JPS60151851A - Duplicating method of optical disk substrate - Google Patents
Duplicating method of optical disk substrateInfo
- Publication number
- JPS60151851A JPS60151851A JP625684A JP625684A JPS60151851A JP S60151851 A JPS60151851 A JP S60151851A JP 625684 A JP625684 A JP 625684A JP 625684 A JP625684 A JP 625684A JP S60151851 A JPS60151851 A JP S60151851A
- Authority
- JP
- Japan
- Prior art keywords
- resin layer
- substrate
- soft
- optical disk
- photosensitive resin
- 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
- G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発、明は、再生専用のビデオディスクやオーディオデ
ィスク、記録・再生・（消去）のできるディスクメモリ
ー等光デイスク基板を感光性樹脂を使って複製する複製
法に関する。[Detailed Description of the Invention] [Technical Field of the Invention] The present invention provides optical disk substrates such as playback-only video disks and audio disks, and disk memories that can be recorded, played back, and (erased) using photosensitive resin. Concerning the method of copying.
一般に、ビデオディスクやディジタルオーディオディス
ク用の情報記録担体は、表面に多数の信号ピットが形成
されたもので、一方ディスクメモリー用の情報記録担体
は、光学ヘッドを高精網にトラッキングさせるため案内
溝（プレグルーブ）が形成されている。Generally, information recording carriers for video discs and digital audio discs have a large number of signal pits formed on the surface, while information recording carriers for disc memories have guide grooves for tracking the optical head on a high-definition net. (pre-groove) is formed.
ピットおよび案内溝はサブミクロンオーダーの微細な凹
凸のパターンであり、これらの凹凸パターンをもつ情報
記録担体は、一般にスタンパ−と呼ばれる転写用型から
多量に複製される。この複製法として、主にインジェク
ション法と２Ｐ法（紫外線硬化性ラッカーを転写用材料
として用いる複製方法）が知られている。インジェクシ
ョン法は、装置が大型化し、転写精度があまり良くない
という欠点をもつ。一方、２Ｐ法は、インジェクション
法に比べ、製造装置がコンパクトで転写精度も優れてい
るが、紫外線硬化性ラッカーを転写用型の情報面上に気
泡を混入しないように充填することが困難であるという
複製技術上の問題と、上記紫外線硬化性ラッカー中に含
有されている反応性モノマーは、一般に皮膚毒性、経口
毒性が強く複製時の作業者の安全衛生上の問題があった
。The pits and guide grooves are fine uneven patterns on the order of submicrons, and information recording carriers having these uneven patterns are generally copied in large quantities from a transfer mold called a stamper. As this duplication method, the injection method and the 2P method (a duplication method using an ultraviolet curable lacquer as a transfer material) are mainly known. The injection method has the drawbacks that the device becomes large and the transfer accuracy is not very good. On the other hand, compared to the injection method, the 2P method requires more compact manufacturing equipment and has superior transfer accuracy, but it is difficult to fill the information surface of the transfer mold with UV-curable lacquer without introducing air bubbles. In addition, the reactive monomers contained in the ultraviolet curable lacquers are generally highly toxic to the skin and to the oral cavity, posing health and safety problems for workers during duplication.
本発明の目的は、上記従来法の欠点’＆Ｎ消し、特別の
技術を要することなく容易に多量複製ができる光デイス
ク基板を複製する方法を提供することである。An object of the present invention is to eliminate the drawbacks of the above-mentioned conventional methods and to provide a method for duplicating optical disk substrates that can be easily reproduced in large quantities without requiring special techniques.
すなわち、作業者が、コンパクトな成形機で容易に多量
複製ができ、かつ安全衛生上も全く問題のない複製方法
全提供しようとするものである。That is, the aim is to provide a complete duplication method that allows an operator to easily make large quantities of duplication using a compact molding machine, and which poses no health and safety problems.
本発明は、予め軟質の紫外線で硬化する樹脂層を表面に
設けた平担なプラスチックもしくはガラス等の基板を用
意し、この基板を軟質の樹脂層を転写用型との間に挾み
込むように押圧しながら、紫外線を照射して、軟質の樹
脂層を硬化させ、その後転写用型からこの硬化した樹脂
層を基板ごと剥離することにより、転写用型の表面に形
成されている凹凸の情報パターンを忠実に基板上に転写
するという光ディスクの複製法である。The present invention involves preparing a flat substrate made of plastic or glass on the surface of which a soft resin layer that can be cured by ultraviolet rays is prepared in advance, and sandwiching the soft resin layer between the substrate and a transfer mold. The soft resin layer is hardened by irradiating it with ultraviolet rays while being pressed, and then this hardened resin layer is peeled off from the transfer mold along with the substrate. Information on the irregularities formed on the surface of the transfer mold is then obtained. This is an optical disc reproduction method that faithfully transfers a pattern onto a substrate.
軟質の紫外線で硬化する樹脂層の成分としては、少なく
とも紫外線を吸収して活性種を発生させる光開始剤と、
この発生した活性種により連鎖的に重合を起こす、反応
性オリゴマーあるいは反応性モノマーを含有したもので
、樹脂層全体としては外見的に液状のものでなく軟質固
体である。また、樹脂層成分として、基板との密着性に
すぐれた結着用ポリマー例えばポリメチルメタクリレー
ト。The components of the soft resin layer that cures with ultraviolet light include at least a photoinitiator that absorbs ultraviolet light and generates active species;
It contains reactive oligomers or reactive monomers that undergo chain polymerization due to the generated active species, and the resin layer as a whole does not appear to be liquid but is a soft solid. In addition, as a resin layer component, a binding polymer with excellent adhesion to the substrate, such as polymethyl methacrylate, is used.
ポリウレタン、ポリエステル等を添加することもできる
。さらに帯電防止剤、硬化促進剤等を加えることもでき
る。Polyurethane, polyester, etc. can also be added. Furthermore, antistatic agents, curing accelerators, etc. can also be added.
このような軟質の紫外線で硬化する樹脂層全基板上に設
ける方法としては、１）スピンナー塗布法、２）ロール
コーティング法９等が適している。As a method for providing such a soft ultraviolet ray-curable resin layer on the entire substrate, 1) a spinner coating method, 2) a roll coating method 9, etc. are suitable.
スピンナー塗布法は、上記のような樹脂層成分を溶媒に
溶解して粘度の低い溶液とし、これをスピンナーで基板
上に所望の膜厚に塗布した後、塗布ノーの溶媒を乾燥さ
せる方法がある。一方、ロールコーティング法は基板が
ロールの二ツブ間を通過する際に、上記感光性樹脂をロ
ール側から、基板側へ転移させて塗布する方法である。The spinner coating method involves dissolving the above-mentioned resin layer components in a solvent to form a low-viscosity solution, applying this to the desired thickness on the substrate using a spinner, and then drying the solvent without coating. . On the other hand, the roll coating method is a method in which the photosensitive resin is transferred from the roll side to the substrate side and applied when the substrate passes between two rolls.
この方法においても、やはり、感光性樹脂は、溶媒に溶
かして低粘度にしておく方が塗布面がなめらかになるの
で好ましい。In this method, it is still preferable to dissolve the photosensitive resin in a solvent to make it have a low viscosity, since this results in a smooth coated surface.
このような平担な基板上に設けられた軟質の感光性樹脂
層を転写用型の上に押圧する手段として、ロール、プレ
ス、空気圧等を用いることができるが、より具体的には
、基板を球状対称に変形させた状態で押圧することが感
光性樹脂層に空気の泡を抱き込まなくて好ましい。Rolls, presses, air pressure, etc. can be used as a means to press the soft photosensitive resin layer provided on such a flat substrate onto the transfer mold, but more specifically, It is preferable to press the photosensitive resin layer in a spherically symmetrically deformed state to prevent air bubbles from being trapped in the photosensitive resin layer.
また、感光性樹脂層を硬化させるだめの紫外線としては
、低圧水銀灯、高圧水銀灯、メタルハライドランプ等が
用いられる。Further, as the ultraviolet light for curing the photosensitive resin layer, a low pressure mercury lamp, a high pressure mercury lamp, a metal halide lamp, etc. are used.
一般に転写用型としては、金属製特に電鋳法によす造う
れたニッケルスタンパ−が用いられるが、感光性樹脂を
紫外線で硬化させた後、このニッケルスタンパ−から容
易に剥離するためには、感光性樹脂の主成分として、ポ
リブタジェンないしは、ポリブタジェンとエポキシ樹脂
のコポリマー全アクリル変性あるいはメタクリル変性し
たものが好ましい。さらに、ニッケルスタンパ−との型
離れを上げるためには、スタンパ−上に離型剤全塗布す
れば良い。Generally, a metal stamper, especially a nickel stamper made by electroforming, is used as a transfer mold. As the main component of the photosensitive resin, it is preferable to use polybutadiene or a copolymer of polybutadiene and epoxy resin which is completely acrylic-modified or methacrylic-modified. Furthermore, in order to improve the separation from the nickel stamper, it is sufficient to apply the release agent completely on the stamper.
このような平担な基板上に設けられた軟質の感光性樹脂
層は保存中にゴミが付着するため保護シート、（例えば
離型性の良いポリエステルフィルム等）で被覆しておく
とよい。Since dust adheres to the soft photosensitive resin layer provided on such a flat substrate during storage, it is preferable to cover it with a protective sheet (for example, a polyester film with good mold releasability).
エポキシブタジェンオリゴマ−（日本曹達製ＥＰＢ１４
エポキシ当量４００〜５００）をアクリル変性した反
応性オリゴマー ９０重量部、ＰＭＭＡ（Ｄｕｐｏｎｔ
製・エルバサイト２００８）１０重量部光開始剤（２，
２−ジメトキシ−２・フェニルアセトフェノン）４重量
部とを、酢酸ブチルに溶解し、濃度３００重量部感光性
樹脂溶液を調製した。この調製液を予めディスク形状に
加工したアクリル基板（外径３０５＋ｍグ 厚み１．２
霞ｔ）上に塗布乾燥し、１μｍ厚の軟質の感光性樹脂層
を形成した、（第１図（１））。放置中にゴミが付着す
るのを防ぐためこの感光性樹脂層上にポリエステルフィ
ルムをロールで張り合わせた、（第１図（２））。転写
用型には、画像情報が凹凸の信号ピントで全面に記録さ
れているレジスト原盤から電鋳法で転写されてできたビ
デオディスク用ニッケルスタンバ−ｆ用いた。このニッ
ケルスタンバー上に、上記の感光性樹脂層全役けたアク
リル基板を感光性樹脂層全挾みこむようにロールで押圧
した後、（第１図（４））。紫外線を基板側から照射し
て、感光性樹脂層を硬化させた、（第１図（５））。用
いた紫外線ラングは８０Ｗ／ｃｒｎの水冷式直管型高圧
水銀灯であった。Epoxybutadiene oligomer (EPB14 manufactured by Nippon Soda)
90 parts by weight of a reactive oligomer obtained by acrylic modification of epoxy equivalent (epoxy equivalent: 400-500), PMMA (Dupont
10 parts by weight of photoinitiator (2008)
4 parts by weight of 2-dimethoxy-2-phenylacetophenone) were dissolved in butyl acetate to prepare a photosensitive resin solution having a concentration of 300 parts by weight. An acrylic substrate (outer diameter 305+m, thickness 1.2
A soft photosensitive resin layer having a thickness of 1 μm was formed by coating and drying the photosensitive resin layer on top of the photosensitive resin (Fig. 1 (1)). In order to prevent dust from adhering during storage, a polyester film was pasted onto this photosensitive resin layer using a roll (Fig. 1 (2)). The transfer mold used was a nickel stamper f for a video disc, which was made by electroforming and transferred from a resist master disc on which image information was recorded on the entire surface with uneven signal focus. After pressing the acrylic substrate with the entire photosensitive resin layer on the nickel stump bar with a roll so as to completely sandwich the photosensitive resin layer (FIG. 1 (4)). The photosensitive resin layer was cured by irradiating ultraviolet light from the substrate side (FIG. 1 (5)). The ultraviolet lamp used was an 80 W/crn water-cooled straight tube high-pressure mercury lamp.
硬化された感光性樹脂層をアクリル基板ごとニッケルス
タンパ−から剥離すると、（第１図（６））。When the cured photosensitive resin layer is peeled off from the nickel stamper along with the acrylic substrate (FIG. 1 (6)).
信号ピントのきれいに転写されたビデオディスク基板が
得られた。A video disc substrate was obtained in which the signal was clearly focused.
本複製方法は、転写用材料として、液状の紫外線で硬化
するラッカーを用いることなく、軟質の感光性樹脂）−
全表面に設けた基板を用いるため、容易に多量複製がで
き、また、安全衛生上の問題も生じない。This duplication method does not use a liquid lacquer that is cured by ultraviolet light as a transfer material, but uses a soft photosensitive resin).
Since a substrate provided on the entire surface is used, it is easy to make large quantities of copies, and there are no health and safety problems.
第１図は、本発明による光デイスク基板の製造方法を工
程順に説明するだめの概略図である。
１・・・軟質感光性樹脂層
２・・基板
３・・・ラミネート
４・・・加圧ロール
５・・・転写用型
代理人弁理士 則近恵佑（はが１名）
％ １％、ｌ η
ゝ′ −一 ＼−FIG. 1 is a schematic diagram illustrating the method of manufacturing an optical disk substrate according to the present invention step by step. 1... Soft photosensitive resin layer 2... Substrate 3... Laminate 4... Pressure roll 5... Transfer mold representative patent attorney Keisuke Norichika (1 person) % 1%, l η ゝ′ −1 ＼−
Claims (1)
層を転写用型の上に押圧しながら紫外線を照射して、そ
の後転写用型から樹脂層を基板ごと剥離することにより
、転写用型上に形成されて1) A soft resin layer that cures with ultraviolet rays provided on a flat substrate is irradiated with ultraviolet rays while being pressed onto a transfer mold, and then the resin layer is peeled off from the transfer mold together with the substrate to perform the transfer. formed on the mold
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP625684A JPS60151851A (en) | 1984-01-19 | 1984-01-19 | Duplicating method of optical disk substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP625684A JPS60151851A (en) | 1984-01-19 | 1984-01-19 | Duplicating method of optical disk substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60151851A true JPS60151851A (en) | 1985-08-09 |
Family
ID=11633394
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP625684A Pending JPS60151851A (en) | 1984-01-19 | 1984-01-19 | Duplicating method of optical disk substrate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60151851A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0299073A1 (en) * | 1987-01-24 | 1989-01-18 | Dai Nippon Insatsu Kabushiki Kaisha | Optical recording medium and production thereof |
| US6585262B2 (en) | 2000-05-12 | 2003-07-01 | Nec Corporation | Conveying interval adjusting method and apparatus |
-
1984
- 1984-01-19 JP JP625684A patent/JPS60151851A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0299073A1 (en) * | 1987-01-24 | 1989-01-18 | Dai Nippon Insatsu Kabushiki Kaisha | Optical recording medium and production thereof |
| US6585262B2 (en) | 2000-05-12 | 2003-07-01 | Nec Corporation | Conveying interval adjusting method and apparatus |
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