JPH051536B2 - - Google Patents
Info
- Publication number
- JPH051536B2 JPH051536B2 JP59154055A JP15405584A JPH051536B2 JP H051536 B2 JPH051536 B2 JP H051536B2 JP 59154055 A JP59154055 A JP 59154055A JP 15405584 A JP15405584 A JP 15405584A JP H051536 B2 JPH051536 B2 JP H051536B2
- Authority
- JP
- Japan
- Prior art keywords
- layer
- substrate
- optical recording
- recording medium
- protective
- 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 - Lifetime
Links
- 239000010410 layer Substances 0.000 claims description 42
- 239000000758 substrate Substances 0.000 claims description 30
- 230000003287 optical effect Effects 0.000 claims description 24
- 239000011241 protective layer Substances 0.000 claims description 18
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 238000007789 sealing Methods 0.000 claims description 3
- 239000010409 thin film Substances 0.000 description 11
- 230000007797 corrosion Effects 0.000 description 10
- 238000005260 corrosion Methods 0.000 description 10
- 239000010408 film Substances 0.000 description 8
- 239000012790 adhesive layer Substances 0.000 description 6
- 230000001681 protective effect Effects 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000000696 magnetic material Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229910052723 transition metal Inorganic materials 0.000 description 2
- MSAHTMIQULFMRG-UHFFFAOYSA-N 1,2-diphenyl-2-propan-2-yloxyethanone Chemical compound C=1C=CC=CC=1C(OC(C)C)C(=O)C1=CC=CC=C1 MSAHTMIQULFMRG-UHFFFAOYSA-N 0.000 description 1
- 229910016629 MnBi Inorganic materials 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
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000012298 atmosphere Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 150000001786 chalcogen compounds Chemical class 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 239000003989 dielectric material Substances 0.000 description 1
- 235000012489 doughnuts Nutrition 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 239000003999 initiator Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000007738 vacuum evaporation Methods 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
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
- G11B11/10582—Record carriers characterised by the selection of the material or by the structure or form
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
- G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
- G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
〔技術分野〕
本発明は、光ビームにより記録・再生を行うこ
とが可能な光学的記録媒体に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an optical recording medium on which recording and reproduction can be performed using a light beam.
従来より、光デイスクに用いられる光学的記録
媒体としては、希土類−遷移金属の合金薄膜、非
晶質から結晶質への相転移を利用したカルコゲン
化合物等の還元性酸化物薄膜、ヒートモード記録
媒体、サーモプラスチツク記録媒体等が知られて
いる。例えば、希土類−遷移金属の合金薄膜で形
成される光磁気記録媒体としては、MnBi、
MnCuBiなどの多結晶薄膜、GdCo、GdFe、
TbFe、DyFe、GdTbFe、TbDyFeなどの非晶質
薄膜、GdIGなどの単結晶薄膜などが知られてい
る。
Conventionally, optical recording media used in optical disks include rare earth-transition metal alloy thin films, reducing oxide thin films such as chalcogen compounds that utilize phase transition from amorphous to crystalline, and heat mode recording media. , thermoplastic recording media, etc. are known. For example, magneto-optical recording media formed from rare earth-transition metal alloy thin films include MnBi,
Polycrystalline thin films such as MnCuBi, GdCo, GdFe,
Amorphous thin films such as TbFe, DyFe, GdTbFe, and TbDyFe, and single crystal thin films such as GdIG are known.
これらの薄膜のうち、大面積の薄膜を室温近傍
の呑温度で製作する際の成膜性、信号を小さな光
熱エネルギーで書き込むための書き込み効率、お
よび書き込まれた信号をＳ／Ｎ比よく読み出すた
めの読み出し効率等を勘案して、最近では前記非
晶質薄膜が光学的記録媒体として優れていると考
えられている。GdTbFeはカー回転角も大きく、
150℃前後のキユーリー点を持つので光磁気記録
媒体として適している。更に我々はカー回転角を
向上させる目的で研究した結果、GdTbFeCoが
カー回転角が充分に大きく、Ｓ／Ｎ比の良い読み
出しが可能な光磁気記録媒体であることを見い出
した。 Among these thin films, the film forming performance when manufacturing a large-area thin film at a temperature near room temperature, the writing efficiency for writing signals with small photothermal energy, and the ability to read written signals with a good S/N ratio are important. Recently, the amorphous thin film is considered to be excellent as an optical recording medium, taking into account readout efficiency and the like. GdTbFe also has a large Kerr rotation angle,
It has a Curie point of around 150°C, making it suitable as a magneto-optical recording medium. Furthermore, as a result of our research aimed at improving the Kerr rotation angle, we found that GdTbFeCo is a magneto-optical recording medium that has a sufficiently large Kerr rotation angle and can be read with a good S/N ratio.
しかしながら、GdTbFeをはじめとして、一般
に非晶質磁性体は耐腐食性が劣り、湿気を有する
雰囲気中で腐食されて磁気特性の劣化を生じると
いう欠点がある。この欠点は、光磁気記録媒体の
みならず、上述した光学的記録媒体の共通の課題
である。 However, amorphous magnetic materials such as GdTbFe generally have poor corrosion resistance, and have the disadvantage that they are corroded in a humid atmosphere, resulting in deterioration of magnetic properties. This drawback is a common problem not only with magneto-optical recording media but also with the above-mentioned optical recording media.
このような欠点を除くために、従来から、非晶
質磁性体の記録磁性層の上に保護層を設けたり、
あるいは不活性ガスによつて記録磁性層を封じ込
めたエアーサンドイツチ構造や貼り合わせ構造の
デイスク状光磁気記録媒体が提案されている。 In order to eliminate such drawbacks, conventional methods have included providing a protective layer on the recording magnetic layer of an amorphous magnetic material,
Alternatively, a disk-shaped magneto-optical recording medium having an air sandwich structure or a laminated structure in which a recording magnetic layer is sealed with an inert gas has been proposed.
大磁気記録媒体の腐食の原因は、基板の汚れ、
媒体形成後のハンドリング等による油、汚れの付
着、湿度、酸素等であると考えられる。従つて、
光磁気記録媒体の腐食は、基板の端面からおこ
り、広がつていく傾向がある。そこで従来より、
基板の全面に形成された光学的記録層の基板端部
に形成された部分は、記録部として使用されるこ
とはなかつた。しかし、記録層の一部に腐食が始
まると、その箇所に局部電池が形成され、その周
辺の腐食が速まり最終的には記録部まで腐食が進
行してしまい、記録層の基板端面に形成された部
分を記録部として使用しないことは、耐腐食性の
向上という点からは、何ら意味のないものであ
る。 Corrosion of large magnetic recording media is caused by dirt on the substrate,
This is thought to be caused by oil, dirt, humidity, oxygen, etc. caused by handling after the medium is formed. Therefore,
Corrosion of magneto-optical recording media tends to start from the edge of the substrate and spread. Therefore, conventionally,
The portion of the optical recording layer formed on the entire surface of the substrate, which was formed at the edge of the substrate, was never used as a recording section. However, when corrosion begins in a part of the recording layer, a local battery is formed at that location, the corrosion around it accelerates, and eventually the corrosion progresses to the recording area, forming a local battery on the edge of the substrate of the recording layer. It is meaningless not to use the exposed portion as a recording section from the standpoint of improving corrosion resistance.
そこで本発明者らは、基板の外縁部及び／又は
内縁部の一部又は全部に光学的記録層を形成しな
いことを特徴とする光学的記録媒体を発明し、出
願した（特願昭58−116157号）。 Therefore, the present inventors invented and filed an application for an optical recording medium characterized in that no optical recording layer is formed on part or all of the outer edge and/or inner edge of the substrate (Japanese Patent Application No. No. 116157).
しかし、第２図に示すような案内溝を形成する
ための紫外線硬化型樹脂層５が基板１の端部まで
ある構成の記録媒体においては、紫外線硬化型樹
脂層５の端部より水分が侵入し、結局は記録層４
の腐食がおこる。 However, in a recording medium configured such that the ultraviolet curable resin layer 5 for forming guide grooves extends to the edge of the substrate 1 as shown in FIG. However, in the end, recording layer 4
Corrosion occurs.
さらに、紫外線硬化型樹脂層５が水分を吸収し
て体積変化をおこして保護層３、記録層４にクラ
ツクを発生させることもある。 Furthermore, the ultraviolet curable resin layer 5 may absorb moisture and change its volume, causing cracks in the protective layer 3 and the recording layer 4.
なお、図中、１は基板、１′は保護用基板、２
は接着層、３，３′は保護層、４は記録層、５は
紫外線硬化型樹脂層である。 In addition, in the figure, 1 is a substrate, 1' is a protective substrate, and 2
3 is an adhesive layer, 3 and 3' are protective layers, 4 is a recording layer, and 5 is an ultraviolet curing resin layer.
本発明の目的は記録部の腐食が実質的に防止さ
れた光学的記録媒体を提供することにある。
An object of the present invention is to provide an optical recording medium in which corrosion of the recording portion is substantially prevented.
この目的は次の光学的記録媒体により達成され
る。
This objective is achieved by the following optical recording medium.
すなわち、基板上に少なくとも記録層、紫外線
硬化型樹脂層および保護層を具備する光学的記録
媒体において、記録層および紫外線硬化型樹脂層
を基板の外縁部及び／又は内縁部には形成せず、
前記保護層にて封止したことを特徴とする光学的
記録媒体である。 That is, in an optical recording medium comprising at least a recording layer, an ultraviolet curable resin layer, and a protective layer on a substrate, the recording layer and the ultraviolet curable resin layer are not formed on the outer edge and/or inner edge of the substrate,
An optical recording medium characterized in that it is sealed with the protective layer.
特に好ましくは、前記記録層および紫外線硬化
型樹脂層を封止する保護層が基板の外縁部及び／
又は内縁部には形成されない光学的記録媒体であ
る。 Particularly preferably, the protective layer for sealing the recording layer and the ultraviolet curable resin layer covers the outer edge of the substrate and/or
Or it is an optical recording medium that is not formed on the inner edge.
すなわち、第５図に示すように保護層で、記録
層４及び紫外線硬化型樹脂層５を封止するが基板
の端までは保護層３を形成せず、接着層２でこれ
らの層をおおうような構造が特に好ましい。これ
によつてハンドリング等による汚れがつきにくく
なり、また温度湿度等の影響も受けにくくなるこ
とにより耐腐食性が向上する。 That is, as shown in FIG. 5, the recording layer 4 and the ultraviolet curing resin layer 5 are sealed with a protective layer, but the protective layer 3 is not formed up to the edge of the substrate, and these layers are covered with the adhesive layer 2. Such a structure is particularly preferred. This makes it less likely to get dirty due to handling, etc., and is also less susceptible to the effects of temperature, humidity, etc., thereby improving corrosion resistance.
本発明は例えば基板の外縁部、基板の外縁部と
内縁部、基板の内縁部には、記録層および紫外線
硬化型樹脂層を形成せず、保護層で封止する等の
形で実施する。 The present invention is carried out, for example, by sealing the outer edge of the substrate, the outer edge and inner edge of the substrate, and the inner edge of the substrate with a protective layer without forming a recording layer or an ultraviolet curable resin layer.
保護層としては、SiO、SiN等の無機誘電体、
Ti、Cr、Zn、Al、Saなどの金属、CnF2nなどの
有機系防湿剤が好ましい。 As a protective layer, inorganic dielectric materials such as SiO and SiN,
Metals such as Ti, Cr, Zn, Al, and Sa, and organic desiccant agents such as CnF 2 n are preferred.
本発明はエアーサンドイツチ構造や貼り合わせ
構造の光学的記録媒体に適用できる。基板と記録
層の間に、有機樹脂、染料、顔料などの断熱層
や、ZrO2、SiOなどの反射防止層またはZnS膜お
よびMgF2膜またはNa3AlF6膜より構成された、
あるいはSiO2膜およびTiO2膜あるいはZrO2膜よ
り構成された反射防止層を設けることができる。
更にMgF2、SiOなどの干渉層、Cu、Alなどの反
射層を、記録層４と接着層３′の間に設けること
ができる。 The present invention can be applied to optical recording media having an air sandwich structure or a laminated structure. Between the substrate and the recording layer, there is a heat insulating layer made of organic resin, dye, pigment, etc., an antireflection layer such as ZrO 2 or SiO, or a ZnS film, a MgF 2 film, or a Na 3 AlF 6 film.
Alternatively, an antireflection layer composed of a SiO 2 film, a TiO 2 film, or a ZrO 2 film can be provided.
Furthermore, an interference layer such as MgF 2 or SiO, or a reflective layer such as Cu or Al can be provided between the recording layer 4 and the adhesive layer 3'.
更に基板の形状については、円、ドーナツ状、
正方形、長方形、多角形等いかなる形状の基板に
も適用できる。また、表面を多孔質層に加工した
書き込み側基板を用いることもできる。ドーナツ
状基板を用いた場合の実施態様を第３図に示す。 Furthermore, regarding the shape of the board, there are various shapes such as circle, donut shape,
It can be applied to substrates of any shape, such as square, rectangle, or polygon. Alternatively, a write-side substrate whose surface is processed into a porous layer can also be used. FIG. 3 shows an embodiment using a donut-shaped substrate.
以下に実施例を示して本発明を更に具体的に説
明する。 EXAMPLES The present invention will be explained in more detail with reference to Examples below.
実施例 １
第１図に示した構造の光学的記録媒体を次のよ
うにして製作した。Example 1 An optical recording medium having the structure shown in FIG. 1 was manufactured as follows.
直径200mm、厚さ1.1mmのガラス基板１上の外縁
部５mmを除いた部分に、アクリルモノマー（商品
名：701A製造元：新中村化学工業株式会社）に
光重合開始剤ベンゾインイソプロピルエーテルを
２％を加え、0.1mm厚に塗布後、紫外線を照射し、
硬化させ外線硬化型樹脂５を作成した。紫外線硬
化型樹脂５をおおうように、真空蒸着装置にて、
保護層３としてSiOを膜厚1400Åで蒸着した。次
にスパツタリングによりGdTbFeOcの磁性薄膜
記録層４を基板の外縁部５mmを除いた部分に900
Å厚に形成した。磁性薄膜記録層をおおうよう
に、真空蒸着装置を用いて蒸着により保護層３′
としてSiOを膜厚1400Åで蒸着した。この記録層
付きのガラス板と、保護用のガラス板１′とを接
着剤〔商品名：ボンドＥセツトＭ；発売元：コニ
シ(株)〕で貼り合わせて光熱磁気記録媒体を製作し
た。この光熱磁気記録媒体を45℃、相対湿度95％
の恒温恒湿槽に入れて耐久試験を1000時間行なつ
た後、保磁力（Hc）の変化を試験前の保磁力
（Hco）に対する比率で求めた。 Add 2% of benzoin isopropyl ether, a photopolymerization initiator, to an acrylic monomer (product name: 701A Manufacturer: Shin Nakamura Chemical Industry Co., Ltd.) on a glass substrate 1 with a diameter of 200 mm and a thickness of 1.1 mm, excluding the outer 5 mm. In addition, after applying it to a thickness of 0.1 mm, it is irradiated with ultraviolet rays,
It was cured to create an external line curing resin 5. In a vacuum evaporation device, so as to cover the ultraviolet curable resin 5,
As the protective layer 3, SiO was deposited to a thickness of 1400 Å. Next, by sputtering, a magnetic thin film recording layer 4 of GdTbFeOc was deposited on the substrate except for 5 mm of the outer edge.
It was formed to a thickness of Å. A protective layer 3' is deposited using a vacuum evaporator to cover the magnetic thin film recording layer.
As a result, SiO was deposited to a thickness of 1400 Å. This glass plate with the recording layer and the protective glass plate 1' were bonded together with an adhesive [trade name: Bond E Set M; sold by Konishi Co., Ltd.] to produce a photothermal magnetic recording medium. This photothermal magnetic recording medium was heated at 45℃ and relative humidity 95%.
After conducting a durability test for 1000 hours in a constant temperature and humidity chamber, the change in coercive force (Hc) was determined as a ratio to the coercive force (Hco) before the test.
比較のために第２図に示した構造の光熱磁気記
録媒体を実施例と同じ材料、膜厚、作成法にて製
作した。実施例と同様に耐久試験を行なつた。 For comparison, a photothermal magnetic recording medium having the structure shown in FIG. 2 was manufactured using the same materials, film thickness, and manufacturing method as in the example. A durability test was conducted in the same manner as in the examples.
耐久試験の結果を第４図に示す。ａは実施例１
の結果であり、ｂは比較例の結果である。実施例
１の方が比較例に比べ耐久性に優れていた。 The results of the durability test are shown in Figure 4. a is Example 1
b is the result of the comparative example. Example 1 had better durability than Comparative Example.
実施例 ２
第５図に示した構造の光学的記録媒体を実施例
１と同様に製作した。但し第５図のものは保護層
３，３′を基板外縁部には設けずに接着層２で覆
つている。第５図に示した構造の光熱磁気記録媒
体を実施例１と同様に耐久試験を行つた。耐久試
験の結果は第１図の構造のものと同じで差はなか
つたが接着層２が基板１と保護用基板１′を直接
接着することができ密着力を向上させることがで
きた。Example 2 An optical recording medium having the structure shown in FIG. 5 was manufactured in the same manner as in Example 1. However, in the case of FIG. 5, the protective layers 3, 3' are not provided on the outer edge of the substrate, but are covered with the adhesive layer 2. A durability test was conducted on the photothermal magnetic recording medium having the structure shown in FIG. 5 in the same manner as in Example 1. The results of the durability test were the same as those of the structure shown in FIG. 1, and there was no difference, but the adhesive layer 2 was able to directly bond the substrate 1 and the protective substrate 1', and the adhesion was improved.
第１図、第３図、第５図は本発明の光学的記録
媒体であり、第２図は従来の光学的記録媒体であ
り、第４図は本発明及び従来の光学的記録媒体の
耐久試験の結果である。
１……基板、１′……保護用基板、２……接着
層、３，３′……保護層、４……記録層、５……
紫外線硬化型樹脂層。
Figures 1, 3, and 5 show the optical recording medium of the present invention, Figure 2 shows the conventional optical recording medium, and Figure 4 shows the durability of the optical recording medium of the present invention and the conventional optical recording medium. These are the results of the test. 1... Substrate, 1'... Protective substrate, 2... Adhesive layer, 3, 3'... Protective layer, 4... Recording layer, 5...
UV-curable resin layer.
Claims (1)
脂層および保護層を具備する光学的記録媒体にお
いて、記録層および紫外線硬化型樹脂層を基板の
外縁部及び／又は内縁部には形成せず、前記保護
層にて封止したことを特徴とする光学的記録媒
体。 ２ 前記記録層および紫外線硬化型樹脂層を封止
する保護層が基板の外縁部及び／又は内縁部には
形成されないことを特徴とする特許請求の範囲第
１項記載の光学的記録媒体。[Claims] 1. In an optical recording medium comprising at least a recording layer, an ultraviolet curable resin layer, and a protective layer on a substrate, the recording layer and the ultraviolet curable resin layer are provided on the outer edge and/or inner edge of the substrate. An optical recording medium characterized in that the optical recording medium is sealed with the protective layer without forming the protective layer. 2. The optical recording medium according to claim 1, wherein a protective layer for sealing the recording layer and the ultraviolet curable resin layer is not formed on the outer edge and/or inner edge of the substrate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15405584A JPS6134745A (en) | 1984-07-26 | 1984-07-26 | Photoelectromagnetic recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15405584A JPS6134745A (en) | 1984-07-26 | 1984-07-26 | Photoelectromagnetic recording medium |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5345857A Division JPH07176078A (en) | 1993-12-24 | 1993-12-24 | Optical recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6134745A JPS6134745A (en) | 1986-02-19 |
| JPH051536B2 true JPH051536B2 (en) | 1993-01-08 |
Family
ID=15575923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15405584A Granted JPS6134745A (en) | 1984-07-26 | 1984-07-26 | Photoelectromagnetic recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6134745A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2526864B2 (en) * | 1986-04-16 | 1996-08-21 | ソニー株式会社 | Optical recording medium |
| TWI308749B (en) | 2002-03-07 | 2009-04-11 | Fuji Corp | Optically information-recording medium |
| WO2005088629A1 (en) * | 2004-03-15 | 2005-09-22 | Matsushita Electric Industrial Co., Ltd. | Multilayer information recording medium and process for producing the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57172545A (en) * | 1981-04-16 | 1982-10-23 | Toshiba Corp | Information storage medium |
| JPS57172547A (en) * | 1981-04-17 | 1982-10-23 | Toshiba Corp | Information storage medium |
| JPS5852652B2 (en) * | 1980-12-04 | 1983-11-24 | 日本糧冷株式会社 | Cold rice bin device |
| JPS5977647A (en) * | 1982-10-26 | 1984-05-04 | Matsushita Electric Ind Co Ltd | Optical type disc |
| JPS59152255A (en) * | 1983-02-18 | 1984-08-30 | 松原 十四生 | Manufacture of foamed heat resistant heat insulative material |
| JPS60113343A (en) * | 1983-11-24 | 1985-06-19 | Fujitsu Ltd | Optical disk |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5852652U (en) * | 1981-10-06 | 1983-04-09 | キヤノン株式会社 | photothermal magnetic recording medium |
-
1984
- 1984-07-26 JP JP15405584A patent/JPS6134745A/en active Granted
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5852652B2 (en) * | 1980-12-04 | 1983-11-24 | 日本糧冷株式会社 | Cold rice bin device |
| JPS57172545A (en) * | 1981-04-16 | 1982-10-23 | Toshiba Corp | Information storage medium |
| JPS57172547A (en) * | 1981-04-17 | 1982-10-23 | Toshiba Corp | Information storage medium |
| JPS5977647A (en) * | 1982-10-26 | 1984-05-04 | Matsushita Electric Ind Co Ltd | Optical type disc |
| JPS59152255A (en) * | 1983-02-18 | 1984-08-30 | 松原 十四生 | Manufacture of foamed heat resistant heat insulative material |
| JPS60113343A (en) * | 1983-11-24 | 1985-06-19 | Fujitsu Ltd | Optical disk |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6134745A (en) | 1986-02-19 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |