JP2591939B2 - Optical recording method and optical recording medium - Google Patents
Optical recording method and optical recording mediumInfo
- Publication number
- JP2591939B2 JP2591939B2 JP61089952A JP8995286A JP2591939B2 JP 2591939 B2 JP2591939 B2 JP 2591939B2 JP 61089952 A JP61089952 A JP 61089952A JP 8995286 A JP8995286 A JP 8995286A JP 2591939 B2 JP2591939 B2 JP 2591939B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- optical recording
- recording
- light
- 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 - Fee Related
Links
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- 238000000034 method Methods 0.000 title claims description 9
- 239000000758 substrate Substances 0.000 claims description 16
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- VTPWYQFCBWUDDW-UHFFFAOYSA-N benzene-1,2-dithiol;nickel Chemical compound [Ni].SC1=CC=CC=C1S VTPWYQFCBWUDDW-UHFFFAOYSA-N 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
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- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 2
- IPCSVZSSVZVIGE-UHFFFAOYSA-N hexadecanoic acid Chemical compound CCCCCCCCCCCCCCCC(O)=O IPCSVZSSVZVIGE-UHFFFAOYSA-N 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 238000010030 laminating Methods 0.000 description 2
- 230000031700 light absorption Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000002923 metal particle Substances 0.000 description 2
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- 239000000203 mixture Substances 0.000 description 2
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- IEQIEDJGQAUEQZ-UHFFFAOYSA-N phthalocyanine Chemical compound N1C(N=C2C3=CC=CC=C3C(N=C3C4=CC=CC=C4C(=N4)N3)=N2)=C(C=CC=C2)C2=C1N=C1C2=CC=CC=C2C4=N1 IEQIEDJGQAUEQZ-UHFFFAOYSA-N 0.000 description 2
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 208000035874 Excoriation Diseases 0.000 description 1
- 229930192627 Naphthoquinone Natural products 0.000 description 1
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- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
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- 238000010521 absorption reaction Methods 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009471 action Effects 0.000 description 1
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- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000003373 anti-fouling effect Effects 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
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- 239000000155 melt Substances 0.000 description 1
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- WQEPLUUGTLDZJY-UHFFFAOYSA-N n-Pentadecanoic acid Natural products CCCCCCCCCCCCCCC(O)=O WQEPLUUGTLDZJY-UHFFFAOYSA-N 0.000 description 1
- 150000002791 naphthoquinones Chemical class 0.000 description 1
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000012188 paraffin wax Substances 0.000 description 1
- 239000012994 photoredox catalyst Substances 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
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- 229920002647 polyamide Polymers 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
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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
-
- 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
- G11B7/004—Recording, reproducing or erasing methods; Read, write or erase circuits therefor
- G11B7/0045—Recording
-
- 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
- G11B7/243—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 inorganic materials only, e.g. ablative layers
- G11B7/2433—Metals or elements of Groups 13, 14, 15 or 16 of the Periodic Table, e.g. B, Si, Ge, As, Sb, Bi, Se or Te
-
- 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
- G11B7/245—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 a polymeric component
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は光記録方法及び光記録媒体に関するものであ
る。Description: TECHNICAL FIELD The present invention relates to an optical recording method and an optical recording medium.
［従来の技術］ 従来、光記録媒体としては光ビーム、例えばレーザー
光の照射により、ピット（孔）を生じるタイプやバブル
を形成するタイプおよび相変態を起こすタイプ等が知ら
れている。[Prior Art] Conventionally, as an optical recording medium, there are known a type in which pits (holes) are formed, a type in which bubbles are formed, and a type in which phase transformation is performed by irradiation of a light beam, for example, a laser beam.
これらの中で、ピット（孔）を形成するものは、支持
体上にTe,Bi,Sn,Sb,In等の低融点金属やシアニン系、ス
クワリウム系、フタロシアニン系、テトラデヒドロコリ
ン系、メチン系、ナフトキノン系、ベンゼンジチオール
ニッケル錯体等の染・顔料（有機色素）、及びこれら有
機色素と金属との複合系の薄膜を設けて構成されてい
る。Among these, those that form pits (holes) are formed on the support by low-melting-point metals such as Te, Bi, Sn, Sb, and In, cyanine, squalium, phthalocyanine, tetradehydrocholine, and methine. And a dye / pigment (organic dye) such as a naphthoquinone-based or benzenedithiol-nickel complex, and a composite thin film of these organic dye and metal.
これらの薄膜は光ビームの照射を受け、その吸収率に
応じて熱エネルギーにかえ、そのヒートモードによって
記録ピットを形成する。These thin films are irradiated with a light beam, converted into thermal energy in accordance with the absorptivity, and form recording pits in the heat mode.
この時の記録ピットは第３図に示すように記録ピット
５の周辺部がもりあがり、リム９とよばれる突起が生ず
る。At this time, as shown in FIG. 3, the periphery of the recording pit 5 of the recording pit rises, and a projection called a rim 9 is generated.
このリムは光記録媒体の溶融−凝固プロセスによって
生じるものであるが、そのプロセスは非常に複雑で、そ
の形状や大きさは常に一定にはならず、読み取りの際に
再生信号のエラーに結びつく欠点となっていた。This rim is caused by the melting-solidification process of the optical recording medium, but the process is very complicated, its shape and size are not always constant, and the drawbacks that lead to errors in the reproduced signal when reading are obtained. Had become.
［発明が解決しようとする問題点］ 本発明の目的は、上述の如き従来の欠点を解決するも
ので、リムの少くない、常に一定の大きさと形状を示す
記録ビットを形成することができる光記録方法を提供す
るものである。[Problems to be Solved by the Invention] An object of the present invention is to solve the above-mentioned conventional drawbacks, and to form a light beam having a small rim and capable of forming a recording bit having a constant size and shape at all times. A recording method is provided.
さらに、本発明の目的は再生信号のエラー率の小さ
い、信頼性の高い光記録媒体を提供するものである。Another object of the present invention is to provide a highly reliable optical recording medium having a small error rate of a reproduced signal.
［問題点を解決するための手段］及び［作用］ 即ち、本発明は、光吸収層、記録補助層及び光反射層
がこの順番で積層された光記録層が、該光吸収層が基板
と対向するように該基板上に配置された光記録媒体に光
ビームを照射して該記録補助層の光ビーム照射部を凹状
に変形せしめると共に該記録補助層の変形に沿って該光
反射層を凹状に変形せしめて該光反射層に記録ピットを
形成して情報の記録を行うことを特徴とする光記録方法
である。[Means for Solving the Problems] and [Action] That is, the present invention provides an optical recording layer in which a light absorbing layer, a recording auxiliary layer, and a light reflecting layer are laminated in this order, wherein the light absorbing layer is A light beam is applied to an optical recording medium disposed on the substrate so as to face the same, thereby deforming the light beam irradiating portion of the recording auxiliary layer into a concave shape, and forming the light reflecting layer along the deformation of the recording auxiliary layer. An optical recording method comprising recording information by forming a recording pit in the light reflecting layer by deforming the recording medium into a concave shape.
また、本発明は、光吸収層、記録補助層及び光反射層
がこの順番で積層された光記録層が、該光吸収層が基板
と対向するように該基板上に配置され、且つ該光記録層
に情報が記録されている光記録媒体において、凹状に変
形した記録補助層と該記録補助層の変形に沿って凹状に
変形した光反射層とによって形成されている記録ピット
によって該情報が該光記録層に記録されていることを特
徴とする光記録媒体である。Further, the present invention provides an optical recording layer in which a light absorbing layer, a recording auxiliary layer, and a light reflecting layer are laminated in this order, the optical recording layer being disposed on the substrate such that the light absorbing layer faces the substrate, and In an optical recording medium in which information is recorded on a recording layer, the information is formed by recording pits formed by a concavely deformed recording auxiliary layer and a light reflecting layer deformed concavely along the deformation of the recording auxiliary layer. An optical recording medium recorded on the optical recording layer.
以下、本発明の具体的構成を図面を用いて説明する。 Hereinafter, a specific configuration of the present invention will be described with reference to the drawings.
第１図は本発明の代表的な構成例を示す断面図であ
る。同第１図において、本発明の光記録媒体は光反射層
６と光吸収層８との間に、記録補助層７を介在せしめて
積層して光記録層2aを形成し、該光記録層2aを光吸収層
８が下になる様に基板３の上に設け、最外層に保護層４
を設けて光反射層６を保護してなるものである。FIG. 1 is a sectional view showing a typical configuration example of the present invention. In FIG. 1, the optical recording medium of the present invention is laminated by interposing a recording auxiliary layer 7 between a light reflecting layer 6 and a light absorbing layer 8 to form an optical recording layer 2a. 2a is provided on the substrate 3 so that the light absorbing layer 8 faces down, and the protective layer 4
Is provided to protect the light reflection layer 6.
本発明において、基板３はガラス板、セラミック板、
アルミ板、ステンレス板等の金属板、PVC,PMMA,PCなど
のプラスチック板などを使用することが出来る。基板は
透明・不透明を問わず、又、その大きさも光記録媒体の
支持体である機能を満足すれば特に制限は無く、場合に
よっては基板を省略してもよい。In the present invention, the substrate 3 is a glass plate, a ceramic plate,
A metal plate such as an aluminum plate and a stainless steel plate, and a plastic plate such as PVC, PMMA, and PC can be used. The substrate may be transparent or opaque, and its size is not particularly limited as long as it satisfies the function of supporting the optical recording medium. In some cases, the substrate may be omitted.
本発明において、光記録層2aが光反射層６と、記録補
助層７と、光吸収層８からなることが本発明の特徴の一
つである。In the present invention, one of the features of the present invention is that the optical recording layer 2a includes the light reflecting layer 6, the recording auxiliary layer 7, and the light absorbing layer 8.
光記録層としては、光ビームの照射を受けてその光を
吸収し、これを熱に変換してその熱によって記録ピット
を形成する、所謂、ヒートモード記録材料であり、しか
も信号の読み取りの為の反射を有していることが要求さ
れる。The optical recording layer is a so-called heat mode recording material that absorbs a light beam, absorbs the light, converts the light into heat, and forms a recording pit with the heat. Is required.
本発明は、この点に鑑み第１図に示される様に光反射
層６と記録補助層７および光吸収層８をそれぞれ順次積
層して光記録層とすることを特徴とするものである。In view of this point, the present invention is characterized in that an optical recording layer is formed by sequentially laminating a light reflection layer 6, a recording auxiliary layer 7, and a light absorption layer 8, as shown in FIG.
本発明において、光反射層は記録情報のS/Nを規定す
る重要な要因で、記録前の反射強度と記録後の反射強度
との比が大きいことが要求される。加えて、この光反射
層からの反射信号は光記録媒体の記録・再生にとって重
要なAT、AFを作動させる信号となる。In the present invention, the light reflection layer is an important factor that determines the S / N of recorded information, and is required to have a large ratio between the reflection intensity before recording and the reflection intensity after recording. In addition, the reflection signal from the light reflection layer becomes a signal for operating AT and AF which are important for recording / reproducing of the optical recording medium.
これらの点を考えると光反射層の反射率は高いほど好
ましいが、記録を考えると適当な透過率も必要であり、
両者の合理的な按分が必要となる。したがって、光反射
層はその反射率としては10〜85％、好ましくは20〜60％
が良好である。Considering these points, the higher the reflectivity of the light reflecting layer is, the more preferable it is.
A rational apportionment of both is required. Therefore, the light reflecting layer has a reflectance of 10 to 85%, preferably 20 to 60%.
Is good.
光反射層としては金、銀、銅などの金属の蒸着、無電
解メッキやこれら金属粒子をベヒクル中に分散して塗布
することによって構成される。The light reflecting layer is formed by depositing a metal such as gold, silver, or copper, by electroless plating, or by dispersing and applying these metal particles in a vehicle.
光反射層の膜厚は、光記録層を構成する光吸収層との
関連によって決定される反射率と、その加工法、すなわ
ち蒸着か無電解メッキ、分散媒の塗布のいずれを選択す
るかで決定され、その範囲は数拾Å〜数m/m、好ましく
は20Å〜1.0m/mが望ましい。The thickness of the light reflecting layer is determined by the reflectance determined by the relationship with the light absorbing layer constituting the optical recording layer and the processing method, that is, whether to select vapor deposition or electroless plating, or application of a dispersion medium. It is determined, and the range is several m to m / m, preferably 20 m to 1.0 m / m.
本発明において、光吸収層は照射された光エネルギー
を吸収し、熱エネルギーに変換するもので、その熱によ
り記録補助層が変形して、積層した反射層と記録ピット
を形成する。In the present invention, the light absorption layer absorbs the irradiated light energy and converts it into heat energy, and the heat deforms the recording auxiliary layer to form a laminated reflective layer and recording pits.
光吸収層は、光記録の際の記録ビームの波長に吸収特
性を持つ染・顔料などの、もしくはこれらの物質をバイ
ンダー中に分散することによって構成される。The light absorbing layer is formed by dispersing a dye or pigment having a characteristic of absorbing the wavelength of a recording beam at the time of optical recording in a binder.
光吸収層としてはTe,Bi,Sn,Sb,In等の低融点金属やそ
の合金及びAu,Ag,Cuなどの金属粒子、ジアニン系、スク
ワリウム系、フタロシアニン系、テトラデヒドロコリン
系、メチン系、ナフトキン系の染・顔料及びベンゼンジ
チオールニッケル錯体などの有機金属錯体の類、カーボ
ンブラックやニグロシン等の黒色染・顔料などが好まし
く使用出来る。As the light absorbing layer, low-melting point metals such as Te, Bi, Sn, Sb, In and alloys thereof and metal particles such as Au, Ag, Cu, etc., dianine, squalium, phthalocyanine, tetradehydrocholine, methine, Naphthoquin-based dyes and pigments, organic metal complexes such as benzenedithiol nickel complex, and black dyes and pigments such as carbon black and nigrosine can be preferably used.
また、光吸収層の膜厚は数拾Å〜数m/m、好ましくは2
00Å〜0.5m/mが望ましい。Further, the thickness of the light absorbing layer is a few m to m / m, preferably 2 m / m.
00Å to 0.5 m / m is desirable.
本発明において、記録補助層は光記録層中の光吸収層
で変換された熱エネルギーによつて変形し、その上の光
反射層に記録ピットを形成する。In the present invention, the recording auxiliary layer is deformed by the heat energy converted by the light absorbing layer in the optical recording layer, and forms recording pits on the light reflecting layer thereon.
記録補助層としては、ポリ塩化ビニル、ポリビニルア
ルコール、ポリ酢酸ビニル等のビニル系、ポリエチレ
ン、ポリプロピレン等のオレフィン系、ポリメチルメタ
クリレート、ポリメチルアクリレート等のアクリル系、
ポリエステル系、ポリアミド系、ポリスチレン系、セル
ローズ系、ポリカーボネート系、アイオノマー系等の樹
脂及びこれらの共重合体、混合物からなる有機高分子物
質やステアリン酸、パルミチン酸、フタル酸、コハク酸
などの有機カルボン酸及び固形パラフィンなどが好まし
く使用できる。As a recording auxiliary layer, polyvinyl chloride, polyvinyl alcohol, vinyl acetate such as polyvinyl acetate, olefins such as polyethylene and polypropylene, polymethyl methacrylate, acrylic such as polymethyl acrylate,
Polyester-based, polyamide-based, polystyrene-based, cellulose-based, polycarbonate-based, ionomer-based resins, and organic polymer substances such as copolymers and mixtures thereof, and organic carboxylic acids such as stearic acid, palmitic acid, phthalic acid, and succinic acid Acids and solid paraffin can be preferably used.
即ち、これらの物質としては400℃以下の低温、好ま
しくは200℃以下の低温で溶融、熱軟化などの熱変形を
起こすものである。That is, these substances cause thermal deformation such as melting and thermal softening at a low temperature of 400 ° C. or lower, preferably 200 ° C. or lower.
記録補助層の膜厚は、数拾Å〜数m/m、好ましくは700
Å〜1.8m/mが望ましい。The thickness of the recording auxiliary layer is from several m / m to several m / m, preferably 700 m / m.
Å ~ 1.8m / m is desirable.
また、記録補助層の成膜はバーコート、ロールコート
などの従来知られている塗布方法によって行うことがで
きる。The recording auxiliary layer can be formed by a conventionally known coating method such as bar coating and roll coating.
本発明において、光記録層は基板３の上に設けられる
が、その場合、光吸収層、記録補助層及び光反射層を順
次基板上に塗布あるいは蒸着して光記録層を設定して
も、ドライラミネート剤等の接着層を介して光記録層を
設けてもよい。In the present invention, the optical recording layer is provided on the substrate 3, in which case, even if the optical recording layer is set by applying or depositing a light absorbing layer, a recording auxiliary layer, and a light reflecting layer on the substrate sequentially. The optical recording layer may be provided via an adhesive layer such as a dry laminating agent.
又、光記録層が、例えば銀塩感材のようにあらかじめ
薄いフィルム等の上にコートされているものは、そのフ
ィルムごと接着剤を介して基板上に設定することができ
る。If the optical recording layer is coated on a thin film or the like in advance, such as a silver halide photographic material, the entire film can be set on a substrate via an adhesive.
本発明において、保護層４は、光記録層の機械的、化
学的、物理的な耐環境性を付与するもので、記録・再生
光に対し透明な材料で光記録層を被覆する。In the present invention, the protective layer 4 imparts mechanical, chemical and physical resistance to the environment of the optical recording layer, and covers the optical recording layer with a material transparent to recording / reproducing light.
例えば、ガラス板やセラミック板、ポリメチルメタア
クリレート、ポリカーボネート、塩化ビニル、ポリエチ
レンテレフタレート、ポリスチレン、CR−39、ポリメチ
ルペンテンなどのプラスチック板を必要に応じて接着層
を介して光記録層上に設ける。For example, a glass plate or a ceramic plate, a plastic plate such as polymethyl methacrylate, polycarbonate, vinyl chloride, polyethylene terephthalate, polystyrene, CR-39, or polymethylpentene is provided on the optical recording layer via an adhesive layer as necessary. .
別な例では、上述のプラスチック材料を直接光記録層
上にコートし、硬化せしめて保護層とする。この場合、
放射線硬化型の樹脂を使用することもできる。In another example, the plastic material described above is coated directly on the optical recording layer and cured to form a protective layer. in this case,
A radiation-curable resin can also be used.
保護層は光記録層の上に設けられるが、必ずしも密着
している必要はなく、空気もしくは不活性ガスを介して
設けられても良い。The protective layer is provided on the optical recording layer, but does not have to be in close contact with the optical recording layer, and may be provided via air or an inert gas.
保護層の外側の表面には、取扱いの上でキズやゴミの
付着を防ぐ為の耐磨耗処理、硬膜処理、防汚・防染処
理、帯電防止処理や耐久性向上を意図した、防湿処理、
防紫外線処理、防酸素透過処理（O2ガスバリヤー処理）
を必要に応じて施すことができる。On the outer surface of the protective layer, anti-abrasion treatment, hardening treatment, anti-fouling / dye-proofing treatment, anti-static treatment, anti-static treatment and anti-moisture treatment to prevent adhesion of scratches and dust during handling processing,
Anti-ultraviolet treatment, oxygen-proof transmission treatment (O 2 gas barrier treatment)
Can be applied as needed.
本発明の光記録媒体に、第２図に示すように光記録層
2aの側からレーザー光１を照射し情報の書き込みを行う
と、光記録層2aの光照射部には記録ピット５が形成され
る。この光照射により情報の書き込みが行われる際、先
ず、照射された光は光吸収層で熱に交換され、この熱に
よって記録補助層７を軟化、溶融し、その上の光反射層
を変形することによって、記録ピットの形状を整形、即
ちリムが生じない、サイズの安定したピットを作り、優
れた再生信号を与えることができる。The optical recording medium according to the present invention has an optical recording layer as shown in FIG.
When information is written by irradiating the laser beam 1 from the side 2a, recording pits 5 are formed in the light-irradiated portion of the optical recording layer 2a. When information is written by this light irradiation, first, the irradiated light is exchanged for heat in the light absorbing layer, and the heat softens and melts the recording auxiliary layer 7 to deform the light reflecting layer thereon. Thereby, the shape of the recording pit can be shaped, that is, a pit having a stable size without a rim can be formed, and an excellent reproduction signal can be given.
さらに、本発明の光記録媒体は光記録層が高感度であ
る為に光を熱エネルギーに変換するための高い吸収があ
り、また、コントラストの良い信号を検出する為の適当
な反射率を持ち、さらに優れた耐久性（少なくとも10年
以上の保存に耐えること）を有するものである。Furthermore, the optical recording medium of the present invention has a high absorption for converting light into heat energy due to the high sensitivity of the optical recording layer, and has an appropriate reflectance for detecting a signal with good contrast. In addition, it has excellent durability (withstands storage for at least 10 years or more).
［実施例］ 以下、実施例を示し本発明をさらに具体的に説明す
る。[Example] Hereinafter, the present invention will be described more specifically with reference to examples.
実施例１ カーボンブラック（日本コロンビアカーボン（株）
製）30重量部を、20重量％のポリビニルブチラールを含
有するエタノール溶液50重量部に配合して均一に混合
し、これを厚さ2.0mmのポリカーボネート基板上にバー
コーターで塗布して成膜し、膜厚1.0μｍの光吸収層を
設けた。Example 1 Carbon black (Nippon Columbia Carbon Co., Ltd.)
30 parts by weight) were mixed uniformly with 50 parts by weight of an ethanol solution containing 20% by weight of polyvinyl butyral, and the mixture was uniformly coated on a 2.0 mm-thick polycarbonate substrate with a bar coater to form a film. And a light absorbing layer having a thickness of 1.0 μm.
次に、厚さ10μｍのポリエチレン酢ビ共重合体フィル
ムを前記光吸収層の上に熱プレスにより成膜して記録補
助層を設けた。Next, a 10 μm-thick polyethylene vinyl acetate copolymer film was formed on the light absorbing layer by hot pressing to provide a recording auxiliary layer.
さらに、該記録補助層の上に金を真空蒸着し、膜厚50
Åの光反射層を設け、３層からなる光記録層を有する光
記録媒体を得た。Further, gold was vacuum-deposited on the recording auxiliary layer, and a film thickness of 50
An optical recording medium having an optical recording layer consisting of three layers was obtained by providing the light reflecting layer of Å.
この光記録層に波長830nmの半導体レーザーをビーム
径３μｍ、記録面上でのパワー3mWで書き込みを行った
結果、再生パワー0.1mWで再生信号で0.80以上のコント
ラストが得られた。As a result of writing a semiconductor laser having a wavelength of 830 nm on this optical recording layer with a beam diameter of 3 μm and a power of 3 mW on the recording surface, a reproduction signal of 0.10 mW provided a reproduction signal of 0.80 or more contrast.
このときの記録ピットを走査電子顕微鏡で観察した結
果、リムの生成はなく、そのピット径は3.0±0.3μｍの
非常に安定した大きさの記録ピットが得られた。As a result of observing the recording pit at this time by a scanning electron microscope, no rim was formed and a recording pit having a very stable size with a pit diameter of 3.0 ± 0.3 μm was obtained.
［発明の効果］ 以上説明したように、本発明の光記録方法及び光記録
媒体によれば、記録ピットの形状を常に一定にし、また
読み取りの際に、再生信号のエラー率を低減することが
できる等の利点がある。[Effects of the Invention] As described above, according to the optical recording method and the optical recording medium of the present invention, it is possible to always keep the shape of the recording pit constant and to reduce the error rate of the reproduced signal at the time of reading. There are advantages such as possible.
第１図は本発明の光記録媒体の代表的な構成例を示す断
面図、第２図は情報の書き込み状態を示す断面図および
第３図は従来の光記録媒体の記録ピットの形成状態を示
す説明図である。 １……レーザー光、2a,2b……光記録層 ３……基板、４……保護層 ５……記録ピット、６……光反射層 ７……記録補助層、８……光吸収層 ９……リムFIG. 1 is a cross-sectional view showing a typical configuration example of an optical recording medium of the present invention, FIG. 2 is a cross-sectional view showing a state of writing information, and FIG. FIG. DESCRIPTION OF SYMBOLS 1 ... Laser light, 2a, 2b ... Optical recording layer 3 ... Substrate 4, Protective layer 5 ... Recording pit, 6 ... Light reflecting layer 7 ... Recording auxiliary layer, 8 ... Light absorbing layer 9 ……rim
───────────────────────────────────────────────────── フロントページの続き (72)発明者 芳野 斉 東京都大田区下丸子３丁目30番２号 キ ヤノン株式会社内 (72)発明者 五十嵐 幸子 東京都大田区下丸子３丁目30番２号 キ ヤノン株式会社内 (72)発明者 加藤 清二郎 東京都大田区下丸子３丁目30番２号 キ ヤノン株式会社内 (56)参考文献 特開 昭61−20237（ＪＰ，Ａ) 特開 昭57−55540（ＪＰ，Ａ) ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Hitoshi Yoshino 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (72) Inventor Sachiko Igarashi 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon (72) Inventor Seijiro Kato 3-30-2 Shimomaruko, Ota-ku, Tokyo Canon Inc. (56) References JP-A-61-20237 (JP, A) JP-A-57-55540 (JP) , A)
Claims (2)
順番で積層された光記録層が、該光吸収層が基板と対向
するように該基板上に配置された光記録媒体に光ビーム
を照射して該記録補助層の光ビーム照射部を凹状に変形
せしめると共に該記録補助層の変形に沿って該光反射層
を凹状に変形せしめて該光反射層に記録ピットを形成し
て情報の記録を行うことを特徴とする光記録方法。An optical recording layer in which a light absorbing layer, a recording auxiliary layer, and a light reflecting layer are laminated in this order is formed on an optical recording medium disposed on a substrate such that the light absorbing layer faces the substrate. Irradiating a light beam to deform the light beam irradiating portion of the recording auxiliary layer into a concave shape, and deforming the light reflecting layer along the deformation of the recording auxiliary layer to form a recording pit in the light reflecting layer. An optical recording method characterized in that information is recorded by using an optical recording method.
順番で積層された光記録層が、該光吸収層が基板と対向
するように該基板上に配置され、且つ該光記録層に情報
が記録されている光記録媒体において、凹状に変形した
記録補助層と該記録補助層の変形に沿って凹状に変形し
た光反射層とによって形成されている記録ピットによっ
て該情報が該光記録層に記録されていることを特徴とす
る光記録媒体。2. An optical recording layer in which a light absorbing layer, a recording auxiliary layer, and a light reflecting layer are laminated in this order, is disposed on the substrate such that the light absorbing layer faces the substrate, and In an optical recording medium on which information is recorded in a layer, the information is formed by recording pits formed by a concavely deformed recording auxiliary layer and a light reflecting layer deformed concavely along the deformation of the recording auxiliary layer. An optical recording medium recorded on an optical recording layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61089952A JP2591939B2 (en) | 1986-04-21 | 1986-04-21 | Optical recording method and optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61089952A JP2591939B2 (en) | 1986-04-21 | 1986-04-21 | Optical recording method and optical recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62246783A JPS62246783A (en) | 1987-10-27 |
| JP2591939B2 true JP2591939B2 (en) | 1997-03-19 |
Family
ID=13985033
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61089952A Expired - Fee Related JP2591939B2 (en) | 1986-04-21 | 1986-04-21 | Optical recording method and optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2591939B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6933032B2 (en) | 2003-04-15 | 2005-08-23 | Ricoh Company, Ltd. | Write-once-read-many optical recording media and process for recording and reproducing information on the media |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2488711B1 (en) * | 1980-08-13 | 1985-06-28 | Thomson Csf | THERMO-OPTICAL INFORMATION RECORDING PROCESS AND INFORMATION MEDIUM FOR CARRYING OUT SAID METHOD |
| JPS6120237A (en) * | 1984-07-06 | 1986-01-29 | Canon Inc | Optical information recording medium |
-
1986
- 1986-04-21 JP JP61089952A patent/JP2591939B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6933032B2 (en) | 2003-04-15 | 2005-08-23 | Ricoh Company, Ltd. | Write-once-read-many optical recording media and process for recording and reproducing information on the media |
| US7413788B2 (en) | 2003-04-15 | 2008-08-19 | Ricoh Company, Ltd. | Write-once-read-many optical recording media and process for recording and reproducing information on the media |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62246783A (en) | 1987-10-27 |
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