JPS60202556A - Production of optical disk - Google Patents
Production of optical diskInfo
- Publication number
- JPS60202556A JPS60202556A JP5822784A JP5822784A JPS60202556A JP S60202556 A JPS60202556 A JP S60202556A JP 5822784 A JP5822784 A JP 5822784A JP 5822784 A JP5822784 A JP 5822784A JP S60202556 A JPS60202556 A JP S60202556A
- Authority
- JP
- Japan
- Prior art keywords
- information storage
- storage member
- outer diameter
- information
- molding
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は光ディスクの製造方法に係り、特に光ディスク
の最外周部まで再生、あるいは畳込みおよび再生を可能
とする製造法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a method of manufacturing an optical disc, and more particularly to a manufacturing method that enables playback, or folding and playback, to the outermost portion of an optical disc.
従来技術を透明樹脂の射出成形により、第１２図に示す
光ディスク１．１′を構成する情報記憶部材２．２’；
２＃を形成し、光ディスクに組立、製造する例をとっ
て説明する。第３図に情報記憶部材２の樹脂成形製を示
す、成形ｆｊｊｉ６には、情報記憶部材２となるべき樹
力旨に情報信号ピットを転写するだめのスタンパ１０が
成形型６に設けられている。射出成形機（図に示めさず
）によって加熱解融された透明樹脂は成形型６のスゲル
ア、ゲート８．を通ってスタンパ１０が設はうしたキャ
ビティ９に鋳込まれ、スタンパ１０に。Information storage member 2.2' constituting the optical disc 1.1' shown in FIG. 12 by injection molding of transparent resin using conventional technology;
An example of forming 2# and assembling and manufacturing it into an optical disk will be explained. FIG. 3 shows that the information storage member 2 is made of resin molding. In the molded fjji 6, a stamper 10 is provided in the mold 6 to transfer information signal pits to the tree power that is to become the information storage member 2. . The transparent resin heated and melted by an injection molding machine (not shown) is inserted into the mold 6, the gate 8. The stamper 10 is cast into the prepared cavity 9 through the stamper 10.
同心円状に瞑けられた情報信号が転写されて冷却、同化
後、成形型内に設けられたポンチ１１にて情報記憶部材
の中心に穴をあけた後に成形型・６から取出され、第４
図に示す情報記憶部材２が形成される。この場合、成形
型６のキャビティ９の外径は一般に（光ディスクの最終
所望寸法＋成形収縮量＋０．５ｇ＋＠度の仕上代）とし
、成形された情報記憶部材は（最終所望寸法＋０．１ｗ
程度の仕上代）となる。この情報記憶部材に第１図の如
く光反射膜、あるいは記録媒体膜３を形成し、必要があ
れば第２図の如く保Ｓ腺形成４する。このようにして得
られた情報記憶部材２を用途、情報量により単板のまま
か、あるいは２板貼合せ組立によ〕光ディスク１，１．
を−造する。このような従来技術で製造される光ディス
クの情報記憶部材２では、第５図に示すように［ｔＢ材
の最外周１３から一定距離、例えば５〜１０■の箇所に
成形に基づく特異な歪み等１５が生じ、この歪みが信号
ピット転写域１４に“あるため、信号ピットの同心円状
配列、即ちトラックか変形し、光ディスクの畳込みおよ
び再生時にはトラッキング不良を起こすという欠点があ
った。After the information signals arranged in concentric circles are transferred, cooled, and assimilated, a hole is punched in the center of the information storage member using a punch 11 provided in the mold, and then taken out from the mold 6.
The information storage member 2 shown in the figure is formed. In this case, the outer diameter of the cavity 9 of the mold 6 is generally (final desired dimension of the optical disc + amount of molding shrinkage + 0.5 g + finishing allowance of @ degrees), and the molded information storage member is (final desired dimension + 0.1 w
(finishing cost). A light reflecting film or a recording medium film 3 is formed on this information storage member as shown in FIG. 1, and if necessary, an S gland is formed as shown in FIG. 2. The information storage member 2 obtained in this manner may be used as a single plate depending on the purpose and amount of information, or may be assembled by laminating two plates.
Build. In the information storage member 2 of the optical disk manufactured by such conventional technology, as shown in FIG. 15, and since this distortion exists in the signal pit transfer area 14, the concentric arrangement of signal pits, that is, the track, is deformed, resulting in poor tracking during convolution and reproduction of the optical disc.
本発明の目的は、光ディスクの最外周信号トラックまで
、トラッキング不良なく再生あるいけ、資込みおよび再
生が可能となる光ディスクを提供することにある・・
〔発明の概要〕
本発明の要点は次の通りである。トラッキング不良は光
ディスクの外周からほぼ一定距離のところで発生する。An object of the present invention is to provide an optical disc that can be read, loaded, and played without tracking defects up to the outermost signal track of the optical disc. [Summary of the Invention] The main points of the present invention are as follows. That's right. Tracking failure occurs at a substantially constant distance from the outer periphery of the optical disc.
従って、該光ディスクを構成する情報記憶部材を最終所
望の外径より大きくし、トラッキング不良の原因となる
咳情報記憶部材の歪みの発生箇所を情報信号転写域の外
側に移動させることを喪とし、所定工程を経た後、所望
外径に仕上げることにある。Therefore, it is important to make the information storage member constituting the optical disc larger than the final desired outer diameter, and to move the location where the distortion of the cough information storage member that causes tracking failure occurs to the outside of the information signal transfer area. After passing through a predetermined process, it is finished to a desired outer diameter.
以下、本発明の一実施例を第６図によシ睨明する。光デ
ィスクの一例として外径ｚ３００−の光方式ビデオディ
スクにつｉて述べる・先の従来技術に述べたように、透
明樹脂たとへばＰＭＭＡ樹脂の射出成形によって得られ
た情報記憶部材２は外周から内側に約８〜１０．のとこ
ろり成形による特異な歪み１５が生じる。この位置は情
報信号ピット転写域の最外周から３〜５園内側に位置に
相当する。その丸め、この成形による特異な歪み１５に
よシ情報信号ピットの同心円状配列即ちトラックが変形
して、情報再生時のトラッキング不良を起す場合がある
。この成形による特異な金み１５は、上記したように常
に情報記憶部材２の外周から一定の距離に生じることを
実験的に確１している。従って、この歪み１５を情報信
号ピット転写域１４よシ外儒に生じしめるように、成形
によって形成する情報記憶部材２の外径りのみを（Ｄ）
３００ ｍ ＋ ａ５ ｖｍの仕上代＋（６〜１０■
）〕で定められるように従来よシも大きくする。この外
径を大きくするには、第３図に示めした成形型６の外周
リング１ｄの内径ｄを（ｄ ） Ａｒ１０ ｗｍ＋成形
収縮量十〇、Ｓ■の仕上代＋（６〜１０ＩＩＩＩ）〕と
すればよい。An embodiment of the present invention will be explained below with reference to FIG. As an example of an optical disc, an optical video disc with an outer diameter of z300 will be described. As described in the prior art, the information storage member 2 obtained by injection molding of a transparent resin, such as PMMA resin, is formed from the outer periphery to the inside. Approximately 8-10. A unique distortion 15 occurs due to spot forming. This position corresponds to a position within 3 to 5 circles from the outermost circumference of the information signal pit transfer area. Due to the rounding and the peculiar distortion 15 caused by this shaping, the concentric arrangement of the information signal pits, that is, the track, may be deformed, resulting in tracking failure during information reproduction. It has been experimentally confirmed that the unique molding 15 is always formed at a constant distance from the outer periphery of the information storage member 2, as described above. Therefore, in order to cause this distortion 15 outside the information signal pit transfer area 14, only the outer diameter of the information storage member 2 formed by molding is adjusted (D).
300 m + finishing allowance of A5 VM + (6~10■
)]. To increase this outer diameter, the inner diameter d of the outer ring 1d of the mold 6 shown in FIG. And it is sufficient.
ＰＭＭＡ１Ｍ脂によるこの場合、°成形収縮量は約１ｍ
である。このようにして得られた情報記憶部材２は第６
図に示す如く情報信号ピッド転写域１４の外側に成形に
・よる特異な歪み１５が生じ。In this case with PMMA 1M resin, the amount of molding shrinkage is approximately 1 m.
It is. The information storage member 2 thus obtained is the sixth
As shown in the figure, a peculiar distortion 15 occurs outside the information signal pit transfer area 14 due to molding.
情報信号ピットのトラックを変形させることはなくなる
。核情報記憶部材２の信号ピット転写面側１２にＭの反
射膜（夕１０００人）３を蒸着し、信号ピット保−のた
めの保―暎４を形成した後異種の情報を転写された該情
報記憶部材２を信号ピット転写面を内側にしてゴム系ホ
ットメルト等の＊＊剤５で貼合せる。その後、光方式ビ
デオディスクの最終所望外極１２１５００ ｖｍ １７
になるよう外周切削により仕上げる。There is no longer any deformation of the track of the information signal pit. After depositing an M reflective film (1,000 layers) 3 on the signal pit transfer surface side 12 of the nuclear information storage member 2 and forming a protection film 4 for signal pit protection, The information storage member 2 is laminated with a ** agent 5 such as a rubber-based hot melt adhesive with the signal pit transfer surface facing inside. After that, the final desired outer pole of the optical video disc 121500 VM 17
Finish by cutting the outer periphery so that it looks like this.
上記した実施例は外＠ｇｓｏｏ、の光方式ビデオディス
クの例でありたが、外径１２０■のディジタルオーディ
オディスク、８２００■の光方式％式％
ィスクについても、若干の相違はあるものの成形による
特異な歪み１５は外周から数■のところに生じることが
わかりている。従・っ工、基本的には上記した方法にし
て、光ディスクを製造すれば問題はない。The above embodiment was an example of an optical video disc made by @gsoo, but a digital audio disc with an outer diameter of 120 cm and an optical disc with an outer diameter of 8200 cm are also available due to molding, although there are slight differences. It has been found that the unique distortion 15 occurs several inches from the outer periphery. Basically, if you manufacture optical discs using the method described above, there will be no problem.
本発明によれば、情報記憶部材の透明樹脂の射出成形に
よる製造過程において、成形による特異な歪みを情報信
号ピット転写域の外側に発生させるものでないので諌信
号ピットのトラックを変形させることなく、光ディスク
の情報沓込みや再生時においてトラッキング不良を起さ
ない効果がある・According to the present invention, in the manufacturing process of the transparent resin of the information storage member by injection molding, the unique distortion due to molding is not generated outside the information signal pit transfer area, so that the track of the signal pit is not deformed. It has the effect of preventing tracking defects when reading and reproducing information from optical discs.
第１．第２図は光ディスクの概念図、第３図は情報記憶
部材成形型のｗＴＩＩｉ図、第４図は情報記憶部材の断
面図、第５図は従来技術による情報記憶部材の平向図、
第６図は本発明による情報記憶部材の平面図である。
１．１′・・・・・・光ディスク
２・・・・・・情報記憶部材
３・・・・・・反射膜あるいは記録媒体４・・・・・・
保麟膜
５・・・・・・接着剤
６・・・・・・情報記憶部材成形型
９・・・・・・情報記憶部材成形キャビティ１０・・・
・・・スタンパ口
第７ 図
第 ３８２］
第４［１
（α）
第５図
ノ３
１［ｌ ≦ 回
４1st. Fig. 2 is a conceptual diagram of an optical disk, Fig. 3 is a wTII diagram of an information storage member mold, Fig. 4 is a sectional view of the information storage member, and Fig. 5 is a plan view of an information storage member according to the prior art.
FIG. 6 is a plan view of an information storage member according to the present invention. 1.1'... Optical disc 2... Information storage member 3... Reflective film or recording medium 4...
Preservative film 5...Adhesive 6...Information storage member mold 9...Information storage member molding cavity 10...
... Stamper mouth 7 Figure 382] 4th [1 (α) Figure 5 No. 3 1 [l ≦ times 4
Claims (1)
、即ち情報記憶部材を最終所望の外様よりも数−大きく
製作し、該情報記憶部材に光反射膜、あるいは記憶媒体
膜を形成し保護膜形成後、該情報記憶部材を最終所望外
径に仕上けることを特徴とする光デイスク製造方法。t. In the production of optical disks, the optical disk transparent resin substrate, that is, the information storage member, is made several times larger than the final desired appearance, and a light reflective film or storage medium film is formed on the information storage member, and after the protective film is formed. . A method for manufacturing an optical disk, which comprises finishing the information storage member to a final desired outer diameter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5822784A JPS60202556A (en) | 1984-03-28 | 1984-03-28 | Production of optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5822784A JPS60202556A (en) | 1984-03-28 | 1984-03-28 | Production of optical disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60202556A true JPS60202556A (en) | 1985-10-14 |
Family
ID=13078191
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5822784A Pending JPS60202556A (en) | 1984-03-28 | 1984-03-28 | Production of optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60202556A (en) |
-
1984
- 1984-03-28 JP JP5822784A patent/JPS60202556A/en active Pending
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