JPH0467316A - Magnetic disk medium - Google Patents
Magnetic disk mediumInfo
- Publication number
- JPH0467316A JPH0467316A JP17562490A JP17562490A JPH0467316A JP H0467316 A JPH0467316 A JP H0467316A JP 17562490 A JP17562490 A JP 17562490A JP 17562490 A JP17562490 A JP 17562490A JP H0467316 A JPH0467316 A JP H0467316A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- disk medium
- film
- lubricant
- lubricating film
- 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
- 239000000314 lubricant Substances 0.000 claims abstract description 20
- 238000000034 method Methods 0.000 claims description 21
- 239000000126 substance Substances 0.000 claims description 5
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 claims 2
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000007788 liquid Substances 0.000 claims 1
- 239000010408 film Substances 0.000 abstract description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 16
- 230000001050 lubricating effect Effects 0.000 abstract description 12
- 125000000524 functional group Chemical group 0.000 abstract description 3
- 239000010702 perfluoropolyether Substances 0.000 abstract description 3
- 239000010409 thin film Substances 0.000 abstract description 3
- 238000001074 Langmuir--Blodgett assembly Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 4
- 238000005755 formation reaction Methods 0.000 description 4
- 238000007598 dipping method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000004721 Polyphenylene oxide Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003085 diluting agent Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 230000005660 hydrophilic surface Effects 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 229920000570 polyether Polymers 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は情報の記録再生を行うための磁気ディスク媒体
に関し、特に、磁気ディスク媒体の磁性層表面と磁気ヘ
ッドとの接触摺動による磨耗を軽減し、磁気ヘッドによ
る磁気ディスク媒体表面の損傷（−数的には、ヘッド・
クラッシュという）を防止し、信頼性を高めた磁気ディ
スク媒体に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic disk medium for recording and reproducing information, and in particular, to a magnetic disk medium for recording and reproducing information. damage to the magnetic disk medium surface caused by the magnetic head (numerically,
This invention relates to a magnetic disk medium that prevents crashes (referred to as crashes) and improves reliability.
従来、この種の固定磁気ディスク装置に使用されている
磁気ディスク媒体は磁気ヘッドと接触しながら摺動運動
を行うため、基板の上に塗布法またはメツキ法またはス
パッタ法等で形成した磁性体層に磨耗が生ずる。Conventionally, the magnetic disk medium used in this type of fixed magnetic disk device performs sliding motion while contacting the magnetic head, so a magnetic layer is formed on the substrate by a coating method, plating method, sputtering method, etc. wear occurs.
これを防止するため、従来は、磁性体層の上に潤滑剤と
してパーフロロポリエーテル等の高分子含弗素化合物を
、スプレー法、あるいは、スピンコード法、あるいは、
ディッピング法によって塗布した媒体を使用している。To prevent this, conventionally, a polymeric fluorine-containing compound such as perfluoropolyether is applied as a lubricant onto the magnetic layer using a spray method, a spin code method, or
A medium applied by a dipping method is used.
また、最近では、潤滑膜を単分子レベルの薄膜で付与で
き、がっ、累積も可能なラングミュア・プロジェット法
（Ｌａｎｇｍｕｉｒ Ｂｌｏｄｇｅｉｔ法、以下、Ｌ
、Ｂ法と略す）によって潤滑膜を付与した磁気ディスク
媒体の開発も盛んに行われている。Recently, the Langmuir-Blodgeit method (hereinafter referred to as L
, abbreviated as the B method), magnetic disk media to which a lubricating film is applied are also actively being developed.
ここで、従来例について図面を参照して説明する。Here, a conventional example will be explained with reference to the drawings.
第２図（Ａ）および（Ｂ）は従来例の磁気ディスク媒体
において磁気ディスク媒体表面にり、Ｂ法によって成膜
する方法を示す図である。FIGS. 2A and 2B are diagrams showing a method of forming a film on the surface of a conventional magnetic disk medium by Method B.
第２図において、水中から磁気ディスク媒体を第２図（
Ａ）から第２図（Ｂ）のように引き上げる際の、水面と
成膜する磁気ディスク媒体表面の角度は９０°である。In Figure 2, the magnetic disk medium is removed from water (Figure 2).
The angle between the water surface and the surface of the magnetic disk medium on which a film is to be formed is 90° when the magnetic disk medium is pulled up from A) as shown in FIG. 2(B).
この場合、垂直方向への引き上げでは成膜されない部分
ができてしまい、アイランド状の潤滑膜となる。In this case, when the film is pulled up in the vertical direction, a portion is not formed, resulting in an island-like lubricating film.
上述した従来の磁気ディスク媒体に用いられている潤滑
剤塗布方法、例えば、スプレー法、あるいは、ディッピ
ング法では、潤滑膜を単分子レベルの薄膜にすることは
困難である。With the lubricant application methods used in the conventional magnetic disk media described above, such as spraying or dipping, it is difficult to form a lubricant film into a monomolecular-level thin film.
最近の磁気ディスク媒体の高性能化に対応するには、潤
滑膜を単分子レベルの薄膜にすることが必須であり、こ
れが可能なのは、Ｌ、Ｂ法による成膜以外にない。In order to respond to the recent high performance of magnetic disk media, it is essential to make the lubricating film a thin film at the monomolecular level, and this is only possible by film formation using the L, B method.
しかしながら、Ｌ、Ｂ法による成膜では単分子レベルの
薄膜にすることは可能なものの、磁気ディスク媒体の表
面の化学的性質が一定ではない場合は、第２図に示すよ
うな従来のり、Ｂ成膜方法である垂直方向への引き上げ
では成膜されない部分ができてしまい、アイランド状の
潤滑膜となり、磁気ディスク媒体の表面の十分な耐久性
を得ることはできないという欠点がある。However, although it is possible to form a film as thin as a single molecule using the L and B methods, if the chemical properties of the surface of the magnetic disk medium are not constant, conventional methods such as B and B as shown in Figure 2 may be used. The film forming method, which is pulling in the vertical direction, has the disadvantage that there are areas where the film is not formed, resulting in an island-like lubricating film, and it is not possible to obtain sufficient durability on the surface of the magnetic disk medium.
本発明の磁気ディスク媒体は、上記した従来の磁気ディ
スク媒体の欠点を解消したものであり、磁気ディスク媒
体表面にり、Ｂ法によって潤滑膜を付与する際に、官能
基を有するパーフロロポリエーテル等を潤滑剤として水
面に展開した後、水中から磁気ディスク媒体を引き上げ
る時に、水面と成膜する磁気ディスク媒体表面の角度を
９０”を越えた任意の一定の角度とすることによってこ
れらの問題を解決している。The magnetic disk medium of the present invention eliminates the drawbacks of the conventional magnetic disk medium described above, and when applying a lubricating film on the surface of the magnetic disk medium by method B, perfluoropolyether having a functional group is used. These problems can be solved by setting the angle between the water surface and the surface of the magnetic disk medium on which a film is to be formed to be an arbitrary fixed angle exceeding 90" when the magnetic disk medium is pulled out of the water after spreading it on the water surface as a lubricant. It's resolved.
次に、本発明について図面を参照して説明する。 Next, the present invention will be explained with reference to the drawings.
第１図（Ａ）および（Ｂ）は本発明の一実施例の磁気デ
ィスク媒体において磁気ディスク媒体表面にり、Ｂ法に
よって成膜する方法を示す図である。FIGS. 1A and 1B are diagrams showing a method of forming a film on the surface of a magnetic disk medium according to method B in an embodiment of the present invention.
第１図（Ａ）において、磁気ディスク媒体１は、まず、
水２中に浸漬され、次いで水２表面に潤滑剤３が展開さ
れる。In FIG. 1(A), the magnetic disk medium 1 first has
It is immersed in water 2, and then a lubricant 3 is spread on the surface of the water 2.
ここに用いられる潤滑剤は化学式、
のバー７０ロポリエーテル、ＫＲＹＴＯＸ１５７−ＦＳ
（商品名：デュポン（米国））である。The lubricant used here has the chemical formula: Bar 70 polyether, KRYTOX157-FS
(Product name: DuPont (USA)).
潤滑剤であ６ＫＲＹＴＯＸ１５７−ＦＳはソノ分子の一
端に官能基を有する両親媒性物質であるので、水２表面
に展開すると親水基３ａを水２側にして単分子膜を形成
する。Since the lubricant 6KRYTOX157-FS is an amphiphilic substance having a functional group at one end of the sonomolecule, when it is developed on the surface of the water 2, it forms a monomolecular film with the hydrophilic group 3a facing the water 2 side.
この状態で水２中より磁気ディスク媒体１をある一定の
角度で傾斜させて引き上げると、第１図（Ｂ）のように
親水基３ａを親水性のある磁気ディスク媒体１表面側に
して潤滑剤３は移転、成膜される。In this state, when the magnetic disk medium 1 is tilted at a certain angle and pulled up from the water 2, the hydrophilic group 3a is placed on the hydrophilic surface side of the magnetic disk medium 1 and the lubricant is applied. 3 is transferred and film-formed.
この場合、磁気ディスク媒体１の引き上げ方向は垂直方
向でも、傾けた方向でも成膜結果はほぼ同一である。In this case, the film formation result is almost the same whether the magnetic disk medium 1 is pulled up in a vertical direction or in an inclined direction.
第３図は、上述した実施例と従来例の磁気ディスク媒体
表面における潤滑膜厚の面内バラツキを比較した図であ
る。FIG. 3 is a diagram comparing in-plane variations in the lubricant film thickness on the magnetic disk medium surface of the above-described embodiment and the conventional example.
ここで、用いたサンプルは５．２５インチ塗布型ディス
クであり、Ｌ、Ｂ成膜条件は次の通りとした。The sample used here was a 5.25-inch coated disk, and the L and B film formation conditions were as follows.
展開液濃度 ：１．０ｗｔ％
希釈液 ニトリフロロトリクロルエタン
下層液 ：純水（ｐＨ＝７．０．）温度＝＝
２０℃）
表面圧力 ：２５．ＯｍＮ／ｍ媒体傾斜（実施
例）＋１３５゜
引き上げ速度 ：５０ｍｍ／ｍｉｎ引き上げ方向
：垂直
成膜回数 ：１回
第３図に示すように、従来例ではところどころ膜厚の薄
いところがあり、潤滑膜が明らかにアイランド状になっ
ている。Developing solution concentration: 1.0wt% Diluent Nitrifluorotrichloroethane Lower layer solution: Pure water (pH=7.0.) Temperature==
20℃) Surface pressure: 25. OmN/m Media inclination (Example) + 135° Pulling speed: 50 mm/min Pulling direction
: Number of vertical film formations: 1 time As shown in FIG. 3, in the conventional example, the film thickness is thin in some places, and the lubricating film clearly has an island shape.
これに対して本実施例では潤滑膜厚のバラツキは非常に
小さく、従来例に比べて均一な潤滑膜が成膜されること
が認められる。On the other hand, in this example, the variation in the lubricant film thickness is very small, and it is recognized that a more uniform lubricant film is formed than in the conventional example.
以上説明したように本発明によれば、磁気ディスク媒体
表面にり、Ｂ法によって潤滑膜を付与する際に、磁気デ
ィスク媒体を９０°を越えた任意の一定の角度に傾斜さ
せて成膜することによって、潤滑膜厚の均一性をより改
善した磁気ディスク媒体を供給することができるという
効果がある。As explained above, according to the present invention, when applying a lubricating film to the surface of a magnetic disk medium by method B, the film is formed by tilting the magnetic disk medium at an arbitrary fixed angle exceeding 90 degrees. This has the effect that a magnetic disk medium with improved uniformity of lubricant film thickness can be provided.
第１図（Ａ）および（Ｂ）は本発明の一実施例の磁気デ
ィスク媒体において磁気ディスク媒体表面にり、Ｂ法に
よって成膜する方法を示す図、第２図（Ａ＞および（Ｂ
）は従来例の磁気ディスク媒体において磁気ディスク媒
体表面にり、Ｂ法によって成膜する方法を示す図、第３
図は上述した実施例と従来例の磁気ディスク媒体表面に
おける潤滑膜厚の面内バラツキを比較した図である。
１・・・磁気ディスク媒体、２・・・水、３・・・潤滑
剤、３ａ・・・親水基、４・・・磁気ディスク媒体、５
・・・水、６・・・潤滑剤、６ａ・・・親水基。1A and 1B are diagrams showing a method of forming a film on the surface of a magnetic disk medium according to an embodiment of the present invention by method B, and FIGS.
) is a diagram showing a method of forming a film on the surface of a magnetic disk medium using method B in a conventional magnetic disk medium;
The figure is a diagram comparing in-plane variations in the lubricant film thickness on the surface of a magnetic disk medium between the above-mentioned embodiment and a conventional example. DESCRIPTION OF SYMBOLS 1...Magnetic disk medium, 2...Water, 3...Lubricant, 3a...Hydrophilic group, 4...Magnetic disk medium, 5
...Water, 6...Lubricant, 6a...Hydrophilic group.
Claims (1)
ロジェット法によって付与し潤滑膜を形成する磁気ディ
スク媒体において、 下層液の表面に展開剤である親水基を有する潤滑剤を展
開した槽より前記磁気ディスク媒体を引上げる時の成膜
角度を９０゜を越えた任意の一定の角度としたことを特
徴とする磁気ディスク媒体。 ２、請求項１記載の磁気ディスク媒体において、磁気デ
ィスク媒体表面にラングミュア・プロジェット法によっ
て付与する潤滑剤が、化学式、▲数式、化学式、表等が
あります▼で表されるパーフロロポリエルエーテルであ
ることを特徴とする磁気ディスク媒体。[Scope of Claims] 1. In a magnetic disk medium in which a lubricant is applied to the surface of a magnetic disk medium by the Langmuir-Prodgett method to form a lubricant film, a lubricant having a hydrophilic group as a developing agent is applied to the surface of a lower layer liquid. A magnetic disk medium characterized in that the film forming angle when the magnetic disk medium is pulled up from the developed tank is set to an arbitrary constant angle exceeding 90 degrees. 2. In the magnetic disk medium according to claim 1, the lubricant applied to the surface of the magnetic disk medium by Langmuir-Prodgett method is perfluoropolyel ether represented by the chemical formula, ▲numerical formula, chemical formula, table, etc. A magnetic disk medium characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17562490A JPH0467316A (en) | 1990-07-03 | 1990-07-03 | Magnetic disk medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17562490A JPH0467316A (en) | 1990-07-03 | 1990-07-03 | Magnetic disk medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0467316A true JPH0467316A (en) | 1992-03-03 |
Family
ID=15999342
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17562490A Pending JPH0467316A (en) | 1990-07-03 | 1990-07-03 | Magnetic disk medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0467316A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006092679A (en) * | 2004-09-24 | 2006-04-06 | Hoya Corp | Magnetic disk and its manufacturing method |
| JP2008047284A (en) * | 2007-09-21 | 2008-02-28 | Hoya Corp | Magnetic disk |
-
1990
- 1990-07-03 JP JP17562490A patent/JPH0467316A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006092679A (en) * | 2004-09-24 | 2006-04-06 | Hoya Corp | Magnetic disk and its manufacturing method |
| JP2008047284A (en) * | 2007-09-21 | 2008-02-28 | Hoya Corp | Magnetic disk |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5049410A (en) | Lubricant film for a thin-film disk | |
| US5536577A (en) | Magnetic recording medium comprising a protective layer and a lubricant layer which contains a host multidentate ligand and a guest reversibly trapped lubricant | |
| KR920006125B1 (en) | Surface lubricants for recording surface | |
| US6500484B2 (en) | Magnetic recording media | |
| JPH0467316A (en) | Magnetic disk medium | |
| JP4534906B2 (en) | Magnetic recording medium and manufacturing method thereof | |
| JPH0519765B2 (en) | ||
| KR100284363B1 (en) | Magnetic recording media | |
| JPH0952707A (en) | Production of thin film | |
| JPH03232180A (en) | Magnetic disk device and its production | |
| JPH03232179A (en) | Magnetic disk device | |
| EP0856837A1 (en) | Magnetic disk and magnetic recording/reproduction apparatus | |
| KR100284206B1 (en) | Magnetic recording media | |
| JPS63274467A (en) | Formation of protective film consisting of high molecular fluorine-containing compound | |
| JPH03119580A (en) | Magnetic disk device | |
| JP2002352420A (en) | Method and apparatus for manufacturing magnetic recording medium | |
| JP2001058149A (en) | Thin film forming device and formation of thin film | |
| JPS62246137A (en) | Magnetic recording medium | |
| JPH01298520A (en) | Formation of protective film of fluorine-containing polymer compound | |
| JP2638228B2 (en) | Manufacturing method of magnetic recording medium | |
| JPH02149923A (en) | Production of thin-film magnetic recording medium | |
| JPH0330180A (en) | Magnetic disk device | |
| JPH08231455A (en) | Triblock compound, lubricating agent and magnetic recording medium | |
| JPH0554378A (en) | Production of magnetic disk medium | |
| JPH02261568A (en) | Coating method |