JPH09265675A - Production of laminated optical disk - Google Patents
Production of laminated optical diskInfo
- Publication number
- JPH09265675A JPH09265675A JP7362896A JP7362896A JPH09265675A JP H09265675 A JPH09265675 A JP H09265675A JP 7362896 A JP7362896 A JP 7362896A JP 7362896 A JP7362896 A JP 7362896A JP H09265675 A JPH09265675 A JP H09265675A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- time required
- manufacturing
- optical disk
- film
- 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
Landscapes
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】光記録媒体として使用される
貼り合わせ型光ディスクの製造方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for manufacturing a bonded optical disc used as an optical recording medium.
【０００２】[0002]
【従来の技術、および、発明が解決しようとする課題】
光記録媒体は反射光の微妙な変化を検知することによっ
て、情報を読取る。このため、基板に変形（うねり、そ
り）があると、読取装置のピックアップが追随できなく
なり、読取りエラーが発生しやすい。2. Related Art and Problems to be Solved by the Invention
The optical recording medium reads information by detecting a subtle change in reflected light. For this reason, if the substrate is deformed (waviness, warpage), the pickup of the reading device cannot follow and a reading error is likely to occur.
【０００３】ポリメチルメタアクリレート（以下、ＰＭ
ＭＡと略す）からなる基板は製造工程中に樹脂が水分を
吸収しやすいため、また、基板を射出成形によって得る
際に受ける応力等により、変形を生じやすい。そこで、
種々の基板の変形防止が検討されており、一般的には、
基板を所定の環境に放置、いわゆる、なまし処理を行っ
て、歪みを解消していた。基板を放置する環境の湿度、
温度、時間は各々最適化される。Polymethylmethacrylate (hereinafter referred to as PM
A substrate made of abbreviated as MA) is likely to be deformed because the resin easily absorbs water during the manufacturing process, and also due to stress or the like received when the substrate is obtained by injection molding. Therefore,
Various types of substrate deformation prevention have been studied, and in general,
The substrate is left in a predetermined environment, so-called so-called anneal processing is performed to eliminate the distortion. The humidity of the environment in which the substrate is left,
The temperature and time are optimized respectively.
【０００４】図３に従来の製造方法の工程フローチャー
トを示す。上述したように、基板の変形を防止するため
に、製膜工程と貼り合わせ工程との間に、ままし処理で
ある基板放置処理を設けている。しかし、基板放置処理
を行うために、生産工程が繁雑化し、生産時間が要して
いた。FIG. 3 shows a process flow chart of a conventional manufacturing method. As described above, in order to prevent the deformation of the substrate, the substrate leaving process, which is a leaving process, is provided between the film forming process and the bonding process. However, since the substrate is left untreated, the production process is complicated and the production time is long.
【０００５】本発明の目的は簡便な製造方法で基板の変
形が生じない、貼り合わせ型ディスクの製造方法を提供
することにある。It is an object of the present invention to provide a method for manufacturing a bonded disc in which the substrate is not deformed by a simple manufacturing method.
【０００６】[0006]
【課題を解決するための手段】本発明の要旨は、２枚の
基板を貼り合わせた貼り合わせ型光ディスクの製造方法
において、前記基板が変形を始める以前に貼り合わせを
行うことを特徴とする貼り合わせ型光ディスクの製造方
法である。異なる本発明の要旨は、ポリメチルメタアク
リレートからなる基板を成形する射出成形工程、基板上
に反射膜および／または保護膜を形成する製膜工程、該
製膜工程を経た２枚の基板を貼り合わせる貼り合わせ工
程からなる貼り合わせ型光ディスクの製造方法におい
て、前記貼り合わせ型光ディスクの製造に要する所要時
間が２０分以内であることを特徴とする貼り合わせ型光
ディスクの製造方法である。SUMMARY OF THE INVENTION The gist of the present invention is, in a method of manufacturing a bonded type optical disk in which two substrates are bonded, bonding is performed before the substrates start to be deformed. It is a method of manufacturing a combined optical disc. Different points of the present invention include an injection molding step of molding a substrate made of polymethylmethacrylate, a film forming step of forming a reflection film and / or a protective film on the substrate, and bonding two substrates after the film forming step. In the method for manufacturing a bonded optical disk, which comprises a bonding step, the time required for manufacturing the bonded optical disk is within 20 minutes.
【０００７】[0007]
【実施例】図１は本発明の製造方法の工程フローチャー
トを示す。図２は図１に示した製造方法に要する所要時
間と変形量との関係を示すグラフである。図１に示され
る本発明の製造方法は基板を成形する射出成形工程、基
板上に反射膜および／または保護膜を形成する製膜工
程、製膜工程を経た２枚の基板を貼り合わせる貼り合わ
せ工程と、各工程間の輸送とからなり、それらすべの全
工程の所要時間が２０分以内である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a process flow chart of the manufacturing method of the present invention. FIG. 2 is a graph showing the relationship between the time required for the manufacturing method shown in FIG. 1 and the amount of deformation. The manufacturing method of the present invention shown in FIG. 1 includes an injection molding step for molding a substrate, a film forming step for forming a reflection film and / or a protective film on the substrate, and a bonding step for bonding two substrates after the film forming step. It consists of steps and transportation between each step, and the time required for all the steps is within 20 minutes.
【０００８】射出成形工程の所要時間は０．２〜１分の
範囲、反射膜および／または保護膜を形成する製膜工程
の所要時間は１０〜１８分の範囲、貼り合わせ工程の所
要時間は２〜５分の範囲が好ましく、そして、各工程へ
の輸送時間を含めて全工程の所要時間を２０分以内に調
整する。The time required for the injection molding process is in the range of 0.2 to 1 minute, the time required for the film forming process for forming the reflection film and / or the protective film is in the range of 10 to 18 minutes, and the time required for the bonding process is The range of 2 to 5 minutes is preferable, and the time required for all steps including the transportation time to each step is adjusted within 20 minutes.
【０００９】図２は横軸が全工程の所要時間（単位：ｍ
ｉｎ）であり、縦軸は各所要時間における基板の変形量
（単位：ｍｍ）である。使用した基板はＰＭＭＡを射出
成形した直径１２０ｍｍの基板であり、射出成形工程の
所要時間は０．５分、製膜工程の所要時間は１２分、貼
り合わせ工程の所要時間は２分とした。製膜工程から貼
り合わせ工程への輸送時間を調整して、全工程の所要時
間を変化させた。製造環境は湿度５０±５％Ｒ．Ｈ．、
温度２４±１℃である。図２より明らかなように、全工
程の所要時間が２０分以内であるならば、基板は変形し
ていない。In FIG. 2, the horizontal axis represents the time required for all processes (unit: m).
in), and the vertical axis represents the deformation amount (unit: mm) of the substrate at each required time. The substrate used was a 120 mm diameter substrate obtained by injection-molding PMMA, the injection-molding step required time of 0.5 minutes, the film-forming step required time of 12 minutes, and the bonding step required time of 2 minutes. The time required for all the steps was changed by adjusting the transportation time from the film forming step to the bonding step. Manufacturing environment is humidity 50 ± 5% R. H. ,
The temperature is 24 ± 1 ° C. As is clear from FIG. 2, if the time required for the entire process is within 20 minutes, the substrate is not deformed.
【００１０】本発明では、基板が変形する以前に２枚の
基板を接着剤により貼り合わせる。得られた貼り合わせ
型ディスクを湿度６５％Ｒ．Ｈ．、温度２４±３℃で４
８時間放置したところ、変形は生じていなかった。貼り
合わせられることにより、基板が変形を起こしにくくな
った。In the present invention, the two substrates are bonded together with an adhesive before the substrates are deformed. The obtained laminated disc was subjected to a humidity of 65% R.V. H. , At a temperature of 24 ± 3 ℃ 4
When left for 8 hours, no deformation occurred. By being stuck together, the substrate became less likely to deform.
【００１１】[0011]
【発明の効果】以上説明したように、本発明の貼り合わ
せ型ディスクの製造方法により、基板放置処理を行わな
くとも、基板の変形を防止できるため、生産性が高くな
る。As described above, according to the method of manufacturing the bonded disc of the present invention, the deformation of the substrate can be prevented without performing the substrate leaving treatment, so that the productivity is increased.
【図１】本発明の製造方法の工程フローチャート。FIG. 1 is a process flowchart of a manufacturing method of the present invention.
【図２】製膜工程後の基板の基板放置時間と変形量との
関係を示すグラフ。FIG. 2 is a graph showing a relationship between a substrate leaving time and a deformation amount of a substrate after a film forming process.
【図３】従来の製造方法の工程フローチャート。FIG. 3 is a process flowchart of a conventional manufacturing method.
Claims (2)
光ディスクの製造方法において、前記基板が変形を始め
る以前に貼り合わせを行うことを特徴とする貼り合わせ
型光ディスクの製造方法。1. A method of manufacturing a bonded optical disk, which comprises bonding two substrates together, wherein the bonding is performed before the substrates start to deform.
板を成形する射出成形工程、基板上に反射膜および／ま
たは保護膜を形成する製膜工程、該製膜工程を経た２枚
の基板を貼り合わせる貼り合わせ工程からなる貼り合わ
せ型光ディスクの製造方法において、前記貼り合わせ型
光ディスクの製造に要する所要時間が２０分以内である
ことを特徴とする貼り合わせ型光ディスクの製造方法。2. An injection molding process for molding a substrate made of polymethylmethacrylate, a film forming process for forming a reflection film and / or a protective film on the substrate, and a bonding process for bonding two substrates after the film forming process. A method for manufacturing a bonded optical disk comprising a bonding step, wherein the time required for manufacturing the bonded optical disk is within 20 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7362896A JPH09265675A (en) | 1996-03-28 | 1996-03-28 | Production of laminated optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7362896A JPH09265675A (en) | 1996-03-28 | 1996-03-28 | Production of laminated optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09265675A true JPH09265675A (en) | 1997-10-07 |
Family
ID=13523781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7362896A Pending JPH09265675A (en) | 1996-03-28 | 1996-03-28 | Production of laminated optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09265675A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6605179B1 (en) | 1998-08-26 | 2003-08-12 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for bonding optical disk substrate |
-
1996
- 1996-03-28 JP JP7362896A patent/JPH09265675A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6605179B1 (en) | 1998-08-26 | 2003-08-12 | Matsushita Electric Industrial Co., Ltd. | Method and apparatus for bonding optical disk substrate |
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