JPH09138976A - Information recording medium and its production - Google Patents
Information recording medium and its productionInfo
- Publication number
- JPH09138976A JPH09138976A JP7299597A JP29959795A JPH09138976A JP H09138976 A JPH09138976 A JP H09138976A JP 7299597 A JP7299597 A JP 7299597A JP 29959795 A JP29959795 A JP 29959795A JP H09138976 A JPH09138976 A JP H09138976A
- Authority
- JP
- Japan
- Prior art keywords
- information recording
- substrates
- electron beam
- recording medium
- curable resin
- 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
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光ディスク、光磁
気ディスク、ビデオディスク等の情報記録媒体及びその
製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information recording medium such as an optical disc, a magneto-optical disc and a video disc, and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】従来、情報記録媒体として、両面で記録
再生を行うものが知られている。この情報記録媒体は、
片面に情報記録面又情報記録層を有する円盤状基板を二
枚用意し、これらの円盤状基板を接着剤によって貼り合
わせることにより製造されている。2. Description of the Related Art Conventionally, as an information recording medium, one which performs recording and reproduction on both sides has been known. This information recording medium
It is manufactured by preparing two disc-shaped substrates each having an information recording surface or an information recording layer on one side, and adhering these disc-shaped substrates with an adhesive.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記の
ような情報記録媒体の製造方法では、接着剤の硬化速度
が遅いため十分な強度を得るのに長時間を要し、作業性
が悪いという問題があった。そのため、接着剤に増感剤
等を添加する場合があるが、この場合は添加剤が情報記
録面又情報記録層に悪影響を与えるという別の問題が生
じていた。However, in the method of manufacturing the information recording medium as described above, since the curing speed of the adhesive is slow, it takes a long time to obtain sufficient strength, and the workability is poor. was there. Therefore, a sensitizer or the like may be added to the adhesive, but in this case, another problem occurs that the additive adversely affects the information recording surface or the information recording layer.
【０００４】[0004]
【発明の目的】本発明の主な目的は、情報記録面又情報
記録層に悪影響を与えることなく硬化速度を向上できる
情報記録媒体及びその製造方法を提供することにある。An object of the present invention is to provide an information recording medium capable of improving the curing speed without adversely affecting the information recording surface or the information recording layer, and a method for producing the same.
【０００５】[0005]
【課題を解決するための手段】本発明に係る情報記録媒
体は、情報記録面又情報記録層を有する二枚の基板と、
これらの基板の間に介挿されるとともにこれらの基板を
貼り合わせている電子線硬化型樹脂とを備えたものであ
る。電子線硬化型樹脂としては、ウレタンアクリレート
が好ましい。An information recording medium according to the present invention comprises two substrates having an information recording surface or an information recording layer,
An electron beam curable resin that is interposed between these substrates and that bonds these substrates together is provided. As the electron beam curable resin, urethane acrylate is preferable.
【０００６】本発明に係る情報記録媒体の製造方法は、
情報記録面又情報記録層を有する二枚の基板を用意し、
これらの基板を電子線硬化型樹脂を塗布して貼り合わせ
た後、電子線を前記基板を透過させて前記電子線硬化型
樹脂へ照射するものである。電子線硬化型樹脂として
は、ウレタンアクリレートを用いることが好ましい。The method of manufacturing an information recording medium according to the present invention is
Prepare two substrates having an information recording surface or an information recording layer,
These substrates are coated with an electron beam curable resin and bonded to each other, and then an electron beam is transmitted through the substrate to irradiate the electron beam curable resin. Urethane acrylate is preferably used as the electron beam curable resin.
【０００７】[0007]
【作用】本発明では、二枚の基板の貼り合わせ用の接着
剤として電子線硬化型樹脂を用いている。電子線は、エ
ネルギー及び透過力が大きくかつ吸収又は反射によるエ
ネルギー損失が小さい。したがって、電子線は、基板側
から照射しても、Ｔｅ−Ｆｅ−Ｃｏ，Ｇｅ−Ｓｂ−Ｔｅ
等の情報記録層やＡｌ等の金属薄膜を容易に透過して、
電子線硬化型樹脂に十分に到達する。その結果、１秒以
下の硬化時間で基板全面を均質に硬化させることがで
き、歪や反りの無い情報記録媒体を効率よく製作するこ
とが可能となる。In the present invention, the electron beam curing type resin is used as an adhesive for bonding two substrates. The electron beam has a large energy and penetrating power and a small energy loss due to absorption or reflection. Therefore, even if the electron beam is irradiated from the substrate side, Te-Fe-Co, Ge-Sb-Te
Easily penetrates information recording layers such as Al and metallic thin films such as Al,
Sufficiently reaches the electron beam curable resin. As a result, the entire surface of the substrate can be uniformly cured in a curing time of 1 second or less, and an information recording medium without distortion or warpage can be efficiently manufactured.
【０００８】電子線硬化型樹脂は、高いエネルギーを有
する電子線によって、照射と同時に重合・架橋反応が開
始されるので、光開始剤や増感剤などを添加する必要が
ない。したがって、添加物によるガスの発生や接着膜中
の不均一な橋掛け構造の生成を防止でき、緻密で均質な
網み目構造の接着層を形成できる。また、添加物による
情報記録層や反射膜の腐食を回避できる。The electron beam curable resin does not require addition of a photoinitiator or a sensitizer because the polymerization / crosslinking reaction is started simultaneously with irradiation by the electron beam having high energy. Therefore, it is possible to prevent the generation of gas due to the additive and the generation of a non-uniform bridge structure in the adhesive film, and it is possible to form a dense and uniform adhesive layer having a network structure. Further, it is possible to avoid corrosion of the information recording layer and the reflective film due to the additive.
【０００９】電子線硬化型樹脂としてのウレタンアクリ
レートは、塗布の際の流動性及び被塗物への塗れ性が良
い。また、硬化反応効率が高く、引っ張りに強い。した
がって、密着性の良い電子線硬化型樹脂となる。Urethane acrylate as an electron beam curable resin has good fluidity at the time of application and good wettability to an object to be coated. Also, the curing reaction efficiency is high and it is strong against pulling. Therefore, the electron beam curable resin has good adhesion.
【００１０】[0010]
【発明の実施の形態】図１は、本発明の情報記録媒体の
第一実施形態を示す概略断面図である。以下、この図面
に基づき説明する。1 is a schematic sectional view showing a first embodiment of an information recording medium of the present invention. Hereinafter, description will be given with reference to this drawing.
【００１１】本実施形態の情報記録媒体１０は、情報記
録面１２１，１２２を有する二枚の基板１４１，１４２
と、基板１４１，１４２の間に介挿されるとともにこれ
らの基板１４１，１４２を貼り合わせている電子線硬化
型樹脂１６とを備えている。情報記録媒体１０は、ビデ
オディスク等の再生専用のものである。情報記録面１２
１，１２２は、例えば０，１に対応した凹凸からなる。
情報記録面１２１，１２２には、例えばアルミニウムの
反射膜１８１，１８２が被着されている。電子線硬化型
樹脂１６は、例えばウレタンアクリレートである。基板
１４１，１４２は、例えば、外形が円盤状であり、材質
がポリカーボネイトであり、透光性を有している。The information recording medium 10 of the present embodiment has two substrates 141 and 142 having information recording surfaces 121 and 122.
And an electron beam curable resin 16 that is interposed between the substrates 141 and 142 and that bonds the substrates 141 and 142 together. The information recording medium 10 is for reproduction only such as a video disc. Information recording surface 12
Reference numerals 1 and 122 are made of irregularities corresponding to 0 and 1, for example.
The information recording surfaces 121 and 122 are coated with, for example, aluminum reflection films 181 and 182. The electron beam curable resin 16 is urethane acrylate, for example. The substrates 141 and 142 have, for example, a disk-shaped outer shape, a polycarbonate material, and a light-transmitting property.
【００１２】図２は、本発明の情報記録媒体の製造方法
の第一実施形態を示す概略断面図である。以下、この図
面に基づき説明する。ただし、図１と同一部分は同一符
号を付すことにより重複説明を省略する。FIG. 2 is a schematic sectional view showing a first embodiment of the method for manufacturing an information recording medium of the present invention. Hereinafter, description will be given with reference to this drawing. However, the same parts as those in FIG.
【００１３】本実施形態は、情報記録媒体１０の製造方
法である。まず、図１（ａ）に示すよう、凹凸からなる
情報記録面１２１，１２２を有するポリカーボネイト製
の基板１４１，１４２に、膜厚80nmのアルミニウムを反
射膜１８１，１８２としてスパッタ装置により成膜す
る。次に、図２（ｂ）に示すように、電子線により硬化
接着が可能な樹脂であってウレタンアクリレートとアク
リル酸エステルモノマーの混合体であるダイキュアクリ
アＳＤ−３０１（大日本インキ化学工業（株）製）を電
子線硬化型樹脂１６１，１６２として用い、スピンコー
ト法により膜厚９μｍに成膜する。次に、図２（ｃ）に
示すように、互いの情報記録面１２１，１２２が対向す
るように密着させる。最後に、図２（ｄ）に示すよう
に、加速電圧300kV の電子線Ｅを0.5 秒照射し、電子線
硬化型樹脂１６を硬化させることにより基板１４１，１
４２を貼り合わせる。The present embodiment is a method of manufacturing the information recording medium 10. First, as shown in FIG. 1A, aluminum having a film thickness of 80 nm is formed as reflective films 181 and 182 by a sputtering apparatus on substrates 141 and 142 made of polycarbonate having information recording surfaces 121 and 122 having irregularities. Next, as shown in FIG. 2 (b), Dicure Clear SD-301 (Dainippon Ink and Chemicals, which is a resin that can be cured and adhered by an electron beam and is a mixture of urethane acrylate and acrylate monomer) Co., Ltd.) as electron beam curable resins 161, 162, and a film thickness of 9 μm is formed by spin coating. Next, as shown in FIG. 2C, the information recording surfaces 121 and 122 are brought into close contact with each other so as to face each other. Finally, as shown in FIG. 2D, the electron beam E having an accelerating voltage of 300 kV is irradiated for 0.5 seconds to cure the electron beam curable resin 16 and thereby the substrates 141, 1
42 is pasted together.
【００１４】図３は、本発明の情報記録媒体の第二実施
形態を示す概略断面図である。図４は、図３の情報記録
媒体の部分拡大断面図である。以下、これらの図面に基
づき説明する。FIG. 3 is a schematic sectional view showing a second embodiment of the information recording medium of the present invention. FIG. 4 is a partially enlarged sectional view of the information recording medium of FIG. Hereinafter, description will be given with reference to these drawings.
【００１５】本実施形態の情報記録媒体２０は、情報記
録層２２１，２２２を有する二枚の基板２４１，２４２
と、基板２４１，２４２の間に介挿されるとともにこれ
らの基板２４１，２４２を貼り合わせている電子線硬化
型樹脂２６とを備えている。情報記録媒体２０は、光磁
気ディスク等の書換可能なものである。情報記録層２２
１，２２２上には、樹脂保護膜２８１，２８２が被着さ
れている。情報記録層２２１は、基板２４１上に、誘電
体保護膜３０１、記録膜３０２、誘電体保護膜３０３及
び反射膜３０４がこの順に積層されたものである。情報
記録層２２２も情報記録層２２１と同じ構造である。電
子線硬化型樹脂２６は、例えばウレタンアクリレートで
ある。基板２４１，２４２は、例えば、外形が円盤状で
あり、材質がポリカーボネイトであり、透光性を有して
いる。The information recording medium 20 of this embodiment has two substrates 241, 242 having information recording layers 221, 222.
And an electron beam curable resin 26 that is interposed between the substrates 241 and 242 and that bonds the substrates 241 and 242 together. The information recording medium 20 is a rewritable medium such as a magneto-optical disk. Information recording layer 22
Resin protective films 281 and 282 are deposited on the substrates 1 and 222. The information recording layer 221 is formed by laminating a dielectric protective film 301, a recording film 302, a dielectric protective film 303, and a reflective film 304 on a substrate 241 in this order. The information recording layer 222 also has the same structure as the information recording layer 221. The electron beam curable resin 26 is, for example, urethane acrylate. Each of the substrates 241 and 242 has, for example, a disc-shaped outer shape, a polycarbonate material, and a light-transmitting property.
【００１６】図５は、本発明の情報記録媒体の製造方法
の第二実施形態を示す概略断面図である。以下、図３乃
至図５に基づき説明する。ただし、図３と同一部分は同
一符号を付すことにより重複説明を省略する。FIG. 5 is a schematic sectional view showing a second embodiment of the method for manufacturing an information recording medium of the present invention. Hereinafter, description will be made with reference to FIGS. However, the same parts as those in FIG.
【００１７】本実施形態は、情報記録媒体２０の製造方
法である。まず、図５（ａ）に示すように、ランド・グ
ルーブを有するポリカーボネート製の基板２４１，２４
２上に情報記録層２２１，２２２を形成する。情報記録
層２２１，２２２は、スパッタ法等により、誘電体保護
膜３０１としてＺｎＳ−ＳｉＯ2 （140nm ）、記録膜３
０２としてＧｅ2 Ｓｂ2 Ｔｅ5 （35nm）、誘電体保護膜
３０３としてＺｎＳ−ＳｉＯ2 （50nm）、反射膜３０４
としてＡｌ（80nm）を順次積層することにより形成す
る。続いて、情報記録層２２１，２２２上に、スピンコ
ート法により、紫外線硬化樹脂のダイキュアクリアＳＤ
−３１８（大日本インキ化学工業（株）製）を９μｍの
厚さに塗布する。塗布後、紫外線照射により硬化させて
樹脂保護膜２８１，２８２を形成する。次に、図５
（ｂ）に示すように、樹脂保護膜２８１，２８２上に電
子線硬化型樹脂２６１，２６２を、スピンコート法によ
り９μｍの膜厚に形成する。電子線硬化型樹脂２６１，
２６２は、電子線により硬化接着可能が可能な樹脂であ
ってウレタンアクリレートとアクリル酸エステルモノマ
ーとの混合体であるダイキュアクリアＳＤ−３０１（大
日本インキ化学工業（株）製）を用いる。次に、図５
（ｃ）に示すように、互いの情報記録層２２１，２２２
が対向するように密着させた後、図５（ｄ）に示すよう
に、加速電圧300kV の電子線Ｅを0.5 秒照射して、電子
線硬化型樹脂２６を硬化させることにより基板２４１，
２４２を貼り合わせる。This embodiment is a method of manufacturing the information recording medium 20. First, as shown in FIG. 5A, polycarbonate substrates 241 and 24 having lands and grooves are provided.
The information recording layers 221 and 222 are formed on the substrate 2. The information recording layers 221 and 222 are formed of ZnS—SiO 2 (140 nm) as the dielectric protective film 301 and the recording film 3 by a sputtering method or the like.
02 as Ge 2 Sb 2 Te 5 (35 nm), as the dielectric protective film 303 ZnS—SiO 2 (50 nm), and a reflective film 304.
Is formed by sequentially stacking Al (80 nm). Then, on the information recording layers 221, 222, a die cure clear SD of ultraviolet curable resin is applied by spin coating.
318 (manufactured by Dainippon Ink and Chemicals, Inc.) is applied to a thickness of 9 μm. After the application, the resin protective films 281 and 282 are formed by curing the resin by ultraviolet irradiation. Next, FIG.
As shown in (b), electron beam curable resins 261 and 262 are formed on the resin protective films 281 and 282 by spin coating to have a film thickness of 9 μm. Electron beam curable resin 261,
262 is a resin that can be cured and adhered by an electron beam, and is DICURE CLEAR SD-301 (manufactured by Dainippon Ink and Chemicals, Inc.), which is a mixture of urethane acrylate and acrylic ester monomer. Next, FIG.
As shown in (c), the information recording layers 221 and 222 of each other are
5A and 5B, the electron beam E having an accelerating voltage of 300 kV is irradiated for 0.5 seconds to cure the electron beam curable resin 26 so that the substrate 241,
242 is pasted together.
【００１８】本発明者は、電子線硬化型樹脂２６として
用いたＳＤ−３０１の硬化特性の評価を行った。評価方
法は、ポリカーボネイトの基板２４１上に情報記録層２
２１を成膜後、ＳＤ−３０１を塗布し、基板２４１側か
ら電子線Ｅを加速電圧300kVで0.5 秒照射して硬化させ
た試料の硬度とゲル分率を求めた。硬度は従来の紫外線
硬化による測定値より相対比較して求めた。評価の結
果、ＳＤ−３０１の硬度は12，ゲル分率は96％と良好な
値を示し、基板２４１と情報記録層２２１を通して電子
線Ｅを照射しても、ウレタンアクリレートを主成分とす
るＳＤ−３０１が十分な硬化特性を示すことを確認し
た。The present inventor evaluated the curing characteristics of SD-301 used as the electron beam curable resin 26. The evaluation method is that the information recording layer 2 is formed on the polycarbonate substrate 241.
After depositing No. 21, SD-301 was applied, and the hardness and gel fraction of the sample which was cured by irradiating the electron beam E from the substrate 241 side at an accelerating voltage of 300 kV for 0.5 seconds were determined. The hardness was determined by relative comparison with the values measured by conventional UV curing. As a result of the evaluation, the hardness of SD-301 was 12 and the gel fraction was 96%, which was a good value, and even if the electron beam E was irradiated through the substrate 241 and the information recording layer 221, SD containing urethane acrylate as a main component It was confirmed that -301 shows sufficient curing characteristics.
【００１９】次に、本発明者は、密着性を評価するた
め、電子線で硬化可能な不飽和樹脂タイプのエポキシア
クリレート及びウレタンアクリレートについてストレー
ストレインカーブを求めた。図６にウレタンアクリレー
ト及びエポキシアクリレートのストレーストレインカー
ブの一例を示す。エポキシアクリレートは、強度は強い
が引っ張りに弱いので、貼り合わせ用の接着剤としては
適していない。一方、ウレタンアクリレートは、強度は
若干劣るが引っ張りに強いので、貼り合わせ用の接着剤
に適している。Next, in order to evaluate the adhesion, the present inventor obtained a trace train curve for an electron beam-curable unsaturated resin type epoxy acrylate and urethane acrylate. FIG. 6 shows an example of the trace train curve of urethane acrylate and epoxy acrylate. Epoxy acrylate is not suitable as an adhesive for bonding because it has high strength but is weak in tension. On the other hand, urethane acrylate is slightly inferior in strength but strong in tensile strength, and is therefore suitable as an adhesive for bonding.
【００２０】[0020]
【発明の効果】本発明によれば、二枚の基板の貼り合わ
せ用の電子線硬化型樹脂に対し、基板を通して電子線を
照射することにより、１秒以下の硬化時間で基板全面を
均質に硬化させることができる。したがって、歪や反り
が極めて少なく、機械特性の良い情報記録媒体を効率の
良く製作できる。According to the present invention, an electron beam curable resin for bonding two substrates is irradiated with an electron beam through the substrates to homogenize the entire surface of the substrates with a curing time of 1 second or less. Can be cured. Therefore, it is possible to efficiently manufacture an information recording medium having excellent mechanical properties with little distortion or warpage.
【００２１】また、電子線硬化型樹脂は、高いエネルギ
ーの電子線によって、照射と同時に重合・架橋反応が開
始されるので、光開始剤や増感剤などを硬化樹脂に添加
する必要がない。したがって、添加物によるガスの発生
や接着膜中の不均一な橋掛け構造の生成を防ぎ、緻密で
均質な網目構造の接着層を形成することにより、情報記
録媒体の信頼性及び耐候性を向上できる。Further, the electron beam curable resin does not require addition of a photoinitiator or a sensitizer to the cured resin because the polymerization / crosslinking reaction is started simultaneously with irradiation by the electron beam having high energy. Therefore, the reliability and weather resistance of the information recording medium are improved by preventing the generation of gas due to additives and the formation of a non-uniform bridge structure in the adhesive film and forming a dense and uniform adhesive layer with a network structure. it can.
【００２２】さらに、電子線硬化型樹脂をウレタンアク
リレートにすることにより、塗布の際の流動性および被
塗物への塗れ性が良く、かつ硬化反応効率が高く、引っ
張りにも強く、密着性の良い接着剤として電子線硬化樹
脂を用いることができる。Further, by using urethane acrylate as the electron beam curable resin, the fluidity at the time of application and the wettability to the object to be coated are good, the curing reaction efficiency is high, the tensile strength is strong and the adhesion is high. An electron beam curable resin can be used as a good adhesive.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の情報記録媒体の第一実施形態を示す概
略断面図である。FIG. 1 is a schematic cross-sectional view showing a first embodiment of an information recording medium of the present invention.
【図２】本発明の情報記録媒体の製造方法の第一実施形
態を示す概略断面図であり、図２（ａ）〜（ｄ）の順に
工程が進行する。FIG. 2 is a schematic cross-sectional view showing a first embodiment of a method for manufacturing an information recording medium of the present invention, in which the steps proceed in the order of FIGS. 2 (a) to 2 (d).
【図３】本発明の情報記録媒体の第二実施形態を示す概
略断面図である。FIG. 3 is a schematic sectional view showing a second embodiment of the information recording medium of the present invention.
【図４】図３の情報記録媒体の部分拡大断面図である。4 is a partially enlarged cross-sectional view of the information recording medium of FIG.
【図５】本発明の情報記録媒体の製造方法の第二実施形
態を示す概略断面図であり、図５（ａ）〜（ｄ）の順に
工程が進行する。FIG. 5 is a schematic cross-sectional view showing a second embodiment of the method for manufacturing an information recording medium of the present invention, in which the steps proceed in the order of FIGS.
【図６】本発明の情報記録媒体及びその製造方法に用い
る、電子線硬化型樹脂のストレーストレインカーブの一
例を示すグラフである。FIG. 6 is a graph showing an example of a trace train curve of an electron beam curable resin used in the information recording medium of the present invention and the manufacturing method thereof.
１０，２０ 情報記録媒体 １２１，１２２ 情報記録面 １４１，１４２，２４１，２４２ 基板 １６，２６ 電子線硬化型樹脂 ２２１，２２２ 情報記録層 10, 20 Information recording medium 121, 122 Information recording surface 141, 142, 241, 242 Substrate 16, 26 Electron beam curable resin 221, 222 Information recording layer
Claims (4)
の基板と、これらの基板に間に介挿されるとともにこれ
らの基板を貼り合わせている電子線硬化型樹脂とを備え
た情報記録媒体。1. An information recording medium comprising two substrates having an information recording surface or an information recording layer, and an electron beam curable resin interposed between these substrates and bonding the substrates. .
レートである請求項１記載の情報記録媒体。2. The information recording medium according to claim 1, wherein the electron beam curable resin is urethane acrylate.
の基板を用意し、これらの基板を電子線硬化型樹脂を塗
布して貼り合わせた後、電子線を前記基板を透過させて
前記電子線硬化型樹脂へ照射する、情報記録媒体の製造
方法。3. Prepare two substrates having an information recording surface or an information recording layer, apply an electron beam curable resin to these substrates and bond them together, and then allow an electron beam to pass through the substrates and A method for manufacturing an information recording medium, which comprises irradiating an electron beam curable resin.
クリレートを用いる請求項３記載の情報記録媒体の製造
方法。4. The method for producing an information recording medium according to claim 3, wherein urethane acrylate is used as the electron beam curable resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7299597A JPH09138976A (en) | 1995-11-17 | 1995-11-17 | Information recording medium and its production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7299597A JPH09138976A (en) | 1995-11-17 | 1995-11-17 | Information recording medium and its production |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09138976A true JPH09138976A (en) | 1997-05-27 |
Family
ID=17874704
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7299597A Pending JPH09138976A (en) | 1995-11-17 | 1995-11-17 | Information recording medium and its production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09138976A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003102942A1 (en) * | 2002-06-04 | 2003-12-11 | Toyo Ink Mfg. Co., Ltd. | Optical disc and its manufacturing method |
| KR100562217B1 (en) * | 2000-04-27 | 2006-03-22 | 오리진 일렉트릭 캄파니 리미티드 | Method and apparatus for bonding optical disc substrates together, and method for supplying liquid material |
| US7132460B2 (en) | 2000-11-30 | 2006-11-07 | Mitsubishi Rayon Co., Ltd. | Active energy ray curable composition for coating optical disk and optical disk |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61168149A (en) * | 1985-01-21 | 1986-07-29 | Matsushita Electric Ind Co Ltd | Information recording disk |
| JPH025245A (en) * | 1988-06-21 | 1990-01-10 | Dainippon Printing Co Ltd | Optical recording medium |
-
1995
- 1995-11-17 JP JP7299597A patent/JPH09138976A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61168149A (en) * | 1985-01-21 | 1986-07-29 | Matsushita Electric Ind Co Ltd | Information recording disk |
| JPH025245A (en) * | 1988-06-21 | 1990-01-10 | Dainippon Printing Co Ltd | Optical recording medium |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100562217B1 (en) * | 2000-04-27 | 2006-03-22 | 오리진 일렉트릭 캄파니 리미티드 | Method and apparatus for bonding optical disc substrates together, and method for supplying liquid material |
| US7132460B2 (en) | 2000-11-30 | 2006-11-07 | Mitsubishi Rayon Co., Ltd. | Active energy ray curable composition for coating optical disk and optical disk |
| US7341771B2 (en) | 2000-11-30 | 2008-03-11 | Mitsubishi Rayon Co., Ltd. | Active energy ray curable composition for coating optical disk and optical disk |
| US7344768B2 (en) | 2000-11-30 | 2008-03-18 | Mitsubishi Rayon Co., Ltd. | Active energy ray curable composition for coating optical disk and optical disk |
| WO2003102942A1 (en) * | 2002-06-04 | 2003-12-11 | Toyo Ink Mfg. Co., Ltd. | Optical disc and its manufacturing method |
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