JPS63847B2 - - Google Patents
Info
- Publication number
- JPS63847B2 JPS63847B2 JP51121066A JP12106676A JPS63847B2 JP S63847 B2 JPS63847 B2 JP S63847B2 JP 51121066 A JP51121066 A JP 51121066A JP 12106676 A JP12106676 A JP 12106676A JP S63847 B2 JPS63847 B2 JP S63847B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- recording
- recording layer
- reflective layer
- metal
- 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
- 229910052751 metal Inorganic materials 0.000 claims description 31
- 239000002184 metal Substances 0.000 claims description 31
- 239000000956 alloy Substances 0.000 claims description 3
- 229910045601 alloy Inorganic materials 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 56
- 239000000463 material Substances 0.000 description 5
- 229910052755 nonmetal Inorganic materials 0.000 description 5
- 230000035945 sensitivity Effects 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 150000002739 metals Chemical class 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 229910052752 metalloid Inorganic materials 0.000 description 3
- 150000002738 metalloids Chemical class 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N argon Substances [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 229910052786 argon Inorganic materials 0.000 description 2
- 239000003989 dielectric material Substances 0.000 description 2
- 229910052737 gold Inorganic materials 0.000 description 2
- 229910052738 indium Inorganic materials 0.000 description 2
- 229910052749 magnesium Inorganic materials 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 2
- 229910052724 xenon Inorganic materials 0.000 description 2
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004793 Polystyrene Substances 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 229910010413 TiO 2 Inorganic materials 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 229910052797 bismuth Inorganic materials 0.000 description 1
- JCXGWMGPZLAOME-UHFFFAOYSA-N bismuth atom Chemical compound [Bi] JCXGWMGPZLAOME-UHFFFAOYSA-N 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- CPBQJMYROZQQJC-UHFFFAOYSA-N helium neon Chemical compound [He].[Ne] CPBQJMYROZQQJC-UHFFFAOYSA-N 0.000 description 1
- 229910052745 lead Inorganic materials 0.000 description 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 1
- 229910052753 mercury Inorganic materials 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920002223 polystyrene Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 229910052718 tin Inorganic materials 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910052725 zinc Inorganic materials 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
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
- G11B7/241—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material
- G11B7/252—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers
- G11B7/258—Record carriers characterised by shape, structure or physical properties, or by the selection of the material characterised by the selection of the material of layers other than recording layers of reflective layers
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Optical Recording Or Reproduction (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
- Non-Silver Salt Photosensitive Materials And Non-Silver Salt Photography (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
本発明は、エネルギービームを照射したときに
記録層の物性定数が変化する記録媒体の改良に関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a recording medium in which the physical constants of the recording layer change when irradiated with an energy beam.
従来、強力な幅射エネルギー、例えば、レーザ
ー光、キセノンランプ、水銀ランプ、アーク灯等
を照射して、透過率、屈折率、反射率、帯磁率、
誘電率等の物性定数を変化させて記録する記録媒
体は、極めて高解像力、高コントラストの画像を
形成し得ること、室内光に感光せず暗室操作が不
要であること、あとからの情報の付加が可能であ
ること、計算機の出力や伝送されてくる時系列信
号等の電気信号の記録に適していること等の利点
を有し、マイクロ画像、COM、マイクロフアク
シミリ、写真植字用原板等に応用されている。 Conventionally, transmittance, refractive index, reflectance, magnetic susceptibility,
Recording media that record by changing physical constants such as dielectric constant can form images with extremely high resolution and high contrast, are not sensitive to room light and do not require darkroom operation, and can be used to add information later. It has the advantages of being suitable for recording electrical signals such as computer output and transmitted time series signals, and is suitable for recording micro images, COM, micro facsimile, phototypesetting original plates, etc. It is applied.
しかしながらこの記録媒体を用いる場合には、
記録媒体の感度が大きな要因となる。つまり従来
の記録媒体は第１図に示すように支持体１上に記
録層２を設けた記録媒体にレーザー光などのエネ
ルギービーム４を照射し、記録層２の光透過率な
どの物性定数を変化させて記録していたが、この
とき照射されたエネルギービームのうちの一部４
は吸収されずに透過してしまうので、その分、高
出力のレーザーやフラツシユランプ等が必要であ
つた。 However, when using this recording medium,
The sensitivity of the recording medium is a major factor. In other words, in a conventional recording medium, as shown in FIG. 1, an energy beam 4 such as a laser beam is irradiated onto a recording medium in which a recording layer 2 is provided on a support 1, and the physical property constants such as the light transmittance of the recording layer 2 are determined. Some of the energy beams irradiated at this time were
Since the light passes through without being absorbed, a high-output laser, flash lamp, etc. is required.
しかし、いずれも高出力になると不安定、不安
全、使用中の水冷の必要性、装置価格の高騰等、
実用上の問題が大きかつた。 However, when they reach high output, they become unstable, unsafe, require water cooling during use, and soar the cost of the equipment.
There were major practical problems.
本発明は、従来のものに比して弱い出力のエネ
ルギービームでも十分な記録ができる記録媒体を
提供することを目的とする。 An object of the present invention is to provide a recording medium that can perform sufficient recording even with an energy beam having a weaker output than conventional ones.
本発明による記録媒体は、照射されたエネルギ
ービームの一部を吸収して物性定数が変化する金
属、半金属又はこれらの合金から成る記録層と、
少なくとも50％以上の反射率を有し前記記録層に
吸収されずに透過して来たエネルギービームを反
射して再び記録層に入射させる金属反射層と、前
記記録層と金属反射層との間に設けられた前記金
属反射層より熱伝導率の低い非金属層とを有する
ことを特徴とする。 The recording medium according to the present invention includes a recording layer made of a metal, a metalloid, or an alloy thereof, whose physical constants change by absorbing a part of the irradiated energy beam;
A metal reflective layer that has a reflectance of at least 50% and reflects the energy beam that has passed through the recording layer without being absorbed and makes it enter the recording layer again, and a space between the recording layer and the metal reflective layer. and a non-metal layer having a lower thermal conductivity than the metal reflective layer provided on the metal reflective layer.
以下本発明を図面を参照しながら説明する。 The present invention will be explained below with reference to the drawings.
第２図は、本発明に係る記録媒体の構成を示す
断面図である。図中、１は金属または非金属の基
板で、通常は、ガラス、ポリエステル、トリアセ
テート等を適用する。３は強力は幅射エネルギー
ビームで、例えばレーザー光キセノンランプ、水
銀ランプ、アーク灯等である。２は照射されたエ
ネルギービーム３を吸収して物性定数が変化する
記録層である。該記録層は従来ヒートモード記録
層として知られており、金属、半金属またはこれ
らの合金を媒体物質として蒸着やスパツタリング
により単層若しくは積層構成される。ここで、金
属としてはAl、Cu、Zn、Cd、Co、Pb、Mg、
In、RhおよびSnが、また半金属としてはBi、Ge
およびSiが挙げられる。５は照射されたエネルギ
ービーム３に対して高い反射率を有する金属反射
層である。この反射層は記録層に吸収されずに透
過して来たエネルギービームを反射して再び記録
層に入射させるものであるから、反射率は高いほ
ど効果があり、少くとも50％以上、好ましくは80
％以上の反射率が良い。この反射層に用いる金属
としては、Al、Ag、Au、In、Cu、Cr、Mg等が
あり、こられの金属を蒸着させて金属反射層にす
るときは、少くとも0.04μ以上、好ましくは0.1μ
以上の厚さにすると十分な反射率が得られる。 FIG. 2 is a sectional view showing the structure of a recording medium according to the present invention. In the figure, 1 is a metal or non-metal substrate, and glass, polyester, triacetate, etc. are usually used. 3 is a powerful beam of radiant energy, such as a laser beam, xenon lamp, mercury lamp, or arc lamp. Reference numeral 2 denotes a recording layer whose physical constants change by absorbing the irradiated energy beam 3. The recording layer is conventionally known as a heat mode recording layer, and is constructed as a single layer or a laminated layer by vapor deposition or sputtering using a metal, a metalloid, or an alloy thereof as a medium material. Here, the metals include Al, Cu, Zn, Cd, Co, Pb, Mg,
In, Rh and Sn, and as metalloids Bi, Ge
and Si. Reference numeral 5 denotes a metal reflective layer having a high reflectance for the irradiated energy beam 3. This reflective layer reflects the energy beam that has passed through the recording layer without being absorbed and makes it enter the recording layer again, so the higher the reflectance, the more effective it is, preferably at least 50% or more. 80
% or more reflectance is good. Metals used for this reflective layer include Al, Ag, Au, In, Cu, Cr, Mg, etc. When these metals are vapor-deposited to form a metal reflective layer, the metal reflective layer should be at least 0.04μ or more, preferably 0.1μ
A sufficient reflectance can be obtained by setting the thickness to the above value.
第２図に示した構成においては、照射されたエ
ネルギービーム３の一部は記録層の記録媒体物質
に吸収され、該記録媒体物質を溶融除去、蒸発、
変形させるなどして照射部の物性定数を変化させ
る。このとき記録層に吸収されなかつたエネルギ
ービームは金属反射層５に達するが、ここで反射
されて反射エネルギービーム６となつて再び記録
層に入射する。 In the configuration shown in FIG. 2, a part of the irradiated energy beam 3 is absorbed by the recording medium material of the recording layer, and the recording medium material is melted away, evaporated, and
The physical property constants of the irradiated part are changed by deforming it, etc. At this time, the energy beam that is not absorbed by the recording layer reaches the metal reflective layer 5, but is reflected there and becomes a reflected energy beam 6, which enters the recording layer again.
このように、第２図に示した記録媒体において
は、従来は一度記録層を透過してしまつたエネル
ギービームはそのまま無駄になつていたものを、
金属反射層５につて再び記録層２と相互作用を行
うようにして、照射光３の利用率の向上を計り、
感度向上を実現したものである。また、８は照射
されたエネルギービーム３に対して透明な非金属
層、７は照射光３に対する反射防止膜である。 In this way, in the recording medium shown in Fig. 2, energy beams that previously passed through the recording layer were wasted, but instead of being wasted.
The metal reflective layer 5 interacts with the recording layer 2 again to improve the utilization rate of the irradiated light 3,
This has resulted in improved sensitivity. Further, 8 is a non-metal layer transparent to the irradiated energy beam 3, and 7 is an antireflection film to the irradiated light 3.
すなわち、金属反射層５として、Al、Au、Cu
等の金属を用いた場合に、これらの金属は熱伝導
率が高い。従つて照射光３を吸収して、その熱エ
ネルギーによつて記録媒体物質を蒸発および／ま
たは溶融除去させる方法にあつては、前記金属反
射層５によつて熱伝導損失が起こる。そこで熱伝
導率の低いポリエステル、ポリエチレン、ポリス
チレン、アクリル、トリアセテート等の樹脂、
SiO、SiO2等の非金属層を設けたものである。 That is, as the metal reflective layer 5, Al, Au, Cu
These metals have high thermal conductivity. Therefore, in the method of absorbing the irradiation light 3 and using its thermal energy to evaporate and/or melt and remove the recording medium material, heat conduction loss occurs due to the metal reflective layer 5. Therefore, resins with low thermal conductivity such as polyester, polyethylene, polystyrene, acrylic, and triacetate,
A non-metallic layer such as SiO or SiO 2 is provided.
反射防止膜７には、レンズ等でも使用されてい
るMgO、ZrO2、Al2O2、MgF2等の誘電体物質等
が適用できる。 The antireflection film 7 can be made of dielectric materials such as MgO, ZrO 2 , Al 2 O 2 , MgF 2 , etc., which are also used in lenses.
このように第２図に示した構成にあつては、記
録層からの熱伝導損失並びに記録層表面における
反射防止が成されるので、さらに感度が改良され
る。 In this way, in the configuration shown in FIG. 2, heat conduction loss from the recording layer and reflection prevention on the surface of the recording layer are prevented, so that the sensitivity is further improved.
さらに他の構成として、金属反射層の反射特性
を限定したものについて説明する。つまり、記録
層の記録媒体物質が溶融除去および／または蒸発
除去されて光透過率の変化として記録されたスラ
イドやマイクロフイルムのような場合には、読み
出しにあたつてエネルギービームの金属反射層が
可視光透過性であるのが好ましい。 Furthermore, as another configuration, one in which the reflective characteristics of the metal reflective layer are limited will be described. In other words, in the case of slides or microfilms where the recording medium material in the recording layer is melted and/or evaporated and recorded as a change in light transmittance, the metal reflective layer of the energy beam is Preferably, it is transparent to visible light.
例えば金属反射層の反射特性が、0.8μ以上の波
長の光に対してのみ高い反射率を示すものであれ
ば、YAGレーザーや半導体レーザーのレーザー
光に対しては反射するが可視光は透過するので可
視光で読み出すことができる。また0.4880μ前後
の狭い波長領域のみに高い反射率を示し、他の領
域では、高い透過率を有するように選択反射特性
を反射層に持たせれば、照射光３として、アルゴ
ンイオンレーザーを用いることができる。あるい
はまた、0.6328μの狭い波長領域のみに高い反射
率を持たせ、他の領域では、高い透過率を有する
選択反射特性を持たせれば、照射光３としてヘリ
ウム・ネオンレーザーを用いることができる。 For example, if the reflective property of a metal reflective layer is such that it only shows a high reflectance for light with a wavelength of 0.8μ or more, it will reflect laser light from YAG lasers and semiconductor lasers, but it will transmit visible light. Therefore, it can be read out using visible light. In addition, if the reflective layer has selective reflection characteristics so that it shows high reflectance only in a narrow wavelength region of around 0.4880μ and has high transmittance in other regions, it is possible to use an argon ion laser as the irradiation light 3. Can be done. Alternatively, a helium-neon laser can be used as the irradiation light 3 by providing a high reflectance only in a narrow wavelength region of 0.6328μ and providing selective reflection characteristics with high transmittance in other regions.
このように選択反射特性を持たせる為には、
ZnS，TiO2，CeO2，ZrO2，MgF2等の誘電体物
質を積層すると良い。 In order to have selective reflection characteristics like this,
It is preferable to laminate dielectric materials such as ZnS, TiO 2 , CeO 2 , ZrO 2 and MgF 2 .
以上、詳述した如く、本発明の記録媒体の層構
成によれば、従来透過していたエネルギービーム
を反射させる為の金属反射層を設けたことによつ
て感度を向上させることができ、しかも可視光に
よる読み出しに悪影響を及ぼさない。また、非金
属層を設けることにより、金属反射層における熱
伝導損失を防止して一層感度を向上させることが
できたものである。 As described in detail above, according to the layer structure of the recording medium of the present invention, sensitivity can be improved by providing a metal reflective layer for reflecting energy beams that were transmitted conventionally. Does not adversely affect readout using visible light. Further, by providing a non-metallic layer, heat conduction loss in the metallic reflective layer can be prevented and sensitivity can be further improved.
次に実施例について説明する。 Next, an example will be described.
実施例
第２図の構成において、支持体１は、透明な厚
さ100ミクロンのポリエステルとし、その上にエ
ネルギービームの金属反射層としてAlを厚さ
1000Å蒸着し、その上に、非金属層８としてアク
リル樹脂を厚さ0.5ミクロンコートし、記録層２
としてビスマスを厚さ600Å蒸着し、反射防止層
７として、GeSを厚さ700Å蒸着して記録媒体を
作成した。Alは可視・赤外波長の光線に対して
95％以上の反射率を有する。Example In the configuration shown in Fig. 2, the support 1 is made of transparent polyester with a thickness of 100 microns, and on top of that, Al is coated with a thickness of 100 μm as a metal reflective layer for the energy beam.
1000 Å is deposited, and on top of that, an acrylic resin is coated with a thickness of 0.5 microns as a non-metal layer 8, and a recording layer 2 is formed.
As the anti-reflection layer 7, bismuth was deposited to a thickness of 600 Å, and GeS was deposited to a thickness of 700 Å to form a recording medium. Al is sensitive to visible and infrared wavelength light.
Has a reflectance of over 95%.
この記録媒体にアルゴンイオンレーザー光を照
射した処、金属反射層５のない場合に比べて７割
以下のパワーで、記録層２に略同一面積の穴をあ
けることができ、また、同じ記録媒体にキセノン
フラツシユランプを照射した処、金属反射層５の
ない場合に比べて、６割以下のパワーで、記録層
２に略同一面積の穴をあけることができた。 When this recording medium is irradiated with argon ion laser light, holes with approximately the same area can be made in the recording layer 2 with less than 70% of the power compared to the case without the metal reflective layer 5, and the same recording medium When irradiated with a xenon flash lamp, holes with approximately the same area could be made in the recording layer 2 with 60% less power than in the case without the metal reflective layer 5.
第１図は、従来の記録媒体の構成を示す断面
図。第２図は、本発明に係る記録媒体の構成例を
示す断面図。
１……支持体、２……記録層、３……エネルギ
ービーム、５……金属反射層、８……非金属層。
FIG. 1 is a sectional view showing the structure of a conventional recording medium. FIG. 2 is a sectional view showing an example of the configuration of a recording medium according to the present invention. DESCRIPTION OF SYMBOLS 1...Support, 2...Recording layer, 3...Energy beam, 5...Metal reflective layer, 8...Nonmetal layer.
Claims (1)
て物性定数が変化する金属、半金属又はこれらの
合金から成る記録層と、少なくとも50％以上の反
射率を有し前記記録層に吸収されずに透過して来
たエネルギービームを反射して再び記録層に入射
させる金属反射層と、前記記録層と金属反射層と
の間に設けられ前記金属反射層より熱伝導率の低
い非金属層とを有することを特徴とする記録媒
体。1. A recording layer made of a metal, semi-metal, or an alloy thereof that absorbs a part of the irradiated energy beam and whose physical constants change, and a recording layer that has a reflectance of at least 50% and that is not absorbed by the recording layer. A metal reflective layer that reflects the transmitted energy beam and makes it enter the recording layer again, and a non-metallic layer that is provided between the recording layer and the metal reflective layer and has a lower thermal conductivity than the metal reflective layer. A recording medium characterized by having:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12106676A JPS5346019A (en) | 1976-10-08 | 1976-10-08 | Recoading medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12106676A JPS5346019A (en) | 1976-10-08 | 1976-10-08 | Recoading medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5346019A JPS5346019A (en) | 1978-04-25 |
| JPS63847B2 true JPS63847B2 (en) | 1988-01-08 |
Family
ID=14801987
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12106676A Granted JPS5346019A (en) | 1976-10-08 | 1976-10-08 | Recoading medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5346019A (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL7903915A (en) * | 1979-05-18 | 1980-11-20 | Philips Nv | INFORMATION REGISTRATION ELEMENT. |
| JPS5690437A (en) * | 1979-12-19 | 1981-07-22 | Hitachi Ltd | Optical disc |
| JPS56130742A (en) * | 1980-03-18 | 1981-10-13 | Asahi Chem Ind Co Ltd | Novel recording material |
| JPS56142094A (en) * | 1980-04-04 | 1981-11-06 | Nippon Telegr & Teleph Corp <Ntt> | Laser beam recording member |
| JPS5722095A (en) * | 1980-07-15 | 1982-02-04 | Nec Corp | Laser beam recording material |
| JPS5727788A (en) * | 1980-07-25 | 1982-02-15 | Asahi Chem Ind Co Ltd | Information recording member |
| CA1155548A (en) * | 1980-10-31 | 1983-10-18 | Richard L. Wilkinson | Optical recording medium and method for its formation |
| JPS57159692A (en) * | 1981-03-27 | 1982-10-01 | Sony Corp | Information recording medium |
| JPS57189894A (en) * | 1981-05-20 | 1982-11-22 | Fuji Photo Film Co Ltd | Thermal recording material |
| JPS5898289A (en) * | 1981-12-07 | 1983-06-11 | Konishiroku Photo Ind Co Ltd | Optical information recording medium |
| JPS58200446A (en) * | 1982-05-18 | 1983-11-22 | Nippon Columbia Co Ltd | Optical recording medium |
| JPS58205938A (en) * | 1982-05-24 | 1983-12-01 | Nippon Columbia Co Ltd | Manufacture of optical information recording medium |
| US4477819A (en) * | 1982-06-14 | 1984-10-16 | International Business Machines Corporation | Optical recording medium |
| JPS60204393A (en) * | 1984-03-30 | 1985-10-15 | Res Dev Corp Of Japan | Recording medium |
| US5449587A (en) * | 1988-12-15 | 1995-09-12 | Mitsui Toatsu Chemicals, Incorporated | Compact disk-write once type optical recording media |
| US5280114A (en) * | 1990-04-07 | 1994-01-18 | Mitsui Toatsu Chemicals, Incorporated | Halogenation of alkoxyphthalocyanine |
| JP4778300B2 (en) | 2004-12-15 | 2011-09-21 | 株式会社リコー | Write-once optical recording medium |
-
1976
- 1976-10-08 JP JP12106676A patent/JPS5346019A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5346019A (en) | 1978-04-25 |
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