JPH0760533B2 - Optical recording medium - Google Patents
Optical recording mediumInfo
- Publication number
- JPH0760533B2 JPH0760533B2 JP61215861A JP21586186A JPH0760533B2 JP H0760533 B2 JPH0760533 B2 JP H0760533B2 JP 61215861 A JP61215861 A JP 61215861A JP 21586186 A JP21586186 A JP 21586186A JP H0760533 B2 JPH0760533 B2 JP H0760533B2
- Authority
- JP
- Japan
- Prior art keywords
- recording medium
- adhesive
- optical recording
- recording
- 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.)
- Expired - Fee Related
Links
Landscapes
- Optical Record Carriers And Manufacture Thereof (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、光ビームにより記録、再生を行うことが可能
な光記録媒体に関する。TECHNICAL FIELD The present invention relates to an optical recording medium capable of recording and reproducing with a light beam.
従来より、透明な基板上に、希土類−遷移金属の合金薄
膜、非晶質から結晶質への相転移を利用したカルコゲン
化合物等の還元性酸化物薄膜、ヒートモードの記録媒体
薄膜等の光メモリ材料を成膜し、この記録媒体２枚を該
記録層が対向するように接着した貼り合わせ構造や、記
録媒体に例えばスペーサーを挟み込んで接着したエアー
サンドイッチ構造の光記録媒体が提案されている。Conventionally, optical memory materials such as rare earth-transition metal alloy thin films, reducing oxide thin films such as chalcogen compounds utilizing the phase transition from amorphous to crystalline, and heat mode recording medium thin films on transparent substrates. There has been proposed an optical recording medium having a laminated structure in which two recording media are adhered so that the recording layers face each other, or an air sandwich structure in which a spacer is sandwiched between the recording media and bonded.
この記録媒体の接着には、従来、熱硬化型、二液常温硬
化型、紫外線硬化型等の接着剤が用いれらていた。しか
し、熱硬化型の接着剤は、硬化時の熱で記録特性が劣化
してしまうような媒体には使用できない。又、基板材料
にプラスチックを使用した場合、接着剤の硬化温度と基
板材料の熱変形温度の相対的関係によっては基板が変形
したり、記録層と基板の熱膨張率の違いから膜にクラッ
クが発生したりする。For the adhesion of this recording medium, a thermosetting adhesive, a two-component room temperature curing adhesive, an ultraviolet curing adhesive or the like has been conventionally used. However, the thermosetting adhesive cannot be used for a medium whose recording characteristics are deteriorated by heat during curing. When plastic is used as the substrate material, the substrate may be deformed depending on the relative relationship between the curing temperature of the adhesive and the thermal deformation temperature of the substrate material, or the film may be cracked due to the difference in thermal expansion coefficient between the recording layer and the substrate. Occur.
また、二液常温硬化型の接着剤の場合には、主剤と硬化
剤の混合工程が必要であったり、硬化時間が長い等、量
産性が悪いという欠点があった。Further, in the case of the two-component room temperature curing type adhesive, there is a drawback that mass productivity is poor, such as a step of mixing the main agent and the curing agent is required and a curing time is long.
一方、紫外線硬化型の接着剤の場合には前述したような
欠点がなく、常温で、しかも短時間で硬化ができるとい
う長所がある。しかしながら紫外線硬化型の接着剤も万
能とは言えず、使用する基板に紫外線吸収剤が入ってい
たり、カルコゲン化合物や有機色素のように紫外線によ
り劣化するような材料を記録層に使用した場合には、紫
外線硬化型接着剤を記録媒体の接着に使用することがで
きない。又、紫外線とオゾンに対する人体の保護等取扱
い上の注意が必要である。On the other hand, the ultraviolet curable adhesive has the advantage that it can be cured at room temperature in a short time without the above-mentioned drawbacks. However, UV-curable adhesives are not universal, and if the substrate used contains UV absorbers, or if materials such as chalcogen compounds and organic dyes that deteriorate with UV light are used in the recording layer, However, UV-curable adhesives cannot be used to bond recording media. In addition, care must be taken in handling such as protection of the human body against ultraviolet rays and ozone.
本発明の目的は、紫外線硬化型接着剤のデメリットを取
り除き、なおかつそのメリットをそこなわない形で、光
記録媒体の接着を行えるようにすることである。An object of the present invention is to eliminate the disadvantages of the ultraviolet curable adhesive and to enable the optical recording medium to be adhered in a form that does not impair the advantages.
すなわち本発明は基板に紫外線吸収剤が入っていても硬
化可能で、記録材料に紫外線により劣化するような物を
使用した場合でも記録媒体を劣化させずに接着でき、又
プラスチック基板を使用しても変形を起こさずに短時間
に量産性良く記録媒体を接着させて、２個の光記録媒体
が、記録層が対向するように接着して構成される光記録
媒体を提供することを目的とするものである。That is, the present invention can be cured even if the substrate contains an ultraviolet absorber, can be bonded without degrading the recording medium even when a recording material that is deteriorated by ultraviolet rays is used, and a plastic substrate is used. It is an object of the present invention to provide an optical recording medium in which two recording media are adhered so that recording layers face each other by adhering the recording media in a short time with good productivity without causing deformation. To do.
本発明は基板上に形成された光記録層を含む２個の光記
録媒体が、該記録層が対向する様にして接着して構成さ
れる貼り合わせ構造及びエアーサンドイッチ構造の光記
録媒体において、使用する接着剤に、可視光硬化型接着
剤を用いることを特徴とする光記録媒体である。The present invention provides an optical recording medium having a laminated structure and an air sandwich structure, in which two optical recording media including an optical recording layer formed on a substrate are adhered so that the recording layers face each other. The optical recording medium is characterized in that a visible light curable adhesive is used as the adhesive used.
本発明に用いる可視光硬化型接着剤としては、可視光に
感光、硬化する材料であれば使用することができる。以
下の表に可視光で架橋するポリマー材料と、その材料に
使用される増感剤の例を記載する。これらの材料を成分
として含む接着剤であれば使用できるが、これに限定さ
れるものではない。As the visible light curable adhesive used in the present invention, any material that is sensitive to visible light and cured can be used. The table below lists examples of polymeric materials that crosslink with visible light and the sensitizers used in the materials. Any adhesive containing these materials as components can be used, but the adhesive is not limited thereto.
本発明による光記録媒体の接着方法は、上記接着剤とし
て可視光硬化型接着剤を用いて、２枚の記録媒体の記録
層が対向するように直接貼り合わせるか、又は２枚の記
録媒体を内、外周スペーサーを介して接着させあるいは
２枚の記録媒体をスペーサーを使わずに可視硬化型接着
剤にビーズを混合して中空構造で接着させる。 The method for adhering an optical recording medium according to the present invention uses a visible light curable adhesive as the above-mentioned adhesive and directly attaches the recording layers of two recording media so that the recording layers face each other, or two recording media are adhered to each other. The inner and outer peripheral spacers are adhered to each other, or the two recording media are adhered in a hollow structure by mixing beads with a visible curable adhesive without using a spacer.
以下に実施例により本発明を説明する。 The present invention will be described below with reference to examples.
実施例−１ 第１図に示した貼り合わせ構造の光記録媒体を次のよう
にして製作した。外周130mmφ、内周15mmφのドーナツ
状のポリカーボネート基板１に真空蒸着装置を用いて抵
抗加熱により反射防止層２としてSiOを蒸着した後、ス
パッタリングによりGdTbFeCoの記録層３を形成した。さ
らに、この記録層３をおおうように、真空蒸着装置を用
いて保護層４としてSiOを3000Å蒸着した。この記録媒
体２ケを用い一方の保護層４の表面に可視光硬化型接着
剤５（オプティカルファイバー テクノロジー社製 OF
TI-VLCA）を塗布し、接着剤層を介して保護層が対向す
るように張り合わせ、タングステンハロゲンランプの光
を照射して接着剤５を硬化させた。硬化条件は、400mW/
cm2/secのパワーで10秒間である。このように、可視光
硬化型接着剤を用いて、紫外線やオゾンの危険にさらさ
れることなく短時間に磁気特性の劣化や基板の変形を起
こさずに良好な接着を行なうことができた。Example-1 An optical recording medium having the laminated structure shown in FIG. 1 was manufactured as follows. SiO 2 was vapor-deposited as an antireflection layer 2 by resistance heating using a vacuum vapor deposition apparatus on a doughnut-shaped polycarbonate substrate 1 having an outer periphery of 130 mmφ and an inner periphery of 15 mmφ, and then a GdTbFeCo recording layer 3 was formed by sputtering. Further, 3000 Å of SiO was vapor-deposited as a protective layer 4 using a vacuum vapor deposition device so as to cover the recording layer 3. A visible light curable adhesive 5 (OFC manufactured by Optical Fiber Technology, Inc.
TI-VLCA) was applied, and the adhesive layers were laminated so that the protective layers faced each other, and the adhesive 5 was cured by irradiating light from a tungsten halogen lamp. Curing conditions are 400mW /
It has a power of cm 2 / sec for 10 seconds. Thus, by using the visible light curable adhesive, good adhesion could be achieved in a short time without being exposed to the danger of ultraviolet rays or ozone and without causing deterioration of magnetic characteristics or deformation of the substrate.
実施例−２ 第２図に示したエアーサンドイッチ構造の光記録媒体を
次のようにして製作した。実施例−１と同じ大きさの紫
外線吸収剤入りポリカーボネート基板6,6′上にポリメ
チレン系色素を３％イソプロピルアルコール溶液にして
スピンコートし、約800Åの膜厚で記録層7,7′を成膜し
た。この基板２枚を記録層面を内側にして0.5mm厚のス
ペーサー8,8′を挟んで中空構造にし、実施例−１に用
いた可視光硬化型接着剤５で張り合わせた。硬化はタン
グステンハロゲンランプを使用し400mW/cm2/secのパワ
ーで20秒間である。従来は、記録材料に染料を使った場
合は耐光性が悪く、紫外線硬化型接着剤は使用しずらか
った。又、記録材料を光から保護する為に基板内に紫外
線吸収剤を入れた場合には、接着剤が硬化せず使用でき
なかった。しかしながら今回のように可視光硬化型接着
剤を使った場合には、紫外線吸収剤入りの基板を使用し
ても接着剤を短時間に作業性良く硬化することができ、
染料に対するアタックもほとんどない。又、貼合せ後
も、基板が紫外線をカットする為、紫外線に対する耐光
性が問題となるような材料を使った媒体は耐光性が向上
する。Example-2 An optical recording medium having an air sandwich structure shown in FIG. 2 was manufactured as follows. A polymethylene dye was spin-coated on a polycarbonate substrate 6 or 6'containing an ultraviolet absorber having the same size as in Example 1 with a 3% isopropyl alcohol solution to form a recording layer 7 or 7'with a thickness of about 800 Å. Filmed The two substrates were made into a hollow structure with the recording layer surface inside and spacers 8 and 8'having a thickness of 0.5 mm were sandwiched therebetween, and the substrates were pasted with the visible light curable adhesive 5 used in Example-1. Curing is performed with a tungsten halogen lamp at a power of 400 mW / cm 2 / sec for 20 seconds. In the past, when a dye was used as a recording material, the light resistance was poor and it was difficult to use an ultraviolet curable adhesive. Moreover, when an ultraviolet absorber was put in the substrate to protect the recording material from light, the adhesive was not cured and could not be used. However, when using a visible light curable adhesive like this time, the adhesive can be cured with good workability in a short time even if a substrate containing an ultraviolet absorber is used.
There is almost no attack on the dye. In addition, since the substrate cuts ultraviolet rays even after bonding, the light resistance of the medium using a material whose light resistance to ultraviolet rays becomes a problem is improved.
実施例−３ 第３図に示したエアーサンドイッチ構造の光記録媒体を
次のようにして製作した。記録層7,7′の成膜までは実
施例−２と同様にし、その後記録媒体の記録層７側に直
径0.5mmのガラスビーズ入り可視光硬化型接着剤９を実
施例−２のスペーサーの代わりに滴下し、もう一方の記
録媒体を中空構造で貼り合わせた。Example-3 An optical recording medium having an air sandwich structure shown in FIG. 3 was manufactured as follows. The procedure up to the formation of the recording layers 7 and 7'was performed in the same manner as in Example-2, and then a visible light curable adhesive 9 containing glass beads having a diameter of 0.5 mm was applied to the recording layer 7 side of the recording medium. Instead, the recording medium was dropped, and the other recording medium was bonded with a hollow structure.
このように製作した光記録媒体は、実施例−２で説明し
た可視光硬化型接着剤使用によるメリットの他に、スペ
ーサーの代わりにビーズの径で媒体の間隔を規制してい
る為、コスト的に有利でありスペーサーの位置合わせ工
程が不要となり、作業性がいちだんと向上する。The optical recording medium manufactured in this manner has a merit of using the visible light curable adhesive described in Example-2, and in addition to the spacers, the diameter of the beads regulates the distance between the mediums. It is advantageous in that the spacer alignment process is unnecessary, and workability is greatly improved.
以上説明したように、本発明による接着剤を用いれば、
記録特性の劣化や基板の変形を起こさずに良好な装着を
行うことができ、したがって安価で信頼性の高い光記録
媒体を提供することができる。As described above, by using the adhesive according to the present invention,
Good mounting can be performed without causing deterioration of recording characteristics and deformation of the substrate, and thus an inexpensive and highly reliable optical recording medium can be provided.
第１、第２、第３図は本発明による光記録媒体を模式的
に示した側断面図である。 １……基板 ２……反射防止層 ３……記録層 ４……保護層 ５……接着層 6,6′……紫外線吸収剤入り基板 7,7′……記録層 8,8′……スペーサー ９……ビーズ入り接着層1, 2, and 3 are side sectional views schematically showing an optical recording medium according to the present invention. 1 ... Substrate 2 ... Anti-reflection layer 3 ... Recording layer 4 ... Protective layer 5 ... Adhesive layer 6,6 '... Substrate with ultraviolet absorber 7,7' ... Recording layer 8,8 '... Spacer 9 ... Beaded adhesive layer
Claims (2)
２枚の基板を、接着剤によって接着して成る光記録媒体
において、 前記接着剤に、可視光硬化型接着剤を用いることを特徴
とする光記録媒体。1. An optical recording medium comprising two substrates, at least one of which has an optical recording layer formed thereon, bonded by an adhesive, wherein a visible light curable adhesive is used as the adhesive. Characteristic optical recording medium.
前記２枚の基板の間に空間が設けられてなる特許請求の
範囲第１項記載の光記録媒体。2. Beads are added to the adhesive,
The optical recording medium according to claim 1, wherein a space is provided between the two substrates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61215861A JPH0760533B2 (en) | 1986-09-16 | 1986-09-16 | Optical recording medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61215861A JPH0760533B2 (en) | 1986-09-16 | 1986-09-16 | Optical recording medium |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6371951A JPS6371951A (en) | 1988-04-01 |
| JPH0760533B2 true JPH0760533B2 (en) | 1995-06-28 |
Family
ID=16679487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61215861A Expired - Fee Related JPH0760533B2 (en) | 1986-09-16 | 1986-09-16 | Optical recording medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0760533B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7075703B2 (en) * | 2004-01-16 | 2006-07-11 | E Ink Corporation | Process for sealing electro-optic displays |
-
1986
- 1986-09-16 JP JP61215861A patent/JPH0760533B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6371951A (en) | 1988-04-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |