JPS60129948A - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPS60129948A JPS60129948A JP58236832A JP23683283A JPS60129948A JP S60129948 A JPS60129948 A JP S60129948A JP 58236832 A JP58236832 A JP 58236832A JP 23683283 A JP23683283 A JP 23683283A JP S60129948 A JPS60129948 A JP S60129948A
- Authority
- JP
- Japan
- Prior art keywords
- supporter
- transparent substrate
- support
- substrate
- recording medium
- 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
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
[発明の技術分野]
この発明は光記録媒体に係り、さらJ詳しくは支持体と
記録層を形成した透明基板との間に所定の間隙を有する
光記録媒体に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an optical recording medium, and more particularly to an optical recording medium having a predetermined gap between a support and a transparent substrate on which a recording layer is formed.
[発明の技術的背景とその問題点]
光記録媒体は大量の情報を記録することが可能であって
、永久または半永久的に情報を保存でき、またオンライ
ンでアクセスすることが可能であるなどの特長を有する
ことから、大容量ディスクメモリとして大いに注目され
ている。[Technical background of the invention and its problems] Optical recording media are capable of recording large amounts of information, can store information permanently or semi-permanently, and can be accessed online. Because of its unique features, it is attracting a lot of attention as a large-capacity disk memory.
光記録媒体は通常、第1図に示すような構造となってい
る。すなわち支持体1と、記録層3を片面に形成した透
明基板2とを記録層3を内側にして相対向させ、これら
支持体1および基板2を外周部と内周部にスペーサ4a
、’4bをそれぞれ介して接着固定し、両者間に間隙5
を形成した構造である。ここで、記録層3は透明基板2
側からレーザビームのような光が照射されることによっ
て、情報を凹凸やビット形成等の光学的に読取り可能な
状態変化として記録するものである。Optical recording media usually have a structure as shown in FIG. That is, a support 1 and a transparent substrate 2 having a recording layer 3 formed on one side are placed facing each other with the recording layer 3 inside, and spacers 4a are placed between the support 1 and the substrate 2 on the outer and inner peripheries.
, '4b, respectively, with a gap 5 between them.
This is the structure that formed the . Here, the recording layer 3 is the transparent substrate 2
By being irradiated with light such as a laser beam from the side, information is recorded as optically readable state changes such as unevenness or bit formation.
ところで、このような光記録媒体は高度の平面性および
厚みの均一性が要求されるため、支持体1、基板2と同
様、スペーサ4 a 、 、4 bにも平面性がよく均
一な厚みのものが必要となる。しかしながら、このよう
な高度の加工を要するスペーサはそれ自体の価格が高い
ばがりでなく、媒体組立て時に高精度の位置合せを要し
、媒体の製造工程を複雑化するという問題があった。Incidentally, since such an optical recording medium requires a high level of flatness and uniform thickness, the spacers 4a, 4b, as well as the support 1 and the substrate 2, have good flatness and a uniform thickness. Something is needed. However, spacers that require such sophisticated processing are not only expensive, but also require highly accurate positioning during media assembly, complicating the media manufacturing process.
[発明の目的]
この発明の目的は、支持体と透明基板との間に所定の間
隙が形成され、低コストで製造が容易な光記録媒体を提
供することにある。[Object of the Invention] An object of the invention is to provide an optical recording medium in which a predetermined gap is formed between a support and a transparent substrate, and which is easy to manufacture at low cost.
[発明の概要]
この発明に係わる光記録媒体は、支持体および透明基板
の少なくとも一方に、これらの間に形成すべき間隙を設
定するための突部を一体に形成したことを特徴としてい
る。[Summary of the Invention] The optical recording medium according to the present invention is characterized in that a protrusion for setting a gap to be formed between the support and the transparent substrate is integrally formed on at least one of the support and the transparent substrate.
[発明の効果]
この発明によれば、支持体および透明基板の少なくとも
一方に一体に形成された突部が間隙を設定するためのス
ペーサの役割を果たし、しがもこの突部は支持体や基板
の製作時に同時に形成できるので、スペーサを別設する
場合に比べ加工コストが著しく低減され、また媒体組立
て時におけるスペー サの位置合せといった面倒な作業
も不要となる。従って製造コストが総じて大幅に低減さ
れ、さらに両面に接着剤を塗布する必要のあるスペーサ
を用いた場合に比し接着箇所が少なくなることにより、
機械的強度の向上も期待することができる。[Effects of the Invention] According to the present invention, the protrusion integrally formed on at least one of the support and the transparent substrate plays the role of a spacer for setting a gap, and the protrusion is formed on at least one of the support and the transparent substrate. Since it can be formed at the same time as the substrate is manufactured, the processing cost is significantly reduced compared to the case where spacers are provided separately, and there is no need for troublesome work such as positioning the spacers when assembling the media. Therefore, overall manufacturing costs are significantly reduced, and there are fewer adhesive points than when using spacers that require adhesive to be applied on both sides.
Improvement in mechanical strength can also be expected.
[発明の実施例コ
第2図はこの発明の一実施例の光記録媒体の構造および
製造工程を説明するための断面図である。Embodiment of the Invention FIG. 2 is a sectional view for explaining the structure and manufacturing process of an optical recording medium according to an embodiment of the invention.
図において、支持体11は例えばアクリル等の樹脂で円
形に形成されたもので、その外周部および内周部に所定
の高さの突部11a、11bが一体に形成されている。In the figure, a support 11 is formed of a resin such as acrylic into a circular shape, and protrusions 11a and 11b of a predetermined height are integrally formed on the outer and inner circumferences thereof.
そして、この支持体11に対向して例えば透明アクリル
等からなる円形の透明基板12が設けられ、この基板1
2上に記録層13が形成されている。記録層13はレー
ザビーム等の光の照射により凹凸やビット列等の、光学
的に読取り可能な状態変化を生じるもので、具体例とし
てはTe−c、TeOx等が挙げられる。A circular transparent substrate 12 made of, for example, transparent acrylic is provided opposite to this support 11.
A recording layer 13 is formed on 2. The recording layer 13 causes an optically readable state change, such as unevenness or a bit string, by irradiation with light such as a laser beam, and specific examples include Te-c, TeOx, and the like.
支持体11および透明基板12は記録層13を内側にし
て、突部11a、11bの部分で璋着剤14により接着
される。これによって支持体11と透明基板12との間
に、所定の間隙15が形成される。接着剤14としては
、従来使用されていたエポキシ系あるいはゴム系のもの
では接着に長時間を要する。硬化時の加熱により支持体
や基板を変形させる等の問題があるため、感光性樹脂接
着剤が用いられる。この感光性樹脂接着剤として使用で
きるものとしては、APR(旭化成 商品名)やテビス
ター(帝人 商品名)等の、溶剤を含有しない主として
ビニールエステル樹脂系の液状感光性樹脂が挙げられる
。これらの感光性樹脂は紫外線の照射により硬化すると
ともに優れた粘着性を有し、接着剤として十分に使用で
きるものである。The support 11 and the transparent substrate 12 are bonded together with the adhesive 14 at the protrusions 11a and 11b with the recording layer 13 facing inside. As a result, a predetermined gap 15 is formed between the support body 11 and the transparent substrate 12. As the adhesive 14, conventionally used epoxy or rubber adhesives require a long time for bonding. A photosensitive resin adhesive is used because there are problems such as deformation of the support or substrate due to heating during curing. Examples of photosensitive resin adhesives that can be used include solvent-free liquid photosensitive resins mainly based on vinyl ester resins, such as APR (trade name, manufactured by Asahi Kasei Corporation) and Tevistar (trade name, manufactured by Teijin Corporation). These photosensitive resins are cured by irradiation with ultraviolet rays, have excellent adhesive properties, and can be used satisfactorily as adhesives.
次に、この実施例の光記録媒体の製造工程を説明する。Next, the manufacturing process of the optical recording medium of this example will be explained.
まず支持体11を突部11a、11bとともに射出成型
等により成型した後、第2図(a)に示すように突部1
1a、11bの上に感光性樹脂14を塗布する。次に第
2図(b)に示すように、記録層13をスパッタ、蒸着
等により片面に形成した透明基板12を、記録層13が
支持体11側に位置するように支持体11に対向させて
重ね合せ加圧した後、透明基板12側から紫外線16を
照射することにより、感光性樹脂接着剤14を硬化させ
る。この結果、支持体11と透明基板12とは強固に接
着され、同時に両者間に間隙15が形成されることにな
る。この場合、間隙15の大きさは支持体11に形成し
た突部11a、11bの高さに等しくなる。First, the support body 11 is molded together with the protrusions 11a and 11b by injection molding or the like, and then the protrusions 1
A photosensitive resin 14 is applied on 1a and 11b. Next, as shown in FIG. 2(b), a transparent substrate 12 on which a recording layer 13 is formed on one side by sputtering, vapor deposition, etc. is placed opposite to the support 11 so that the recording layer 13 is located on the support 11 side. After stacking and pressing, the photosensitive resin adhesive 14 is cured by irradiating ultraviolet rays 16 from the transparent substrate 12 side. As a result, the support 11 and the transparent substrate 12 are firmly adhered, and at the same time, a gap 15 is formed between them. In this case, the size of the gap 15 is equal to the height of the protrusions 11a and 11b formed on the support 11.
このように、上記実施例によれば支持体に一体的に形成
した突部によって支持体と透明基板との間の間隙を設定
するため、高精度の加工が要求されるスペーサが不要と
なり、光記録媒体の組立て時に必要な位置合せ等によう
する労力も大きく低減される。また、上記実施例では接
着剤に効果速度の速い感光性樹脂を用いたことにより接
着時間を短縮でき、さらに加熱による支持体や透明基板
の変形を防止できるという利点がある。In this way, according to the above embodiment, since the gap between the support and the transparent substrate is set by the protrusion formed integrally on the support, there is no need for a spacer that requires high-precision processing, and optical The effort required for positioning and the like when assembling the recording medium is also greatly reduced. Further, in the above embodiment, since a photosensitive resin having a fast effect rate is used as the adhesive, the bonding time can be shortened, and furthermore, there is an advantage that deformation of the support and the transparent substrate due to heating can be prevented.
第3図はこの発明の他の実施例を示すもので、透明基板
12に同様な突部12a、12bを一体に形成した点部
外は第2図の実施例と同じであり、同様な効果が(qら
れるものである。FIG. 3 shows another embodiment of the present invention, which is the same as the embodiment shown in FIG. 2 except for the point that similar protrusions 12a and 12b are integrally formed on the transparent substrate 12, and has the same effect. is (q).
この発明はその他要旨を逸脱しない範囲で種々変形実施
が可能であり、例えば支持体および透明基板の両方に、
これらの間の間隙を設定するための突部を形成してもよ
い。また、支持体が紫外線を透過する材質である場合は
、感光性樹脂接着剤の硬化のための紫外線の照射を支持
体側から行なってもよい。さらに、実施例では透明基板
よび記録層が支持体の片面のみに設けられたものを示し
たが、両面に設けられたものにもこの発明を同様に適用
できることは勿論である。This invention can be modified in various ways without departing from the scope of the invention. For example, both the support and the transparent substrate may be
A protrusion may be formed to set a gap between these. Furthermore, when the support is made of a material that transmits ultraviolet rays, irradiation with ultraviolet rays for curing the photosensitive resin adhesive may be performed from the support side. Further, although the embodiments show cases in which the transparent substrate and recording layer are provided on only one side of the support, it goes without saying that the present invention can be similarly applied to cases in which the transparent substrate and recording layer are provided on both sides.
第1図は従来の光記録媒体の構成を示す断面図、第2図
(a)(b)はこの発明の一実施例に係わる光記録媒体
の各工程における断面図、第3図はこの発明の他の実施
例に係わる光記録媒体の断面図である。
11・・・支持体、11a、11b・・・突部、12・
・・透明基板、12a、12b・・・突部、13・・・
記録層、14・・・感光性樹脂接着剤、15・・・間隙
、16・・・紫外線。
出願人代理人 弁理士 鈴江武彦FIG. 1 is a sectional view showing the structure of a conventional optical recording medium, FIGS. 2(a) and 2(b) are sectional views at various steps of an optical recording medium according to an embodiment of the present invention, and FIG. 3 is a sectional view of the present invention. FIG. 3 is a cross-sectional view of an optical recording medium according to another example. 11...Support body, 11a, 11b...Protrusion, 12.
...Transparent substrate, 12a, 12b...Protrusion, 13...
Recording layer, 14... Photosensitive resin adhesive, 15... Gap, 16... Ultraviolet light. Applicant's agent Patent attorney Takehiko Suzue
Claims (3)
する透明基板と、この透明基板の前記支持体側の面上に
形成され光の照射により情報を記録する記録層とを備え
た光記録媒体において、前記支持体および透明基板の少
なくとも一方に、前記間隙を設定するための突部を一体
に形成したことを特徴とする光記録媒体。(1) A support, a transparent substrate facing the support with a predetermined gap therebetween, and a recording layer formed on the surface of the transparent substrate on the support side and recording information by irradiation with light. An optical recording medium, characterized in that a projection for setting the gap is integrally formed on at least one of the support and the transparent substrate.
れらの支持体および透明基板の少なくとも一方の外周部
および内周部に形成されていることを特徴とする特許請
求の範囲第1項記載の光記録媒体。(2) The support body and the transparent substrate are circular, and the protrusion is formed on the outer and inner circumferences of at least one of the support body and the transparent substrate. Optical recording medium described in Section 1.
着剤により接着されていることを特徴とする特許請求の
範囲第1項または第2項記載の光記録媒体。(3) The optical recording medium according to claim 1 or 2, wherein the support and the transparent substrate are bonded to each other at the protrusions using a photosensitive resin adhesive.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58236832A JPS60129948A (en) | 1983-12-15 | 1983-12-15 | Optical recording medium |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58236832A JPS60129948A (en) | 1983-12-15 | 1983-12-15 | Optical recording medium |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60129948A true JPS60129948A (en) | 1985-07-11 |
Family
ID=17006439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58236832A Pending JPS60129948A (en) | 1983-12-15 | 1983-12-15 | Optical recording medium |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60129948A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0246540A (en) * | 1988-08-09 | 1990-02-15 | Toppan Printing Co Ltd | Optical disk |
-
1983
- 1983-12-15 JP JP58236832A patent/JPS60129948A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0246540A (en) * | 1988-08-09 | 1990-02-15 | Toppan Printing Co Ltd | Optical disk |
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