JPS6326466B2 - - Google Patents
Info
- Publication number
- JPS6326466B2 JPS6326466B2 JP55169360A JP16936080A JPS6326466B2 JP S6326466 B2 JPS6326466 B2 JP S6326466B2 JP 55169360 A JP55169360 A JP 55169360A JP 16936080 A JP16936080 A JP 16936080A JP S6326466 B2 JPS6326466 B2 JP S6326466B2
- Authority
- JP
- Japan
- Prior art keywords
- laser beam
- layer
- recording
- recording medium
- heat
- 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
Links
- 239000010410 layer Substances 0.000 claims description 48
- 239000000758 substrate Substances 0.000 claims description 12
- 239000011241 protective layer Substances 0.000 claims description 8
- 230000031700 light absorption Effects 0.000 claims description 5
- 239000000975 dye Substances 0.000 description 10
- 230000003287 optical effect Effects 0.000 description 9
- 230000035945 sensitivity Effects 0.000 description 7
- 238000000859 sublimation Methods 0.000 description 7
- 230000008022 sublimation Effects 0.000 description 7
- 238000010521 absorption reaction Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000002425 crystallisation Methods 0.000 description 5
- 230000008025 crystallization Effects 0.000 description 5
- 239000004065 semiconductor Substances 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 239000005387 chalcogenide glass Substances 0.000 description 2
- 238000011109 contamination Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000010408 film Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000049 pigment Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 238000004528 spin coating Methods 0.000 description 2
- 238000001771 vacuum deposition Methods 0.000 description 2
- 238000007738 vacuum evaporation Methods 0.000 description 2
- RZVAJINKPMORJF-UHFFFAOYSA-N Acetaminophen Chemical compound CC(=O)NC1=CC=C(O)C=C1 RZVAJINKPMORJF-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011230 binding agent Substances 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007850 fluorescent dye Substances 0.000 description 1
- 229910052738 indium Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000013081 microcrystal Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000005297 pyrex Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- UJMBCXLDXJUMFB-UHFFFAOYSA-K trisodium;5-oxo-1-(4-sulfonatophenyl)-4-[(4-sulfonatophenyl)diazenyl]-4h-pyrazole-3-carboxylate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)C1=NN(C=2C=CC(=CC=2)S([O-])(=O)=O)C(=O)C1N=NC1=CC=C(S([O-])(=O)=O)C=C1 UJMBCXLDXJUMFB-UHFFFAOYSA-K 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
-
- 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
-
- 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
- G11B2007/25705—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 inorganic materials
- G11B2007/25715—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 inorganic materials containing oxygen
-
- 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
- G11B7/00454—Recording involving phase-change effects
-
- 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
- G11B7/2578—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 inorganic materials
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
本発明は基板上に形成された薄膜層にレーザー
ビームを照射して、その反射率或は透過率を変化
させることにより光学的信号を記録再生するレー
ザービーム記録媒体の改良に関するものである。Detailed Description of the Invention The present invention relates to a laser beam recording medium that records and reproduces optical signals by irradiating a thin film layer formed on a substrate with a laser beam and changing its reflectance or transmittance. It is about improvement.
一般にレーザービームによる熱的効果を記録に
利用するヒートモード記録方式は、経年変化がな
く実働時間で追加記録ができる等の特徴を有して
いる。 Generally, the heat mode recording method, which utilizes the thermal effect of a laser beam for recording, has features such as no deterioration over time and the ability to make additional recordings during actual working hours.
而して従来この種レーザービーム記録媒体とし
ては、基板上に染料及びバインダーにて記録層を
形成したもの（米国特許第1117419号）や金属薄
膜、金属酸化物、カルコゲナイドガラス層等を記
録層として用いる媒体例えばM.L.Vevene
“Electron，Ion and Laser Beam Technology”
第11回シンポジウム記録（1969），Electronics誌
（1968）318P50，特開昭50−46317号公報に記載
されている。 Conventionally, this type of laser beam recording medium has a recording layer formed on a substrate using a dye and a binder (U.S. Pat. No. 1,117,419), a metal thin film, a metal oxide, a chalcogenide glass layer, etc. as a recording layer. Media used e.g. MLVevene
“Electron, Ion and Laser Beam Technology”
It is described in the 11th Symposium Record (1969), Electronics magazine (1968) 318P50, and Japanese Patent Application Laid-open No. 46317/1983.
しかしこれらのレーザービーム記録媒体におい
ては記録に高いエネルギーを必要とし且つArレ
ーザー等の高出力レーザー光源及び大型の変調偏
光器等を使用しなければならなかつた。従つてこ
のような欠点を改善するために半導体レーザーを
使用したレーザービーム記録系及び媒体が検討さ
れているが、レーザー出力波長が近赤外部（〜
830nm）であると共に半導体レーザーの出力が小
さいため感度が低く使用が困難であつた。 However, these laser beam recording media require high energy for recording and require the use of a high-power laser light source such as an Ar laser, a large modulation polarizer, and the like. Therefore, in order to improve these drawbacks, laser beam recording systems and media using semiconductor lasers are being considered, but the laser output wavelength is in the near-infrared range (~
830 nm) and the output of the semiconductor laser was low, making it difficult to use due to its low sensitivity.
又記録形式として媒体の昇華或は蒸発によりう
るため飛散した物質による光学系の汚染、媒体表
面の汚染が生じこれを防止するために透明な保護
層で覆つたり、透明基板の裏側からレーザービー
ムを照射する方式も考慮されてきた。 In addition, as a recording format, contamination of the optical system by scattered substances due to sublimation or evaporation of the medium and contamination of the medium surface may be avoided by covering with a transparent protective layer or by applying a laser beam from the back side of the transparent substrate. irradiation methods have also been considered.
然し前者の方法では保護層によつて昇華、蒸発
の妨害による感度低度はまぬがれず又後者の方法
では光学的精度を保つた媒体構成に困難な点があ
り十分なものとはいえないものであつた。 However, the former method does not avoid low sensitivity due to interference with sublimation and evaporation due to the protective layer, and the latter method cannot be said to be sufficient because it is difficult to construct a medium that maintains optical precision. It was hot.
本発明はかかる欠点を改善せんとし鋭意研究を
行つた結果、光学的コントラストをうるために結
晶化の原理を用い、光学感度を向上せしめると共
にレーザービーム記録層の形状が変化しない記録
層を用いたレーザービーム記録媒体を提供せんと
するものであり、その目的とするところは高感度
にして且つ製造容易なレーザービーム記録媒体を
得んとするものである。即ち本発明は
(1) レーザービームにて記録再生を行うレーザー
ビーム記録媒体において、基板上に有機染料か
らなり熱によつて結晶化する非晶質層と光吸収
層とを形成せしめることを特徴とするものであ
る。 As a result of intensive research aimed at improving these drawbacks, the present invention uses the principle of crystallization to obtain optical contrast, improves optical sensitivity, and uses a recording layer in which the shape of the laser beam recording layer does not change. It is an object of the present invention to provide a laser beam recording medium, and the object thereof is to obtain a laser beam recording medium that is highly sensitive and easy to manufacture. That is, the present invention is characterized in that (1) a laser beam recording medium in which recording and reproduction is performed using a laser beam, in which an amorphous layer made of an organic dye and crystallized by heat and a light absorption layer are formed on a substrate; That is.
(2) レーザービームにて記録再生を行うレーザー
ビーム記録媒体において、基板上に反射層を設
け、その上部に有機染料からなり熱によつて結
晶化する非晶質層と光吸収層とを重ね、更に保
護層を設けたことを特徴とするものである。(2) In a laser beam recording medium that performs recording and reproduction using a laser beam, a reflective layer is provided on the substrate, and an amorphous layer made of an organic dye that crystallizes by heat and a light absorption layer are layered on top of the reflective layer. , further comprising a protective layer.
なお上記においてAg，Alの反射層を設ける理
由は記録のコントラストを高め且つ無反射構造を
構成せしめるためである。又保護層を設ける理由
はキズや塵埃等から記録面を保護するためであ
る。 In the above, the reason for providing a reflective layer of Ag or Al is to increase the contrast of recording and to form a non-reflective structure. The reason for providing the protective layer is to protect the recording surface from scratches, dust, etc.
本発明の構成を図面に基づき詳細に説明する。 The configuration of the present invention will be explained in detail based on the drawings.
第１図は透過形レーザービーム記録媒体を示す
ものであり、１１は基板例えばセラミツクス板、
ガラス、透明プラスチツク板、１２は熱によつて
結晶化をおこす非晶質層例えば昇華性染料が使用
されレーザービームを吸収する必要はなく染料の
吸収波長にかかわらず広範囲の材料を自由に選択
できる。１３はレーザービーム吸収層例えばTe，
Bi，In及びその酸化物やカルコゲナイドガラス
等の如く照射されるレーザービームを吸収する物
質にて形成される。この層を厚さ100〜300Åに適
宜選択することによつて半導体レーザ及びそれ以
外のレーザ光にもレーザービーム記録媒体として
適用しうる。又１４は記録部を示す。 FIG. 1 shows a transmission type laser beam recording medium, in which reference numeral 11 indicates a substrate such as a ceramic plate;
Glass, transparent plastic plate, 12 is an amorphous layer that crystallizes with heat, for example, a sublimable dye is used, and there is no need to absorb the laser beam, so a wide range of materials can be freely selected regardless of the absorption wavelength of the dye. . 13 is a laser beam absorption layer such as Te,
It is formed of a material that absorbs the irradiated laser beam, such as Bi, In, oxides thereof, and chalcogenide glass. By appropriately selecting the thickness of this layer to be 100 to 300 Å, it can be applied to semiconductor lasers and other laser beams as a laser beam recording medium. Further, 14 indicates a recording section.
この媒体上にレーザービームを照射すると、ビ
ームのエネルギーはレーザービーム吸収層に吸収
され熱に変化する。この熱によつて、予め熱によ
り結晶化する非晶質層は結晶化をおこし非晶質層
には微結晶が生成し結晶粒界により非晶質層の透
明性は失なわれる。 When this medium is irradiated with a laser beam, the energy of the beam is absorbed by the laser beam absorption layer and converted into heat. Due to this heat, the amorphous layer that was previously crystallized by heat is crystallized, microcrystals are generated in the amorphous layer, and the transparency of the amorphous layer is lost due to grain boundaries.
又染料による非晶質層の結晶化温度は用いる染
料によつて異なるが大部分のものは80〜120℃あ
り、他の記録媒体に記録の際必要な温度に比較し
て極めて低い例えばTeを昇華するには500℃が必
要である。 In addition, the crystallization temperature of the amorphous layer formed by the dye varies depending on the dye used, but most of them are between 80 and 120 degrees Celsius, which is extremely low compared to the temperature required for recording on other recording media. 500℃ is required for sublimation.
又染料は有機物であるため熱伝導率は極めて小
さく吸収層の熱は基板等に逃げることなく、レー
ザービーム吸収層と非晶質層に有効に加わるもの
である。 Furthermore, since the dye is an organic substance, its thermal conductivity is extremely low, and the heat of the absorption layer is effectively applied to the laser beam absorption layer and the amorphous layer without escaping to the substrate or the like.
然しながら非晶質層は熱によつて結晶化するま
では照射するレーザービームを散乱したり或は吸
収する性質をもつてはならない。通常このような
色素や染料による厚さ0.3〜0.7μm薄膜を作製する
には、溶媒からのスピンコート法を用いることが
多い。しかしスピンコート法では溶媒が蒸発する
間に溶質である色素、染料が微結晶化をおこし、
上述の如き熱によつて結晶化する非晶質層を作製
することができない。 However, the amorphous layer must not have the property of scattering or absorbing the irradiating laser beam until it is crystallized by heat. Normally, a spin coating method from a solvent is often used to produce a thin film of 0.3 to 0.7 μm thick using pigments or dyes. However, in the spin coating method, while the solvent evaporates, the solute pigments and dyes become microcrystallized.
It is not possible to produce an amorphous layer that is crystallized by heat as described above.
本発明はレーザービーム記録媒体は、この熱に
よつて結晶化する非晶質層を簡単に製造しうるた
め、材料の蒸発や昇華を用いてこれを実現するも
のである。又同時に反射層、光吸収層を含めて同
一の作業系内で作製しうる利点を有する。 Since the laser beam recording medium of the present invention can easily produce an amorphous layer that is crystallized by this heat, this is achieved by using evaporation or sublimation of the material. It also has the advantage that both the reflective layer and the light absorbing layer can be manufactured in the same working system.
また熱による結晶化は発熱反応であつて、一旦
反応温度に達すると昇華或は蒸発の如く潜熱を必
要とすることなく結晶化が進行するものである。 Further, thermal crystallization is an exothermic reaction, and once the reaction temperature is reached, crystallization proceeds without the need for latent heat like sublimation or evaporation.
これによつて記録媒体は極めて低いエネルギー
によつて光学的変化を生じさせることが可能とな
る。 This allows the recording medium to produce optical changes with extremely low energy.
又第２図はレーザービーム書き込みによつて生
じた光学的コントラストを透過モードで読み出し
た例であり、２１は記録前の透過光量、２２は記
録によつて減少した透過光量である。 FIG. 2 shows an example in which the optical contrast produced by laser beam writing is read out in transmission mode, where 21 is the amount of transmitted light before recording, and 22 is the amount of transmitted light reduced by recording.
又第３図は反射形レーザービーム記録媒体を示
すものであり、３１は基板、３２は反射層例えば
Alの蒸着層、３３は熱によつて結晶化する非晶
質層、３４はレーザービーム吸収層、３５は保護
層例えばポリメチルメタクリレート、ポリカーボ
ネート等の透明な樹脂により形成される。３６は
記録された部分を示す。 FIG. 3 shows a reflective laser beam recording medium, where 31 is a substrate and 32 is a reflective layer, for example.
33 is an amorphous layer crystallized by heat; 34 is a laser beam absorbing layer; and 35 is a protective layer made of a transparent resin such as polymethyl methacrylate or polycarbonate. 36 indicates the recorded portion.
この構造において３３の非晶質層の膜厚を制御
することによつて干渉を利用して無反射構造のも
のを作製することができる。 In this structure, by controlling the thickness of the amorphous layer 33, a non-reflection structure can be manufactured using interference.
次に本発明の実施例について説明する。 Next, examples of the present invention will be described.
実施例 (1)
パイレツクスガラス板上にケイ光染料C.I.
Fuluorescent Brightning Agent 87（Kayaphcr
Ｓ日本化薬社商品名）を真空蒸着により厚さ
0.5μmの透明被膜を形成した。Example (1) Fluorescent dye CI on Pyrex glass plate
Fluorescent Brightening Agent 87 (Kayaphcr
S Nippon Kayaku Co., Ltd. product name) by vacuum deposition.
A transparent film of 0.5 μm was formed.
この上部にTeを200Åの厚さに蒸着して本発明
レーザービーム記録媒体とした。 On top of this, Te was vapor-deposited to a thickness of 200 Å to obtain a laser beam recording medium of the present invention.
而して本発明媒体に830nmの半導体レーザ光の
パルス（1.2×2.0μm径、パワー6mW）を照射し
たところ60n secで記録することが出来た。これ
はエネルギー密度に換算して20mJ／cm2の感度で
あつた。 When the medium of the present invention was irradiated with a pulse of 830 nm semiconductor laser light (1.2×2.0 μm diameter, power 6 mW), it was possible to record in 60 n sec. This had a sensitivity of 20 mJ/cm 2 in terms of energy density.
実施例 (2)
ポリメタクリル酸メチルアクリレートの基板上
にAlを3000Å蒸着して鏡面を作製し、その上に
C.I.Disperse Yellow5（スミカロンイエロ5GE住
友化学商品名）を真空蒸着により厚さ0.55μmに
形成した。更にTeを100Å蒸着したところ光の干
渉により830nmでの反射率を５％以下にすること
が出来た。Example (2) A mirror surface was created by depositing Al to a thickness of 3000 Å on a polymethyl methacrylate substrate, and then
CIDisperse Yellow 5 (Sumikaron Yellow 5GE, trade name of Sumitomo Chemical) was formed to a thickness of 0.55 μm by vacuum deposition. Furthermore, when Te was deposited to a thickness of 100 Å, the reflectance at 830 nm could be reduced to 5% or less due to light interference.
その上部にポリメタクリル酸メチルを厚さ
0.5μmにスピンコートして本発明媒体とした。 Thick polymethyl methacrylate on top of it
It was spin-coated to a thickness of 0.5 μm to obtain a medium of the present invention.
而して本発明媒体に830nmの半導体レーザ光の
パルス（1.2×2.0μm径、パワー60mW）を照射し
たところ＞20n secで記録することが出来た。こ
れはエネルギー密度に換算して約6mJ／cm2の感度
であつた。 When the medium of the present invention was irradiated with a pulse of 830 nm semiconductor laser light (1.2×2.0 μm diameter, power 60 mW), recording was possible in >20 n sec. This was a sensitivity of approximately 6 mJ/cm 2 in terms of energy density.
以上詳述した如く本発明レーザービーム記録媒
体は極めて高感度にしてレーザービームの記録が
可能である。これは熱によつて結晶化する非晶質
層の変化温度が従来の記録媒体に比して低温であ
り且つ結晶化反応自体が発熱反応であること並に
非晶質層の熱伝導率が非常に小さいためである。 As detailed above, the laser beam recording medium of the present invention allows laser beam recording with extremely high sensitivity. This is because the change temperature of the amorphous layer that crystallizes due to heat is lower than that of conventional recording media, the crystallization reaction itself is an exothermic reaction, and the thermal conductivity of the amorphous layer is low. This is because it is extremely small.
又本発明レーザービーム記録媒体は凹凸等の記
録部、未記録部の形状変化がなく、媒体自体の性
質変化による記録形態であるため最外層に保護層
を設けたとしても昇華形レーザービーム記録媒体
のように昇華が保護膜によつて妨げられ感度が低
下するようなことがない。更に記録によつて蒸
発、揮散する物質がなく未記録部がそれらによつ
て汚染されＳ／Ｎ比を悪化させることがない等顕
著な効果を有する。 In addition, the laser beam recording medium of the present invention does not change the shape of the recorded portion or unrecorded portion such as unevenness, and the recording form is due to changes in the properties of the medium itself, so even if a protective layer is provided as the outermost layer, it is not a sublimation type laser beam recording medium. There is no possibility that the sublimation is blocked by a protective film and the sensitivity is reduced. Furthermore, there are no substances that evaporate or volatilize during recording, so that the unrecorded area is not contaminated by them and the S/N ratio is not deteriorated, and other remarkable effects are achieved.
又本発明記録媒体においては、非晶質層を真空
蒸着等の手段により設けることが出来ると共に反
射層及び光吸収層についても真空蒸着等により形
成しうるから同一系内において連続的に作業を行
うことが出来る。従つてその製造方法が極めて簡
単である。 Furthermore, in the recording medium of the present invention, the amorphous layer can be provided by means such as vacuum evaporation, and the reflective layer and light absorption layer can also be formed by vacuum evaporation, etc., so that the operations can be performed continuously in the same system. I can do it. Therefore, its manufacturing method is extremely simple.
第１図及び第３図は本発明レーザービーム記録
媒体の１例を示す概略説明図、第２図は第１図の
記録媒体の光学的コントラストを示す図、第４図
は第３図の記録媒体の光学的コントラストを示す
図である。
１１，３１……基板、１２，３３……熱によつ
て結晶化する非晶質層、３２……反射層、１３，
３４……レーザービーム吸収層、２１，４１……
未記録部、２２，４２……記録部、３５……保護
層。
1 and 3 are schematic explanatory diagrams showing an example of the laser beam recording medium of the present invention, FIG. 2 is a diagram showing the optical contrast of the recording medium of FIG. 1, and FIG. 4 is a diagram of the recording medium of FIG. 3. FIG. 2 is a diagram showing the optical contrast of a medium. 11, 31... Substrate, 12, 33... Amorphous layer crystallized by heat, 32... Reflective layer, 13,
34... Laser beam absorption layer, 21, 41...
Unrecorded portion, 22, 42... Recorded portion, 35... Protective layer.
Claims (1)
ビーム記録媒体において、基板上に有機染料から
なり熱によつて結晶化する非晶質層と光吸収層と
を形成せしめることを特徴とするレーザービーム
記録媒体。 ２ レーザービームにて記録再生を行うレーザー
ビーム記録媒体において、基板上に反射層を設
け、その上部に有機染料からなり熱によつて結晶
化する非晶質層と光吸収層とを重ね、更に保護層
を設けたことを特徴とするレーザービーム記録媒
体。[Claims] 1. A laser beam recording medium that performs recording and reproduction using a laser beam, characterized in that an amorphous layer made of an organic dye and crystallized by heat and a light absorption layer are formed on a substrate. laser beam recording medium. 2. In a laser beam recording medium that performs recording and reproduction using a laser beam, a reflective layer is provided on the substrate, an amorphous layer made of an organic dye that crystallizes by heat and a light absorption layer are layered on top of the reflective layer, and A laser beam recording medium characterized by being provided with a protective layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55169360A JPS5794943A (en) | 1980-12-01 | 1980-12-01 | Laser beam recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55169360A JPS5794943A (en) | 1980-12-01 | 1980-12-01 | Laser beam recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5794943A JPS5794943A (en) | 1982-06-12 |
| JPS6326466B2 true JPS6326466B2 (en) | 1988-05-30 |
Family
ID=15885129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55169360A Granted JPS5794943A (en) | 1980-12-01 | 1980-12-01 | Laser beam recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5794943A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61227238A (en) * | 1985-03-30 | 1986-10-09 | Fujitsu Ltd | Medium and method for optical information recording |
| JPH0397638A (en) * | 1989-09-07 | 1991-04-23 | Hoya Corp | Multicomponent glass containing dispersed fine particle and production thereof |
| US5162054A (en) * | 1989-09-07 | 1992-11-10 | Hoya Corporation | Process for producing multi-component glass doped with microparticles |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52138145A (en) * | 1976-05-14 | 1977-11-18 | Hitachi Ltd | Optical recording device |
| JPS53133039A (en) * | 1977-04-26 | 1978-11-20 | Canon Inc | Recording method |
-
1980
- 1980-12-01 JP JP55169360A patent/JPS5794943A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52138145A (en) * | 1976-05-14 | 1977-11-18 | Hitachi Ltd | Optical recording device |
| JPS53133039A (en) * | 1977-04-26 | 1978-11-20 | Canon Inc | Recording method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5794943A (en) | 1982-06-12 |
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