JPS62267192A - Optical information recording medium - Google Patents
Optical information recording mediumInfo
- Publication number
- JPS62267192A JPS62267192A JP61110587A JP11058786A JPS62267192A JP S62267192 A JPS62267192 A JP S62267192A JP 61110587 A JP61110587 A JP 61110587A JP 11058786 A JP11058786 A JP 11058786A JP S62267192 A JPS62267192 A JP S62267192A
- Authority
- JP
- Japan
- Prior art keywords
- optical information
- recording layer
- recording medium
- information recording
- 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.)
- Pending
Links
- 230000003287 optical effect Effects 0.000 title claims description 33
- 239000000758 substrate Substances 0.000 claims abstract description 22
- UYTPUPDQBNUYGX-UHFFFAOYSA-N guanine Chemical compound O=C1NC(N)=NC2=C1N=CN2 UYTPUPDQBNUYGX-UHFFFAOYSA-N 0.000 claims abstract description 16
- 150000002894 organic compounds Chemical class 0.000 claims abstract description 13
- 239000000463 material Substances 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 claims abstract description 9
- 150000003212 purines Chemical class 0.000 claims abstract description 9
- QUNWUDVFRNGTCO-UHFFFAOYSA-N 1,7-dimethylxanthine Chemical compound N1C(=O)N(C)C(=O)C2=C1N=CN2C QUNWUDVFRNGTCO-UHFFFAOYSA-N 0.000 claims abstract description 8
- LRFVTYWOQMYALW-UHFFFAOYSA-N 9H-xanthine Chemical compound O=C1NC(=O)NC2=C1NC=N2 LRFVTYWOQMYALW-UHFFFAOYSA-N 0.000 claims abstract description 8
- NYHBQMYGNKIUIF-UUOKFMHZSA-N Guanosine Chemical compound C1=NC=2C(=O)NC(N)=NC=2N1[C@@H]1O[C@H](CO)[C@@H](O)[C@H]1O NYHBQMYGNKIUIF-UUOKFMHZSA-N 0.000 claims abstract description 8
- RYYVLZVUVIJVGH-UHFFFAOYSA-N caffeine Chemical compound CN1C(=O)N(C)C(=O)C2=C1N=CN2C RYYVLZVUVIJVGH-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000002844 melting Methods 0.000 claims abstract description 8
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 7
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 7
- 239000004593 Epoxy Substances 0.000 claims abstract description 6
- 239000004417 polycarbonate Substances 0.000 claims abstract description 6
- 229910052714 tellurium Inorganic materials 0.000 claims abstract description 6
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 claims abstract description 6
- GFFGJBXGBJISGV-UHFFFAOYSA-N Adenine Chemical compound NC1=NC=NC2=C1N=CN2 GFFGJBXGBJISGV-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229930024421 Adenine Natural products 0.000 claims abstract description 4
- MIKUYHXYGGJMLM-GIMIYPNGSA-N Crotonoside Natural products C1=NC2=C(N)NC(=O)N=C2N1[C@H]1O[C@@H](CO)[C@H](O)[C@@H]1O MIKUYHXYGGJMLM-GIMIYPNGSA-N 0.000 claims abstract description 4
- NYHBQMYGNKIUIF-UHFFFAOYSA-N D-guanosine Natural products C1=2NC(N)=NC(=O)C=2N=CN1C1OC(CO)C(O)C1O NYHBQMYGNKIUIF-UHFFFAOYSA-N 0.000 claims abstract description 4
- LEHOTFFKMJEONL-UHFFFAOYSA-N Uric Acid Chemical compound N1C(=O)NC(=O)C2=C1NC(=O)N2 LEHOTFFKMJEONL-UHFFFAOYSA-N 0.000 claims abstract description 4
- TVWHNULVHGKJHS-UHFFFAOYSA-N Uric acid Natural products N1C(=O)NC(=O)C2NC(=O)NC21 TVWHNULVHGKJHS-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229960000643 adenine Drugs 0.000 claims abstract description 4
- 239000000956 alloy Substances 0.000 claims abstract description 4
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 4
- 229940029575 guanosine Drugs 0.000 claims abstract description 4
- 229940116269 uric acid Drugs 0.000 claims abstract description 4
- 238000004544 sputter deposition Methods 0.000 claims description 8
- 230000008018 melting Effects 0.000 claims description 7
- 229920000515 polycarbonate Polymers 0.000 claims description 5
- 238000006116 polymerization reaction Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 238000007738 vacuum evaporation Methods 0.000 claims description 3
- 229940075420 xanthine Drugs 0.000 claims description 3
- 239000010409 thin film Substances 0.000 claims description 2
- -1 thiobrosine Chemical compound 0.000 claims 2
- 230000005855 radiation Effects 0.000 abstract description 15
- 238000001704 evaporation Methods 0.000 abstract description 7
- 230000008020 evaporation Effects 0.000 abstract description 7
- 230000035945 sensitivity Effects 0.000 abstract description 7
- 230000008022 sublimation Effects 0.000 abstract description 6
- 238000000859 sublimation Methods 0.000 abstract description 6
- 239000011521 glass Substances 0.000 abstract description 5
- LPHGQDQBBGAPDZ-UHFFFAOYSA-N Isocaffeine Natural products CN1C(=O)N(C)C(=O)C2=C1N(C)C=N2 LPHGQDQBBGAPDZ-UHFFFAOYSA-N 0.000 abstract description 3
- 229960001948 caffeine Drugs 0.000 abstract description 3
- VJEONQKOZGKCAK-UHFFFAOYSA-N caffeine Natural products CN1C(=O)N(C)C(=O)C2=C1C=CN2C VJEONQKOZGKCAK-UHFFFAOYSA-N 0.000 abstract description 3
- 238000000354 decomposition reaction Methods 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- YAPQBXQYLJRXSA-UHFFFAOYSA-N theobromine Chemical compound CN1C(=O)NC(=O)C2=C1N=CN2C YAPQBXQYLJRXSA-UHFFFAOYSA-N 0.000 abstract 2
- ZFXYFBGIUFBOJW-UHFFFAOYSA-N theophylline Chemical compound O=C1N(C)C(=O)N(C)C2=C1NC=N2 ZFXYFBGIUFBOJW-UHFFFAOYSA-N 0.000 abstract 2
- 230000004927 fusion Effects 0.000 abstract 1
- 239000012994 photoredox catalyst Substances 0.000 abstract 1
- 229960004559 theobromine Drugs 0.000 abstract 1
- 229960000278 theophylline Drugs 0.000 abstract 1
- 239000010408 film Substances 0.000 description 3
- 230000001678 irradiating effect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 229940083251 peripheral vasodilators purine derivative Drugs 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007740 vapor deposition 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
- G11B7/243—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
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
- G11B7/2531—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising glass
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/253—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates
- G11B7/2533—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of substrates comprising resins
-
- 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
- G11B7/257—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 layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers
- G11B7/2572—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 layers having properties involved in recording or reproduction, e.g. optical interference layers or sensitising layers or dielectric layers, which are protecting the recording layers consisting essentially of organic materials
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、例えばコンピュータ用光デイスクメモリや光
カードなど、放射線ビームを照射することによって情報
の追記が可能な光情報記録媒体に係り、特に、放射線ビ
ームの照射部にピットを開孔する記録層を備えたものに
関する。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an optical information recording medium, such as an optical disk memory for a computer or an optical card, on which information can be added by irradiating with a radiation beam, and in particular, , relates to a device including a recording layer in which pits are formed in a portion irradiated with a radiation beam.
従来より、第３図に示すように、ガラス、ポリメチルメ
タクリレート（ＰＭＭＡ）、ポリカーボネート（ｐｃ）
、エポキシなどの透明な硬質物質によって形成された基
板１１の片面に低融点金属から成る記録層１２が形成さ
れた光情報記録媒体が知られている。この種の光情報記
録媒体では、情報信号によって変調された放射線ビーム
を上記基板１１側から上記記録層１２に照射すると、当
該放射線ビームの照射部が局部的に加熱され、記録層１
２に融解、蒸発、収縮等の熱的変形が生じ、情報信号が
ピット（開孔）列の形で記録される。Conventionally, as shown in Figure 3, glass, polymethyl methacrylate (PMMA), polycarbonate (PC)
An optical information recording medium is known in which a recording layer 12 made of a low melting point metal is formed on one side of a substrate 11 made of a transparent hard material such as epoxy. In this type of optical information recording medium, when the recording layer 12 is irradiated with a radiation beam modulated by an information signal from the substrate 11 side, the irradiated area of the radiation beam is locally heated, and the recording layer 12 is heated.
2 undergoes thermal deformation such as melting, evaporation, and contraction, and an information signal is recorded in the form of a row of pits (openings).
しかしながら、この種の記録材料から成る記録層１２を
直接基板ｌｌ上に形成すると記録感度が低く、■記録用
光源に大パワーのものを必要とする。ＱＩ放射線ビーム
の照射部に対する基板１１の移送速度を高速化すること
ができず記録重度の向上及びデータ転送の高速化を図る
ことができないといった問題がある。However, if the recording layer 12 made of this type of recording material is formed directly on the substrate 11, the recording sensitivity will be low, and (2) a high power recording light source will be required. There is a problem in that it is not possible to increase the transport speed of the substrate 11 to the QI radiation beam irradiation part, and it is not possible to improve the recording density and speed up data transfer.
そこで、従来より、基板１１と記録層１２の間に記録層
１２の記録感度を改善するための中間層が形成された光
情報記録媒体が種々提案されている（例えば、特公昭６
０−２３０３７、特公昭６Ｏ−２３９９８）。Therefore, various optical information recording media have been proposed in which an intermediate layer is formed between the substrate 11 and the recording layer 12 in order to improve the recording sensitivity of the recording layer 12 (for example,
0-23037, Special Publication Sho 6O-23998).
ところで、この種の光情報記録媒体に情報を記録する光
情報記録媒体駆動装置、例えば光デイスク駆動装置にお
いては、コスト低減及び装置小型化の見地から記録膜面
上における放射線ビームの・パワーを５〜６ｍＷ以下に
据え置いたまま、データ転送速度の高速化のため光情報
ｉｉ′！録ディスクの回転数を１８００〜２４０Ｏｒｐ
ｍ程度に高速化することが検討されている。By the way, in an optical information recording medium drive device that records information on this type of optical information recording medium, such as an optical disk drive device, the power of the radiation beam on the recording film surface is reduced to 5. ~6mW or less, optical information ii'! to increase data transfer speed! Set the rotation speed of the recording disc to 1800 to 240 Orp.
It is being considered to increase the speed to about m.
然るに、本願発明者らの研究によると、従来提案されて
いる光情報記録媒体はいまだ充分な記録感度を有するに
至っておらず、上記の記録条件の下で情報の記録を行う
とピットが充分な大きさに開設されず、エラーレートの
増加や再生信号強度の低下によるＳ／Ｎ比の低下といっ
た問題が生ずる。However, according to the research conducted by the inventors of the present invention, the optical information recording media that have been proposed so far do not yet have sufficient recording sensitivity, and when information is recorded under the above recording conditions, there are not enough pits. This results in problems such as an increase in the error rate and a decrease in the S/N ratio due to a decrease in the reproduction signal strength.
本発明は記録層の熱的変形を促進し記録層の記録感度を
向上するため、基板と記録層との間に、プリン誘導体を
核にもち、上記記録層に融解、分解、蒸発、昇華などの
熱的変形を起して情報を記録するに必要な温度よりも低
い温度で融解、分解。In order to promote thermal deformation of the recording layer and improve the recording sensitivity of the recording layer, the present invention has a purine derivative as a core between the substrate and the recording layer, and causes the recording layer to undergo melting, decomposition, evaporation, sublimation, etc. melts and decomposes at temperatures lower than those required to cause thermal deformation and record information.
蒸発、昇華などの熱的変形を生ずる有機化合物から成る
光透過性の中間層を設けたことを特徴とするものである
。 ′
〔作用〕
上記の物質をもって中間層を形成した場合、なぜ記録層
の記録感度が向上するかについては今だ充分に分析がな
されていない。しかしながら、プリン誘導体を核にもつ
有機化合物は融解、分解。It is characterized by the provision of a light-transmissive intermediate layer made of an organic compound that undergoes thermal deformation such as evaporation or sublimation. [Operation] It has not yet been sufficiently analyzed why the recording sensitivity of the recording layer is improved when the intermediate layer is formed using the above-mentioned substances. However, organic compounds with purine derivatives at their core melt and decompose.
蒸発、昇華などの熱的変形を生ずる際にガスを発生する
ため、記録層が融解、分解、蒸発、昇華などの熱的変形
する以前に上記の有機化合物から成る中間層が熱的変形
すると、そのガス圧によって加熱された記録層の平衡状
態が破られてピットの開孔が促進されるものと推定され
る。Gas is generated when thermal deformation such as evaporation or sublimation occurs, so if the intermediate layer made of the above organic compound is thermally deformed before the recording layer undergoes thermal deformation such as melting, decomposition, evaporation or sublimation, It is presumed that the equilibrium state of the heated recording layer is broken by the gas pressure, promoting the formation of pits.
まず、本発明の概略を第１図に基づいて説明する。第１
図は本発明にかかる光情報記録媒体の概略を示・す断面
図であって、１は基板、２は中間層、３は記録層を示し
ている。First, an outline of the present invention will be explained based on FIG. 1st
The figure is a cross-sectional view schematically showing an optical information recording medium according to the present invention, in which 1 is a substrate, 2 is an intermediate layer, and 3 is a recording layer.
基板１は、ガラスやＰＭＭＡ、ＰＣ、エポキシといった
透明な硬質物質によって形成される。光情報記録媒体が
光ディスクである場合、ディスク基板の片面にはトラッ
キング情報に対応するプリグループやアドレス信号に対
応するプリピット等の凹凸パターンが転写されるが、か
かる凹凸パターンの転写方法どしては、ガラスについて
は２Ｐ法、ＰＭＭＡやＰＣについては射出成形法、エポ
キシについては２Ｐ法や注型法が適する。The substrate 1 is made of a transparent hard material such as glass, PMMA, PC, or epoxy. When the optical information recording medium is an optical disc, a concavo-convex pattern such as a pre-group corresponding to tracking information and a pre-pit corresponding to an address signal is transferred onto one side of the disc substrate. The 2P method is suitable for glass, the injection molding method is suitable for PMMA and PC, and the 2P method and casting method are suitable for epoxy.
また、上記中間層２は、プリン誘導体を核にもつ有機化
合物であって、以下に詳述する記録層３に融解、分解、
蒸発、昇華などの熱的変形を起して情報を記録するに必
要な温度よりも低い温度で融解２分解、蒸発、昇華など
の熱的変形を生ずる物質から形成される。例えば、基板
がＰＭＭＡまたはＰＣまたはエポキシから形成され、記
録層がテルルを主成分とする低融点合金にて形成された
光情報記録媒体においては、グアニン、グアノシン、ア
デニン、チオブロシン、キサンチン、尿酸、カフェイン
、チオフイリン、パラキサンチンから選択された少なく
とも１種類の物質を核にもつ有機化合物を用いることが
できる。この中間層２の形成手段としては、真空蒸着法
、スパッタ法、電子ビーム法、プラズマ重合法など、公
知に属する任意の薄膜形成手段を用いることができる。The intermediate layer 2 is an organic compound having a purine derivative as its core, and is melted, decomposed, and
It is formed from a material that undergoes thermal deformation such as evaporation, sublimation, etc. at a temperature lower than the temperature required to record information. For example, in an optical information recording medium in which the substrate is made of PMMA, PC, or epoxy, and the recording layer is made of a low melting point alloy containing tellurium as a main component, guanine, guanosine, adenine, thiobrosine, xanthine, uric acid, caffeine, etc. An organic compound having at least one substance selected from in, thiophyllin, and paraxanthine at its core can be used. As a means for forming this intermediate layer 2, any known thin film forming means such as vacuum evaporation, sputtering, electron beam method, plasma polymerization, etc. can be used.
上記記録層３は、放射線ビームの照射部にピットを透孔
の形で形成する、例えばテルルまたはテルルを主成分と
する合金などの低融点金属をもって形成される。この記
録層３の形成手段としては、真空蒸着法、スパッタ法、
電子ビーム法、プラズマ重合法など、公知に属する任意
のｗＩ膜形成手段を用いることができる。The recording layer 3 is formed of a low melting point metal such as tellurium or an alloy mainly composed of tellurium, which forms pits in the form of through holes in the radiation beam irradiated areas. The recording layer 3 can be formed by vacuum evaporation, sputtering,
Any known wI film forming method can be used, such as an electron beam method or a plasma polymerization method.
以下１本発明の具体的実施例を示し、本発明の効果に言
及する。A specific example of the present invention will be shown below, and the effects of the present invention will be discussed.
第１実施例
ガラス製基板の片面にＵＶ樹脂層を展伸し、２Ｐ法によ
ってトラッキング情報に対応するプリグループ及びアド
レス信号に対応するプリピットを転写したレプリカ基板
上に、抵抗加熱蒸着法によってグアニン（Ｃｓ Ｈｓ
０Ｈｚ）の中間層を約２００人の厚さに形成し、さらに
、この中間層上に高周波スパッタリング法によりＴｅ−
８ｓ系の記録層を約３００人の厚さに形成した。First Example A UV resin layer is spread on one side of a glass substrate, and guanine (guanine Cs Hs
0 Hz) is formed to a thickness of about 200 mm, and then Te-3 is deposited on this intermediate layer by high frequency sputtering.
An 8s type recording layer was formed to a thickness of about 300 mm.
第２実施例
上記第１実施例と同様のレプリカ基板上に、高周波スパ
ッタリング法によってグアニンの中間層を約２００人の
厚さに形成し、さらに、この中間層上に高周波スパッタ
リング法によりＴ ｅ −Ｓ ｅ系の記録層を約３００
人の厚さに形成した。Second Example On a replica substrate similar to that of the first example, an intermediate layer of guanine was formed to a thickness of approximately 200 nm by high frequency sputtering, and furthermore, T e - Approximately 300 Se-based recording layers
Formed to the thickness of a person.
第３実施例 。Third embodiment.
上記第１実施例及び第２実施例と同様のレプリカ基板Ｆ
に、抵抗加熱蒸着法によってグアノシン（Ｃ＋ｏ Ｈ１
３０５８ｓ ） （１）中間層を約２０ＯＡ（７）厚さ
に形成し、さらに、この中間層上に高周波スパッタリン
グ法によりＴ ｅ −Ｓ ｅ系の記録層を約３００人の
厚さに形成した。Replica substrate F similar to the above first and second embodiments
Then, guanosine (C+o H1
3058s) (1) An intermediate layer was formed to a thickness of about 20 OA (7), and a T e -Se recording layer was further formed on this intermediate layer to a thickness of about 300 OA (7 OA) by high frequency sputtering.
第４実施例
上記第１実施例乃至第３実施例と同様のレプリカ基板上
に、抵抗加熱蒸着法によってアデニン（Ｃ５ＨｓＮ ｓ
）の中間層を約２００人の厚さに形成し、さらに、こ
の中間層上に高周波スパッタリング法によりＴ ｅ−８
ｅ系の記録層を約３ｆ）Ｃ１−′ｌ−
人の厚さに形成した。Fourth Example Adenine (C5HsN s
) is formed to a thickness of approximately 200 mm, and then a T e-8
An e-based recording layer was formed to a thickness of approximately 3 f)C1-'l-.
第５実施例
上記第１実施例乃至第４実施例と同様のレプリカ基板上
に、高周波スパッタリング法によりテオブロシ’／ （
Ｃ７Ｈａ ０２ Ｈ４）（７）中間層を約２００人の厚
さに形成し、さらに、この中間層上に高周波スパッタリ
ング法によりＴ ｅ −Ｓ ｅ系の記録層を約３００λ
の厚さに形成した。Fifth Example Theobrosi'/(
C7Ha 02 H4) (7) An intermediate layer is formed to a thickness of approximately 200 nm, and a T e -S e recording layer is further formed on this intermediate layer to a thickness of approximately 300 λ by high frequency sputtering.
It was formed to a thickness of .
第２図に、上記した第１実施例乃至第５実施例の光情報
記録媒体に放射線ビームを照射することによって開設さ
れるピットの変調度と、中間層２゛が形成されていない
従来の光情報記録媒体に放射線ビームを照射することに
よって開設されるピットの変調度の比較を示す。ただし
、記録用放射線ビームとしては波長が８３０ｎｍのレー
ザビームを使用し、光情報記録媒体を１２０Ｏｒｐｍに
て回転駆動した。このグラフにおいて、横軸は記録用レ
ーザパワーを示し、縦軸は変調度を示す。ここで、ピッ
トの変調度とは、ピットの大きさ、即ちピットの開き易
さを示す度数であって、ピットが開設されていない部分
の反射率をＡ、所定のレーザパワーを照射することによ
って開設されたピットの部分の反射率をＸとした場合。FIG. 2 shows the modulation degree of pits created by irradiating the optical information recording media of the first to fifth embodiments with a radiation beam, and the conventional optical information recording medium in which no intermediate layer 2 is formed. A comparison of the degree of modulation of pits created by irradiating an information recording medium with a radiation beam is shown. However, a laser beam with a wavelength of 830 nm was used as the recording radiation beam, and the optical information recording medium was rotated at 120 rpm. In this graph, the horizontal axis shows recording laser power, and the vertical axis shows modulation degree. Here, the degree of modulation of a pit is the size of the pit, that is, the frequency that indicates the ease with which the pit opens. When the reflectance of the opened pit part is set as X.
（Ａ−Ｘ）／ （Ａ）をもって表わされるものをいう。(A-X)/ (A).
この図から明らかなように、中間層２が形成された本発
明の光情報記録媒体は、いずれも中間層２が開設されて
いない従来品に対して一定パワーのレーザビームに対す
る変調度が大きく、ピットが開設され易いことが判る。As is clear from this figure, the optical information recording medium of the present invention in which the intermediate layer 2 is formed has a higher degree of modulation with respect to a laser beam of constant power than the conventional products in which the intermediate layer 2 is not provided. It can be seen that pits are easy to open.
本発明品のうちでは、チオブロシンの中間層を形成した
第５実施例の光情報記録媒体が最も優れ、以下、アデニ
ンの中間層を形成したもの（第４実施例）、グアノシン
の中間層を形成したもの（第３実施例）、グアニンを抵
抗加熱蒸着した中間層を形成したもの（第２実施例）、
グアニンを高周波スパッタリングした中間層を形成した
もの（第３実施例）の順で、ピットが開き易い。また、
各レーザパワーに対する変調度の差は、低パワーのレー
ザビームに対するほど大きく、通常この種の光情報記録
ディスクを駆動する駆動装置に搭載される６ｍＷ（記録
膜面におけるパワー）以下の放射線ビームに対して特に
有効であることが判った。Among the products of the present invention, the optical information recording medium of Example 5 in which an intermediate layer of thiobrosine was formed was the most excellent. (Embodiment 3), an intermediate layer formed by resistance heating vapor deposition of guanine (Example 2),
The pits were more likely to open in the case where the intermediate layer was formed by high-frequency sputtering of guanine (third example). Also,
The difference in the degree of modulation for each laser power is larger for lower power laser beams, and for radiation beams of 6 mW or less (power at the recording film surface) that are normally installed in drive devices that drive this type of optical information recording disk. It was found to be particularly effective.
尚、本発明の要旨は、基板と記録層の間にプリン誘導体
を核にもつ有機化合物であって記録層よりも熱的変形温
度が低い物質から成る光透過性の中間層を設けた点に存
するのであって、中間層を構成する具体的な材料が上記
実施例に掲げたものに限定されるものではない。例えば
、上記第１実施例乃至第５実施例に掲げたもののほか５
キサンチン（Ｃｓ ８４０ｚ Ｎａ ）、尿酸（Ｃ５Ｈ
ａ Ｎａ Ｏａ ）、
カフェイン（Ｃ日Ｈ１゜０２ Ｎ ｚ ’＞ 、チオフ
イリン（Ｃｙ Ｈｓ ０２ Ｈ４）、パラキサンチン（
Ｃ７Ｈｅ Ｎａ ０２）、等のプリン誘導体を核にもつ
有機化合物により中間層を形成することもできる。The gist of the present invention is that a light-transmitting intermediate layer made of an organic compound having a purine derivative as its core and having a lower thermal deformation temperature than the recording layer is provided between the substrate and the recording layer. However, the specific materials constituting the intermediate layer are not limited to those listed in the above embodiments. For example, in addition to those listed in the first to fifth embodiments above, five
Xanthine (Cs 840z Na), uric acid (C5H
a Na Oa ), caffeine (Cy H1゜02 N z '>, thiophyllin (Cy Hs 02 H4), paraxanthine (
The intermediate layer can also be formed using an organic compound having a purine derivative as its core, such as C7He Na 02).
以上説明したように１本発明の光情報記録媒体は、基板
と記録層の間にプリン誘導体を核にもつ有機化合物であ
って、記録層よりも熱的変形温度が低い物質から成る光
透過性の中間層を設けたので、記録層の放射線ビーム照
射部の熱的変形が促進され、基板上に記録層を直接形成
したものに比べて記録感度を格段に向上することができ
る。従って、放射線ビームのパワーを増大することなく
。As explained above, (1) the optical information recording medium of the present invention has a light-transmitting material between the substrate and the recording layer, which is made of an organic compound having a purine derivative as its core, and which has a thermal deformation temperature lower than that of the recording layer. Since the intermediate layer is provided, thermal deformation of the radiation beam irradiated portion of the recording layer is promoted, and the recording sensitivity can be significantly improved compared to the case where the recording layer is directly formed on the substrate. Thus, without increasing the power of the radiation beam.
データ転送の高速化の要請に対処することができる。It is possible to meet the demand for faster data transfer.
第１図は本発明にかかる光情報記録ディスクの概略を示
す断面図、第２図は本発明にかかる光情報記録媒体及び
中間層が形成されていない従来の光情報記録媒体の変調
度の比較を示すグラフ、第３図は従来知られている光情
報記録ディスクの一例を示す要部断面図である。
ｌ：ディスク基板、２：中間層、３：記録層第１図
３記ＦＶ量
第３図
第２図
（’／
記鈑パウー（ｍＷ）FIG. 1 is a cross-sectional view schematically showing the optical information recording disk according to the present invention, and FIG. 2 is a comparison of the modulation degree of the optical information recording medium according to the present invention and a conventional optical information recording medium in which no intermediate layer is formed. FIG. 3 is a sectional view of a main part of an example of a conventionally known optical information recording disk. 1: Disc substrate, 2: Intermediate layer, 3: Recording layer
Claims (3)
録層を形成して成る追記型の光情報記録媒体において、
上記基板と上記記録層との間に、プリン誘導体を核にも
ち、上記記録層に情報を記録するに必要な温度よりも低
い温度で熱的変形を生ずる有機化合物から成る光透過性
の中間層を設けたことを特徴とする光情報記録媒体。(1) In a write-once optical information recording medium in which a recording layer made of a heat mode recording material is formed on one side of a substrate,
A light-transmissive intermediate layer between the substrate and the recording layer is made of an organic compound having a purine derivative as its core and which undergoes thermal deformation at a temperature lower than the temperature required to record information in the recording layer. An optical information recording medium characterized by being provided with.
ボネートまたはエポキシから形成され、記録層がテルル
を主成分とする低融点合金にて形成された特許請求の範
囲第１項記載の光情報記録媒体において、中間層がグア
ニン、グアノシン、アデニン、チオブロシン、キサンチ
ン、尿酸、カフエイン、チオフイリン、パラキサンチン
から選択された少なくとも１種類の物質を核にもつ有機
化合物から形成されていることを特徴とする光情報記録
媒体。(2) The optical information recording medium according to claim 1, wherein the substrate is made of polymethyl methacrylate, polycarbonate, or epoxy, and the recording layer is made of a low melting point alloy containing tellurium as a main component. An optical information recording medium characterized in that the medium is formed of an organic compound having at least one substance selected from guanine, guanosine, adenine, thiobrosine, xanthine, uric acid, caffein, thiophylline, and paraxanthine as its core.
録媒体において、中間層が真空蒸着法、スパッタ法、プ
ラズマ重合法から選択された薄膜形成手段によつて形成
されていることを特徴とする光情報記録媒体。(3) In the optical information recording medium according to claims 1 and 2, the intermediate layer is formed by a thin film forming method selected from vacuum evaporation, sputtering, and plasma polymerization. An optical information recording medium characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61110587A JPS62267192A (en) | 1986-05-16 | 1986-05-16 | Optical information recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61110587A JPS62267192A (en) | 1986-05-16 | 1986-05-16 | Optical information recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62267192A true JPS62267192A (en) | 1987-11-19 |
Family
ID=14539633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61110587A Pending JPS62267192A (en) | 1986-05-16 | 1986-05-16 | Optical information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62267192A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0385341A2 (en) * | 1989-03-03 | 1990-09-05 | TDK Corporation | Optical recording medium |
| US5431804A (en) * | 1990-10-09 | 1995-07-11 | Diamond Technologies Company | Nickel-cobalt-boron alloy deposited on a substrate |
-
1986
- 1986-05-16 JP JP61110587A patent/JPS62267192A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0385341A2 (en) * | 1989-03-03 | 1990-09-05 | TDK Corporation | Optical recording medium |
| US5161150A (en) * | 1989-03-03 | 1992-11-03 | Tdk Corporation | Optical recording medium |
| US5431804A (en) * | 1990-10-09 | 1995-07-11 | Diamond Technologies Company | Nickel-cobalt-boron alloy deposited on a substrate |
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