JPS63124244A - Optical disk - Google Patents
Optical diskInfo
- Publication number
- JPS63124244A JPS63124244A JP61270272A JP27027286A JPS63124244A JP S63124244 A JPS63124244 A JP S63124244A JP 61270272 A JP61270272 A JP 61270272A JP 27027286 A JP27027286 A JP 27027286A JP S63124244 A JPS63124244 A JP S63124244A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- substrate
- film
- recording film
- light incidence
- 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 28
- 229920005989 resin Polymers 0.000 claims abstract description 38
- 239000011347 resin Substances 0.000 claims abstract description 38
- 239000000758 substrate Substances 0.000 claims abstract description 37
- 229920002492 poly(sulfone) Polymers 0.000 claims abstract description 7
- 239000004721 Polyphenylene oxide Substances 0.000 claims description 5
- 239000004695 Polyether sulfone Substances 0.000 claims description 4
- 239000004734 Polyphenylene sulfide Substances 0.000 claims description 4
- 229920001230 polyarylate Polymers 0.000 claims description 4
- 229920006393 polyether sulfone Polymers 0.000 claims description 4
- 229920001721 polyimide Polymers 0.000 claims description 4
- 239000009719 polyimide resin Substances 0.000 claims description 4
- 229920006380 polyphenylene oxide Polymers 0.000 claims description 4
- 229920000069 polyphenylene sulfide Polymers 0.000 claims description 4
- 238000002844 melting Methods 0.000 claims description 3
- RTZKZFJDLAIYFH-UHFFFAOYSA-N ether Substances CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 1
- -1 ether ketone Chemical class 0.000 claims 1
- 229920000570 polyether Polymers 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 8
- 239000003822 epoxy resin Substances 0.000 abstract description 6
- 229920000647 polyepoxide Polymers 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 238000000465 moulding Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 10
- 239000011521 glass Substances 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 230000005293 ferrimagnetic effect Effects 0.000 description 5
- 239000011253 protective coating Substances 0.000 description 5
- 229910052723 transition metal Inorganic materials 0.000 description 5
- 229920005992 thermoplastic resin Polymers 0.000 description 4
- 239000004696 Poly ether ether ketone Substances 0.000 description 3
- 229920002530 polyetherether ketone Polymers 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010365 information processing Effects 0.000 description 2
- 230000001678 irradiating effect Effects 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- 230000003685 thermal hair damage Effects 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 229920000178 Acrylic resin Polymers 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 229910001215 Te alloy Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 239000004811 fluoropolymer Substances 0.000 description 1
- 229920002313 fluoropolymer Polymers 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000004850 liquid epoxy resins (LERs) Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 150000004767 nitrides Chemical class 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920005668 polycarbonate resin Polymers 0.000 description 1
- 239000004431 polycarbonate resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229910052761 rare earth metal Inorganic materials 0.000 description 1
- 150000002910 rare earth metals Chemical class 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052714 tellurium Inorganic materials 0.000 description 1
- PORWMNRCUJJQNO-UHFFFAOYSA-N tellurium atom Chemical compound [Te] PORWMNRCUJJQNO-UHFFFAOYSA-N 0.000 description 1
- 150000003624 transition metals Chemical class 0.000 description 1
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、レーザ光等の光を用いて情報の記録再生を行
なう光ディスクに関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an optical disc on which information is recorded and reproduced using light such as a laser beam.
従来の技術
近年、情報処理システムにおける処理情報量の急速な増
加に伴い、特に画像情報処理システムおよびオフィスオ
ートメーション等の分野において記録容量の大きい記録
媒体、とりわけ光ディスクが注目されている。光ディス
クでは、記録膜上に光ビームを照射し、光吸収による局
部的な温度上昇あるいは化学変化を誘起して記録を行な
う。2. Description of the Related Art In recent years, with the rapid increase in the amount of information processed in information processing systems, recording media with large recording capacities, especially optical discs, have been attracting attention, particularly in the fields of image information processing systems and office automation. In an optical disc, recording is performed by irradiating a light beam onto a recording film to induce a local temperature rise or chemical change due to light absorption.
従来の光ディスクは、例えば第３図に示すように構成さ
れている。すなわち、トラッキング溝が形成されたプラ
スチック、ガラス等の透明基板３１上に、基板の熱損傷
防止あるいは記録特性の改善のための下地層３２を形成
し、この下地層の上に記録膜３３として希土類−遷移金
属系フエリ磁性膜、テルル系合金膜、熱可塑性樹脂膜等
を形成し、保護被覆用基板３４を接着剤３６によって接
着した構造になっている。A conventional optical disc is configured as shown in FIG. 3, for example. That is, a base layer 32 is formed on a transparent substrate 31 made of plastic, glass, etc., on which tracking grooves are formed, to prevent thermal damage to the substrate or to improve recording characteristics, and a rare earth film 33 is formed on this base layer. - It has a structure in which a transition metal-based ferrimagnetic film, a tellurium-based alloy film, a thermoplastic resin film, etc. are formed, and a protective coating substrate 34 is bonded with an adhesive 36.
光デイスク表面のじんあいによる記録再生特性の劣化を
防止するために、記録再生は前記光ディスクのトラッキ
ング溝付透明基板側よシレーザ光等の光ビームを記録膜
に照射して行なう。この時、透明基板の光入射端で光ビ
ーム径を充分大きくし、じんあいによる影響を除くため
に透明基板の厚さは１１１１ｍ前後に設定される。In order to prevent deterioration of recording and reproducing characteristics due to dust on the surface of the optical disk, recording and reproducing are performed by irradiating the recording film with a light beam such as a laser beam from the side of the transparent substrate with tracking grooves of the optical disk. At this time, the thickness of the transparent substrate is set to about 1111 m in order to make the light beam diameter sufficiently large at the light incident end of the transparent substrate and to eliminate the influence of dust.
また、透明基板上に下境層、記録膜を形成したもの２枚
を記録膜が向い合うように接着剤で貼り合わせ、両面に
おいて記録可能な構造として用いる場合もある。Alternatively, two transparent substrates each having a lower layer and a recording film formed thereon may be bonded together with an adhesive so that the recording films face each other, and used as a structure in which recording can be performed on both sides.
発明が解決しようとする問題点
しかしながら、前記のような構成の光ディスクでは光入
射用の透明基板自身にトラッキング溝が形成されている
ため、透明基板は光学特性、耐湿性、耐熱性に加えて溝
成形性に優れていることが要求され、そのような要求を
充分に満たす透明基板が得られていない。また、光ディ
スクの量産性を向上し、コストを低下させるためには、
基板への成膜時間を短縮して生産性を上げる必要がある
。Problems to be Solved by the Invention However, in the optical disk having the above structure, tracking grooves are formed on the transparent substrate itself for light incidence. Excellent moldability is required, and a transparent substrate that fully satisfies such requirements has not been obtained. In addition, in order to improve the mass production of optical discs and reduce costs,
It is necessary to increase productivity by shortening the time required to form a film on a substrate.
基板への成膜時間は、基板の耐熱性によって制限される
ため、従来の耐熱温度１２０°Ｃ以下の樹脂を基板とし
て用いた場合は生産性に限界があった。すなわち、従来
の光ディスクの溝付透明基板として用いられているアク
リル樹脂の場合は溝成形性、光学特性生産性に優れてい
るが耐湿性。The time required to form a film on a substrate is limited by the heat resistance of the substrate, so when a conventional resin with a heat resistance temperature of 120° C. or lower is used as a substrate, there is a limit to productivity. In other words, the acrylic resin used as the grooved transparent substrate of conventional optical discs has excellent groove moldability and optical property productivity, but is moisture resistant.
耐熱性に劣っておシ、ポリカーボネイト樹脂の場合は耐
熱性、溝成形性生産性に優れているが、複屈折などの光
学特性に劣っており、エポキシ樹脂およびガラスの場合
は光学特性、耐熱性に優れているが、溝成形性、生産性
に劣っているという問題点を有していた。Polycarbonate resin has excellent heat resistance, groove moldability, and productivity, but it has poor optical properties such as birefringence, and epoxy resin and glass have poor optical properties and heat resistance. However, it had the problem of being inferior in groove formability and productivity.
本発明は上記問題点に鑑み、光学特性、耐湿性。In view of the above problems, the present invention has been developed to improve optical properties and moisture resistance.
耐熱性、溝成形性、生産性に優れた光ディスクを提供す
るものである。The present invention provides an optical disc with excellent heat resistance, groove formability, and productivity.
問題点を解決するための手段
この目的を達成するために本発明の光ディスクは、記録
膜の形成される溝付基板と光入射用の透明板を別に設け
てそれぞれ機能分担させ、溝付基板として耐熱温度が１
５０°Ｃ以上の成形可能な材料であるポリイミド系樹脂
、ポリフェニレンオキシド樹脂、ポリエーテルサルホン
樹脂、ボリフェニレンサルフフイド樹脂、°ポリアリレ
ート樹脂。Means for Solving the Problems In order to achieve this object, the optical disc of the present invention has a grooved substrate on which a recording film is formed and a transparent plate for light incidence, which are separately provided to share their functions. Heat resistant temperature is 1
Polyimide resins, polyphenylene oxide resins, polyether sulfone resins, polyphenylene sulfide resins, and polyarylate resins are materials that can be molded at temperatures of 50°C or higher.
ポリサルホン樹脂、ポリエーテルエーテルケトン樹脂、
熱溶融ふっ素系樹脂、ポリオキシベンゾイル樹脂のいず
れかを含有する構成になっている。polysulfone resin, polyetheretherketone resin,
It has a structure containing either a hot melt fluororesin or a polyoxybenzoyl resin.
作用
耐熱性に優れ、成形が比較的容易であるポリイミド系樹
脂、ポリフェニレンオキシド樹脂、ポリエーテルサルホ
ン樹脂、ポリフェニレンサルフフイド樹脂、ポリアリレ
ート樹脂、ポリサルホン樹脂、ポリエーテルエーテルケ
トン樹脂、熱溶融ふっ素系樹脂、ポリオキシベンゾイル
樹脂のいずれかを記録膜形成用溝付基板として用い、複
屈折などの光学特性、耐湿性に優れた材料（例えば、エ
ポキン樹脂、シリコーン樹脂、ガラスなど）を光入射用
の透明板として用いることによって機能分担させ、高品
質で量産性に優れた光ディスクを実現するものである。Polyimide resin, polyphenylene oxide resin, polyether sulfone resin, polyphenylene sulfide resin, polyarylate resin, polysulfone resin, polyether ether ketone resin, heat-melting fluorine resin, which has excellent heat resistance and is relatively easy to mold. Either resin or polyoxybenzoyl resin is used as the grooved substrate for forming the recording film, and a material with excellent optical properties such as birefringence and moisture resistance (e.g., Epoquine resin, silicone resin, glass, etc.) is used as the grooved substrate for forming the recording film. By using it as a transparent plate, functions can be shared and optical discs of high quality and excellent in mass production can be realized.
実施例
以下、本発明の一実施例について、図面を参照しながら
説明する。第１図は本発明の一実施例における光ディス
クの構成図である。第１図において、１１はポリサルホ
ン樹脂からなる記録膜形成用溝付基板、１２は下地層お
よび保護被覆層としてのＳｉＯ膜、１３は記録膜として
のＴｂＦｅ 、 ＧｄＴｂＦｅ 。EXAMPLE Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram of an optical disc in one embodiment of the present invention. In FIG. 1, 11 is a grooved substrate for forming a recording film made of polysulfone resin, 12 is a SiO film as a base layer and a protective coating layer, and 13 is a TbFe, GdTbFe film as a recording film.
ＴｂＦａＣｏなどの希土類−遷移金属系フェリ磁性膜、
１４はエポキシ樹脂の光入射用透明板である。Rare earth-transition metal ferrimagnetic film such as TbFaCo,
14 is a transparent plate for light incidence made of epoxy resin.
ポリサルホン樹脂の記録膜形成用溝付基板１１上に蒸着
法およびスパッタ法によ＃）ＳｉＯ膜１２（３０〜２ｏ
ｏｎｍ）、希土類−遷移金属系フェリ磁性膜１ｓ（１ｏ
ｏｎｍ）、ＳｉＯ膜１２（３０〜２ｏｏｎｍ） の順
に形成後、透明液状のエポキシ樹脂を光入射側の厚さが
１〜１．２ｍｍ程度になるよう平板状に成形固化させた
構成になっている。A SiO film 12 (30 to 2
onm), rare earth-transition metal ferrimagnetic film 1s (1o
After forming a SiO film 12 (30 to 2 mm) in this order, a transparent liquid epoxy resin is molded and solidified into a flat plate with a thickness of about 1 to 1.2 mm on the light incident side. .
第１図に示した本実施例による光ディスクは、溝付基板
に高耐熱性の熱可塑性樹脂であるポリサルホン樹脂を用
いているので、スパッタ法による記録膜形成時に溝付基
板の熱損傷なしに高速製膜が可能で量産性に優れるとと
もに、ターゲットと基板の間の距離を短かくできるため
製膜時の材料の収率が向上できる。一方、光投入側に複
屈折が小さく、耐湿性の良いエポキシ樹脂を用いている
ので信号品質、信頼性に優れている。The optical disk according to this embodiment shown in FIG. 1 uses polysulfone resin, which is a highly heat-resistant thermoplastic resin, for the grooved substrate, so it can be used at high speed without thermal damage to the grooved substrate during the formation of a recording film by sputtering. It is possible to form a film and has excellent mass productivity, and because the distance between the target and the substrate can be shortened, the material yield during film formation can be improved. On the other hand, since epoxy resin with low birefringence and good moisture resistance is used on the light input side, signal quality and reliability are excellent.
これによって、従来の光ディスクに比較して生産性が１
．５倍向上するとともに、製膜時の材料の収率も５０％
改善されて大幅なコスト低減が可能となる。This increases productivity by 10% compared to conventional optical discs.
．． 5x improvement and 50% material yield during film formation
This improvement will enable significant cost reductions.
なお、本実施例では記録膜形成用溝付基板をポリサルホ
ン樹脂、下地層および保護被覆層をＳｉＯ膜、記録膜を
希土類−遷移金属系フェリ磁性膜、光入射用透明板をエ
ポキシ樹脂としたが、記録膜形成用溝付基板はポリイミ
ド系樹脂、ポリフェニレンオキシド樹脂、ポリエーテル
サルホン樹脂。In this example, the grooved substrate for forming the recording film was made of polysulfone resin, the underlayer and protective coating layer were made of SiO film, the recording film was made of rare earth-transition metal ferrimagnetic film, and the transparent plate for light incidence was made of epoxy resin. The grooved substrate for recording film formation is made of polyimide resin, polyphenylene oxide resin, or polyether sulfone resin.
ポリフェニレンサルファイド樹脂、ポリアリレート樹脂
、ポリエーテルエーテルケトン樹脂、熱溶融ふっ素光樹
脂、ポリオキシベンゾイル樹脂のうちいずれか、下地層
および保護被覆層は各種の窒化膜や酸化膜、記録膜はテ
ルル系合金膜または熱可塑性樹脂膜、光入射用透明板は
光入射側の厚さが０．８〜１．６ｍｍの範囲で材質がシ
リコーン樹脂。Polyphenylene sulfide resin, polyarylate resin, polyether ether ketone resin, heat-melting fluoropolymer resin, polyoxybenzoyl resin, base layer and protective coating layer are various nitride films or oxide films, recording film is tellurium alloy The film or thermoplastic resin film and the transparent plate for light incidence have a thickness in the range of 0.8 to 1.6 mm on the light incidence side and are made of silicone resin.
ポリエステル系樹脂、ガラスなどでもよい。ガラスを光
入射用透明板とした場合は、記録膜および溝付基板を両
側からガラスで挟む形にエポキシ系接着剤で接着するか
、ハーメチックシールなどの方法で封着する。Polyester resin, glass, etc. may also be used. When glass is used as the transparent plate for light incidence, the recording film and the grooved substrate are sandwiched between the glasses from both sides and are bonded with an epoxy adhesive or sealed by a method such as a hermetic seal.
また、第２図のような構造で両面記録再生可能な光ディ
スクとすることもできる。Further, an optical disc having a structure as shown in FIG. 2 and capable of double-sided recording and reproduction can also be provided.
発明の効果
本発明は、記録膜形成用の溝付基板と光入射用の透明板
を別に設けることによって機能分担させ、溝付基板とし
て高耐熱性の熱可塑性樹脂を用いるため、高品質で量産
性に優れた光ディスクを実現できるものである。Effects of the Invention The present invention separates the functions by separately providing a grooved substrate for forming a recording film and a transparent plate for light incidence, and uses a highly heat-resistant thermoplastic resin as the grooved substrate, making it possible to mass produce high quality. This makes it possible to realize an optical disc with excellent performance.
第１図は本発明の一実施例における元ディスクの断Ｉ図
、第２図は本発明の他の実施例における光ディスクの断
面図、第３図は従来の光ディスクのｔＩｊＴ面図である
。
１１・・・・・・記録形成用溝付基板、１２・・・・・
・Ｓｉ、（ｌ！、１３・・・・・・希土類−遷移金属系
フェリ磁性膜、１４・・・・・・光入射用エポキシ樹脂
透明板、２１・・・・・・溝付基板、２２・・・・・・
下地層および保護被覆層、２３・・・・・・記録膜、２
４・・・・・・光入射用透明板。
代理人の氏名 弁理士 中 尾 敏 男 ほか１名第１
図
合、−就FIG. 1 is a cross-sectional view of an original disk according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of an optical disk according to another embodiment of the present invention, and FIG. 3 is a tIjT plane view of a conventional optical disk. 11... Grooved substrate for recording formation, 12...
・Si, (l!, 13... Rare earth-transition metal ferrimagnetic film, 14... Epoxy resin transparent plate for light incidence, 21... Grooved substrate, 22・・・・・・
Base layer and protective coating layer, 23...Recording film, 2
4...Transparent plate for light incidence. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure, - position
Claims (1)
記録膜に対して前記基板の反対側、あるいは前記基板と
前記記録膜を包囲するように透明板を設け、前記記録膜
に対して前記基板の反対側から光を入射して記録再生を
行なえるように構成するとともに、前記基板はポリイミ
ド系樹脂、ポリフェニレンオキシド樹脂、ポリエーテル
サルホン樹脂、ポリフェニレンサルファイド樹脂、ポリ
アリレート樹脂、ポリサルホン樹脂、ポリエーテルエー
テルケトン樹脂、熱溶融ふっ素系樹脂、ポリオキシベン
ゾイル樹脂のうちいずれかを含有することを特徴とする
光ディスク。A recording film is formed on a substrate having a tracking groove, a transparent plate is provided on the opposite side of the substrate with respect to the recording film, or so as to surround the substrate and the recording film, and the transparent plate is provided on the opposite side of the substrate with respect to the recording film, and The substrate is made of polyimide resin, polyphenylene oxide resin, polyether sulfone resin, polyphenylene sulfide resin, polyarylate resin, polysulfone resin, polyether resin, etc. An optical disc characterized by containing any one of an ether ketone resin, a heat-melting fluororesin, and a polyoxybenzoyl resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61270272A JPS63124244A (en) | 1986-11-13 | 1986-11-13 | Optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61270272A JPS63124244A (en) | 1986-11-13 | 1986-11-13 | Optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63124244A true JPS63124244A (en) | 1988-05-27 |
Family
ID=17483938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61270272A Pending JPS63124244A (en) | 1986-11-13 | 1986-11-13 | Optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63124244A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0294146A (en) * | 1988-09-30 | 1990-04-04 | Ricoh Co Ltd | Magneto-optical recording medium |
| JPH0778373A (en) * | 1992-12-31 | 1995-03-20 | Internatl Business Mach Corp <Ibm> | Double-sided magneto-optic disk and direct overriding method and device of double-sided magneto-optic disk |
| US7300690B2 (en) | 2001-03-29 | 2007-11-27 | General Electric Company | Radial tilt reduced media |
-
1986
- 1986-11-13 JP JP61270272A patent/JPS63124244A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0294146A (en) * | 1988-09-30 | 1990-04-04 | Ricoh Co Ltd | Magneto-optical recording medium |
| JPH0778373A (en) * | 1992-12-31 | 1995-03-20 | Internatl Business Mach Corp <Ibm> | Double-sided magneto-optic disk and direct overriding method and device of double-sided magneto-optic disk |
| US7300690B2 (en) | 2001-03-29 | 2007-11-27 | General Electric Company | Radial tilt reduced media |
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