JPS6323240A - Production of disk-shaped memory medium - Google Patents
Production of disk-shaped memory mediumInfo
- Publication number
- JPS6323240A JPS6323240A JP16634486A JP16634486A JPS6323240A JP S6323240 A JPS6323240 A JP S6323240A JP 16634486 A JP16634486 A JP 16634486A JP 16634486 A JP16634486 A JP 16634486A JP S6323240 A JPS6323240 A JP S6323240A
- Authority
- JP
- Japan
- Prior art keywords
- storage medium
- center hub
- memory medium
- center
- dies
- 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
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000000463 material Substances 0.000 claims abstract description 8
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 239000011347 resin Substances 0.000 claims abstract description 6
- 229920005989 resin Polymers 0.000 claims abstract description 6
- 238000003860 storage Methods 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 17
- 239000007769 metal material Substances 0.000 claims description 2
- 239000000758 substrate Substances 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract 1
- 238000012856 packing Methods 0.000 abstract 1
- 230000003287 optical effect Effects 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 2
- 239000004926 polymethyl methacrylate Substances 0.000 description 2
- 229910000861 Mg alloy Inorganic materials 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 229920000515 polycarbonate Polymers 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
-
- 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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/70—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by moulding
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
- B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2017/00—Carriers for sound or information
- B29L2017/001—Carriers of records containing fine grooves or impressions, e.g. disc records for needle playback, cylinder records
- B29L2017/003—Records or discs
- B29L2017/005—CD''s, DVD''s
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Optical Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は円盤状記憶媒体の製造方法に関し、特に、レー
ザ光を用いて記憶媒体に情報を記録し、または記録した
情報の再生・消去等を行う光メモリ素子の製造に利用さ
れる。Detailed Description of the Invention (Industrial Application Field) The present invention relates to a method for manufacturing a disk-shaped storage medium, and in particular, to a method for recording information on a storage medium using a laser beam, or for reproducing/erasing recorded information. It is used to manufacture optical memory devices that perform
（従来の技術）
近年、レーザ光を用いて円盤状の記憶媒体に情報を記録
し、または記録された情報の再生もしくは消去を行う光
メモリ素子の開発が行われている。(Prior Art) In recent years, optical memory elements have been developed that use laser light to record information on a disk-shaped storage medium, or to reproduce or erase recorded information.
このような光メモリ素子は、第２図に示すように一１円
盤状に形成された記憶媒体ａと、この記憶媒体ａの中央
部に、記憶媒体ａ上の記録トラックと同心を保って接着
剤により接着固定されたセンターハブｂとで構成されて
いる。As shown in FIG. 2, such an optical memory element consists of a storage medium a formed in the shape of an eleven disk, and an adhesive placed in the center of the storage medium a so as to be concentric with the recording track on the storage medium a. The center hub b is fixed with adhesive.
記憶媒体ａは、一般にガラス、ポリカーボネート、ある
いはポリメタクリル酸メチル（ＰＭＭＡ）等の材料で形
成されており、これらはいずれも割れ易かったり、傷付
き易かったりする。このため、記憶媒体ａの破損等を防
止し、保護する意味で、後述する駆動モータＣの回転軸
と嵌合する部分に、前記したような別体のセンターハブ
ｂを接着によって設けているのである。The storage medium a is generally made of a material such as glass, polycarbonate, or polymethyl methacrylate (PMMA), and all of these materials are easily broken or scratched. Therefore, in order to prevent and protect the storage medium a from damage, etc., a separate center hub b as described above is provided by adhesive on the part that fits with the rotating shaft of the drive motor C, which will be described later. be.
このように構成された光メモリ素子は、第３図に示すよ
うに、センターハブｂを駆動モータＣの回転軸に嵌め合
わせて回転させ、記憶媒体ａの近傍に該記憶媒体ａの半
径方向に移動可能に配設されたピックアップｅによって
、記憶媒体ａ上に情報の記録を行い、あるいは記録され
た情報の再生・消去を行うものである。As shown in FIG. 3, the optical memory element configured in this manner is moved in the vicinity of the storage medium a in the radial direction of the storage medium a by fitting the center hub b to the rotation shaft of the drive motor C and rotating it. Information is recorded on the storage medium a, or the recorded information is reproduced or erased using a pickup e that is arranged so as to be capable of recording information on the storage medium a.
ところで、ピックアップｅによって記憶媒体ａ上に情報
を記録する場合、記憶媒体ａ上には１〜２μｍのトラッ
クピッチでらせん状もしくは同心円状に情報が記録され
る。ところが、前記したように、記憶媒体ａは駆動モー
タＣによって回転しているため、この駆動モータＣの軸
プレや、センターハブｂと回転軸との嵌め合わせ精度等
により、記憶媒体ａは通常、±０．１ｍｍ程度の芯プレ
を生じながら回転している。したがって、このままでは
、ピックアップｅが記録トラックを正確にトレースする
ことができない。そこで、通常は記憶媒体ａの表面にら
せん状もしくは同心円状に凹凸の溝を設け、この溝を光
学的手段によって検出しフィードバックをかけて記録ト
ランクをトレースする、いわゆるラジアルサーボ方式が
採用されている。By the way, when information is recorded on the storage medium a by the pickup e, the information is recorded on the storage medium a in a spiral or concentric pattern with a track pitch of 1 to 2 μm. However, as described above, since the storage medium a is rotated by the drive motor C, the storage medium a is usually It rotates with a core pre-force of about ±0.1 mm. Therefore, as it is, the pickup e cannot accurately trace the recording track. Therefore, a so-called radial servo method is usually adopted, in which a spiral or concentric groove is formed on the surface of the storage medium a, and this groove is detected by optical means and feedback is applied to trace the recording trunk. .
しかしながら、このようなサーボ方式を採用しても、サ
ーボゲインを無限大にすることはできないので、記録ト
ラックの芯プレを極力小さくするために、センタ−ハブ
ｂの穴径精度および記憶媒体ａとの同心度を極めて高く
する必要がある。また、センターハブｂのハブ面と記憶
媒体ａの記録面との平行度が悪いと、記憶媒体ａの面ブ
レが生じ、ピンクアップｅで情報の記録・再生を行うと
きに、この面ブレがピックアップｅのフォーカスずれの
原因になる。However, even if such a servo system is adopted, the servo gain cannot be made infinite, so in order to minimize the core pres- sure of the recording track, the hole diameter accuracy of the center hub b and the storage medium a must be adjusted. It is necessary to have extremely high concentricity. In addition, if the parallelism between the hub surface of center hub b and the recording surface of storage medium a is poor, surface wobbling of storage medium a will occur, and this surface wobbling will occur when recording and reproducing information with pink-up e. This causes the pickup e to be out of focus.
（発明が解決しようとする問題点）
このように、記憶媒体ａに取付けられるセンターハブｂ
は、記録トラックとの同心度および穴径精度はもとより
、記憶媒体ａの記録面との平行度も極めて精密なものに
する必要があり、このため、記憶媒体ａへのセンターハ
ブｂの接着作業に手間がかかり、生産性が悪いという問
題があった。(Problem to be solved by the invention) In this way, the center hub b attached to the storage medium a
In addition to the concentricity with the recording track and the accuracy of the hole diameter, the parallelism with the recording surface of the storage medium a must also be extremely precise. The problem was that it was time-consuming and had poor productivity.
（問題点を解決するための手段）
本発明に係る円盤状記憶媒体の製造方法は、中心部に位
置決め用のセンターハブを有する円盤状の記憶媒体の製
造方法であつて、前記記憶媒体の中心部に開設された開
口穴に、該開口穴の周縁部を両面から挟持する形状の前
記センターハブを金型による一体成形により設けたもの
である。(Means for Solving the Problems) A method for manufacturing a disk-shaped storage medium according to the present invention is a method for manufacturing a disk-shaped storage medium having a center hub for positioning at the center, the method comprising: The center hub, which is shaped to sandwich the peripheral edge of the opening hole from both sides, is provided in the opening hole formed in the opening hole by integral molding with a metal mold.
（作用）
金型による一体成型によってセンターハブを作製するこ
とにより、高精度を要求されるセンターハブを個々に作
製する必要がなくなり、また、最初に精度の高い金型を
作製すれば、それによって高精度のセンターハブの量産
が行える。(Function) By manufacturing the center hub by integral molding with a mold, there is no need to manufacture each center hub individually, which requires high precision. Mass production of high-precision center hubs is possible.
（実施例） 以下、本発明の一実施例を図面を参照して説明する。(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
第１図（ａ）、 （ｂｌは本発明に係る円盤状記憶媒体
の製造方法の各工程図を示し、第１図（Ｃ１はこの製造
方法によって作製された円盤状記憶媒体（例えば光メモ
リ素子）を示している。FIG. 1(a), (bl shows each process diagram of the method for manufacturing a disc-shaped storage medium according to the present invention, and FIG. 1 (C1 shows a disc-shaped storage medium (for example, an optical memory element) manufactured by this manufacturing method It shows.
第１図（Ｃ）において、円盤状記憶媒体（以下単に記憶
媒体という）１は、２枚の透明基板２．３を接合したも
ので、これら透明基板は２．３の接合面には、図示は省
略しているが、記憶層（記録面）がそれぞれ形成されて
いる。このように、透明基板２，３を２枚重ねとするこ
とにより、記憶媒体１枚当たりの情報量が２倍になると
いう利点がある。In FIG. 1(C), a disk-shaped storage medium (hereinafter simply referred to as a storage medium) 1 is made by bonding two transparent substrates 2.3, and the bonding surface of these transparent substrates 2.3 is Although not shown, a storage layer (recording surface) is formed in each case. In this way, by stacking two transparent substrates 2 and 3, there is an advantage that the amount of information per storage medium is doubled.
この記憶媒体１の中心部には開口穴４が開設されており
、この開口穴４に位置決め用のセンターハブ５が設けら
れている。センターハブ５は、短円筒状に形成されてお
り、その周側面に形成された環状の凹陥溝６によって前
記開口穴４の周縁部７を上下両面から挟持するように構
成されている。An aperture 4 is formed in the center of the storage medium 1, and a center hub 5 for positioning is provided in the aperture 4. The center hub 5 is formed into a short cylindrical shape, and is configured to sandwich the peripheral edge 7 of the opening hole 4 from both upper and lower surfaces by an annular recessed groove 6 formed on its peripheral side.
また、センターハブ５の上下両端面８，９の中心には、
前記記憶媒体１に設けられたらせん状もしくは同心円状
の記録トランク（図示省略）と同心を保つように嵌合凹
部１０．１１が形成されている。この嵌合凹部１０，１
１が、駆動モータの回転軸（図示省略）と嵌合する部分
である。In addition, at the center of both the upper and lower end surfaces 8 and 9 of the center hub 5,
A fitting recess 10.11 is formed so as to be concentric with a spiral or concentric recording trunk (not shown) provided in the storage medium 1. This fitting recess 10,1
Reference numeral 1 denotes a portion that fits with the rotating shaft (not shown) of the drive motor.
次に、上記した構造の記憶媒体１の製造方法を説明する
。Next, a method for manufacturing the storage medium 1 having the above structure will be explained.
まず、透明基板２，３の中心部に開設された開口穴４と
該開口穴４の周縁部７とを内包するように、上下両側か
ら上金型１５および下金型１６を装着し、これら各金型
１５．１６と記憶媒体１上の記録トラックとの同心度を
合わせる〔第１図（ａ）〕。上金型１５の内部天壁には
、その中央部にセンターハブ５の前記嵌合凹部１０を形
成するための突起部１７が設けられ、下金型１６の内部
底壁にも同様に突起部１８が設けられている。この状態
で、ノズル２０を介して上金型１５に設けられた充填孔
１９から金型内に樹脂材料を充填する〔第１図（ｂｌ）
。この後、樹脂材料を硬化させ、上金型１５および下金
型１６を上下方向に開いて取り外すと、第１図＋ｃ＋に
示すように、透明基板２．３にセンターハブ５が一体成
型で固着された構造の記憶媒体１を形成することができ
る。First, the upper mold 15 and the lower mold 16 are attached from both upper and lower sides so as to enclose the opening hole 4 made in the center of the transparent substrates 2 and 3 and the peripheral edge 7 of the opening hole 4. The concentricity of each mold 15, 16 and the recording track on the storage medium 1 is adjusted [FIG. 1(a)]. The inner top wall of the upper mold 15 is provided with a protrusion 17 at its center for forming the fitting recess 10 of the center hub 5, and the inner bottom wall of the lower mold 16 is also provided with a protrusion. 18 are provided. In this state, the resin material is filled into the mold through the filling hole 19 provided in the upper mold 15 via the nozzle 20 [Fig. 1 (bl)]
. After that, when the resin material is cured and the upper mold 15 and lower mold 16 are opened and removed in the vertical direction, the center hub 5 is integrally molded and fixed to the transparent substrate 2.3, as shown in FIG. 1+c+. It is possible to form a storage medium 1 having a similar structure.
なお、上記実施例では、金型内に樹脂材料を充填してセ
ンターハブ５を形成しているが、例えばアルミニウムー
マグネシウム合金等の金属材料を金型内に充填してセン
ターハブ５を形成してもよい。また、上金型１５および
下金型１６の内面形状は、第１図（ａｌに示した形状に
限定されるものではなく、内面形状を適宜変更すること
により、種々の形状のセンターハブを作製することがで
きる。In the above embodiment, the center hub 5 is formed by filling the mold with a resin material, but the center hub 5 may also be formed by filling the mold with a metal material such as an aluminum-magnesium alloy. You can. Furthermore, the inner shapes of the upper mold 15 and the lower mold 16 are not limited to the shapes shown in FIG. can do.
（発明の効果）
以上説明したように、本発明に係る円盤状記憶媒体の製
造方法によれば、金型による一体成型によって透明基板
にセンターハブを設けることができるので、従来の製造
方法のような接着の手間を省くことができ、しかも生産
性を著しく向上させることができる。(Effects of the Invention) As explained above, according to the method for manufacturing a disk-shaped storage medium according to the present invention, the center hub can be provided on the transparent substrate by integral molding with a mold, so that It is possible to eliminate the trouble of adhesive bonding and to significantly improve productivity.
第１図（ａｌ、 （ｂ）は本発明に係る円盤状記憶媒体
の製造方法の各工程を示す縦断面図、第１図（Ｃ）は第
１図（ａ）、 （ｂ）に示す製造工程によって作製され
た円盤状記憶媒体の縦断面図、第２図は従来の円盤状記
憶媒体の斜視図、第３図は円盤状記憶媒体の記録・再生
システムの概略構成図である。
１・・・円盤状記憶媒体 ５・・・センターハブ１５
・・・上金型 １６・・・下金型１に７図
（ａ）
（ｂ）
＜Ｃ）1(a) and 1(b) are longitudinal sectional views showing each step of the method for manufacturing a disc-shaped storage medium according to the present invention, and FIG. 1(C) is a manufacturing method shown in FIGS. 1(a) and 1(b). FIG. 2 is a vertical cross-sectional view of a disc-shaped storage medium manufactured by the process, FIG. 2 is a perspective view of a conventional disc-shaped storage medium, and FIG. 3 is a schematic configuration diagram of a recording/reproducing system for a disc-shaped storage medium. 1. ... Disk-shaped storage medium 5 ... Center hub 15
...Upper mold 16...7 in lower mold 1 (a) (b) <C)
Claims (1)
記憶媒体の製造方法であって、 前記記憶媒体の中心部に開設された開口穴に、該開口穴
の周縁部を両面から挟持する形状の前記センターハブを
金型による一体成形により設けたことを特徴とする円盤
状記憶媒体の製造方法。 ２）センターハブが樹脂材料で形成されたものである特
許請求の範囲第１項記載の円盤状記憶媒体の製造方法。 ３）センターハブが金属材料で形成されたものである特
許請求の範囲第１項記載の円盤状記憶媒体の製造方法。[Claims] 1) A method for manufacturing a disc-shaped storage medium having a center hub for positioning at the center, the method comprising: inserting a peripheral edge of the opening hole into an opening hole formed at the center of the storage medium; A method for manufacturing a disc-shaped storage medium, characterized in that the center hub, which is shaped to be sandwiched from both sides, is provided by integral molding using a mold. 2) The method for manufacturing a disc-shaped storage medium according to claim 1, wherein the center hub is made of a resin material. 3) The method for manufacturing a disc-shaped storage medium according to claim 1, wherein the center hub is formed of a metal material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16634486A JPS6323240A (en) | 1986-07-15 | 1986-07-15 | Production of disk-shaped memory medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16634486A JPS6323240A (en) | 1986-07-15 | 1986-07-15 | Production of disk-shaped memory medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6323240A true JPS6323240A (en) | 1988-01-30 |
Family
ID=15829633
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16634486A Pending JPS6323240A (en) | 1986-07-15 | 1986-07-15 | Production of disk-shaped memory medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6323240A (en) |
-
1986
- 1986-07-15 JP JP16634486A patent/JPS6323240A/en active Pending
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