒドロコリネ
ート−コバルト（）パークロレート、１，２，
３，７，８，12，13，17，18，19−デカメチル−
テトラデヒドロコリネート−コバルト（）パー
クロレートなどをあげることができる。
これらの化合物は550〜800nmの波長帯域で吸
収を有し、しかも吸収係数が104〜105cm-1の値を
有するものである。
かかるテトラデヒドロコリン化合物の合成法お
よび性質特に吸収スペクトルについては、たとえ
ば「Liebigs Ann.Chem.」第738巻第１〜17頁
（1970）に記述されている。
本発明による光学的情報記録媒体の代表的な４
例の断面図を添付図面に示す。第１図は基板１と
情報記録層２だけからなり保護層のない場合、そ
して第２図は保護層３のある場合である。保護層
の存在は必須ではないが望ましい。第３図は基板
１と情報記録層２の間に高い反射率を有する金属
４をもつてサンドイツチ構造とした場合であり、
そして第４図は第３図に示すサンドイツチ構造の
上に保護層３のある場合である。保護層の存在は
必須ではないが望ましい。
本発明の構成についてさらに詳細に述べれば、
基板材料は使用レーザー光に対して透明であつて
も不透明であつてもよい。ただし、基板側からレ
ーザー光で書込み記録を行なう場合は書込みレー
ザー光に対して透明でなければならない。基板と
反対側から書込み記録を行なう場合は書込みレー
ザー光に対して透明である必要はない。しかしな
がら読み出し再生を透過光で行なう場合は、読み
出しレーザー光に対して透明でなければならな
い。
かかる基板材料としてはガラス、プラスチツク
ス、紙、板状または箔状の金属等の一般の記録材
料の支持体でよい。特にプラスチツクスが安全
性、記録感度の向上、平面性の点から好適であ
る。代表的なプラスチツクスとしては塩化ビニル
樹脂、酢酸ビニル樹脂、アクリル樹脂、メタクリ
ル樹脂、ポリエステル樹脂、ニトロセルロース、
ポリエチレン樹脂、ポリプロピレン樹脂、ポリア
ミド樹脂、ポリスチレン樹脂、ポリカーボネート
樹脂、エポキシ樹脂などがあげられる。
高反射率の金属としては代表的にはAl，Ag，
Pt，Cu，Ni，Fe，Auなどがあげられるが、特
にAlの使用が好ましい。
本発明の情報記録層は、前記したようにテトラ
デヒドロコリン化合物で構成されるが、その膜厚
は100Å〜5μm、好ましくは1000Å〜3μmである。
情報記録層は真空蒸着法、スパツタリング法、ド
クターブレード法、キヤスト法、スピナー法、浸
漬法等一般に行なわれている薄膜形成法で成膜す
ることができる。特にスピナー法、浸漬法がすぐ
れている。また、必要に応じてバインダーと混合
して成膜することができる。
保護層の存在は必須ではないが必要に応じて使
用してもよい。使用する場合は、レーザー光に対
して透明であり、機械的強度が大で、記録層と反
応しにくく、皮膜性がよいものであればどのよう
なものであつてもよい。このような形成材料とし
てはたとえばAl2O3，SiO2、SiO、MgO、ZnO、
MgF2，CuF2等の無機材料があげられる。この場
合その膜厚は50〜5000Å、好ましくは100〜2000
Åであり、成膜法は真空蒸着法、スパツタリング
法、イオンプレート法、イオンクラスタ法、グロ
ー放電法などの一般に行なわれている薄膜形成法
でよい。また、有機材料としては成膜性、加工性
の点から有機高分子化合物が好ましく使用され
る。このような有機高分子化合物としてはたとえ
ばポリスチレン、ポリエステル、ポリカーボネー
ト、ポリキシレン、ポリ塩化ビニル、ポリアクリ
ロニトリル、ポリメタクリロニトリル、ポリアク
リル酸エステル、ポリメタクリル酸エステル、ポ
リ酢酸ビニル、ポリエチレン、ポリプロピレン、
ポリエポキシ、ポリアミド、ポリ尿素、ポリスル
フオン、フエノール樹脂等の単独重合体および共
重合体等があげられる。この場合の膜厚は0.1〜
5μm、好ましくは0.5〜2μmとし、成膜法は真空
蒸着法、スパツタリング法、気相成長法、グロー
放電法、溶剤塗布法などの一般に行なわれている
薄膜形成法でよい。
本発明の光学的情報記録媒体に関して使用され
るレーザー光はN2，He−Cd，Ar，He−Ne、ル
ビー、半導体、色素レーザーなどがあげられる。
特に軽量性、取り扱いの容易さ、コンパクト性な
どの点から半導体レーザーが好適である。
実施例 １
厚さ１mmのガラス板を１，２，３，７，８，
12，13，17，18，19−デカメチル−テトラデヒド
ロコリネート−コバルト（）パークロレートの
ジクロロメタン溶液に浸漬したのち、乾燥して膜
厚5000Åの情報記録層を設け、本発明の光学的情
報記録媒体を作製した。この記録媒体に薄膜面か
らHe−Neレーザーを2.4μmのビーム径で照射面
での照射パワーを5mWにして照射した。記録媒
体を910μm／秒で移動させながら記録を行なつた
結果、記録感度は3nJ／ビツトであつた。
実施例 ２
実施例１の光学的情報記録媒体の薄膜面から
820nm（松下電産製）の半導体レーザーをパルス
幅1μm秒、薄膜面での照射パワー4mW、ビーム
径1.6μmにして照射した。記録媒体を910μm／秒
で移動させながら記録を行なつた結果、記録感度
は1nJ／ビツトであつた。[Formula] R R 1 M CH 3 CH 3 Ni() CO 2 C 2 H 5 CH 3 Ni() CH 3 H Ni() CH 3 CH 3 Co() CH 3 CH 3 Co() X・Br or ClO 4 Typical examples of these tetradehydrocholine compounds include 1, 2, 3, 7, 8, 12,
13,17,18,19-decamethyl-tetradehydrocolinate-nickel()perchlorate, 1,
19-diethoxycarbonyl-2,3,7,8,
12,13,17,18-octamethyl-tetradehydrocolinate-nickel ()perchlorate,
1,3,7,8,12,13,17,19-octamethyl-tetradehydrocolinate-nickel()perchlorate, 1,2,3,7,8,12,13,
17,18,19-decamethyl-tetradehydrocolinate-cobalt()perchlorate, 1,2,
3,7,8,12,13,17,18,19-decamethyl-
Examples include tetradehydrocolinate-cobalt ()perchlorate. These compounds have absorption in the wavelength band of 550 to 800 nm and have absorption coefficients of 10 4 to 10 5 cm -1 . The synthesis method and properties, particularly absorption spectra, of such tetradehydrocholine compounds are described, for example, in "Liebigs Ann. Chem.", Vol. 738, pp. 1-17 (1970). 4 representative optical information recording media according to the present invention
An example cross-sectional view is shown in the accompanying drawings. FIG. 1 shows a case consisting of only a substrate 1 and an information recording layer 2 without a protective layer, and FIG. 2 shows a case with a protective layer 3. The presence of a protective layer is not essential but desirable. FIG. 3 shows a case where a metal 4 having a high reflectance is placed between the substrate 1 and the information recording layer 2 to form a sandwich structure.
FIG. 4 shows a case in which a protective layer 3 is provided on the sandwich structure shown in FIG. 3. The presence of a protective layer is not essential but desirable. To describe the configuration of the present invention in more detail,
The substrate material may be transparent or opaque to the laser light used. However, when writing and recording is performed using a laser beam from the substrate side, it must be transparent to the writing laser beam. When writing and recording is performed from the side opposite to the substrate, it is not necessary to be transparent to the writing laser beam. However, when read and reproduced using transmitted light, it must be transparent to the read laser beam. Such substrate materials may be common recording material supports such as glass, plastics, paper, plate-like or foil-like metals. In particular, plastics are preferred from the viewpoints of safety, improved recording sensitivity, and flatness. Typical plastics include vinyl chloride resin, vinyl acetate resin, acrylic resin, methacrylic resin, polyester resin, nitrocellulose,
Examples include polyethylene resin, polypropylene resin, polyamide resin, polystyrene resin, polycarbonate resin, and epoxy resin. Typical metals with high reflectance are Al, Ag,
Examples include Pt, Cu, Ni, Fe, Au, etc., but it is particularly preferable to use Al. The information recording layer of the present invention is composed of a tetradehydrocholine compound as described above, and has a thickness of 100 Å to 5 μm, preferably 1000 Å to 3 μm.
The information recording layer can be formed by a commonly used thin film forming method such as a vacuum evaporation method, a sputtering method, a doctor blade method, a cast method, a spinner method, or a dipping method. In particular, the spinner method and dipping method are excellent. Further, it can be mixed with a binder to form a film if necessary. The presence of a protective layer is not essential, but may be used if necessary. When used, any material may be used as long as it is transparent to laser light, has high mechanical strength, does not easily react with the recording layer, and has good film properties. Examples of such forming materials include Al 2 O 3 , SiO 2 , SiO, MgO, ZnO,
Examples include inorganic materials such as MgF 2 and CuF 2 . In this case, the film thickness is 50 to 5000 Å, preferably 100 to 2000 Å.
The film forming method may be a commonly used thin film forming method such as a vacuum evaporation method, a sputtering method, an ion plate method, an ion cluster method, or a glow discharge method. Further, as the organic material, an organic polymer compound is preferably used from the viewpoint of film formability and processability. Examples of such organic polymer compounds include polystyrene, polyester, polycarbonate, polyxylene, polyvinyl chloride, polyacrylonitrile, polymethacrylonitrile, polyacrylic ester, polymethacrylic ester, polyvinyl acetate, polyethylene, polypropylene,
Examples include homopolymers and copolymers of polyepoxy, polyamide, polyurea, polysulfone, phenol resin, and the like. In this case, the film thickness is 0.1~
The thickness is 5 μm, preferably 0.5 to 2 μm, and the film forming method may be a commonly used thin film forming method such as a vacuum evaporation method, a sputtering method, a vapor phase growth method, a glow discharge method, or a solvent coating method. Laser beams used for the optical information recording medium of the present invention include N2 , He--Cd, Ar, He--Ne, ruby, semiconductor, and dye lasers.
Semiconductor lasers are particularly suitable because of their light weight, ease of handling, and compactness. Example 1 1 mm thick glass plates 1, 2, 3, 7, 8,
The optical information recording layer of the present invention is prepared by immersing 12,13,17,18,19-decamethyl-tetradehydrocolinate-cobalt () perchlorate in a dichloromethane solution and then drying to form an information recording layer with a thickness of 5000 Å. A medium was prepared. This recording medium was irradiated with a He-Ne laser from the thin film surface with a beam diameter of 2.4 μm and an irradiation power of 5 mW at the irradiation surface. As a result of recording while moving the recording medium at 910 μm/sec, the recording sensitivity was 3 nJ/bit. Example 2 From the thin film surface of the optical information recording medium of Example 1
Irradiation was performed using an 820 nm (manufactured by Matsushita Electric) semiconductor laser with a pulse width of 1 μm seconds, irradiation power on the thin film surface of 4 mW, and a beam diameter of 1.6 μm. As a result of recording while moving the recording medium at 910 μm/sec, the recording sensitivity was 1 nJ/bit.
第１図は本発明の光学的情報記録媒体の基本的
構成を示す断面図であり、第２図は第１図の光学
的情報記録媒体において保護層を設けた態様の記
録媒体の断面図であり、第３図は高い反射率を有
する金属層でサンドイツチ構造にした記録媒体の
断面図であり、第４図は第３図に示すサンドイツ
チ構造に保護層を設けた態様の記録媒体の断面図
である。
１……基板、２……情報記録層、３……保護
層、４……高い反射率を有する金属。
FIG. 1 is a sectional view showing the basic structure of the optical information recording medium of the present invention, and FIG. 2 is a sectional view of the optical information recording medium of FIG. 1 in which a protective layer is provided. 3 is a cross-sectional view of a recording medium having a sanderch structure with a metal layer having a high reflectance, and FIG. 4 is a cross-sectional view of a recording medium in which a protective layer is provided on the sanderch structure shown in FIG. 3. It is. DESCRIPTION OF SYMBOLS 1... Substrate, 2... Information recording layer, 3... Protective layer, 4... Metal having high reflectance.
Claims (1)
る情報記録層を設けたことを特徴とする、レーザ
ー光線によつて状態変化を生ぜしめることにより
記録再生を行なうための光学的情報記録媒体。1. An optical information recording medium for recording and reproducing by causing a state change with a laser beam, characterized in that an information recording layer made of a tetradehydrocholine compound is provided on a substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56181022A JPS5883345A (en) | 1981-11-13 | 1981-11-13 | optical information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56181022A JPS5883345A (en) | 1981-11-13 | 1981-11-13 | optical information recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5883345A JPS5883345A (en) | 1983-05-19 |
| JPH038022B2 true JPH038022B2 (en) | 1991-02-05 |
Family
ID=16093385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56181022A Granted JPS5883345A (en) | 1981-11-13 | 1981-11-13 | optical information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5883345A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6099697A (en) * | 1983-11-07 | 1985-06-03 | Ricoh Co Ltd | optical recording medium |
| US5486437A (en) * | 1993-04-08 | 1996-01-23 | Sony Corporation | Optical recording method |
-
1981
- 1981-11-13 JP JP56181022A patent/JPS5883345A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5883345A (en) | 1983-05-19 |
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