JPS6235171B2 - - Google Patents
Info
- Publication number
- JPS6235171B2 JPS6235171B2 JP56014980A JP1498081A JPS6235171B2 JP S6235171 B2 JPS6235171 B2 JP S6235171B2 JP 56014980 A JP56014980 A JP 56014980A JP 1498081 A JP1498081 A JP 1498081A JP S6235171 B2 JPS6235171 B2 JP S6235171B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesive
- storage medium
- substrate
- information storage
- recording layer
- 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
Links
- 239000000758 substrate Substances 0.000 claims description 23
- 239000010410 layer Substances 0.000 claims description 21
- 238000003860 storage Methods 0.000 claims description 15
- 239000000853 adhesive Substances 0.000 claims description 14
- 230000001070 adhesive effect Effects 0.000 claims description 14
- 125000006850 spacer group Chemical group 0.000 claims description 12
- 239000011241 protective layer Substances 0.000 claims description 11
- 239000004840 adhesive resin Substances 0.000 claims description 2
- 229920006223 adhesive resin Polymers 0.000 claims description 2
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 229920003002 synthetic resin Polymers 0.000 description 5
- 239000000057 synthetic resin Substances 0.000 description 5
- 229920002845 Poly(methacrylic acid) Polymers 0.000 description 3
- 229920002125 Sokalan® Polymers 0.000 description 3
- 239000004584 polyacrylic acid Substances 0.000 description 3
- 125000005907 alkyl ester group Chemical group 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920003217 poly(methylsilsesquioxane) Polymers 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000007740 vapor deposition Methods 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 229920001328 Polyvinylidene chloride Polymers 0.000 description 1
- XTXRWKRVRITETP-UHFFFAOYSA-N Vinyl acetate Chemical compound CC(=O)OC=C XTXRWKRVRITETP-UHFFFAOYSA-N 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- 238000007718 adhesive strength test Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000005033 polyvinylidene chloride Substances 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
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
Landscapes
- Thermal Transfer Or Thermal Recording In General (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】
本発明は、集光したレーザ光により記録層に対
してビツト形成等の状態変化を生じさせることに
より光学的情報を記録し、また、この情報を読取
り得るようにするものであつて、互いに間隔を置
いて２つの記録層が存在する情報記録媒体に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION The present invention records optical information by causing state changes such as bit formation in a recording layer using a focused laser beam, and also makes this information readable. The invention relates to an information recording medium having two recording layers spaced apart from each other.
従来、レーザビームを照射することにより情報
を記録し、また、記録した情報を再生する情報記
憶媒体５は第１図に示すものを挙げることができ
る。すなわち、この情報記憶媒体５は片面に光反
射性材料の記録層１ａ，１ｂをそれぞれ形成した
２枚の円板状をなす合成樹脂製の透明基板２ａ，
２ｂを互いに内側、かつこれらの相対向面間に中
空部分３を有するように内外側スペーサ４ａ，４
ｂを介して重ね合せて形成されている。そして、
前記内外側スペーサ４ａ，４ｂの端部は透明基板
板２ａ，２ｂに接着剤を介して取付けられてい
る。 Conventionally, an information storage medium 5 on which information is recorded by irradiation with a laser beam and on which the recorded information is reproduced is shown in FIG. 1. That is, this information storage medium 5 includes two disc-shaped transparent substrates 2a made of synthetic resin, each of which has a recording layer 1a, 1b made of a light reflective material formed on one side thereof.
The inner and outer spacers 4a, 4 are arranged so that the inner and outer spacers 2b are located inside each other and have a hollow portion 3 between these opposing surfaces.
They are formed by overlapping each other via b. and,
The ends of the inner and outer spacers 4a, 4b are attached to the transparent substrate plates 2a, 2b via an adhesive.
しかしながら、この種のものは、内外側スペー
サの接着する接着剤を透明基板の内外側面に環状
に均一に塗布することがきわめてむずかしく、か
つ多くの時間を必要とし、製造工程が複雑であ
り、製造費用が著しく高くなるなどの欠点があつ
た。 However, with this type of product, it is extremely difficult and time-consuming to uniformly apply the adhesive for the inner and outer spacers to the inner and outer surfaces of the transparent substrate, and the manufacturing process is complicated. There were drawbacks such as significantly higher costs.
本発明は前記事情に基いてなされたものであつ
て、製造工程を簡単にして製造費用を安価にする
ことができる情報記憶媒体を提供することを目的
とするものである。 The present invention has been made based on the above-mentioned circumstances, and it is an object of the present invention to provide an information storage medium that can simplify the manufacturing process and reduce manufacturing costs.
本発明を図面に示す一実施例を参照しながら説
明する。 The present invention will be described with reference to an embodiment shown in the drawings.
第２図は本発明の情報記憶媒体の一実施例を示
す断面図である。図において１０は情報記憶媒体
であつて、この情報記憶媒体１０は一対の基板１
１、基板１１上に形成された記録層１２、接着剤
よりなる保護層１３、および内外側スペーサ１４
ａ，１４ｂにより構成されている。 FIG. 2 is a sectional view showing an embodiment of the information storage medium of the present invention. In the figure, 10 is an information storage medium, and this information storage medium 10 is connected to a pair of substrates 1.
1. Recording layer 12 formed on substrate 11, protective layer 13 made of adhesive, and inner and outer spacers 14
a, 14b.
前記基板１１は、ガラスまたは合成樹脂で成型
され、例えば厚みが0.2〜２mmで直径がほぼ30cm
の円板状をなし、中心部に貫通孔１１ａを有す
る。前記記録層１２に図示しないレーザビームの
焦点を結ばせ情報の記録あるいは再生を行う場合
には、基板１１の材料としてのガラスまたは合成
樹脂は光透過性であることを要する。このような
合成樹脂として、例えば、ポリエチレンのような
ポリオレフイン、ポリ塩化ビニル、ポリ塩化ビニ
リデン、塩化ビニルやエチレンなどと酢酸ビニル
との共重合体、ポリカーボネート、ポリアクリル
酸、ポリメタクリル酸およびポリアクリル酸やポ
リメタクリル酸の低級アルキルエステルなどを挙
げることができる。透明性がよく、強度の大きい
基板１１を得るためには、ポリアクリル酸および
ポリメタクリル酸並びにこれら低級アルキルエス
テルが好ましい。 The substrate 11 is molded from glass or synthetic resin, and has a thickness of, for example, 0.2 to 2 mm and a diameter of approximately 30 cm.
It has a disk shape and has a through hole 11a in the center. When recording or reproducing information by focusing a laser beam (not shown) on the recording layer 12, the glass or synthetic resin used as the material for the substrate 11 needs to be transparent. Examples of such synthetic resins include polyolefins such as polyethylene, polyvinyl chloride, polyvinylidene chloride, copolymers of vinyl chloride and ethylene with vinyl acetate, polycarbonate, polyacrylic acid, polymethacrylic acid, and polyacrylic acid. and lower alkyl esters of polymethacrylic acid. In order to obtain a substrate 11 with good transparency and high strength, polyacrylic acid, polymethacrylic acid, and lower alkyl esters thereof are preferred.
基板１１の内面には、記録層１２が基板１１の
中心孔１１ａと中心とする同心円状の円環となる
ように形成されている。この記録層１２は光反射
材料でもつて薄層にしたものであり、光反射性材
料としては、レーザビームを反射することができ
ればよく、例えばAlやTeを挙げることができ
る。また、記録層１２の厚みは、例えば5000Å以
下である。前記基板１１の表面に記録層１２を形
成する方法としては、記録層１２を均一な前記厚
みの薄層にすることができればどのような方法で
あつてもよく、例えば、真空蒸着、スパツタ蒸着
およびイオン蒸着などの蒸着法を挙げることがで
きる。 A recording layer 12 is formed on the inner surface of the substrate 11 so as to form a concentric ring centered on the center hole 11a of the substrate 11. The recording layer 12 is a thin layer of a light-reflecting material, and the light-reflecting material may be any material that can reflect a laser beam, such as Al or Te. Further, the thickness of the recording layer 12 is, for example, 5000 Å or less. Any method may be used to form the recording layer 12 on the surface of the substrate 11 as long as the recording layer 12 can be made into a thin layer having a uniform thickness, such as vacuum evaporation, sputter evaporation, and Vapor deposition methods such as ion vapor deposition can be mentioned.
保護層１３は接着剤、例えばエポキシ樹脂、ゴ
ム系樹脂などの接着性樹脂をスピナーコーテイン
グなどの適宜の手段により基板１１および記録層
１２の表面に膜厚を均一にして塗布されて形成さ
れる。この保護層１３の膜厚は、例えば10〜30μ
ｍ程度塗布されて、記録層１２の全面を覆うとと
もにその記録層１２の内外周面と基板１１の一部
も覆われている。この接着剤を塗布した後、所定
時間、例えば15分程度自然乾燥させて所望の値に
硬化させ、その後、内外側スペーサ１４ａ，１４
ｂを前記基板１１と反対側の接着剤の接着部分１
３ａに取付けて接着するものである。したがつ
て、接着剤の保護部分１３ｂ間には中空部分１５
が形成され、その後、中空部分に面する接着剤部
分１３ｂは硬化されて保護層が形成されることと
なる。 The protective layer 13 is formed by applying an adhesive, such as an adhesive resin such as an epoxy resin or a rubber resin, to the surfaces of the substrate 11 and the recording layer 12 to a uniform thickness by an appropriate means such as spinner coating. The thickness of this protective layer 13 is, for example, 10 to 30μ.
m is coated to cover the entire surface of the recording layer 12 and also cover the inner and outer circumferential surfaces of the recording layer 12 and a part of the substrate 11. After applying this adhesive, it is naturally dried for a predetermined time, for example, about 15 minutes, to harden to a desired value, and then the inner and outer spacers 14a, 14
b is the bonded part 1 of the adhesive on the opposite side to the substrate 11
It is attached to and glued to 3a. Therefore, there is a hollow portion 15 between the protective portions 13b of the adhesive.
is formed, and then the adhesive portion 13b facing the hollow portion is cured to form a protective layer.
内外側スペーサ１４ａ，１４ｂは例えば合成樹
脂より形成され、円環状をなしている。 The inner and outer spacers 14a and 14b are made of synthetic resin, for example, and have an annular shape.
このように構成された情報記憶媒体１０の接着
強度はJIS規格に基いて剪断接着強度試験を行つ
た結果、その値はアクリル板よりなる透明基板を
２枚直接接着剤を介して接着した情報記憶媒体の
ものと同一の値を示した。 The adhesive strength of the information storage medium 10 configured as described above was determined by a shear adhesive strength test based on JIS standards. It showed the same value as that of the medium.
以上、本発明に係る情報記憶媒体の一実施例に
ついて詳述したが、本発明は前記一実施例に限定
されるものではなく、本発明の要旨を変更しない
限り他の変形例を包含することはいうまでもな
い。 Although one embodiment of the information storage medium according to the present invention has been described in detail above, the present invention is not limited to the above-described one embodiment, and may include other modifications as long as they do not change the gist of the present invention. Needless to say.
本発明は上記のように構成したので、保護層を
接着剤により形成し、かつこの接着剤を利用して
内外側スペーサを取付けることができ、保護層の
形成工程と、基板とスペーサとの接着工程とを同
時に行うことができて、製造工程を簡単にするこ
とができ、製造費用を安くすることができて経済
的である。また、記録層および基板の一部分に保
護層を塗布する際には通常のスピナーコーテイン
グを利用することができ、特別な装置を必要とし
ない。しかも、保護層の膜厚を均一にすることが
できるとともにその膜厚の制御も簡単である。さ
らに、基板と記録層が保護層によつて補強される
ので、情報記憶媒体の機械的強度が大きくなるな
どの優れた効果を有するものである。 Since the present invention is configured as described above, the protective layer can be formed with an adhesive, and the inner and outer spacers can be attached using this adhesive. It is economical because the steps can be performed simultaneously, the manufacturing process can be simplified, and manufacturing costs can be reduced. Further, when applying the protective layer to the recording layer and a portion of the substrate, a normal spinner coating can be used, and no special equipment is required. Furthermore, the thickness of the protective layer can be made uniform and the thickness can be easily controlled. Furthermore, since the substrate and the recording layer are reinforced by the protective layer, it has excellent effects such as increasing the mechanical strength of the information storage medium.
第１図は従来の情報記憶媒体の一例を示す断面
図、第２図は本発明の情報記憶媒体の一実施例を
示す断面図である。
１……記録層、２……透明基板、３……中空部
分、４……内外側スペーサ、１０……情報記憶媒
体、１１……基板、１２……記録層、１３……保
護層、１３ａ……接着部分、１３ｂ……保護部
分、１４……内外側スペーサ、１５……中空部
分。
FIG. 1 is a sectional view showing an example of a conventional information storage medium, and FIG. 2 is a sectional view showing an embodiment of the information storage medium of the present invention. DESCRIPTION OF SYMBOLS 1... Recording layer, 2... Transparent substrate, 3... Hollow part, 4... Inner/outer spacer, 10... Information storage medium, 11... Substrate, 12... Recording layer, 13... Protective layer, 13a ...Adhesive part, 13b...Protective part, 14...Inner and outer spacer, 15...Hollow part.
Claims (1)
は書込み可能な情報記憶媒体において、相対向す
る一対の基板と、この基板の対向面側に設けられ
情報を記録する記録層と、前記基板間に介在され
るスペーサと、前記記録層の表面および少なくと
も基板の一部に密着し、かつこの基板に密着して
いる反対側の面が前記スペーサに密着している接
着剤よりなる保護層とを具備したことを特徴とす
る情報記憶媒体。 ２ 前記接着剤の保護層が、エポキシ樹脂、ゴム
系樹脂などの接着性樹脂で形成されていることを
特徴とする特許請求の範囲第１項に記載の情報記
憶媒体。[Claims] 1. An information storage medium in which information can be read or written using a focused laser beam, comprising a pair of opposing substrates, and a recording layer provided on opposing surfaces of the substrates for recording information. , a spacer interposed between the substrates, and an adhesive that is in close contact with the surface of the recording layer and at least a part of the substrate, and whose opposite surface that is in close contact with the substrate is in close contact with the spacer. An information storage medium characterized by comprising a protective layer. 2. The information storage medium according to claim 1, wherein the adhesive protective layer is formed of an adhesive resin such as an epoxy resin or a rubber-based resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56014980A JPS57130242A (en) | 1981-02-05 | 1981-02-05 | Information storage medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56014980A JPS57130242A (en) | 1981-02-05 | 1981-02-05 | Information storage medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57130242A JPS57130242A (en) | 1982-08-12 |
| JPS6235171B2 true JPS6235171B2 (en) | 1987-07-31 |
Family
ID=11876111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56014980A Granted JPS57130242A (en) | 1981-02-05 | 1981-02-05 | Information storage medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57130242A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07176078A (en) * | 1993-12-24 | 1995-07-14 | Canon Inc | Optical recording medium |
-
1981
- 1981-02-05 JP JP56014980A patent/JPS57130242A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57130242A (en) | 1982-08-12 |
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