JPH02122445A - Production of optical disk substrate - Google Patents
Production of optical disk substrateInfo
- Publication number
- JPH02122445A JPH02122445A JP27585388A JP27585388A JPH02122445A JP H02122445 A JPH02122445 A JP H02122445A JP 27585388 A JP27585388 A JP 27585388A JP 27585388 A JP27585388 A JP 27585388A JP H02122445 A JPH02122445 A JP H02122445A
- Authority
- JP
- Japan
- Prior art keywords
- stamper
- clean air
- optical disk
- disk substrate
- information pits
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 16
- 239000000758 substrate Substances 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 238000007664 blowing Methods 0.000 claims abstract description 13
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 8
- 239000000057 synthetic resin Substances 0.000 claims abstract description 8
- 238000001746 injection moulding Methods 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 3
- 239000000428 dust Substances 0.000 abstract description 7
- 230000008021 deposition Effects 0.000 abstract 1
- 238000002347 injection Methods 0.000 abstract 1
- 239000007924 injection Substances 0.000 abstract 1
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004925 Acrylic resin Substances 0.000 description 1
- 239000003570 air Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1753—Cleaning or purging, e.g. of the injection unit
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/1701—Component parts, details or accessories; Auxiliary operations using a particular environment during moulding, e.g. moisture-free or dust-free
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection 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、レーザービーム等により記録および／または
再生することができる光ディスクに使用する光ディスク
基板の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method of manufacturing an optical disc substrate used for an optical disc that can be recorded and/or reproduced using a laser beam or the like.
（従来の技術）
従来、レーザービーム等により記録および／または再生
することができる光ディスクに使用する光ディスク基板
の製造方法として、微少な凹凸からなる情報ピットを形
成したスタンパ−を金型に装着し、ポリカーボネート、
ポリアクリル樹脂等の合成樹脂を射出成形して、スタン
パ−に形成した情報ピットが転写された光ディスク基板
を製造することが知られているが、この場合、スタンパ
−に異物、ゴミ、ホコリ等が付着していると、射出成形
により成形した光ディスク基板の表面に情報ピットが正
確に転写されず、信号再生時にエラーやドロップアウト
が発生する。(Prior Art) Conventionally, as a method of manufacturing an optical disk substrate used for an optical disk that can be recorded and/or reproduced by a laser beam or the like, a stamper on which information pits made of minute irregularities are formed is attached to a mold. polycarbonate,
It is known to manufacture optical disk substrates on which information pits formed on a stamper are transferred by injection molding synthetic resin such as polyacrylic resin, but in this case, foreign matter, dirt, dust, etc. may be deposited on the stamper. If it adheres, the information pits will not be accurately transferred to the surface of the optical disc substrate formed by injection molding, and errors and dropouts will occur during signal reproduction.
そこで、クリーンルームでスタンパ−を金型に装着し、
スタンパ−上面に極めて微量のクリーンエアーを流して
、スタンパ−上面に異物、ゴミ、ホコリ等が付着するの
を防止していた。Therefore, we attached the stamper to the mold in a clean room,
A very small amount of clean air is flowed over the top surface of the stamper to prevent foreign matter, dirt, dust, etc. from adhering to the top surface of the stamper.
（発明が解決しようとする課題）
しかしながら、上記従来の方法においては、スタンパ−
上面に付着した異物、ゴミ、ホコリ等の除去が充分でな
く、信号再生時にエラー、ドロップアウトが発生すると
いう問題点があった。(Problem to be Solved by the Invention) However, in the above conventional method, the stamper
There was a problem in that foreign matter, dirt, dust, etc. attached to the top surface were not removed sufficiently, resulting in errors and dropouts during signal reproduction.
く課題を解決するための手段）
本発明は、上記の課題に鑑み鋭意検討の結果なされたも
のであって、情報ピットを形成したスタンパ−を金型に
装着し、合成樹脂を射出成形し、スタンパ−に形成した
情報ピットを転写した光ディスク基板を製造する方法に
おいて、スタンパ−の上方に設けたクリーンエア吹出し
装置から、１０ｍ／秒以上の流速でクリーンエアをスタ
ンパ−上面に吹出させ、ついで合成樹脂を射出成形する
ことにより、スタンパ−上面に異物、ゴミ、ホコリが付
着するのを防止したものである。Means for Solving the Problems) The present invention has been made as a result of intensive studies in view of the above problems, and includes mounting a stamper in which information pits are formed in a mold, injection molding a synthetic resin, In a method for manufacturing an optical disk substrate having transferred information pits formed on a stamper, clean air is blown onto the top surface of the stamper at a flow rate of 10 m/sec or more from a clean air blowing device installed above the stamper, and then the synthesis is performed. By injection molding resin, foreign matter, dirt, and dust are prevented from adhering to the top surface of the stamper.
（実施例）
以下、本発明の光ディスク基板の製造方法を第１〜２図
に基づき詳細に説明する。(Example) Hereinafter, a method for manufacturing an optical disk substrate of the present invention will be explained in detail based on FIGS. 1 and 2.
第１図は金型に装着したスタンパ−上面に、クリーンエ
アー吹出し装置からクリーンエアーを吹出している状態
を示す断面図、第２図はクリーンエアの吹出しを停止し
て、金型を閉じた状態を示す断面図である。Figure 1 is a sectional view showing the state in which clean air is being blown from the clean air blowing device onto the top surface of the stamper attached to the mold, and Figure 2 is the state in which the blowing of clean air has been stopped and the mold is closed. FIG.
第１〜２図において、１は情報ピットが形成されたスタ
ンパ−であって、成形機の固定グイプレート２ａと移動
タイプレート２ｂ間には、固定金型３ａと移動金型３ｂ
が装着され、移動金型３ｂにはスタンパ−１がスタンパ
−押え具４ａとスタンパ−押えリング４ｂによって固定
されている。In FIGS. 1 and 2, 1 is a stamper in which information pits are formed, and between a fixed tie plate 2a and a movable tie plate 2b of the molding machine, a fixed die 3a and a movable die 3b are provided.
is attached, and the stamper 1 is fixed to the movable mold 3b by a stamper holder 4a and a stamper holder ring 4b.
５は射出成形機のノズルであって、該ノズル５がら合成
樹脂を射出し基板を成形する。5 is a nozzle of an injection molding machine, and synthetic resin is injected through the nozzle 5 to mold a substrate.
スタンパ−１の斜め上方には、クリーンエアー吹出し装
置６が設置され、スタンパ−１上面に向けてクリーンエ
アーを吹出す。クリーンエアーとしては、０−０３μｍ
のフィルターを通過した露点５°Ｃ以下の気体、例えば
空気、窒素、ヘリウム等を用い、スタンパ−１の表面に
対し、３０°の角度で吹出させる。スタンパ−１の表面
での風速は１０ｍ／秒以上とする。これは１０ｍ／秒以
下の風速では異物、ゴミ、ホコリ等は充分除去されない
なめである。A clean air blowing device 6 is installed obliquely above the stamper 1, and blows clean air toward the upper surface of the stamper 1. For clean air, 0-03μm
A gas having a dew point of 5° C. or less, such as air, nitrogen, helium, etc., which has passed through a filter, is blown out at an angle of 30° to the surface of the stamper 1. The wind speed on the surface of the stamper 1 is 10 m/sec or more. This is due to the fact that foreign matter, dirt, dust, etc. are not sufficiently removed at wind speeds of 10 m/sec or less.
しかる後、第２図に示すように、固定金型３ａおよび移
動金型３ｂが閉じられ、合成樹脂を射出成形機のノズル
５から射出して光ディスク基板を成形する。Thereafter, as shown in FIG. 2, the fixed mold 3a and the movable mold 3b are closed, and the synthetic resin is injected from the nozzle 5 of the injection molding machine to mold an optical disk substrate.
（発明の効果）
以上のように、本発明は、スタンパ−の上方に設けたク
リーンエア吹出し装置から、スタンパ−表面での流速が
１０ｍ／秒以上でクリーンエアをスタンパ−上面に吹出
させ、ついで合成樹脂を射出成形して光ディスク基板を
製造するから、スタンパ−上面に異物、ゴミ、ホコリが
付着するのを防止し、スタンパ−に形成された情報ピッ
トが正確に転写された光ディスク基板を製造することが
できるので、信号再生時にエラー ドロップアウトが発
生するのを防止することができる等の利点がある。(Effects of the Invention) As described above, the present invention blows clean air onto the top surface of the stamper from a clean air blowing device provided above the stamper at a flow velocity of 10 m/sec or more on the stamper surface, and then Since optical disk substrates are manufactured by injection molding synthetic resin, it is possible to prevent foreign matter, dirt, and dust from adhering to the top surface of the stamper, and to manufacture optical disk substrates in which the information pits formed on the stamper are accurately transferred. This has advantages such as being able to prevent error dropouts from occurring during signal playback.
第１図は金型に装着したスタンパ−上面に、クリーンエ
アー吹出し装置からクリーンエアーを吹出している状態
を示す断面図、第２図はクリーンエアの吹出しを停止し
て、金型を閉じた状態を示す断面図である。
図中、１はスタンパ−２ａは固定グイプレート、２ｂは
移動グイプレート、３ａは固定金型、３ｂは移動金型、
４ａはスタンパ−押え具、４ｂはスタンパ−押えリング
、５はノズル、６はクリーンエア吹出し装置である。Figure 1 is a cross-sectional view showing the state in which clean air is being blown from the clean air blowing device onto the top surface of the stamper attached to the mold, and Figure 2 is the state in which the blowing of clean air has been stopped and the mold is closed. FIG. In the figure, 1 is a stamper, 2a is a fixed Goui plate, 2b is a movable Goui plate, 3a is a fixed mold, 3b is a movable mold,
4a is a stamper holder, 4b is a stamper holder ring, 5 is a nozzle, and 6 is a clean air blowing device.
Claims (1)
樹脂を射出成形し、スタンパーに形成した情報ピットを
転写した光ディスク基板を製造する方法において、スタ
ンパーの上方に設けたクリーンエア吹出し装置から、１
０ｍ／秒以上の流速でクリーンエアをスタンパー上面に
吹出させ、ついで合成樹脂を射出成形することを特徴と
する光ディスク基板の製造方法。In a method of manufacturing an optical disk substrate by mounting a stamper with information pits on a mold, injection molding a synthetic resin, and transferring the information pits formed on the stamper, a clean air blowing device installed above the stamper is used.
A method for manufacturing an optical disk substrate, comprising blowing clean air onto the upper surface of a stamper at a flow rate of 0 m/sec or more, and then injection molding a synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27585388A JPH02122445A (en) | 1988-10-31 | 1988-10-31 | Production of optical disk substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP27585388A JPH02122445A (en) | 1988-10-31 | 1988-10-31 | Production of optical disk substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02122445A true JPH02122445A (en) | 1990-05-10 |
Family
ID=17561347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP27585388A Pending JPH02122445A (en) | 1988-10-31 | 1988-10-31 | Production of optical disk substrate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02122445A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110524759A (en) * | 2019-09-17 | 2019-12-03 | 周立 | A kind of injection mold with trimming function |
-
1988
- 1988-10-31 JP JP27585388A patent/JPH02122445A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110524759A (en) * | 2019-09-17 | 2019-12-03 | 周立 | A kind of injection mold with trimming function |
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