JPH01220156A - Manufacturing instrument for substrate for optical disk - Google Patents
Manufacturing instrument for substrate for optical diskInfo
- Publication number
- JPH01220156A JPH01220156A JP4415188A JP4415188A JPH01220156A JP H01220156 A JPH01220156 A JP H01220156A JP 4415188 A JP4415188 A JP 4415188A JP 4415188 A JP4415188 A JP 4415188A JP H01220156 A JPH01220156 A JP H01220156A
- Authority
- JP
- Japan
- Prior art keywords
- stamper
- injection nozzle
- substrate
- resin
- outer peripheral
- 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
- 239000000758 substrate Substances 0.000 title claims description 30
- 230000003287 optical effect Effects 0.000 title claims description 20
- 238000004519 manufacturing process Methods 0.000 title claims description 14
- 239000011347 resin Substances 0.000 claims abstract description 34
- 229920005989 resin Polymers 0.000 claims abstract description 34
- 238000000465 moulding Methods 0.000 claims abstract description 11
- 238000002347 injection Methods 0.000 claims description 28
- 239000007924 injection Substances 0.000 claims description 28
- 229920003002 synthetic resin Polymers 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims 5
- 239000000057 synthetic resin Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 13
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 10
- 229910052759 nickel Inorganic materials 0.000 description 5
- 239000010453 quartz Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000016 photochemical curing Methods 0.000 description 2
- 239000012956 1-hydroxycyclohexylphenyl-ketone Substances 0.000 description 1
- OMIGHNLMNHATMP-UHFFFAOYSA-N 2-hydroxyethyl prop-2-enoate Chemical compound OCCOC(=O)C=C OMIGHNLMNHATMP-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- 239000005058 Isophorone diisocyanate Substances 0.000 description 1
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- IAXXETNIOYFMLW-COPLHBTASA-N [(1s,3s,4s)-4,7,7-trimethyl-3-bicyclo[2.2.1]heptanyl] 2-methylprop-2-enoate Chemical compound C1C[C@]2(C)[C@@H](OC(=O)C(=C)C)C[C@H]1C2(C)C IAXXETNIOYFMLW-COPLHBTASA-N 0.000 description 1
- MPIAGWXWVAHQBB-UHFFFAOYSA-N [3-prop-2-enoyloxy-2-[[3-prop-2-enoyloxy-2,2-bis(prop-2-enoyloxymethyl)propoxy]methyl]-2-(prop-2-enoyloxymethyl)propyl] prop-2-enoate Chemical compound C=CC(=O)OCC(COC(=O)C=C)(COC(=O)C=C)COCC(COC(=O)C=C)(COC(=O)C=C)COC(=O)C=C MPIAGWXWVAHQBB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- MQDJYUACMFCOFT-UHFFFAOYSA-N bis[2-(1-hydroxycyclohexyl)phenyl]methanone Chemical compound C=1C=CC=C(C(=O)C=2C(=CC=CC=2)C2(O)CCCCC2)C=1C1(O)CCCCC1 MQDJYUACMFCOFT-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000007429 general method Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 229940119545 isobornyl methacrylate Drugs 0.000 description 1
- NIMLQBUJDJZYEJ-UHFFFAOYSA-N isophorone diisocyanate Chemical compound CC1(C)CC(N=C=O)CC(C)(CN=C=O)C1 NIMLQBUJDJZYEJ-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 125000005395 methacrylic acid group Chemical group 0.000 description 1
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 239000002952 polymeric resin Substances 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 229920006295 polythiol Polymers 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は画像、情報などを保管、記録、再生する光ディ
スク用基板に関するものであり、特にその製造装置に関
する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical disc substrate for storing, recording, and reproducing images, information, etc., and particularly relates to an apparatus for manufacturing the same.
デジタルオーディオディスク、ビデオディスク、追記型
光ディスクなどに用いる光ディスク用基板は、厚さ約１
龍の透明板の表面に、溝やピットなど情報パターンを形
成して成っている。Optical disc substrates used for digital audio discs, video discs, write-once optical discs, etc. have a thickness of approximately 1.
It consists of information patterns such as grooves and pits formed on the surface of the dragon's transparent plate.
これらの光ディスク用基板を形成するのには、従来から
以下の様な方法が知られている。即ち、〈１〉溝やピッ
トなど情報パターンを有する金属製スタンパを配置した
金型内に、ポリカーボネート、ポリメチルメタクリレー
トなどの高分子材料を射出、成形する方法〔日経メカニ
カルＰ３４（１９８２−２−１） 、日経エレクトロニ
クスＰ１３３（１９８２−６−７） ）。Conventionally, the following methods have been known for forming these optical disk substrates. That is, <1> A method of injecting and molding a polymeric material such as polycarbonate or polymethyl methacrylate into a mold in which a metal stamper having an information pattern such as a groove or pit is placed [Nikkei Mechanical P34 (1982-2-1) ), Nikkei Electronics P133 (1982-6-7)).
く２〉予め用意した透明支持板の表面に、情報パターン
付の光硬化性樹脂薄膜を付着せしむる方法（特開昭５３
−８６７５６、特開昭５５−１５２０２８）。2) A method of attaching a photocurable resin thin film with an information pattern to the surface of a transparent support plate prepared in advance (Japanese Patent Laid-Open No. 53
-86756, JP-A-55-152028).
く３〉情報パターンを有するスタンパと、パターンの無
い平板とを対向させて出来る空間に熱硬化性樹脂もしく
は光硬化性樹脂を注入後、加熱及び光照射により樹脂を
硬化せしめ、スタンパと平板を取り除き樹脂硬化物から
なる情報パターン付き透明基板を得る方法。3> After injecting a thermosetting resin or a photocurable resin into the space created by facing a stamper with an information pattern and a flat plate without a pattern, the resin is cured by heating and light irradiation, and the stamper and flat plate are removed. A method for obtaining a transparent substrate with an information pattern made of a cured resin.
である。It is.
ところが、く１〉により得られる光ディスク用基板は、
高分子材料が流動、固化する際に生ずる分子配向を完全
に除去するのが難しいため、基板内に光学的異方性を生
じ易く、また、情報パターンの形状がスタンパから基板
に忠実に転写されにくいため、光ディスクの動作時特性
が低下する傾向にあった。However, the optical disc substrate obtained by 1)
Because it is difficult to completely remove the molecular orientation that occurs when a polymer material flows and solidifies, optical anisotropy tends to occur within the substrate, and the shape of the information pattern is not faithfully transferred from the stamper to the substrate. Therefore, the operating characteristics of the optical disc tended to deteriorate.
く２〉の方法により得られる光ディスク用基板は、予め
透明支持体を製造しておかねばならないため、工程が複
雑となり、高価格となる傾向があった。The optical disc substrate obtained by method (2) requires a transparent support to be manufactured in advance, which tends to complicate the process and increase the price.
く３〉の方法ではく１〉及びく２〉の方法の欠点を解決
できる可能性を持つが、従来の方法では以下に述べるよ
うな問題があった。Although method (3) has the potential to solve the drawbacks of methods (1) and (2), the conventional methods have the following problems.
即ち、一般的なく３〉の方法においては、第４図に示す
ように平板（透明板）１と情報パターン付スタンパ２を
外周リング３を介して向かい合わせに配置した型の空間
の中へ、注入ノズル７より熱硬化性樹脂又は光硬化性樹
脂を充填し、全体を加熱するかもしくは平板１及びスタ
ンパ２の少なくともどちらか一方から光を照射して硬化
させる。That is, in the general method (3), as shown in FIG. A thermosetting resin or a photocuring resin is filled through the injection nozzle 7 and cured by heating the entire body or by irradiating light from at least one of the flat plate 1 and the stamper 2.
ここで一般的に使用されるアクリレート、メタクリレー
ト、ポリチオール、エポキシなどの重合性樹脂は、粘度
が射出成形用樹脂と比べ低く、流動性が高いため、型内
への充填時に直径０．０１〜１ｆｌ程度の泡を巻き込み
易く、それがディスク動作時のドロップアウトの原因と
なる。The polymeric resins commonly used here, such as acrylate, methacrylate, polythiol, and epoxy, have a lower viscosity than injection molding resins and have high fluidity, so when filled into the mold, the diameter is 0.01 to 1 fl. It is easy to entrain some bubbles, which causes dropouts during disk operation.
この問題を解決する試みとして
〈１〉樹脂注入時、注入口をスタンパと同じ高さまで降
下させ充填する方法
〈２〉型全体を減圧する方法
などが行われていた。Attempts to solve this problem include (1) a method in which the injection port is lowered to the same height as the stamper during resin injection, and (2) a method in which the entire mold is depressurized.
しかし、これらの方法によると、
〈１〉の方法では摺動部に樹脂が侵入し、パリが発生す
る。However, according to these methods, in the method <1>, the resin invades the sliding part and causes flakes.
く２〉の方法では機構が複雑になり、また、真空度を上
げ過ぎると樹脂中の可溶ガスや低沸点成分がガス化し、
新たな気泡を生じ易く、真空度を下げ過ぎると樹脂充填
時巻き込んだ気泡が無くならないという問題があった。In method 2), the mechanism becomes complicated, and if the degree of vacuum is increased too much, soluble gases and low boiling point components in the resin will gasify.
New air bubbles are likely to be generated, and if the degree of vacuum is lowered too much, there is a problem that air bubbles trapped during resin filling will not disappear.
尚、図中、３は外周リング、４は光硬化性樹脂、５は樹
脂溜まり空間、６は光源、８は注入弁、１０はノツチ、
１８は接着剤を示す。In the figure, 3 is an outer ring, 4 is a photocurable resin, 5 is a resin reservoir space, 6 is a light source, 8 is an injection valve, 10 is a notch,
18 indicates an adhesive.
尚、ノツチ１０は、その部分の樹脂厚みを薄くして円形
に切欠き成形し易くするために設けである。Note that the notch 10 is provided to reduce the thickness of the resin at that portion to facilitate cutting and molding into a circular shape.
この発明は上記の問題点を解決するためになされたもの
で、気泡混入によるドロップアウト等の発生しない記録
再生特性の良い光ディスク基板を簡易−に製造すること
が出来る製造装置を提供することを目的としたものであ
る。This invention was made in order to solve the above-mentioned problems, and an object of the present invention is to provide a manufacturing apparatus that can easily manufacture an optical disk substrate with good recording and reproducing characteristics that does not cause dropouts due to air bubbles. That is.
上記目的は、情報パターン付スタンパもしくは平板に嵌
め込んだ注入ノズル及び外周リングの少なくともどちら
か一方の、成形空間と接する側面がスタンパもしくは平
板と成す角を９０°とせずに、丸みを付けておくか、又
は傾斜を設けることにより、樹脂の成形空間への流れ込
みを円滑にして、注入ノズル側面での空気巻き込み及び
外周リングでの気泡残留を防止することにより達成され
る。尚、この場合、丸み、傾斜は必ずしも注入ノズル、
外周リングに直接設ける必要がなく、これらに連設され
るリング部材に設けても良い。The above purpose is to make the angle between the stamper with an information pattern or the stamper or the flat plate not 90 degrees but rounded by the side surface that contacts the molding space of at least one of the injection nozzle fitted into the flat plate and the outer circumferential ring. Alternatively, by providing a slope, the flow of the resin into the molding space is smoothed, and this is achieved by preventing air entrainment on the side surface of the injection nozzle and air bubbles remaining in the outer ring. In this case, the roundness and slope do not necessarily correspond to the injection nozzle,
It is not necessary to provide it directly on the outer circumferential ring, but it may be provided on a ring member that is connected to these.
以下、実施例により詳しく説明する。 Hereinafter, this will be explained in detail with reference to Examples.
実施例１
第１図Ｔａ）に示す様に、厚さ１０ｎ、外径１８０寵の
石英平板１と、内径１７ｆｌ、外径１２８ｎのニッケル
製スタンパ２とを１．３鰭の間隔を保って向かい合わせ
に配置し、高さ１．２１ｍ、外径１５ｍのノツチ１０よ
り外側に幅１鶴の段差を持ち、ノズル側面１１と段差の
接する部分に半径０．４鶴の丸み部９を付けた注入ノズ
ル７と、高さ１．２鰭、内径１３０龍のノツチ１０の内
側に幅１龍の段差を持ち、外周リング側面１２と段差の
接する部分に半径０．４鶴の丸み部９を付けた外周リン
グ３をスタンパ２に嵌め込んだ型を作成した。Example 1 As shown in Fig. 1 (Ta), a quartz flat plate 1 with a thickness of 10 nm and an outer diameter of 180 mm and a nickel stamper 2 with an inner diameter of 17 fl and an outer diameter of 128 nm were placed facing each other with a distance of 1.3 fins. The injection molding device is placed in parallel with each other, has a step of 1 crane in width on the outside of the notch 10 with a height of 1.21 m and an outer diameter of 15 m, and has a rounded part 9 with a radius of 0.4 crane at the part where the step touches the nozzle side surface 11. There is a step with a width of 1 dragon on the inside of the nozzle 7 and a notch 10 with a height of 1.2 fins and an inner diameter of 130 dragons, and a rounded part 9 with a radius of 0.4 crane is attached to the part where the step touches the outer ring side surface 12. A mold was created in which the outer ring 3 was fitted into the stamper 2.
同図（ｂ）はこの様な製造装置により得られた光ディス
ク用基板を示す。FIG. 2B shows an optical disk substrate obtained by such a manufacturing apparatus.
実施例２
第２図に示す様に、厚さ１０鰭、外径１８０ｆｌの石英
平板１と、内径１５鶴、外径１３０鶴のニッケル製スタ
ンパ２とを１．３ ｔｓの間隔を保って向かい合わせに
配置し、高さ１．２ｆｌ、外径１４．４ｆｌのノツチ１
０を持ち、ノズル側面１１がスタンパ２と成す角度θ１
を１０５ａとした注入ノズル７と、裔さ１．２ｆｌ、内
径１３０．６ｍのノツチ１０を持ち、リング側面１２が
スタンパ２となす角度θ２を１０５”とした外周リング
３をスタンパ２に嵌め込んだ型を作成した。尚、θ２．
θ２はｔｏｏ’〜１３５’位が望ましい。Example 2 As shown in Fig. 2, a quartz flat plate 1 with a thickness of 10 fins and an outer diameter of 180 fl and a nickel stamper 2 with an inner diameter of 15 mm and an outer diameter of 130 fl are placed facing each other with an interval of 1.3 ts. Notch 1 with a height of 1.2 fl and an outer diameter of 14.4 fl.
0, and the angle θ1 that the nozzle side surface 11 forms with the stamper 2
An injection nozzle 7 with a diameter of 105a, a notch 10 with a prong length of 1.2 fl and an inner diameter of 130.6 m, and an outer ring 3 with an angle θ2 of 105'' between the ring side surface 12 and the stamper 2 were fitted into the stamper 2. A mold was created.It should be noted that θ2.
θ2 is preferably in the range of too' to 135'.
第３図は変形例に係る要部拡大断面図を示すものであり
、注入ノズル自体に丸み部を形成する代わりに、丸み部
９を形成したリング部材１９を、この注入ノズル７に嵌
合しても良い。FIG. 3 shows an enlarged sectional view of a main part according to a modification, in which instead of forming a rounded part on the injection nozzle itself, a ring member 19 on which a rounded part 9 is formed is fitted into this injection nozzle 7. It's okay.
各実施例について、型内に注入ノズル７よりアクリル系
及びメタクリル系樹脂（ジペンタエリスリトールへキサ
アクリレート３０重景％、イソホロンジイソシアネート
１モルと２−ヒドロキシエチルアクリレート２モルとの
反応生成物４０重量％、イソボルニルメタクリレート２
９重量％、１−ヒドロキシシクロへキシルフェニルケト
ン１重量％）４を吐出速度０．８ｍｌ／ｓｅｅで注入し
、該光硬化性樹脂４が樹脂溜才り空間５に約半分入った
ところで、注入弁８を閉じ注入を止めた。樹脂粘度は２
５℃で約７０００ｃｐｓである。そして、光源６により
光硬化性樹脂４を硬化させた。次に、光硬化性樹脂の硬
化物を石英平板１とニッケルスタンパ２から外し、第１
図（ｂ）に示す情報パターン付の基板１３を得た。得ら
れた基板１３について基板中の直径０．１ ｍ以上の気
泡を百視により計数した。For each example, acrylic and methacrylic resins (30% by weight of dipentaerythritol hexaacrylate, 40% by weight of the reaction product of 1 mole of isophorone diisocyanate and 2 moles of 2-hydroxyethyl acrylate) were injected into the mold through the nozzle 7. , isobornyl methacrylate 2
9% by weight, 1% by weight of 1-hydroxycyclohexyl phenyl ketone) 4 was injected at a discharge rate of 0.8 ml/see, and when the photocurable resin 4 entered about half of the resin reservoir space 5, the injection was carried out. Valve 8 was closed to stop the injection. Resin viscosity is 2
It is about 7000 cps at 5°C. Then, the photocurable resin 4 was cured by the light source 6. Next, the cured photocurable resin is removed from the quartz flat plate 1 and the nickel stamper 2, and the first
A substrate 13 with an information pattern shown in Figure (b) was obtained. Regarding the obtained substrate 13, bubbles having a diameter of 0.1 m or more in the substrate were counted by visual inspection.
尚、比較例として第４図に示す前述した従来例の様に、
厚さ１０ｍの石英平板１と、内径１５ｆｌ、外系１３０
＋ｎのニッケルスタンパ２とを１．３■の間隔を保って
向かい合わせに配置し、高さ１．２ｆｌ、外径１５ｍの
ノツチ１０を持ち、ノズル側面１１がスタンパ２となす
角度を９０″とした注入ノズル７と、高さ！、２１［ｌ
、内径１３０鶴のノツチ１０を持ち、リング側面１２が
スタンパ２となす角度を９０″とした外周リング３をス
タンパ２に嵌め込んだ型を作成し、同様の方法で基板を
作成し、混入した気泡の計数を行った。As a comparative example, like the conventional example shown in FIG. 4,
A quartz flat plate 1 with a thickness of 10 m, an inner diameter of 15 fl, an outer diameter of 130
+n nickel stampers 2 are placed facing each other with an interval of 1.3 cm, and have a notch 10 with a height of 1.2 fl and an outer diameter of 15 m, and the angle between the nozzle side surface 11 and the stamper 2 is 90''. injection nozzle 7 and the height!, 21[l
A mold was made in which an outer ring 3 having a notch 10 with an inner diameter of 130mm and an angle of 90'' between the ring side surface 12 and the stamper 2 was fitted into the stamper 2, and a substrate was prepared in the same manner and mixed. Bubbles were counted.
成型した基板各１０枚についての平均値を下表に示す。The average values for each of the 10 molded substrates are shown in the table below.
比較例においては、第５図（ａｌに示す様に吐出開始時
注入ノズル７より吐出した光硬化性樹脂４がスタンパ２
と接する際、注入ノズル７とスタンパ２の境界部に残留
空気１５が生じ、それが成形空間への樹脂注入中、樹脂
流れ１７により成形空間１４に運ばれ、気泡１６を形成
する〔第５図（ｂ））。In the comparative example, as shown in FIG.
When the injection nozzle 7 and the stamper 2 come into contact with each other, residual air 15 is generated at the boundary between the injection nozzle 7 and the stamper 2, and during resin injection into the molding space, it is carried into the molding space 14 by the resin flow 17 and forms air bubbles 16 (Fig. 5). (b)).
更に、外周においても第５図（Ｃ１に示す様に、光硬化
樹脂４が外周リング３と接する際、その境界部に残留空
気１５が発生し、大きな気泡となる。Further, at the outer periphery, as shown in FIG. 5 (C1), when the photocuring resin 4 comes into contact with the outer ring 3, residual air 15 is generated at the boundary and becomes large bubbles.
この外周部における気泡は、基板Ｉ３の記録再生特性に
は影響しないものの外観上問題となるのみではなく、落
下時の基板破壊を起こし易くする。Although the bubbles in the outer circumferential portion do not affect the recording/reproducing characteristics of the substrate I3, they not only pose a problem in terms of appearance, but also make the substrate more likely to break when dropped.
これに対し、実施例１では注入ノズル７及び外周リング
３の側面に丸み部９を付けてあり、実施例２では注入ノ
ズル７及び外周りング３の側面を傾斜（テーパー）させ
たことで樹脂の流れ込みが円滑になり、境界部での空気
残留を防止し、気泡数を激減させることができた。On the other hand, in Example 1, a rounded part 9 is attached to the side surface of the injection nozzle 7 and the outer ring 3, and in Example 2, the side surface of the injection nozzle 7 and the outer ring 3 is sloped (tapered), so that the resin The flow of air became smoother, air remained at the boundary, and the number of air bubbles was drastically reduced.
尚、本実施例では光硬化性樹脂を用い基板を成形したが
、本発明は熱硬化性樹脂を用いた成形に対しても適用で
きる。In this example, the substrate was molded using a photocurable resin, but the present invention can also be applied to molding using a thermosetting resin.
更に本実施例では注入ノズル７及び外周リング３をニッ
ケルスタンパ２に嵌め込んだ成形型を用いたが、本発明
は平板ｌに注入ノズル７及び外周リング３を嵌め込んだ
成形型に対しても適用できる。Further, in this embodiment, a mold in which the injection nozzle 7 and the outer ring 3 were fitted into the nickel stamper 2 was used, but the present invention can also be applied to a mold in which the injection nozzle 7 and the outer ring 3 are fitted into the flat plate 1. Applicable.
以上説明した様に、本発明によれば、ドロップアウトの
起きない記録再生特性に優れた光ディスク用基板を高速
且つ低価格で供給することが可能である。As described above, according to the present invention, it is possible to supply an optical disc substrate with excellent recording and reproducing characteristics without dropout at high speed and at low cost.
第１図（ａｌは本発明の第１の実施例に係る光ディスク
用基板の製造装置の縦断面図、同図（ｂ）は光ディスク
用基板の縦断面図、第２図は第２の実施例に係る光ディ
スク用基板の製造装置の縦断面図、第３図は第１の実施
例の変形例を示す要部拡大縦断面図、第４図は従来例に
係る製造装置の縦断面図、第５図ｆａｔ〜（Ｃ）は従来
の製造装置を用いた際の気泡発生の機構を示す要部断面
図、第５図！ｄ）は従来の製造装置で得られた基板の断
面図である。
１・・・透明板、２・・・スタンパ、３・・・外周リン
グ、４・・・光硬化性樹脂、５・・・樹脂溜まり空間、
６・・・光源、７・・・注入ノズル、８・・・注入弁、
９・・・丸み部、１０・・・ノツチ、１１・・・ノズル
側面、１２・・・外ＬＪリング側面、１３・・・光ディ
スク用基板、１４・・・成形空間、１５・・・残留空気
、１６・・・気泡、１７・・・樹脂流れ、１９・・・リ
ング部材。
第１図
（ａ）
（ｂ）
゛ ＼
第２図
１月い
第３図
第４図
第５図
（Ｑ）
＋６ （ｂ）
＼
１６（ｄ）FIG. 1 (al is a vertical cross-sectional view of an optical disk substrate manufacturing apparatus according to the first embodiment of the present invention, FIG. 1 (b) is a vertical cross-sectional view of the optical disk substrate, and FIG. FIG. 3 is an enlarged longitudinal sectional view of a main part showing a modification of the first embodiment, and FIG. 4 is a vertical sectional view of a manufacturing apparatus according to a conventional example. Figures 5(c) and 5(c) are cross-sectional views of essential parts showing the bubble generation mechanism using the conventional manufacturing apparatus, and Figure 5!d) is a cross-sectional view of the substrate obtained using the conventional manufacturing apparatus. DESCRIPTION OF SYMBOLS 1... Transparent plate, 2... Stamper, 3... Outer ring, 4... Photocurable resin, 5... Resin reservoir space,
6... Light source, 7... Injection nozzle, 8... Injection valve,
9... Rounded part, 10... Notch, 11... Nozzle side surface, 12... Outer LJ ring side surface, 13... Optical disc substrate, 14... Molding space, 15... Residual air , 16... Air bubbles, 17... Resin flow, 19... Ring member. Figure 1 (a) (b) ゛ \ Figure 2 January Figure 3 Figure 4 Figure 5 (Q) +6 (b) \ 16 (d)
Claims (1)
い平板とを対向させて配置し、スタンパと平板の少なく
ともどちらか一方に注入ノズル及び外周リングの少なく
ともどちらか一方を嵌め込み、注入ノズルより未硬化の
合成樹脂を成形空間に充填し、樹脂を硬化させ、情報パ
ターン付き基板を得る光ディスク用基板の製造装置にお
いて、注入ノズル側及び外周リング側の少なくともどち
らか一方の、成形空間と接する側面の、嵌め込まれたス
タンパ又は平板との境界部に空気逃がし部を設けたこと
を特徴とする光ディスク用基板の製造装置。 （２）前記空気逃がし部とは注入ノズル側面又は外周リ
ング側面に直接形成された丸み部であることを特徴とす
る特許請求の範囲第（１）項記載の光ディスク用基板の
製造装置。（３）前記空気逃がし部とは注入ノズル側面
又は外周リング側面に直接形成されたテーパー部である
ことを特徴とする特許請求の範囲第（１）項記載の光デ
ィスク用基板の製造装置。 （４）注入ノズル外周部に、前記空気逃がし部を形成し
たリング部材を嵌合したことを特徴とする特許請求の範
囲第（１）項記載の光ディスク用基板の製造装置。[Scope of Claims] (1) A stamper having an information pattern and a flat plate without a pattern are arranged facing each other, and at least one of an injection nozzle and an outer peripheral ring is fitted into at least one of the stamper and the flat plate, In an optical disc substrate manufacturing apparatus in which a molding space is filled with an uncured synthetic resin from an injection nozzle and the resin is cured to obtain a substrate with an information pattern, the molding space is formed on at least one of the injection nozzle side and the outer peripheral ring side. 1. An apparatus for manufacturing an optical disc substrate, characterized in that an air escape portion is provided at the boundary between the stamper or the flat plate fitted in the side surface that contacts the stamper. (2) The apparatus for manufacturing an optical disk substrate according to claim (1), wherein the air escape portion is a rounded portion formed directly on a side surface of an injection nozzle or a side surface of an outer peripheral ring. (3) The optical disc substrate manufacturing apparatus according to claim (1), wherein the air escape portion is a tapered portion formed directly on a side surface of an injection nozzle or a side surface of an outer peripheral ring. (4) The apparatus for manufacturing an optical disk substrate as set forth in claim (1), wherein a ring member having the air escape portion formed thereon is fitted to the outer peripheral portion of the injection nozzle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4415188A JPH01220156A (en) | 1988-02-29 | 1988-02-29 | Manufacturing instrument for substrate for optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4415188A JPH01220156A (en) | 1988-02-29 | 1988-02-29 | Manufacturing instrument for substrate for optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01220156A true JPH01220156A (en) | 1989-09-01 |
Family
ID=12683628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4415188A Pending JPH01220156A (en) | 1988-02-29 | 1988-02-29 | Manufacturing instrument for substrate for optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01220156A (en) |
-
1988
- 1988-02-29 JP JP4415188A patent/JPH01220156A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4897228A (en) | Method for producing optical disk base | |
| JPH10289489A (en) | Method and device for production of optical recording medium | |
| WO1995028705A1 (en) | Substrate for optical recording media and stamper for manufacturing substrate for optical recording media | |
| KR100438700B1 (en) | Method for forming reflection layer of a disc substrate, apparatus thereof, and disc substrate therefrom | |
| JP2001167472A (en) | Optical disk and its manufacturing method | |
| JPH01220156A (en) | Manufacturing instrument for substrate for optical disk | |
| JP2003501776A (en) | Optical disk mold tool to reduce edge wedge | |
| JPH01256044A (en) | Production of substrate for optical disk | |
| JPH01220155A (en) | Manufacture of substrate for optical disk | |
| JP2707501B2 (en) | Injection molding stamper | |
| JP3780640B2 (en) | Optical recording medium manufacturing apparatus and manufacturing method | |
| JP4185140B2 (en) | Equipment for optical disk spin coating | |
| JP3095763B2 (en) | Disc substrate molding stamper and disk substrate molding method | |
| JP2007265515A (en) | Optical recording medium and its manufacturing method | |
| JPH0211318A (en) | Production of optical disc base | |
| JP2008282525A (en) | Manufacturing method of optical disk | |
| JPH03293107A (en) | Manufacture of optical disc and mold therefor | |
| JPH06101141B2 (en) | Method for manufacturing substrate for optical disk | |
| JPH02198808A (en) | Method for preparing substrate for data recording medium and apparatus for cast-molding of said substrate | |
| JPS6399932A (en) | Manufacture of base for optical disk | |
| JPH03162920A (en) | Injection molding mold assembly for high density information recording and storing plastic disc | |
| JPH02128337A (en) | Production of substrate for optical information recording medium | |
| JPH04162224A (en) | Optical disk | |
| JPH04238130A (en) | Production of and casting mold for base body for information recording medium | |
| JPH0123842B2 (en) |