JPS63307909A - Preparation of resin disc - Google Patents
Preparation of resin discInfo
- Publication number
- JPS63307909A JPS63307909A JP13719287A JP13719287A JPS63307909A JP S63307909 A JPS63307909 A JP S63307909A JP 13719287 A JP13719287 A JP 13719287A JP 13719287 A JP13719287 A JP 13719287A JP S63307909 A JPS63307909 A JP S63307909A
- Authority
- JP
- Japan
- Prior art keywords
- resin
- mold
- disk
- substrate
- curing
- 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
- 239000011347 resin Substances 0.000 title claims abstract description 87
- 229920005989 resin Polymers 0.000 title claims abstract description 87
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 238000004519 manufacturing process Methods 0.000 claims description 16
- 239000000758 substrate Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 8
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 238000009792 diffusion process Methods 0.000 claims description 2
- 230000003287 optical effect Effects 0.000 abstract description 8
- 238000003825 pressing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000010894 electron beam technology Methods 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の分野〕
本発明は光ディスクや薄い円板状レンズ等の面上に微細
なパターンを有する樹脂円板の製造方法に関するもので
ある。DETAILED DESCRIPTION OF THE INVENTION [Field of the Invention] The present invention relates to a method for manufacturing a resin disk having a fine pattern on the surface of an optical disk, a thin disk-shaped lens, or the like.
（従来技術とその問題点〕
（従来技術）
光ディスクや平板状のレンズ等では樹脂円板の少なくと
も一方の面に微細な凹凸パターンを転写する必要がある
。このような微細な樹脂円板等を製造するために射出成
形機を用いた方法と、金型上に樹脂を均一に広げて製造
する方法が提案されている。後者の方法は例えば特開昭
５３−１１６１０５号に示されているように、第４図に
示す金型台ｌに保持されている金型２上に樹脂３を注入
し、上部より湾曲するように保持された円形の基板４を
押圧して樹脂を均一に広げて転写し切断する方法が知ら
れている。又特開昭５５−１５２０２８号に示されてい
るように、第５図に示す金型台５上に保持されている金
型６の下方より樹脂７を注入して基板８及び押さえ板９
で押圧して樹脂円板を形成する方法が提案されている。(Prior art and its problems) (Prior art) For optical discs, flat lenses, etc., it is necessary to transfer a fine uneven pattern to at least one surface of a resin disk. For manufacturing, a method using an injection molding machine and a method of manufacturing by uniformly spreading resin on a mold have been proposed. Then, resin 3 is injected onto the mold 2 held on the mold table l shown in Fig. 4, and the resin is spread uniformly by pressing the circular substrate 4 held in a curved manner from the top. A method of transferring and cutting is known.Also, as shown in Japanese Patent Application Laid-Open No. 55-152028, resin 7 is is injected into the substrate 8 and the holding plate 9.
A method has been proposed in which a resin disk is formed by pressing with
（発明が解決しようとする問題点）
しかしながらこのような従来の製造方法では、樹脂を金
型の上面に均一に展開するために樹脂を押圧するように
していた。その際には樹脂の膜厚を一定にしたり樹脂の
中に気泡が発生しないようにする必要がある。又樹脂の
種類によって樹脂を均一に押圧する条件が異なるため、
膜厚を一定にすることが困難であった。又荷重をかけて
樹脂を押し広げるために、樹脂の光学的な特性が不均一
となり例えば複屈折を生じる恐れがあるという問題点が
あった。(Problems to be Solved by the Invention) However, in such conventional manufacturing methods, the resin is pressed in order to spread the resin uniformly on the upper surface of the mold. In this case, it is necessary to keep the resin film thickness constant and to prevent air bubbles from forming in the resin. Also, since the conditions for uniformly pressing the resin differ depending on the type of resin,
It was difficult to keep the film thickness constant. Furthermore, since the resin is spread out by applying a load, there is a problem that the optical properties of the resin may become non-uniform and, for example, birefringence may occur.
本発明はこのような従来の製造方法の問題点に鑑みてな
されたものであって、樹脂を押圧することなく均一な光
学的性質を有する記録媒体や光レンズ等の樹脂円板を製
造することを技術的課題とする。The present invention has been made in view of the problems of the conventional manufacturing method, and it is an object of the present invention to manufacture resin disks for recording media, optical lenses, etc. that have uniform optical properties without pressing the resin. is a technical issue.
（問題点を解決するための手段）
本発明は円板上に所定のパターンを形成する樹脂円板の
製造方法であって、第１図に示すように、回転板上に保
持されその上面に複製されるべき凹凸を有する円形の金
型の中央部上面より樹脂を注入する注入工程と、回転板
を回転させることによって金型上に注入された樹脂を金
型の上面に拡散させる拡散工程と、拡散された樹脂上に
円形の基板を載置し樹脂を硬化させる硬化工程と、を有
することを特徴とするものである。(Means for Solving the Problems) The present invention is a method for manufacturing a resin disk in which a predetermined pattern is formed on the disk, and as shown in FIG. An injection step in which resin is injected from the upper surface of the central part of a circular mold having irregularities to be replicated, and a diffusion step in which the resin injected onto the mold is diffused to the upper surface of the mold by rotating a rotary plate. , and a curing step of placing a circular substrate on the diffused resin and curing the resin.
（作用）
このような特徴を有する本発明によれば、上面に複製さ
れるべき凹凸を有する円板状の金型を回転板上に保持し
、その上面に樹脂を注入し、金型をモータを駆動して回
転させるようにしている。(Function) According to the present invention having such characteristics, a disk-shaped mold having irregularities to be reproduced on the upper surface is held on a rotating plate, resin is injected into the upper surface, and the mold is driven by a motor. It is driven and rotated.
そうすれば樹脂が金型の中心より周囲に向かって流出す
る。従ってその回転速度を制御することにより均一な膜
厚の樹脂とすることができる。そしてその上面より基板
を重ねて展開された樹脂を硬化させる。その後金型より
基板と基板上に形成された樹脂を剥離することによって
樹脂円板を製造する。This causes the resin to flow out from the center of the mold toward the periphery. Therefore, by controlling the rotation speed, a resin having a uniform thickness can be obtained. Then, the substrates are stacked on top of each other and the developed resin is cured. Thereafter, a resin disk is manufactured by peeling off the substrate and the resin formed on the substrate from the mold.
（発明の効果）
そのため本発明によれば、回転板の回転速度を制御する
ことによって樹脂の膜厚を制御し、樹脂を金型上に均一
に展開することができる。従って基板を金型に押圧する
必要がなく樹脂を金型上に容易に塗布を行うことができ
る。又樹脂を展開する際にはあまり外力が加わらないた
め、樹脂中に気泡が発生することがなく、光学的特性が
良い樹脂円板を製造することができ゛る。(Effects of the Invention) Therefore, according to the present invention, the film thickness of the resin can be controlled by controlling the rotational speed of the rotating plate, and the resin can be uniformly spread on the mold. Therefore, there is no need to press the substrate against the mold, and the resin can be easily applied onto the mold. Further, since not much external force is applied when the resin is expanded, bubbles are not generated in the resin, and a resin disk with good optical properties can be manufactured.
第２図は本発明の一実施例による樹脂円板の製造に用い
られる装置を示す斜視図である。本図に示すようにモー
タ１１には回転軸１２を介して回転板１３が取付けられ
ている。回転板１３は複製する金型１４を保持するもの
である。金型１４の上面には複製すべき凹凸のパターン
があらかじめ形成されている。即ちこの樹脂円板を光デ
ィスクやコンパクトディスク等の樹脂円板とすると金型
１４はその元となる凹凸のパターンを記録したものであ
り、樹脂円板を平板型のフレネルレンズ等のレンズとす
るとそのレンズの形状を有する金型とする。さて樹脂円
板の製造時にはまず第１図（ａ）に示すように図示しな
い樹脂供給源より樹脂注入孔１５から供給された樹脂を
この金型１４の中心位置に一定量の樹脂１６を注入する
。ここで注入する樹脂としては例えば紫外線を照射した
ときに硬化する紫外線硬化樹脂を用いるものとする。そ
の注入を終えると第１図（ｂ）に示すようにモータ１１
を駆動して回転板１３及びその上部の金型１４を樹脂１
６と共に回転させる。ここで最初は金型１４の上面に樹
脂を全体に広げるために比較的低い速度で回転させる。FIG. 2 is a perspective view showing an apparatus used for manufacturing a resin disk according to an embodiment of the present invention. As shown in this figure, a rotating plate 13 is attached to the motor 11 via a rotating shaft 12. The rotary plate 13 holds a mold 14 to be duplicated. An uneven pattern to be replicated is previously formed on the upper surface of the mold 14. That is, if this resin disk is used as a resin disk for an optical disk or a compact disk, the mold 14 records the original uneven pattern, and if the resin disk is used as a flat Fresnel lens or other lens, the mold 14 records the uneven pattern. A mold having the shape of a lens is made. When manufacturing a resin disk, first, as shown in FIG. 1(a), a certain amount of resin 16 is injected into the center of the mold 14 using resin supplied from a resin supply source (not shown) through the resin injection hole 15. . The resin to be injected here is, for example, an ultraviolet curing resin that hardens when irradiated with ultraviolet light. When the injection is finished, the motor 11 as shown in Fig. 1(b)
is driven to rotate the rotary plate 13 and the mold 14 on top of the resin 1.
Rotate with 6. At first, the mold 14 is rotated at a relatively low speed in order to spread the resin over the entire upper surface.
そうすれば遠心力によって樹脂１６が金型１４の周辺に
徐々に拡がっていく。Then, the resin 16 gradually spreads around the mold 14 due to centrifugal force.
従って金型１４の上面の全体に樹脂を拡げた後高速回転
を行い膜厚を均一にする。ここで回転数は第３図に示す
ように膜厚に対応しているため所望の膜厚となる回転数
を選択する。樹脂の表面の色彩は膜厚によって異なるた
めその膜厚の色彩が得られれば回転を停止する。その後
第１図（Ｃ）に示すように樹脂の上面より透明基板１７
を乗せ紫外光源１８を用いて透明基板１７の上面より紫
外線を照射して樹脂を硬化させる。そうすれば金型１４
の凹凸に対応した形状の樹脂とすることができる。Therefore, after the resin is spread over the entire upper surface of the mold 14, it is rotated at high speed to make the film thickness uniform. Here, since the rotation speed corresponds to the film thickness as shown in FIG. 3, the rotation speed that provides the desired film thickness is selected. Since the color of the resin surface varies depending on the film thickness, the rotation is stopped when the color corresponding to the film thickness is obtained. After that, as shown in FIG. 1(C), the transparent substrate 17 is removed from the upper surface of the resin.
The resin is cured by irradiating ultraviolet light from the upper surface of the transparent substrate 17 using the ultraviolet light source 18. Then mold 14
The resin can be shaped to correspond to the unevenness of the surface.
そして第１図（ｄ）に示すように透明基板１７と共に金
型１４より硬化した樹脂１６を剥離して樹脂円板を得る
。Then, as shown in FIG. 1(d), the cured resin 16 is peeled off from the mold 14 together with the transparent substrate 17 to obtain a resin disk.
尚本実施例では樹脂として紫外線硬化樹脂を用いている
が、電子ビームで硬化する樹脂を用い、基板の上面より
電子ビームを照射しても同様の効果が得られることはい
うまでもない。In this embodiment, an ultraviolet curable resin is used as the resin, but it goes without saying that the same effect can be obtained by using a resin that is cured by an electron beam and irradiating the electron beam from the top surface of the substrate.
第１図は本発明の一実施例による樹脂円板の製造過程を
示す図、第２図は本実施例による樹脂円板の製造装置を
示す斜視図、第３図は樹脂の膜厚と回転数の関係を示す
グラフ、第４図は従来の樹脂円板の製造装置を示す図、
第５図は従来の他の製造装置を示す断面図である。
１１−８８．、−モータ １３・−−−−−一回転板
１４−−−−−−金型 １６−・−・・・樹脂
１７・・・・−透明基板特許出願人 立石電機株
式会社
代理人 弁理士 岡本官喜（他１名）
寸ｎ 寸哨
第２図
第３図
回転ｔ１
（Ｘ１０００ｒｐｍ）Fig. 1 is a diagram showing the manufacturing process of a resin disk according to an embodiment of the present invention, Fig. 2 is a perspective view showing a resin disk manufacturing apparatus according to the present embodiment, and Fig. 3 is a diagram showing the resin film thickness and rotation. A graph showing the relationship between numbers, FIG. 4 is a diagram showing a conventional resin disk manufacturing apparatus,
FIG. 5 is a sectional view showing another conventional manufacturing apparatus. 11-88. , -Motor 13・------One rotating plate 14---Mold 16---Resin
17...-Transparent substrate patent applicant Tateishi Electric Co., Ltd. agent Patent attorney Kanki Okamoto (and one other person) Dimensions Figure 2 Figure 3 Rotation t1 (X1000rpm)
Claims (2)
造方法であって、 回転板上に保持されその上面に複製されるべき凹凸を有
する円形の金型の中央部上面より樹脂を注入する注入工
程と、 前記回転板を回転させることによって金型上に注入され
た樹脂を前記金型の上面に拡散させる拡散工程と、 前記拡散された樹脂上に円形の基板を載置し前記樹脂を
硬化させる硬化工程と、を有することを特徴とする樹脂
円板の製造方法。(1) A method for manufacturing a resin disk in which a predetermined pattern is formed on the disk, the resin being poured from the upper surface of the central part of a circular mold held on a rotating plate and having unevenness to be replicated on its upper surface. an injection step of injecting the resin; a diffusion step of diffusing the resin injected onto the mold onto the upper surface of the mold by rotating the rotary plate; and a step of placing a circular substrate on the diffused resin. A method for manufacturing a resin disk, comprising: a curing step of curing the resin.
明基板であり、前記硬化工程は基板の上面より紫外光を
照射することによって樹脂を硬化させる工程であること
を特徴とする特許請求の範囲第１項記載の樹脂円板の製
造方法。(2) The resin is an ultraviolet curing resin, the substrate is a transparent substrate, and the curing step is a step of curing the resin by irradiating ultraviolet light from the upper surface of the substrate. A method for manufacturing a resin disk according to scope 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13719287A JPS63307909A (en) | 1987-05-29 | 1987-05-29 | Preparation of resin disc |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13719287A JPS63307909A (en) | 1987-05-29 | 1987-05-29 | Preparation of resin disc |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63307909A true JPS63307909A (en) | 1988-12-15 |
Family
ID=15192950
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13719287A Pending JPS63307909A (en) | 1987-05-29 | 1987-05-29 | Preparation of resin disc |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63307909A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06320550A (en) * | 1993-03-12 | 1994-11-22 | Microparts G Fuer Mikrostrukturtechnik Mbh | Production of fine structure and fine structure obtained by said method |
| JP2010158889A (en) * | 2008-12-19 | 2010-07-22 | Andreas Hettich Gmbh & Co Kg | Device and method for producing molded body having microstructure |
-
1987
- 1987-05-29 JP JP13719287A patent/JPS63307909A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06320550A (en) * | 1993-03-12 | 1994-11-22 | Microparts G Fuer Mikrostrukturtechnik Mbh | Production of fine structure and fine structure obtained by said method |
| JP2010158889A (en) * | 2008-12-19 | 2010-07-22 | Andreas Hettich Gmbh & Co Kg | Device and method for producing molded body having microstructure |
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