JP2789837B2 - optical disk - Google Patents
optical diskInfo
- Publication number
- JP2789837B2 JP2789837B2 JP3082349A JP8234991A JP2789837B2 JP 2789837 B2 JP2789837 B2 JP 2789837B2 JP 3082349 A JP3082349 A JP 3082349A JP 8234991 A JP8234991 A JP 8234991A JP 2789837 B2 JP2789837 B2 JP 2789837B2
- Authority
- JP
- Japan
- Prior art keywords
- optical disk
- substrate
- antistatic film
- hub
- label
- 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.)
- Expired - Fee Related
Links
Description
【０００１】[0001]
【産業上の利用分野】本発明は、基板上に帯電防止膜を
備える光ディスクに関する。近年、大容量の文書データ
や画像情報を記憶させる情報記憶媒体として光ディスク
が脚光を浴びている。光ディスクは１μｍ程度に絞られ
た光ビームによって記憶されるため、大容量の情報が記
憶できる。しかし、光ディスクの基板材料はポリカーボ
ネート，アクリル，ガラス等の絶縁性部材が利用される
ため、光ディスクの表面は帯電性を有している。従って
多量の塵埃が付着すると、情報の記録・再生が不可能と
なる。このために基板上には表面抵抗の小さい帯電防止
膜を形成することが要望されている。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk having an antistatic film on a substrate. In recent years, optical disks have been spotlighted as information storage media for storing large volumes of document data and image information. Since the optical disk is stored by a light beam focused to about 1 μm, a large amount of information can be stored. However, since an insulating member such as polycarbonate, acrylic, or glass is used as the substrate material of the optical disk, the surface of the optical disk has a charging property. Therefore, if a large amount of dust adheres, recording / reproduction of information becomes impossible. Therefore, it is desired to form an antistatic film having a small surface resistance on a substrate.
【０００２】[0002]
【従来の技術】図３は従来の光ディスクの形状図であっ
て図３（ａ）は要部平面図を示し、図３（ｂ）は要部断
面図を示す。この光ディスクは貼り合わせによって両面
使用を可能にした光ディスクの一例を示したものであ
る。両図において、１は透明かつ絶縁性部材からなる円
板状の基板、２は基板１の片面にそれぞれ成膜された記
録膜、３は基板１の表面にそれぞれ形成された帯電防止
膜、４は貼り合わせ用の接着剤、５は円板状の基板１の
中心孔、６は図示しないドライブ用のスピンドルハブと
中心を一致させて嵌合する着脱自在のハブであって、基
板１の中心孔５に固着されている。ここでハブ６を含む
光ディスクを総称して光ディスク７と呼称することにす
る。2. Description of the Related Art FIG. 3 is a diagram showing the shape of a conventional optical disk. FIG. 3A is a plan view of a main part, and FIG. 3B is a sectional view of a main part. This optical disk is an example of an optical disk that can be used on both sides by bonding. In both figures, 1 is a disc-shaped substrate made of a transparent and insulating member, 2 is a recording film formed on one surface of the substrate 1, 3 is an antistatic film formed on the surface of the substrate 1, 4 Is an adhesive for bonding, 5 is a center hole of the disk-shaped substrate 1, 6 is a detachable hub that fits with a drive spindle hub (not shown) so that the center is aligned with the center, and the center of the substrate 1 is It is fixed in the hole 5. Here, the optical disks including the hub 6 are collectively referred to as an optical disk 7.
【０００３】基板１の表面は一般に傷が付き易い所謂擦
傷性の部材で構成されている。基板１は射出成形等の手
段によって信号記録のためのグルーブ（案内溝）やアド
レス情報及びディスクの特性を示すためのピットが形成
されるが、その際に保持器具によって中心孔５の外周付
近にリング状の微小突起が発生する。８はこの微小突起
を示している。[0003] The surface of the substrate 1 is generally formed of a so-called abrasion member that is easily scratched. In the substrate 1, grooves (guide grooves) for signal recording and pits for indicating address information and the characteristics of the disk are formed by means such as injection molding. Ring-shaped minute projections are generated. Reference numeral 8 denotes the minute projection.
【０００４】ところで、基板１の表面に帯電防止膜を形
成する手段として一般にスピンコート法が用いられる。
しかしながら、上述のようにリング状の微小突起８が存
在する領域は、スピンコート法ではムラが発生してきれ
いな膜を得ることができないために、微小突起８が多数
存在する領域を避けて実施している。Incidentally, as a means for forming an antistatic film on the surface of the substrate 1, a spin coating method is generally used.
However, as described above, in the region where the ring-shaped microprojections 8 are present, unevenness occurs by the spin coating method, so that a clean film cannot be obtained. ing.
【０００５】[0005]
【発明が解決しようとする課題】従って、従来の光ディ
スク７はリング状の微小突起８が存在する領域、即ち、
ハブ６の外周から帯電防止膜の内径までの領域は基板１
が露出しており、この露出部分は絶縁性部材であるため
帯電性を有する。従って、この露出部分に多量の塵埃が
付着し、情報の記録・再生が不可能になる場合が発生す
るといった問題があった。Therefore, the conventional optical disk 7 has a region where the ring-shaped minute projections 8 exist, that is,
The area from the outer periphery of the hub 6 to the inner diameter of the antistatic film is the substrate 1
Are exposed, and since the exposed portion is an insulating member, it has a charging property. Therefore, there has been a problem that a large amount of dust adheres to the exposed portion, making it impossible to record and reproduce information.
【０００６】本発明は上記従来の欠点に鑑みなされたも
ので、表面抵抗の大きな基板露出部分をなくするための
手段を提供することを目的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional drawbacks, and has as its object to provide means for eliminating an exposed portion of a substrate having a large surface resistance.
【０００７】[0007]
【課題を解決するための手段】上記目的を達成するため
に本発明は図１に示すように、表面抵抗の大なる円板状
の基板１の中心にハブ６を固着し、該ハブ６の外周と同
心円状にドーナツ形の帯電防止膜３を備えた光ディスク
７において、前記ハブ６の外周と前記帯電防止膜３の内
周の間に露出する前記基板１の表面領域に、前記帯電防
止膜３と同等以下の表面抵抗を有するラベル９を貼設し
て構成する。According to the present invention, as shown in FIG. 1, a hub 6 is fixed to the center of a disk-shaped substrate 1 having a large surface resistance. In the optical disk 7 having the donut-shaped antistatic film 3 concentric with the outer periphery, the antistatic film is provided on the surface area of the substrate 1 exposed between the outer periphery of the hub 6 and the inner periphery of the antistatic film 3. A label 9 having a surface resistance equal to or less than 3 is attached.
【０００８】[0008]
【作用】ハブ６の外周と帯電防止膜３の内周の間に露出
する基板１の表面領域を、帯電防止膜３と同等以下の表
面抵抗を有するラベル９にて被覆することにより基板１
の表面全体を帯電防止効果のある表面抵抗値に保持し、
塵埃の付着を全面的に防止することができるから、情報
の記録・再生が確実に行えるようになる効果がある。The surface area of the substrate exposed between the outer periphery of the hub and the inner periphery of the antistatic film is covered with a label having a surface resistance equal to or less than that of the antistatic film.
The entire surface of the is maintained at a surface resistance value with an antistatic effect,
Since dust can be completely prevented from adhering, there is an effect that information can be reliably recorded and reproduced.
【０００９】[0009]
【実施例】以下本発明の実施例を図面によって詳述す
る。なお、構成，動作の説明を理解し易くするために全
図を通じて同一部分には同一符号を付してその重複説明
を省略する。BRIEF DESCRIPTION OF THE DRAWINGS FIG. In order to make the description of the configuration and operation easy to understand, the same parts are denoted by the same reference numerals throughout the drawings, and the duplicate description thereof will be omitted.
【００１０】図１は本発明の一実施例を示す形状図であ
って、図１（ａ）は要部平面図、図１（ｂ）は要部断面
図を示す。両図において、９は帯電防止膜３と同等以下
の表面抵抗を有するラベルであって、ハブ６の外周と帯
電防止膜３の内周の間に露出する基板１の表面領域を貼
設により被覆している。その形状は前記表面領域を被覆
するためにドーナツ形状に切り抜かれたものであるが、
図示するようにその外周部分は若干量だけ帯電防止膜３
の内周部分に重なり合うことが好ましい。FIG. 1 is a schematic view showing an embodiment of the present invention. FIG. 1A is a plan view of a main part, and FIG. 1B is a sectional view of a main part. In both figures, reference numeral 9 denotes a label having a surface resistance equal to or less than that of the antistatic film 3, and covers the surface area of the substrate 1 exposed between the outer periphery of the hub 6 and the inner periphery of the antistatic film 3 by sticking. doing. Its shape is cut out into a donut shape to cover the surface area,
As shown in FIG.
It is preferable to overlap with the inner peripheral portion of the.
【００１１】また、このラベル９の貼設は基板１に帯電
防止膜３を形成後にハブ６を取り付け、しかる後に貼設
することが好ましい。これは基板１に対するハブ６の傾
きを防止するためである。It is preferable that the label 9 is attached after the antistatic film 3 is formed on the substrate 1 and then the hub 6 is attached. This is to prevent the inclination of the hub 6 with respect to the substrate 1.
【００１２】また、帯電防止膜３は耐擦傷性を有する部
材、例えば広栄化学社製で光硬化型樹脂からなる商品名
（コーエイハードＤＡＳ−１０２）等が好ましいことは
言うまでもない。It is needless to say that the antistatic film 3 is preferably made of a member having abrasion resistance, for example, a product name (Koei Hard DAS-102) made of photo-curable resin manufactured by Koei Chemical Co., Ltd.
【００１３】効果を確認するために次に述べるような試
作光ディスクを作製した。即ち、ポリカーボネート基板
のヘッド案内溝（図示せず）面に記録膜２としてTbFeCo
からなる光磁気記録膜をスパッタにより成膜した後、こ
れと同じものを記録膜２を対向させて接着剤４で貼り合
わせた。次にこの光ディスクの表面に表面抵抗が1011Ω
の帯電防止膜３（紫外線硬化タイプの前記コーエイハー
ドＤＡＳー１０２）をスピンコート法によって従来どお
り微小突起８より外側に形成した。To confirm the effect, a prototype optical disk as described below was manufactured. That is, TbFeCo is used as the recording film 2 on the surface of the head guide groove (not shown) of the polycarbonate substrate.
After the magneto-optical recording film made of was formed by sputtering, the same film was adhered with an adhesive 4 with the recording film 2 opposed. Next, the surface resistance of this optical disc is 10 11 Ω.
The antistatic film 3 (the above-described UV-curable CoA-Hard DAS-102) was formed on the outer side of the fine projections 8 by a spin coating method as before.
【００１４】帯電防止膜３を形成した後、ハブ６の外周
と前記帯電防止膜３の内周の間に露出する前記基板１の
表面領域に、前記帯電防止膜３と同等以下の表面抵抗を
有するラベル９としてドーナツ状に切り抜いたアルミ箔
を貼設した。アルミ箔の表面抵抗は1011Ωに比較して遙
かに小さな値であった。After forming the antistatic film 3, a surface resistance equal to or less than that of the antistatic film 3 is applied to the surface area of the substrate 1 exposed between the outer periphery of the hub 6 and the inner periphery of the antistatic film 3. A donut-shaped aluminum foil cut out was affixed as a label 9 to be provided. The surface resistance of the aluminum foil was much smaller than 10 11 Ω.
【００１５】上記の本発明の試作光ディスク（ラベルあ
り）と、従来の光ディスク（ラベルなし）について塵埃
の付着度を実験的に調査するために、砂塵を浮遊させた
環境下にそれぞれの光ディスクを30分間放置した後、反
射率の変化で調べた。In order to experimentally investigate the degree of dust adhesion between the above-described prototype optical disk of the present invention (with a label) and the conventional optical disk (without a label), each of the optical disks was placed in an environment where sand and dust floated. After standing for minutes, the change in reflectance was examined.
【００１６】図２は光ディスクの反射率変化を示す特性
図であって、横軸には光ディスクの記録領域の半径を
（inner center outer）の位置変化で示し、縦軸には光
ディスクの反射率の変化量を減少方向に％で示し、特性
曲線Ａは本発明の試作光ディスク（ラベルあり）、特性
曲線Ｂは従来の光ディスク（ラベルなし）を示したもの
である。比較して分かるように本発明の試作光ディスク
の反射率変化は半径方向に殆ど変化しないが、従来の光
ディスクは半径がinner に近づくほど反射率が低下して
いる。これは光ディスク面に付着した塵埃の影響による
ものであることは明らかである。FIG. 2 is a characteristic diagram showing a change in the reflectivity of the optical disk. The horizontal axis indicates the radius of the recording area of the optical disk by a change in position (inner center outer), and the vertical axis indicates the reflectivity of the optical disk. The amount of change is shown in% in the decreasing direction, the characteristic curve A shows the prototype optical disk of the present invention (with label), and the characteristic curve B shows the conventional optical disk (without label). As can be seen from the comparison, the reflectance change of the prototype optical disk of the present invention hardly changes in the radial direction, but the reflectance of the conventional optical disk decreases as the radius approaches the inner side. This is apparently due to the effect of dust attached to the optical disk surface.
【００１７】[0017]
【発明の効果】本発明によれば、光ディスク内周部に多
量の塵埃が付着することはなくなり、情報の記録や再生
が確実に行える効果がある。According to the present invention, a large amount of dust does not adhere to the inner peripheral portion of the optical disk, and there is an effect that information can be recorded and reproduced reliably.
【図１】 本発明の一実施例を示す光ディスクの形状図
である。FIG. 1 is a diagram showing the shape of an optical disc according to an embodiment of the present invention.
【図２】 光ディスクの反射率変化を示す特性図であ
る。FIG. 2 is a characteristic diagram showing a change in reflectance of an optical disk.
【図３】 従来の光ディスクの形状図である。FIG. 3 is a shape diagram of a conventional optical disk.
１ 基板 ３ 帯電防止膜 ６ ハブ ９ ラベル DESCRIPTION OF SYMBOLS 1 Substrate 3 Antistatic film 6 Hub 9 Label
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 平３−273537（ＪＰ，Ａ) 特開 昭60−239946（ＪＰ，Ａ) 特開 昭63−69044（ＪＰ，Ａ) 実開 平３−37615（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) G11B 7/24 535 G11B 7/24 571 G11B 7/24 531 G11B 11/10 521 G11B 11/10 536 G11B 23/00 601 G11B 23/40──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-3-273537 (JP, A) JP-A-60-239946 (JP, A) JP-A-63-69044 (JP, A) 37615 (JP, U) (58) Fields investigated (Int. Cl. 6 , DB name) G11B 7/24 535 G11B 7/24 571 G11B 7/24 531 G11B 11/10 521 G11B 11/10 536 G11B 23 / 00 601 G11B 23/40
Claims (1)
中心にハブ（６）を固着し、該ハブ（６）の外周と同心
円状にドーナツ形の帯電防止膜（３）を備えた光ディス
ク（７）において、前記ハブ（６）の外周と前記帯電防
止膜（３）の内周の間に露出する前記基板（１）の表面
領域に、前記帯電防止膜（３）と同等以下の表面抵抗を
有するラベル（９）を貼設したことを特徴とする光ディ
スク。1. A hub (6) is fixed to the center of a disk-shaped substrate (1) having a large surface resistance, and a donut-shaped antistatic film (3) is formed concentrically with the outer periphery of the hub (6). In the optical disk (7) provided, a surface area of the substrate (1) exposed between the outer periphery of the hub (6) and the inner periphery of the antistatic film (3) has the same thickness as the antistatic film (3). An optical disk having a label (9) having the following surface resistance attached thereto.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3082349A JP2789837B2 (en) | 1991-04-15 | 1991-04-15 | optical disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3082349A JP2789837B2 (en) | 1991-04-15 | 1991-04-15 | optical disk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04315833A JPH04315833A (en) | 1992-11-06 |
| JP2789837B2 true JP2789837B2 (en) | 1998-08-27 |
Family
ID=13772092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3082349A Expired - Fee Related JP2789837B2 (en) | 1991-04-15 | 1991-04-15 | optical disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2789837B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69724740T2 (en) * | 1996-06-03 | 2004-07-08 | Kao Corp. | OPTICAL PLATE, METHOD FOR PRODUCING THE OPTICAL PLATE AND PRODUCTION DEVICE THEREFOR |
-
1991
- 1991-04-15 JP JP3082349A patent/JP2789837B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04315833A (en) | 1992-11-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4068655B2 (en) | Optical information recording medium | |
| JP2702905B2 (en) | optical disk | |
| JPH08203126A (en) | Optical information recording medium, optical information reproducing method, and optical information recording, reproducing and erasing method | |
| JPH10208297A (en) | Optical disk substrate | |
| JP3248309B2 (en) | optical disk | |
| JP2789837B2 (en) | optical disk | |
| JP3104092B2 (en) | Optical disc manufacturing method | |
| JP4284888B2 (en) | Optical information recording medium | |
| JP3230701B2 (en) | recoding media | |
| JPH1166618A (en) | Optical recording medium and its production | |
| JP4115995B2 (en) | Apparatus for optical disc and portable device | |
| JP3144005B2 (en) | Optical disk and disk drive device | |
| JPH0119243Y2 (en) | ||
| US5258976A (en) | Method of assembling reproduction-only discs for a reproduction/recording apparatus | |
| JP2959345B2 (en) | optical disk | |
| JPH03230381A (en) | Substrate for optical information recording medium | |
| JPS63833A (en) | Optical signal recording disk | |
| JPH05128776A (en) | Optical disk | |
| JP2006065955A (en) | Optical disk | |
| JPH10222873A (en) | Optical disk | |
| JP2001195786A (en) | Optical disk | |
| JPH0917027A (en) | Optical information recording medium | |
| JPS63183637A (en) | Optical disk | |
| JPH05128775A (en) | Optical disk | |
| JPS6356833A (en) | Magneto-optical disk |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 19980512 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080612 Year of fee payment: 10 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313113 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080612 Year of fee payment: 10 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080612 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090612 Year of fee payment: 11 |
|
| LAPS | Cancellation because of no payment of annual fees |