JPS63188837A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPS63188837A JPS63188837A JP62019637A JP1963787A JPS63188837A JP S63188837 A JPS63188837 A JP S63188837A JP 62019637 A JP62019637 A JP 62019637A JP 1963787 A JP1963787 A JP 1963787A JP S63188837 A JPS63188837 A JP S63188837A
- Authority
- JP
- Japan
- Prior art keywords
- protective film
- light beam
- substrate
- optical disk
- plastic substrate
- 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.)
- Granted
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 15
- 230000001681 protective effect Effects 0.000 claims abstract description 33
- 239000000758 substrate Substances 0.000 claims abstract description 30
- 239000002904 solvent Substances 0.000 claims abstract description 27
- 229920003023 plastic Polymers 0.000 claims abstract description 26
- 229920005989 resin Polymers 0.000 claims abstract description 19
- 239000011347 resin Substances 0.000 claims abstract description 19
- 239000004033 plastic Substances 0.000 abstract description 25
- 238000003848 UV Light-Curing Methods 0.000 abstract 2
- 238000001723 curing Methods 0.000 abstract 1
- 239000004417 polycarbonate Substances 0.000 description 16
- 239000000428 dust Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- ZWEHNKRNPOVVGH-UHFFFAOYSA-N 2-Butanone Chemical compound CCC(C)=O ZWEHNKRNPOVVGH-UHFFFAOYSA-N 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 description 3
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 239000003822 epoxy resin Substances 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 229920000647 polyepoxide Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- BDERNNFJNOPAEC-UHFFFAOYSA-N propan-1-ol Chemical compound CCCO BDERNNFJNOPAEC-UHFFFAOYSA-N 0.000 description 2
- 229920005992 thermoplastic resin Polymers 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229920000298 Cellophane Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 125000000524 functional group Chemical group 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012046 mixed solvent Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 150000003377 silicon compounds Chemical class 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- -1 vinyl compound Chemical class 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
- 210000002268 wool Anatomy 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、光ビームの照射によって情報信号を再生でき
る光ディスクに係わり、特に、基板の保護膜に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an optical disc in which information signals can be reproduced by irradiation with a light beam, and particularly to a protective film for a substrate.
光ディスクの基板の材料としては、生産性、コストなど
の面から、−ａにＰＣ（ポリカーボネイト樹脂） 、Ｐ
ＭＭＡ （ポリメチルメタクリレート樹脂）などの熱可
塑性樹脂やエポキシ樹脂などの熱硬化性樹脂が用いられ
ている。このようなプラスチック材料からなる基板、す
なわち、プラスチック基板の一方の面には情報信号を表
わすビット列からなるトラックが形成されており、他方
の面から光ビームを照射してトラックを走査することに
より、情報信号を再生することができる。From the viewpoint of productivity and cost, -a, PC (polycarbonate resin), P
Thermoplastic resins such as MMA (polymethyl methacrylate resin) and thermosetting resins such as epoxy resins are used. A track made of a bit string representing an information signal is formed on one side of a substrate made of such a plastic material, that is, a plastic substrate, and by scanning the track by irradiating a light beam from the other side, Information signals can be reproduced.
かかる光ディスクにおいては、情報信号を良好に再生で
きるためには、プラスチック基板の光ビームが照射され
る面、すなわち光ビーム照射面が一様に平坦でかつ塵芥
などが付着しないことが必要である。In such an optical disc, in order to be able to reproduce information signals satisfactorily, it is necessary that the surface of the plastic substrate onto which the light beam is irradiated, that is, the light beam irradiation surface, be uniformly flat and free from dust and dirt.
しかしながら、従来では、光ビーム照射面は露出されて
おり、このために、往々にして傷がついたり、塵芥など
が付着しやすい。また、誤って溶剤などによって基板表
面が汚染されたりすることもある。光ビーム照射面に傷
がつくと、そこで照射される光ビームが乱反射され、再
生情報信号にレベル変動が生ずるし、また、塵芥や溶剤
などが付着すると、光ビームの透過量が変化して再生情
報信号にレベル変動が生ずる。特に、溶剤などが付着す
ると、これによってプラスチック基板が溶解し、光ビー
ム照射面に傷がつくことになる。塵芥や溶剤などが付着
したときにはこれらを拭き取ればよいが、プラスチック
基板は比較的柔らかいために、光ビーム照射面に傷がつ
きやすいし、また、光ビーム照射面が帯電して塵芥がよ
り付着しやすくなる。However, conventionally, the light beam irradiation surface is exposed, and as a result, it is often prone to being scratched or attracting dust and the like. Furthermore, the surface of the substrate may be accidentally contaminated with solvent or the like. If the light beam irradiation surface is scratched, the light beam irradiated there will be reflected diffusely, causing level fluctuations in the reproduced information signal.Furthermore, if dust or solvent adheres to the surface, the amount of light beam transmitted will change and playback will be affected. Level fluctuations occur in the information signal. In particular, if a solvent or the like adheres, this will melt the plastic substrate and cause damage to the surface irradiated with the light beam. If dust or solvent adheres to it, you can wipe it off, but since the plastic substrate is relatively soft, the light beam irradiated surface is easily scratched, and the light beam irradiated surface becomes electrically charged, making it more likely that dust will adhere to it. It becomes easier.
一方、プラスチック基板の光ビーム照射面側に保護膜を
設けることが知られている。その−例として、実開昭５
４−１７９１０４号公報においては、保護膜としてシリ
コン化合物とビニール化合物の混合体とし、光ビーム照
射面の防曇性、耐摩耗性を改善した光ディスクが開示さ
れている。On the other hand, it is known to provide a protective film on the side of the plastic substrate irradiated with the light beam. As an example,
No. 4-179104 discloses an optical disc in which a mixture of a silicon compound and a vinyl compound is used as a protective film to improve the antifogging properties and abrasion resistance of the surface irradiated with a light beam.
しかしながら、かかる混合体は熱硬化性樹脂であり、こ
れによる保護膜を形成するためには、プラスチック基板
にこの混合体を塗布した後、熱を加えて硬化させる必要
があるが、その硬化に数時間を要し、光ディスクの生産
性に問題がある。しかも、硬化のための加熱温度が比較
的高温であるために、プラスチック基板が熱変形してし
まうことになる。However, such a mixture is a thermosetting resin, and in order to form a protective film using it, it is necessary to apply heat and cure the mixture on a plastic substrate, but the curing process requires several steps. This takes time and poses a problem in the productivity of optical discs. Furthermore, since the heating temperature for curing is relatively high, the plastic substrate will be thermally deformed.
また、シリコン系樹脂は強アルカリ性の溶剤に容易に浸
かされるし、硬度が高すぎてしかもプラスチック材とは
熱膨張率が異なるために、温度変化によってプラスチッ
ク基板が膨張、収縮すると、保護膜にクラックが生じた
り、保護膜が剥離するという問題がある。In addition, silicone resin is easily immersed in strong alkaline solvents, and its hardness is too high and its coefficient of thermal expansion is different from that of plastic materials, so when the plastic substrate expands or contracts due to temperature changes, the protective film may deteriorate. There are problems in that cracks occur and the protective film peels off.
本発明の目的は、かかる問題点を解消し、光ビーム照射
面側の耐傷性に優れ、しかも性能や生産性が向上した光
ディスクを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to solve these problems and to provide an optical disc that has excellent scratch resistance on the light beam irradiated surface side and has improved performance and productivity.
上記目的を達成するために、本発明は、光ビーム照射面
側に溶剤型紫外線硬化樹脂からなる保護膜を設けたもの
である。In order to achieve the above object, the present invention provides a protective film made of a solvent type ultraviolet curing resin on the side of the light beam irradiation surface.
以下、本発明の実施例を図面によって説明する。 Embodiments of the present invention will be described below with reference to the drawings.
図は本発明による光ディスクの一実施例を示す断面図で
あって、１はプラスチック基板、１ａは記録面、１ｂは
光ビーム照射面、２は記録膜、３は保護膜である。The figure is a sectional view showing an embodiment of the optical disc according to the present invention, in which 1 is a plastic substrate, 1a is a recording surface, 1b is a light beam irradiation surface, 2 is a recording film, and 3 is a protective film.
同図において、プラスチック基板１は、たとえばＰＣ，
ＰＭＭＡなどの熱可塑性樹脂もしくはエポキシ樹脂など
の熱硬化性樹脂からなり、その一方の面１ａはビット列
からなる螺旋状もしくは同心円状のトラックが形成され
た記録面である。この記録面１ａには記録層２が設けら
れている。In the figure, the plastic substrate 1 is, for example, a PC,
It is made of thermoplastic resin such as PMMA or thermosetting resin such as epoxy resin, and one surface 1a thereof is a recording surface on which spiral or concentric tracks consisting of bit strings are formed. A recording layer 2 is provided on this recording surface 1a.
プラスチック基板１の他方の面１ｂは光ビームが照射さ
れる面であり、この光ビーム照射面１ｂに保護膜３が設
けられている。この保護膜３は溶剤型紫外線硬化樹脂か
らなり、高硬度でプラスチック基板１に比べて帯電防止
効果が優れている。The other surface 1b of the plastic substrate 1 is a surface onto which a light beam is irradiated, and a protective film 3 is provided on this light beam irradiation surface 1b. This protective film 3 is made of a solvent-based ultraviolet curing resin, has high hardness, and has a superior antistatic effect compared to the plastic substrate 1.
これによって光ビーム照射面ｌｂ側の耐傷性が向上し、
帯電による塵芥などの付着を防止できるし、溶剤によっ
て浸食されることはない。This improves the scratch resistance on the light beam irradiation surface lb side,
It can prevent the adhesion of dust and other substances due to electrification, and it will not be eroded by solvents.
溶剤型紫外線硬化樹脂は、上記のように、機械的強度の
点で優れているが、これを保護膜３として用いる場合、
紫外線照射による硬化時での収縮率が小さくなければな
らない（１５％程度以下）し、形成された被膜のプラス
チック基板１との密着性が良好で、かつ屈折率や熱膨張
率がプラスチック基Ｆｉ１と同程度で、溶剤に浸食され
ないものでなければならない。これらの条件を満足する
溶剤型紫外線硬化樹脂としては保護膜材料をトルエン、
アセトン、メチルエチルケトン、メチルアルコール、エ
チルアルコール、プロピルアルコールなどのいずれか１
種類の溶剤あるいは２種類以上の混合溶剤に溶解したも
のを用いるが、プラスチック基板１の材料によって異な
り、溶剤を選択して用いなければならない。ここで、そ
の−具体例を示すと、プラスチック基板１をＰＣからな
るものとした場合、保護膜３として上記諸条件を満す溶
剤型紫外線硬化樹脂はスリーボンド社のＵＶＸ−ＨＭ・
１８５−２がある。Solvent-type ultraviolet curing resin has excellent mechanical strength as described above, but when using it as the protective film 3,
The shrinkage rate during curing by ultraviolet irradiation must be small (approximately 15% or less), the formed film must have good adhesion to the plastic substrate 1, and the refractive index and thermal expansion coefficient must be similar to that of the plastic base Fi1. It must be of similar quality and not eroded by solvents. Solvent-type UV-curable resins that satisfy these conditions include toluene,
Any one of acetone, methyl ethyl ketone, methyl alcohol, ethyl alcohol, propyl alcohol, etc.
A solvent dissolved in different types of solvent or a mixed solvent of two or more types is used, but it depends on the material of the plastic substrate 1, and the solvent must be selected and used. Here, to give a specific example, when the plastic substrate 1 is made of PC, the solvent-based ultraviolet curing resin that satisfies the above conditions as the protective film 3 is UVX-HM manufactured by ThreeBond.
There is 185-2.
次に、この溶剤型紫外線硬化樹脂を保護膜３とした光デ
ィスクの保護膜形式方法および性能について説明する。Next, the method and performance of the protective film of an optical disc using this solvent-based ultraviolet curable resin as the protective film 3 will be explained.
まず、保護膜形成方法については、ＰＣからなるプラス
チック基板の光ビーム照射面に、スピンコード法により
、溶剤型紫外線硬化樹脂（先のＵＶＸ−ＨＭ ・１８５
−２）を３〜５μｍの厚さで塗布し、８０°Ｃの雰囲気
内で１分間予備乾燥を行なった後（これによって溶剤を
除＜）、１５０ｍ Ｗ ／ ｃ＋＋！の紫外線を１０秒
間照射して溶剤型紫外線硬化樹脂を硬化させる。これに
よって保護膜が得られる。First, regarding the protective film formation method, a solvent-based ultraviolet curable resin (UVX-HM 185) was applied to the light beam irradiation surface of a plastic substrate made of PC using a spin code method.
-2) in a thickness of 3-5 μm and after pre-drying for 1 minute in an atmosphere at 80 °C (thereby removing the solvent), 150 m W/c++! The solvent type ultraviolet curable resin is cured by irradiating it with ultraviolet rays for 10 seconds. This provides a protective film.
このようにして形成された保護膜に対して、次のように
、各種の試験を行なったところ極めて良好な結果が得ら
れた。When the protective film thus formed was subjected to various tests as described below, very good results were obtained.
保護膜を１００区分にカッティングし、セロハンテープ
でこれらを引き剥がすクロスハツチ試験（１００／１０
０）を行なったが、剥がれる部分は全くなかった。この
ように、ＰＣ基板との密着性は極めて良好であった。ま
た、温度が６０℃、湿度が９０％の雰囲気中に１０００
時間以上、温度が０℃で湿度が０％の雰囲気中に５００
時間以上放置する環境試験に対しても、密着性の変化は
みられなかった。Cross hatch test (100/10) in which the protective film is cut into 100 sections and these are peeled off with cellophane tape
0), but there was no peeling at all. Thus, the adhesion to the PC board was extremely good. In addition, 1000
500°C in an atmosphere with a temperature of 0°C and a humidity of 0% for more than an hour.
No change in adhesion was observed even in an environmental test in which the film was left for more than an hour.
２００ｇの荷重をかけて保護膜の表面を５０００回擦す
４スチールウール（＃００００）試験を行なったが、そ
の表面には全く傷がつかなかった。これにより、保護膜
は充分高い耐擦傷性を有していることがわかる。A 4 steel wool (#0000) test was conducted in which the surface of the protective film was rubbed 5000 times under a load of 200 g, but the surface was not scratched at all. This shows that the protective film has sufficiently high scratch resistance.
収縮に伴なうリターデーション変化（複屈折）の測定を
行なったが、リターデーションは数ｎｍ増加しただけで
問題はなかった。また、保護膜の光線透過率（透明度）
はＰＣ基板と同程度であった。The change in retardation (birefringence) due to contraction was measured, but the retardation increased by only a few nanometers without any problem. In addition, the light transmittance (transparency) of the protective film
was about the same as that of a PC board.
２時間サイクルで一４０℃〜＋９０℃の変化を行ない、
これを２５０回繰り返えす熱サイクル試験を行なったが
、密着性、リターデーションに変化はなかったし、保護
膜にクラックは全く生じなかった。また、耐溶剤試験を
行なったが、保護膜は用いた全ての溶剤に浸食されなか
った。Change the temperature from -40℃ to +90℃ in a 2-hour cycle,
A thermal cycle test was conducted in which this process was repeated 250 times, but there was no change in adhesion or retardation, and no cracks occurred in the protective film. A solvent resistance test was also conducted, but the protective film was not corroded by any of the solvents used.
以上のように、ＰＣからなるプラスチック基板の光ビー
ム照射面側での保護膜としては、上記の溶剤型紫外線硬
化樹脂（ＵＶＸ−ＨＭ・１８５−２）が好適である。こ
の溶剤型紫外線硬化樹脂をＰＣ基板に塗布したとき、そ
の溶剤がＰＣ基板の表面を溶解し、紫外線硬化樹脂がＰ
Ｃ基板に侵入するいわゆるアンカー効果が止し、これに
よってＰＣ基板と形成された保護膜との密着性が良好な
のである。また、この溶剤型紫外線硬化樹脂は親水性官
能基を存しており、透水率がＰＣ基板よりも適度に大き
い。この結果、ＰＣ基板との界面で水が留まってＰＣ基
板から剥離してしまうようなことがなく、これによって
もＰＣ基板との密着性が良好となるし、また、ＰＣ基板
に比べて帯電防止効果も得られることになる。As described above, the above-mentioned solvent-based ultraviolet curing resin (UVX-HM 185-2) is suitable as a protective film on the light beam irradiation surface side of a plastic substrate made of PC. When this solvent-based UV-curable resin is applied to a PC board, the solvent dissolves the surface of the PC board, and the UV-curable resin becomes P.
The so-called anchor effect that invades the PC board is stopped, and as a result, the adhesion between the PC board and the formed protective film is good. Moreover, this solvent-type ultraviolet curable resin has a hydrophilic functional group and has a water permeability that is moderately higher than that of a PC board. As a result, water does not stay at the interface with the PC board and peel off from the PC board, which also results in better adhesion to the PC board, and it is also more antistatic than a PC board. Effects will also be obtained.
以上説明したように、本発明によれば、プラスチック基
板の光ビーム照射面側の耐傷性が大幅に改善されること
はもちろんのこと、保護膜の該プラスチック基板に対す
る密着性、耐擦傷性、収縮率、透明度も優れているし、
保護膜自体も耐溶剤性に優れ、しかも、該保護膜は極め
て短時間で形成できることから、優れた性能を保持でき
る光ディスクの生産性が大幅に向上するという効果を得
ることができる。As explained above, according to the present invention, not only the scratch resistance of the light beam irradiated side of the plastic substrate is significantly improved, but also the adhesion of the protective film to the plastic substrate, the scratch resistance, and the shrinkage resistance. The rate and transparency are also excellent,
Since the protective film itself has excellent solvent resistance and can be formed in an extremely short time, it is possible to obtain the effect that the productivity of optical discs that can maintain excellent performance is greatly improved.
図は本発明による光ディスクの一実施例を示す断面図で
ある。
■・・・・・・プラスチック基板、１ａ・・・・・・記
録面、１ｂ・・・・・・光ビーム照射面、２・・・・・
・記録膜、３・・・・・・保護膜。The figure is a sectional view showing an embodiment of an optical disc according to the present invention. ■...Plastic substrate, 1a...Recording surface, 1b...Light beam irradiation surface, 2...
- Recording film, 3...Protective film.
Claims (1)
側に溶剤型紫外線硬化樹脂からなる保護膜を設けたこと
を特徴とする光ディスク。An optical disc characterized in that a protective film made of a solvent-based ultraviolet curing resin is provided on at least the side of a transparent plastic substrate irradiated with a light beam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62019637A JPH07109657B2 (en) | 1987-01-31 | 1987-01-31 | Light disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62019637A JPH07109657B2 (en) | 1987-01-31 | 1987-01-31 | Light disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63188837A true JPS63188837A (en) | 1988-08-04 |
| JPH07109657B2 JPH07109657B2 (en) | 1995-11-22 |
Family
ID=12004730
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62019637A Expired - Lifetime JPH07109657B2 (en) | 1987-01-31 | 1987-01-31 | Light disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07109657B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5013594A (en) * | 1987-09-25 | 1991-05-07 | Hitachi Maxwell, Ltd. | Optical information recording medium and its production |
| US7008682B2 (en) | 2003-03-07 | 2006-03-07 | Tdk Corporation | Optical disc and method for manufacturing the same |
| US7008683B2 (en) | 2003-03-07 | 2006-03-07 | Tdk Corporation | Optical disc and method for manufacturing the same |
| US7014902B2 (en) | 2003-03-07 | 2006-03-21 | Tdk Corporation | Optical disc and method for manufacturing the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57113432A (en) * | 1981-01-06 | 1982-07-14 | Mitsubishi Rayon Co Ltd | Base plate for video or audio disk |
| JPS6057552A (en) * | 1983-09-07 | 1985-04-03 | Fuji Photo Film Co Ltd | Laser recording medium |
| JPS6145437A (en) * | 1984-08-08 | 1986-03-05 | Hitachi Ltd | Optical recording medium |
| JPS61120360A (en) * | 1984-11-15 | 1986-06-07 | Hitachi Chem Co Ltd | Optical disk |
| JPS61153844A (en) * | 1984-12-27 | 1986-07-12 | Fuji Photo Film Co Ltd | Information recording medium |
| JPS637531A (en) * | 1986-06-25 | 1988-01-13 | Dainippon Printing Co Ltd | Protective film for optical information recording medium |
-
1987
- 1987-01-31 JP JP62019637A patent/JPH07109657B2/en not_active Expired - Lifetime
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57113432A (en) * | 1981-01-06 | 1982-07-14 | Mitsubishi Rayon Co Ltd | Base plate for video or audio disk |
| JPS6057552A (en) * | 1983-09-07 | 1985-04-03 | Fuji Photo Film Co Ltd | Laser recording medium |
| JPS6145437A (en) * | 1984-08-08 | 1986-03-05 | Hitachi Ltd | Optical recording medium |
| JPS61120360A (en) * | 1984-11-15 | 1986-06-07 | Hitachi Chem Co Ltd | Optical disk |
| JPS61153844A (en) * | 1984-12-27 | 1986-07-12 | Fuji Photo Film Co Ltd | Information recording medium |
| JPS637531A (en) * | 1986-06-25 | 1988-01-13 | Dainippon Printing Co Ltd | Protective film for optical information recording medium |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5013594A (en) * | 1987-09-25 | 1991-05-07 | Hitachi Maxwell, Ltd. | Optical information recording medium and its production |
| US7008682B2 (en) | 2003-03-07 | 2006-03-07 | Tdk Corporation | Optical disc and method for manufacturing the same |
| US7008683B2 (en) | 2003-03-07 | 2006-03-07 | Tdk Corporation | Optical disc and method for manufacturing the same |
| US7014902B2 (en) | 2003-03-07 | 2006-03-21 | Tdk Corporation | Optical disc and method for manufacturing the same |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07109657B2 (en) | 1995-11-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2517341B2 (en) | Method for manufacturing optical information recording disk | |
| JP3911728B2 (en) | Resin composition for protective coating and adhesion of digital video disk | |
| JPS63188837A (en) | Optical disk | |
| JPH03113744A (en) | Optical memory element | |
| JPH01119934A (en) | Optical disk | |
| KR20030018272A (en) | Optical recording medium | |
| JPS6116815A (en) | Manufacture of optical disk substrate | |
| JPH0229952A (en) | Substrate for information recording medium and its production | |
| JP2004136692A (en) | Method of manufacturing in bulk the third shaping die of metal, method of manufacturing resin substrate, and resin substrate | |
| JPH0474688A (en) | Optical recording medium | |
| JPH0411337A (en) | Optical disk | |
| JPH0443332B2 (en) | ||
| JPS63251924A (en) | Disk and method for information recording | |
| US20050101688A1 (en) | Polymeric material applicable for making data-recording layer or multi-layer recording medium | |
| JPH05166326A (en) | Optical disk | |
| JPS6370945A (en) | Optical recording medium | |
| JP2000251335A (en) | Production of optical information recording medium | |
| JPH0395737A (en) | Optical information recording medium | |
| JP3050394B2 (en) | Optical information recording medium | |
| JPH01232552A (en) | Optical disk substrate | |
| JPH06195763A (en) | Stamper with back member and its manufacture | |
| JPH04141838A (en) | Optical recording medium | |
| JPH03248341A (en) | Optical disk substrate | |
| JPH04181528A (en) | Optical recording medium | |
| JPH06282877A (en) | Optical disk |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |