JPS5977645A - Discoid substrate - Google Patents
Discoid substrateInfo
- Publication number
- JPS5977645A JPS5977645A JP57186144A JP18614482A JPS5977645A JP S5977645 A JPS5977645 A JP S5977645A JP 57186144 A JP57186144 A JP 57186144A JP 18614482 A JP18614482 A JP 18614482A JP S5977645 A JPS5977645 A JP S5977645A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- roughened
- discoid
- silver
- hole
- 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)
- Application Of Or Painting With Fluid Materials (AREA)
- Optical Record Carriers And Manufacture Thereof (AREA)
Abstract
Description
【発明の詳細な説明】
技術分野
本発明はスピンコーティングにより情報記録層を形成す
る情報記録媒体に適したディスク状基板に関する。DETAILED DESCRIPTION OF THE INVENTION Technical Field The present invention relates to a disk-shaped substrate suitable for an information recording medium on which an information recording layer is formed by spin coating.
従来技術
中心に穴のあいた基板にスピンコーティングにより塗布
を行なう場合第１図に示したように、穴の周辺にドーナ
ツ状に塗布液を供給してから基板を回転させる方法が知
られている。しかしながら、塗布液をドーナツ状に一様
に供給するためには供給装置に高精度が要求される。When coating a substrate with a hole by spin coating, a method is known in which, as shown in FIG. 1, the coating liquid is supplied around the hole in a donut shape and then the substrate is rotated. However, in order to uniformly supply the coating liquid in a donut shape, high precision is required of the supply device.
目 的
本発明は上記問題に鑑みてなされたもので、塗布液を容
易にかつ均一にドーナツ状に供給できるようにし、かつ
均一な塗布膜を得られるようにすることを目的とする。Purpose The present invention was made in view of the above-mentioned problems, and it is an object of the present invention to make it possible to easily and uniformly supply a coating liquid in a donut shape, and to obtain a uniform coating film.
概要
上記目的を達成するために、本発明は中心穴の周辺に粗
面化されたドーナツ状部分を有するディスク状基体を提
供することである。SUMMARY To achieve the above objects, the present invention provides a disk-shaped substrate having a roughened donut-shaped portion around a central hole.
本発明は、平滑な面と粗面化された面とで液体の濡れの
度合が異なることを利用したものである。第２図に示し
たように基板１の中心穴２の周辺にあらかじめ粗面化さ
れたドーナツ状部分４を形成しておく。このような基板
１をスピンコーターにセットし低速で回転させなから粗
面部分に塗布液３を供給すると、濡れのよい粗面部分４
のみに塗布液３がのシ、ドーナツ状の均−な供給が容易
に行なわれる。その後所定の回転数で基板を回転させて
塗布を完了する。The present invention utilizes the fact that the degree of liquid wetting differs between smooth surfaces and roughened surfaces. As shown in FIG. 2, a roughened donut-shaped portion 4 is previously formed around the center hole 2 of the substrate 1. When such a substrate 1 is set in a spin coater and the coating liquid 3 is supplied to the rough surface portion while rotating at low speed, the rough surface portion 4 is coated with good wettability.
As a result, the coating liquid 3 can be easily supplied evenly in a donut shape. Thereafter, the substrate is rotated at a predetermined rotation speed to complete the coating.
光学式記録媒体の場合、情報トラックの追従性を向上す
るため案内溝を設けることがしばしば行なわれるが、上
記粗面として同様の溝を適当幅設けておくことで目的が
達せられる。この場合、案内溝形成と同時に上記粗面部
を形成できるので便利である。In the case of optical recording media, guide grooves are often provided in order to improve followability of information tracks, but this purpose can be achieved by providing similar grooves with an appropriate width as the rough surface. In this case, it is convenient because the rough surface portion can be formed at the same time as the guide groove is formed.
本発明における基板としては、当業者において知られて
いるものならばどれでも用いることができ、例えばガラ
スおよびプラスチックなどをあげることができる。特に
プラスチックが安全性、記録感度向上および平面性の観
点から好適である。プラスチックとしてはアクリル、ポ
リカーボネート、ポリスルホン、ポリイミドなどが用い
られる。As the substrate in the present invention, any substrate known to those skilled in the art can be used, such as glass and plastic. In particular, plastic is suitable from the viewpoints of safety, improved recording sensitivity, and flatness. Acrylic, polycarbonate, polysulfone, polyimide, etc. are used as the plastic.
本発明における粗面化された部分を形成する方法として
は研磨、溝付けなどの機械的加工またはエツチング、電
解研磨などの化学的加工を用いることができる。一般的
に、粗面化された部分は複数の極めて隣接した同心円状
または螺旋状の微細な溝からなっている。粗面化された
部分の表面粗さはＧ、ＩＳ〜０．５８の範囲が適当であ
る。As a method for forming the roughened portion in the present invention, mechanical processing such as polishing and grooving, or chemical processing such as etching and electrolytic polishing can be used. Generally, the roughened portion consists of a plurality of closely adjacent concentric or spiral microscopic grooves. The surface roughness of the roughened portion is suitably in the range of G, IS to 0.58.
実施例
以下、本発明の一実施例を掲げるが、これは例示の目的
のためのものであって本発明はこれに限定されるもので
はない。EXAMPLE An example of the present invention will be described below, but this is for the purpose of illustration and the present invention is not limited thereto.
中心に穴のあいたディスク状アクリル基板の穴の周辺の
内径３０聾、幅５ｍｍの部分に間隔４μｍで螺旋状に微
細な溝を形成した。この基板をスピンコーターにセット
し、６Ｏｒｐｍで回転させながらスポイトで
ポリビニルアルコール １ｆ水
９ｆ硝酸銀
０．５１
２８俤アンモニア水 ０．５−ブドウ糖
０．５１
からなる銀鏡用の鉄液（粘度約３０ ｃｐｓ ）の総量
１．５−を１秒で供給したところ、ドーナツ状に均一な
供給が行なわれた。更に、回転数３０００ｒｐｍで基板
を回転させ塗布を行なった結果、穴のない基板に通常の
方法でスピンコーティングを行なって得られる塗布膜と
同等の品質の塗布膜が得られた。Fine spiral grooves were formed at intervals of 4 μm around the hole of a disk-shaped acrylic substrate having a hole in the center, with an inner diameter of 30 mm and a width of 5 mm. Set this substrate on a spin coater, and apply 1f water with polyvinyl alcohol using a dropper while rotating at 6 Orpm.
9f silver nitrate
0.51 28 tons of ammonia water 0.5-Glucose
When a total amount of 1.5-cm of iron solution for silver mirrors (viscosity: about 30 cps) consisting of 0.51% was supplied in 1 second, uniform supply was carried out in a donut shape. Furthermore, coating was performed by rotating the substrate at a rotation speed of 3000 rpm, and as a result, a coating film with the same quality as a coating film obtained by performing spin coating on a substrate without holes using a conventional method was obtained.
効果
上述したように本発明に係るディスク状基板を用いれば
スピンコーティングにょｉｌ上に塗布液を一様に供給す
ることができかくして高精度の供給装置を必要としない
という利点が得られる。Effects As described above, the use of the disk-shaped substrate according to the present invention provides the advantage that the coating liquid can be uniformly supplied onto the spin coating film, thus eliminating the need for a highly accurate supply device.
第１図は従来の塗布液供給方法を示す概略図でありそし
て第２図は本発明に係るディスク状基板の平面図である
。
１・・・基板、２・・・中心穴、６・・・塗布液、４・
・・粗面化されたドーナツ部分。FIG. 1 is a schematic view showing a conventional coating liquid supply method, and FIG. 2 is a plan view of a disk-shaped substrate according to the present invention. 1... Substrate, 2... Center hole, 6... Coating liquid, 4...
... Roughened donut part.
Claims (1)
とを特徴とする、ディスク状基板。A disk-shaped substrate characterized by having a roughened donut-shaped portion around a central hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57186144A JPS5977645A (en) | 1982-10-25 | 1982-10-25 | Discoid substrate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57186144A JPS5977645A (en) | 1982-10-25 | 1982-10-25 | Discoid substrate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5977645A true JPS5977645A (en) | 1984-05-04 |
Family
ID=16183144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57186144A Pending JPS5977645A (en) | 1982-10-25 | 1982-10-25 | Discoid substrate |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5977645A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59153621U (en) * | 1983-03-29 | 1984-10-15 | 富士写真フイルム株式会社 | flexible magnetic disk |
| JPS60142867U (en) * | 1984-03-02 | 1985-09-21 | 電子精工株式会社 | Flotspie disc |
| JPS62239486A (en) * | 1986-04-10 | 1987-10-20 | Matsushita Electric Ind Co Ltd | Information recording disk and its reproducing device |
| DE102004026819A1 (en) * | 2004-06-02 | 2006-01-26 | Steag Hamatech Ag | Production of a partially reflecting layer of optical data carrier, especially a compact disk or digital versatile disk, comprises applying liquid containing reflecting particles on a surface of a disk-like substrate and drying the liquid |
-
1982
- 1982-10-25 JP JP57186144A patent/JPS5977645A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59153621U (en) * | 1983-03-29 | 1984-10-15 | 富士写真フイルム株式会社 | flexible magnetic disk |
| JPH0341341Y2 (en) * | 1983-03-29 | 1991-08-30 | ||
| JPS60142867U (en) * | 1984-03-02 | 1985-09-21 | 電子精工株式会社 | Flotspie disc |
| JPS62239486A (en) * | 1986-04-10 | 1987-10-20 | Matsushita Electric Ind Co Ltd | Information recording disk and its reproducing device |
| DE102004026819A1 (en) * | 2004-06-02 | 2006-01-26 | Steag Hamatech Ag | Production of a partially reflecting layer of optical data carrier, especially a compact disk or digital versatile disk, comprises applying liquid containing reflecting particles on a surface of a disk-like substrate and drying the liquid |
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