JPS61131254A - optical information recording medium - Google Patents
optical information recording mediumInfo
- Publication number
- JPS61131254A JPS61131254A JP59252706A JP25270684A JPS61131254A JP S61131254 A JPS61131254 A JP S61131254A JP 59252706 A JP59252706 A JP 59252706A JP 25270684 A JP25270684 A JP 25270684A JP S61131254 A JPS61131254 A JP S61131254A
- Authority
- JP
- Japan
- Prior art keywords
- thin film
- light
- recording
- recording medium
- information recording
- 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 abstract description 20
- 239000010409 thin film Substances 0.000 claims abstract description 30
- 239000010408 film Substances 0.000 claims abstract description 26
- 239000000956 alloy Substances 0.000 claims abstract description 12
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 12
- 239000000758 substrate Substances 0.000 claims abstract description 11
- 239000013078 crystal Substances 0.000 claims abstract description 8
- 239000002184 metal Substances 0.000 claims description 20
- 239000006096 absorbing agent Substances 0.000 claims description 17
- 229920005596 polymer binder Polymers 0.000 claims description 3
- 239000002491 polymer binding agent Substances 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims 1
- 239000007787 solid Substances 0.000 claims 1
- 239000010410 layer Substances 0.000 abstract description 16
- 230000000694 effects Effects 0.000 abstract description 6
- 239000011230 binding agent Substances 0.000 abstract description 5
- 230000001681 protective effect Effects 0.000 abstract description 5
- 239000011241 protective layer Substances 0.000 abstract description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 abstract description 2
- 238000004544 sputter deposition Methods 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 229910052681 coesite Inorganic materials 0.000 abstract 1
- 229910052906 cristobalite Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 235000012239 silicon dioxide Nutrition 0.000 abstract 1
- 229910052682 stishovite Inorganic materials 0.000 abstract 1
- 229910052905 tridymite Inorganic materials 0.000 abstract 1
- 238000007740 vapor deposition Methods 0.000 abstract 1
- 229920000642 polymer Polymers 0.000 description 6
- 230000031700 light absorption Effects 0.000 description 5
- 230000008016 vaporization Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009834 vaporization Methods 0.000 description 3
- 239000000020 Nitrocellulose Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 229920001220 nitrocellulos Polymers 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 229920006015 heat resistant resin Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002576 ketones Chemical class 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 metal complex salt Chemical class 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229920006254 polymer film Polymers 0.000 description 1
- 238000003303 reheating Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000004528 spin coating 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
-
- 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
- G11B7/242—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
- G11B2007/24302—Metals or metalloids
- G11B2007/24304—Metals or metalloids group 2 or 12 elements (e.g. Be, Ca, Mg, Zn, Cd)
-
- 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
- G11B2007/24302—Metals or metalloids
- G11B2007/24308—Metals or metalloids transition metal elements of group 11 (Cu, Ag, Au)
-
- 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
- G11B7/0055—Erasing
- G11B7/00557—Erasing involving phase-change media
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
- Thermal Transfer Or Thermal Recording In General (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はレーザー光を用いた情報の消去可能な記録再生
がなされる光情報記録媒体に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to an optical information recording medium on which information can be recorded and reproduced in an erasable manner using a laser beam.
一般に、レーザー光による情報の記録再生を行なう場合
、レーザー光を用いて記録部材を蒸発あるいは気化させ
ることによって情報の記録を行なうヒートモード記録方
法が知られている。この記録方法は高密度記録が可能で
ある。Generally, when recording and reproducing information using laser light, a heat mode recording method is known in which information is recorded by evaporating or vaporizing a recording member using laser light. This recording method allows high-density recording.
しかしながらヒートモード記録方式では記録部材を蒸発
又は気化させることによって記録がなされるため消去可
能な記録再生ができない欠点がある。However, the heat mode recording method has the disadvantage that erasable recording and reproduction cannot be performed because recording is performed by evaporating or vaporizing the recording member.
また、記録材料としてＡｔなどの金属薄膜を用いたディ
スクをヒートモード記録のために利用する方法は、ビデ
オディスクの原板作製などにすでに応用されている。こ
の場合、記録材料としてのＡｔ金属薄膜は高融点であり
、記録に大規模なレーザーを必要とするため、ユーザー
側で記録を行なうには不向きである。これに対し、記録
材料としてのＢｉ膜＋ Ｔｅｔ又はＳｅ系薄膜などの
低融点金属薄膜、低沸点金属薄膜によるヒートモード記
録は、記録パワーの低減化が図られる点で有利であるが
、さらに低パワー記録が可能なものが望まれている。一
方、カーボンブラック、染料などの光吸収体にニトロセ
ルロースをバインダーとして混合して作製した薄膜は、
高分子膜が低温で分解、気化してしまうため、記録に要
するエネルギーは極めて小さく、ユーザー側でのヒート
モード記録のために有利である。かかる事柄は、特開昭
５８−１３３６４９ 号公報にも記載されている。Furthermore, a method of using a disk using a thin film of metal such as At as a recording material for heat mode recording has already been applied to the production of original plates for video disks. In this case, the At metal thin film used as the recording material has a high melting point and requires a large-scale laser for recording, making it unsuitable for recording by the user. On the other hand, heat mode recording using a Bi film + a low melting point metal thin film such as a Tet or Se-based thin film, or a low boiling point metal thin film as a recording material is advantageous in that it can reduce the recording power, but it also has the advantage of reducing the recording power. What is desired is something that can record power. On the other hand, thin films made by mixing light absorbers such as carbon black and dyes with nitrocellulose as a binder are
Since the polymer film decomposes and vaporizes at low temperatures, the energy required for recording is extremely small, which is advantageous for heat mode recording on the user's side. This matter is also described in JP-A-58-133649.
しかしながら前述したようにヒートモード記録の場合は
記録部材が分解、気化してしまうために消去可能な記録
再生ができない欠点を有する。However, as described above, heat mode recording has the disadvantage that erasable recording and reproduction cannot be performed because the recording member decomposes and vaporizes.
本発明はこれらの欠点を解消するものであシ、その目的
とするところは予め設けたトラック案内溝に基づいて低
パワーでの消去可能な情報記録ができる光情報記録媒体
を提供することにある。The present invention aims to eliminate these drawbacks, and its purpose is to provide an optical information recording medium that allows erasable information recording with low power based on track guide grooves provided in advance. .
本発明はトラック案内溝、トラック番号などに対応する
情報を予め溝加工して施した基板上に、この基板側から
順に金属薄膜と光吸収体としての高分子バインダーから
なる記録薄膜、さらに光吸収体の気化、蒸発を防止する
ための保護層か全域とＬ館砥仇を設けたものである。こ
の場合、金属薄膜は、レーザ光によるエネルギーで結晶
構造が変化しやすいことが必要である。すなわち本発明
の光情報記録媒体は金属結晶によって光の反射率が異な
ることを知見し、その反射率の差からＳ／Ｎの良好な光
情報記録媒体を得るものである。In the present invention, a recording thin film consisting of a metal thin film and a polymer binder as a light absorber is formed on a substrate on which information corresponding to track guide grooves, track numbers, etc. are pre-grooved, and then a light absorbing A protective layer is provided over the entire area to prevent vaporization and evaporation of the body, as well as an L-shaped barrier. In this case, the metal thin film needs to have a crystal structure that is easily changed by the energy of the laser beam. That is, in the optical information recording medium of the present invention, it has been discovered that the reflectance of light varies depending on the metal crystal, and an optical information recording medium with a good S/N ratio can be obtained from the difference in reflectance.
以下、本発明の光情報記録媒体について実施例の図面と
共に説明する。第１図は本発明の一実施例を示しており
、第１図において、１は片面にトラック案内溝１ａを設
けた基板、２は上記基板１上に設けた金属薄膜、３は上
記金属薄膜２上に設けた高分子バインダーを有する光吸
収体、４は先発の防鳥μからなる光情報記録媒体である
。この４Ｎ構造のディスクは、具体的には深さ１１００
ｎのトラック案内溝１ａを表面に加工したアクリル基板
１に金属薄膜２としてＡｇ５ｓＺｎ３ｓ合金層を５Ｑｎ
ｍの厚さにスパッター蒸着にて形成し、さらに光吸収体
として金属錯塩、バインダーとしてニトロセルロースを
１＝１の割合でケトン系溶剤に溶かした溶液を２００Ｏ
ｒ−の回転数にて回転塗布後乾燥処理によシ厚さ２００
ｎｍの光吸収膜を形成し、その後スパッター蒸着によ、
ＱＳｉ０２膜を厚さ１１００ｎ以上形成することによシ
作製した。ここで、光記録媒体としての金属薄膜２のＡ
ｇａ５Ｚｎｓｓ合金層は第２図に示すように結晶構造に
よｐ反射率の変化があシ、また、第３図に示すこて、光
記録媒体としてＡｇａｓＺｎａｓ合金膜を用いた場合の
記録原理について説明する。先ずＡｇａｓ Ｚ ｎａｓ
合金膜は３２００以上に加熱後急冷却することによシそ
の結晶構造はβ相を示すが、そのβ相は１８０〜３１９
Ｃの温度範囲に再加熱することによシ結晶構造はｐ相を
呈することが知られている。・ここで、この結晶構造の
相異は第２図に示すように反射率が異なるため、任意の
光波長における光記録媒体として利用できるものでおる
。Hereinafter, the optical information recording medium of the present invention will be explained with reference to drawings of embodiments. FIG. 1 shows an embodiment of the present invention. In FIG. 1, 1 is a substrate provided with a track guide groove 1a on one side, 2 is a metal thin film provided on the substrate 1, and 3 is the metal thin film. 2 is an optical information recording medium consisting of a light absorber having a polymer binder provided thereon, and 4 is a bird control μ of the original company. Specifically, this 4N structure disk has a depth of 1100 mm.
A 5Qn Ag5sZn3s alloy layer is formed as a metal thin film 2 on an acrylic substrate 1 which has track guide grooves 1a formed on its surface.
The film was formed to a thickness of m by sputter deposition, and a solution containing a metal complex salt as a light absorber and nitrocellulose as a binder dissolved in a ketone solvent at a ratio of 1:1 was prepared at 200O
Thickness: 200mm by spin coating at r-rotation speed and drying process.
After forming a light absorption film with a wavelength of 100 nm,
It was manufactured by forming a QSi02 film with a thickness of 1100 nm or more. Here, A of the metal thin film 2 as an optical recording medium is
As shown in Fig. 2, the ga5Znss alloy layer has a change in p reflectance due to its crystal structure, and Fig. 3 explains the recording principle when using an AgasZnas alloy film as an optical recording medium. do. First of all, Agas Z nas
When the alloy film is heated to 3200 or more and then rapidly cooled, its crystal structure shows a β phase, but the β phase is 180 to 319
It is known that the crystalline structure exhibits a p-phase by reheating to a temperature range of C.・Here, the difference in crystal structure results in a difference in reflectance as shown in FIG. 2, so it can be used as an optical recording medium at any optical wavelength.
ζ
図中イはβ相、口は・β相を示している。しかじな途ら
ＡｇａｓＺｎｓｓ光記録媒体は基板上に単相のみ形成し
た場合は第３図のＡに示すように光源パワーによる加熱
効果が悪いため記録及び消去時間が遅くなる。これは記
録媒体膜としてのＡｇａｓＺｎｓｉ合金膜が光吸収効果
が少ないことによるものと考えられる。そこで光記録媒
体特性を向上させるためには光吸収効果のよい高分子薄
膜層からなる前記光吸収体４を形成させる必要がある。ζ In the figure, A indicates the β phase, and the mouth indicates the β phase. However, when an Agas Znss optical recording medium is formed with only a single phase on a substrate, the recording and erasing times become slow due to the poor heating effect due to the light source power, as shown in A of FIG. This is considered to be because the AgasZnsi alloy film as the recording medium film has little light absorption effect. Therefore, in order to improve the characteristics of the optical recording medium, it is necessary to form the light absorber 4 made of a polymer thin film layer with good light absorption effect.
第３図のＢはｋｇｓｓＺｎｓｓ合金膜上に光吸収体を設
置した場合の記録投入時パワーと合金膜厚との関係を示
す。B in FIG. 3 shows the relationship between the recording input power and the alloy film thickness when a light absorber is placed on the kgssZnss alloy film.
図から光吸収体を設けることによシ記録効率が大幅に向
上することが知られる。しかし、本発明情報記録媒体は
ＡｇａｓＺｎｓ５合金膜厚さが２００ ｎｍ以上になる
と光が透過しないために光吸収膜４の効果が生じない。It is known from the figure that the recording efficiency is greatly improved by providing a light absorber. However, in the information recording medium of the present invention, when the thickness of the AgasZns5 alloy film is 200 nm or more, no light is transmitted through it, so that the effect of the light absorption film 4 is not produced.
１．７’ｃＡ ｇａｓ、Ｚ ｒ１３１１合金膜２の厚さ
が１０ｎｍ以下の場合は欠陥のない記録媒体膜の形成が
困難となるばかシでなく反射率が低下するなど情報記録
媒体特性が低下する。このため、ＡｇａｓＺｎａｓ合金
膜を情報記録媒体として用いる場合の膜厚は１０〜２０
０ｎｍの範囲にすることが望ましい。一方情報記録媒体
特性を向上させる目的で形成した高分子層からなる光吸
収体３は記録消去時における熱拡散の影響から４０〜３
００ｎｍの範囲に形成させることが望ましい。すなわち
光吸収体３に吸収された光はエネルギーに交換されるが
、その場合光吸収体３の膜厚が４Ｑｎｍ以下では吸収光
のエネルギー変換効率が悪く、また、膜厚が３ＱＱｎｍ
以上になると熱拡散により記録消去に適したエネルギー
状態が得られなくことによるものである。この高分子層
からなる光吸収体３を保護するために設けた保護膜層４
は高分子層に光が照射された場合に気化蒸発による高分
子層の損失を防止するために設けたものである。If the thickness of the 1.7'cA gas, Z r1311 alloy film 2 is less than 10 nm, it will be difficult to form a recording medium film without defects, and the characteristics of the information recording medium will deteriorate, such as a decrease in reflectance. . Therefore, when using an AgasZnas alloy film as an information recording medium, the film thickness is 10 to 20
It is desirable to set it in the range of 0 nm. On the other hand, the light absorber 3 made of a polymer layer formed for the purpose of improving the characteristics of the information recording medium is 40 to 3
It is desirable to form it in the range of 00 nm. That is, the light absorbed by the light absorber 3 is exchanged into energy, but in this case, if the film thickness of the light absorber 3 is 4Q nm or less, the energy conversion efficiency of the absorbed light is poor;
This is because if the temperature exceeds that level, an energy state suitable for recording and erasing cannot be obtained due to thermal diffusion. A protective film layer 4 provided to protect the light absorber 3 made of this polymer layer
is provided to prevent loss of the polymer layer due to vaporization when the polymer layer is irradiated with light.
すなわち高分子層の光吸収体は光吸収によυ高エネルギ
ー状態になるが、その際５ｉＣｈや各種の耐熱樹脂、セ
ラミックスなどち密質の物質で光吸収体を覆うように設
置することによシ光吸収体のよる損失を防止する目的の
ために設けるのであるから、保護膜層の膜厚は気化、蒸
発が防止できるｔト
適当な厚さを有Ｂばよい。保護膜層として５ｊ０２を用
いた例について示せば２０ｎｍ以上の膜厚を有すること
が望ましい。In other words, the light absorber in the polymer layer becomes υ high energy state due to light absorption, but in this case, the light absorber can be covered with a dense material such as 5iCh, various heat-resistant resins, and ceramics. Since it is provided for the purpose of preventing loss due to the light absorber, the thickness of the protective film layer should be an appropriate thickness that can prevent vaporization and evaporation. In an example using 5j02 as a protective film layer, it is desirable to have a film thickness of 20 nm or more.
このように作製したディスクを用いて８ｍＷの媒体投入
パワーで記録を行なった結果、［〔発明の効果〕
以上のように本発明によれば、トラック案内溝を予め形
成した基板上に金属薄膜を設け、この金属薄膜上に高分
子バインダーを有する光吸収体を設け、さらに、光吸収
体の保護層を設けているのでトラッキング可能な光情報
記録媒体を提供することができ、ユーザー側でのよシ低
パワーでの記録消去ができる利点を有する。As a result of recording with a medium input power of 8 mW using the disc manufactured in this manner, [[Effects of the Invention] As described above, according to the present invention, a metal thin film was formed on a substrate on which track guide grooves were formed in advance. A light absorber having a polymeric binder is provided on the metal thin film, and a protective layer for the light absorber is further provided, making it possible to provide a trackable optical information recording medium, which makes it easy for users to It has the advantage that recording and erasing can be performed with low power.
第２図は光情報記録ディスクに使用した金属層の光波長
に対する反射率の変化を示す特性図、第３図は金属層の
膜厚に対する記録膜の記録感度の変化を示す特性図、第
４図は本発明による光情報ディスクの記録後の構造を示
す断面図である。Figure 2 is a characteristic diagram showing the change in reflectance of the metal layer used in the optical information recording disk with respect to the optical wavelength; Figure 3 is a characteristic diagram showing the change in recording sensitivity of the recording film with respect to the thickness of the metal layer; The figure is a sectional view showing the structure of the optical information disc after recording according to the present invention.
１・・・基板、１ａ・・・トラック案内溝、２・・・金
属薄膜、３・・・記録薄膜、４・・・保護膜、５・・・
記録薄膜層。DESCRIPTION OF SYMBOLS 1... Substrate, 1a... Track guide groove, 2... Metal thin film, 3... Recording thin film, 4... Protective film, 5...
Recording thin film layer.
５皮 辰（ｍｍ）5 skin dragon (mm)
Claims (1)
る基板と、この基板上に設けられた金属薄膜と、この金
属薄膜上に設けられた光吸収体と高分子バインダーから
なる記録薄膜およびその上の保護膜を備え、前記金属薄
膜は高温の固体状態からの急冷によつて室温での平衡相
と異なる結晶構造を形成する金属又は合金からなること
を特徴とする光情報記録媒体。1. A recording thin film consisting of a substrate having a track guide groove for alignment of beam light, a metal thin film provided on this substrate, a light absorber and a polymer binder provided on this metal thin film, and its recording thin film. 1. An optical information recording medium, wherein the thin metal film is made of a metal or an alloy that forms a crystal structure different from an equilibrium phase at room temperature upon rapid cooling from a high-temperature solid state.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59252706A JPS61131254A (en) | 1984-11-29 | 1984-11-29 | optical information recording medium |
| US06/801,950 US4651172A (en) | 1984-11-29 | 1985-11-26 | Information recording medium |
| CA000496335A CA1238489A (en) | 1984-11-29 | 1985-11-27 | Information recording medium |
| DE8585308665T DE3583599D1 (en) | 1984-11-29 | 1985-11-28 | INFORMATION RECORDING MEDIUM. |
| EP85308665A EP0186329B1 (en) | 1984-11-29 | 1985-11-28 | Information recording medium |
| KR1019850008929A KR920001263B1 (en) | 1984-11-29 | 1985-11-29 | How to record and erase information |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59252706A JPS61131254A (en) | 1984-11-29 | 1984-11-29 | optical information recording medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS61131254A true JPS61131254A (en) | 1986-06-18 |
Family
ID=17241114
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59252706A Pending JPS61131254A (en) | 1984-11-29 | 1984-11-29 | optical information recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61131254A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5840466A (en) * | 1994-03-25 | 1998-11-24 | Toray Industries, Inc. | Optical recording media and their production methods |
| US6300039B1 (en) * | 1994-03-25 | 2001-10-09 | Toray Industries, Inc. | Optical recording medium |
-
1984
- 1984-11-29 JP JP59252706A patent/JPS61131254A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5840466A (en) * | 1994-03-25 | 1998-11-24 | Toray Industries, Inc. | Optical recording media and their production methods |
| US6300039B1 (en) * | 1994-03-25 | 2001-10-09 | Toray Industries, Inc. | Optical recording medium |
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