JPS63276712A - Magnetic disk medium - Google Patents
Magnetic disk mediumInfo
- Publication number
- JPS63276712A JPS63276712A JP11083287A JP11083287A JPS63276712A JP S63276712 A JPS63276712 A JP S63276712A JP 11083287 A JP11083287 A JP 11083287A JP 11083287 A JP11083287 A JP 11083287A JP S63276712 A JPS63276712 A JP S63276712A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- disk medium
- magnetic
- self
- fine particles
- 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
- 239000010419 fine particle Substances 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 12
- 239000002245 particle Substances 0.000 claims abstract description 8
- 239000000314 lubricant Substances 0.000 claims description 13
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011230 binding agent Substances 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 abstract description 3
- ZQKXQUJXLSSJCH-UHFFFAOYSA-N melamine cyanurate Chemical compound NC1=NC(N)=NC(N)=N1.O=C1NC(=O)NC(=O)N1 ZQKXQUJXLSSJCH-UHFFFAOYSA-N 0.000 abstract description 3
- 239000004593 Epoxy Substances 0.000 abstract description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract description 2
- 229910002804 graphite Inorganic materials 0.000 abstract description 2
- 239000010439 graphite Substances 0.000 abstract description 2
- 229920001343 polytetrafluoroethylene Polymers 0.000 abstract description 2
- 239000004810 polytetrafluoroethylene Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 229910007156 Si(OH)4 Inorganic materials 0.000 abstract 1
- 229940058401 polytetrafluoroethylene Drugs 0.000 abstract 1
- 239000010408 film Substances 0.000 description 12
- 238000001179 sorption measurement Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000001050 lubricating effect Effects 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229920000139 polyethylene terephthalate Polymers 0.000 description 2
- 239000005020 polyethylene terephthalate Substances 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000000717 retained effect Effects 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 229920001187 thermosetting polymer Polymers 0.000 description 1
Landscapes
- Lubricants (AREA)
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分計〉
本発明は、磁気ディスク装置等で磁気ヘッドと組み合わ
せて使用される磁気記録媒体に関するもので、特に摩擦
・摩耗特性に優れた磁気ディスク媒体に関する。[Detailed Description of the Invention] <Industrial Application> The present invention relates to a magnetic recording medium used in combination with a magnetic head in a magnetic disk device, etc., and particularly a magnetic disk medium with excellent friction and wear characteristics. Regarding.
〈従来の技術〉
磁気テープ装置あるいはフロッピーディスク装置のよう
に、所謂ポリエチレンテレフタレート（以下、ＰＥＴと
略称する。）等の可撓体の基板上に磁性膜を形成した磁
気記録装置では信号の記録再生時に磁気ヘッドと磁気記
録媒体が接触走行している。<Prior art> In a magnetic recording device such as a magnetic tape device or a floppy disk device, in which a magnetic film is formed on a flexible substrate such as so-called polyethylene terephthalate (hereinafter abbreviated as PET), signals are recorded and reproduced. At times, the magnetic head and the magnetic recording medium are running in contact with each other.
一方、アルミニウム合金等の剛性が高い基板上に磁性膜
を形成した磁気ディスク媒体を用いる磁気ディスク装置
においては、動圧気体軸受である浮動へラドスライダを
用いて高速回転する磁気ディスク媒体上に磁気ヘッドを
微小なすきまで浮上させて記録再生を行っている。On the other hand, in magnetic disk drives that use magnetic disk media in which a magnetic film is formed on a highly rigid substrate such as an aluminum alloy, a magnetic head is mounted on a magnetic disk medium that rotates at high speed using a floating RAD slider, which is a hydrodynamic gas bearing. Recording and playback are carried out by floating up to a minute gap.
このような磁気ディスク装置において、塵埃の混入等の
外乱、ボジシアナ等の機構部あるいは磁気ディスク媒体
等の振動等によって磁気ヘッドの浮上すきまが低下した
場合には、磁気ヘッドと磁気ディスク媒体が間欠的に接
触する。In such a magnetic disk drive, if the flying clearance of the magnetic head decreases due to disturbances such as intrusion of dust, vibrations of the mechanical part such as the body analyzer, or the magnetic disk medium, etc., the magnetic head and the magnetic disk medium may intermittent come into contact with.
また、近年では磁気ヘッドを磁気ディスク媒体上に接触
させた状態で、ディスク媒体の回転を開始し、駆動モー
タにより回転・停止を行うコンタクトスタートストップ
方式（いわゆるＣ８Ｓ方式）の磁気ディスク装置が主流
になってきている。このようなＣ８Ｓ方式を採用した磁
気ディスク装置において、磁気ディスク媒体の回転が一
定以下の状態では、磁気ヘッドと磁気ディスク媒体の隙
間が所期の値に達しないため、磁気ヘッドと磁気ディス
ク媒体の接触走行が起こる。In addition, in recent years, contact start/stop type (so-called C8S type) magnetic disk drives have become mainstream, in which the rotation of the disk medium is started with the magnetic head in contact with the magnetic disk medium, and the drive motor rotates and stops the disk medium. It has become to. In a magnetic disk drive employing such a C8S method, when the rotation of the magnetic disk medium is below a certain level, the gap between the magnetic head and the magnetic disk medium does not reach the desired value. Contact running occurs.
この場合、磁気ディスク媒体の磁性膜は潤滑性を有さず
、或いは有しても極めて低い潤滑性であるため長時間の
接触走行が起こると、磁気ヘッドあるいは磁気ディスク
媒体が摩耗し、所謂ヘッドクラッシュが生じる。In this case, the magnetic film of the magnetic disk medium has no lubricity, or even if it does, the lubricity is extremely low, so if contact running for a long time occurs, the magnetic head or magnetic disk medium will wear out, causing the so-called head A crash occurs.
そこで一般に、磁気ディスク媒体表面に潤滑剤をオーバ
コートする、あるいは硬質の保護膜を形成し、保護膜の
上に潤滑剤をオーバコートして潤滑性を高めることが行
われている。Therefore, in general, the surface of the magnetic disk medium is overcoated with a lubricant, or a hard protective film is formed, and the protective film is overcoated with a lubricant to improve lubricity.
ところが、潤滑剤を磁気ディスク媒体表面で多重に使用
すると、磁気ヘッドと磁気ディスク媒体の摩擦係数が大
きくなり、駆動モータの回転起動時に吸着が起こり、両
者が損傷する。However, if multiple lubricants are used on the surface of the magnetic disk medium, the coefficient of friction between the magnetic head and the magnetic disk medium becomes large, and adhesion occurs when the drive motor starts rotating, damaging both.
したがって、磁気ディスク媒体表面にオーバコートする
潤滑剤はｙｇ１擦係数を高めない範囲で適量用いる必要
がある。Therefore, it is necessary to use an appropriate amount of lubricant to overcoat the surface of the magnetic disk medium without increasing the yg1 friction coefficient.
特に、スパッタ法或いはめっき法で磁性膜を形成した連
続薄膜媒体ではその表面が従来の酸化鉄微粒子をコーテ
ィングした塗布媒体に比べて平滑であるため、吸着の防
止が重要である。また、吸着の防止と同時に、耐摩耗性
を向上することが重要である。In particular, since the surface of a continuous thin film medium in which a magnetic film is formed by sputtering or plating is smoother than that of a conventional coating medium coated with iron oxide fine particles, prevention of adsorption is important. Furthermore, it is important to prevent adsorption and at the same time improve wear resistance.
〈発明が解決しようキする問題点〉
ところが、このようなスパッタ法あるいはめつぎ法によ
り磁性膜を形成した連続薄膜媒体と磁気ヘッドの吸着を
防止するためには、潤滑剤を薄く塗布することが必要で
ある。しかし、潤滑剤を薄くすると耐摩耗性が低下する
といった問題があった。<Problems to be solved by the invention> However, in order to prevent the magnetic head from adhering to a continuous thin film medium on which a magnetic film is formed by such sputtering or plating methods, it is necessary to apply a thin layer of lubricant. is necessary. However, there was a problem in that when the lubricant was made thinner, the wear resistance decreased.
本発明は、自己潤滑性微粒子による高い耐摩耗性が得ら
れ、耐摩耗性向上に効果が高い多量の潤滑剤を塗布でき
ると同時に吸着が防止できる耐久性が高い磁気ディスク
媒体を提供しようとするものである。The present invention aims to provide a highly durable magnetic disk medium that can obtain high wear resistance due to self-lubricating fine particles, can apply a large amount of lubricant that is highly effective in improving wear resistance, and can prevent adsorption at the same time. It is something.
く問題点を解決するための手段〉
本発明は、磁気ディスク媒体における上記の如き欠点を
解決すべく種々検討し、研究を ・重ねた結果、磁気デ
ィスク媒体表面に自己潤滑性固体微粒子を固定したこと
を特徴としたものであって、ある高さ以下で多数の微小
な凸部を形成することにより、該自己潤滑性微粒子によ
る高い耐摩耗性を得られるようにしたものである。さら
に、＃４摩耗性向上に効果の高い多量の潤滑剤を磁気デ
ィスク媒体表面に保持でき、同時に吸着が防止できるこ
とを特徴としている。Means for Solving the Problems> As a result of various studies and repeated research in order to solve the above-mentioned drawbacks of magnetic disk media, the present invention has been developed by fixing self-lubricating solid particles on the surface of magnetic disk media. By forming a large number of minute convex portions below a certain height, high wear resistance can be obtained due to the self-lubricating fine particles. Further, it is characterized in that a large amount of lubricant, which is highly effective in improving #4 abrasion resistance, can be retained on the surface of the magnetic disk medium, and at the same time, adsorption can be prevented.
本発明に従う磁気ディスク媒体において使用しうる固体
微粒子としては、潤滑性を有する材料、例えばメラミン
シアヌレート（以下、ＭＣＡと略称する。）やポリテト
ラフロ四エチレン（以下、ＰＴＦＥと略称する。）、黒
鉛、フッ化黒鉛等が使用できる。Solid particles that can be used in the magnetic disk medium according to the present invention include materials having lubricating properties, such as melamine cyanurate (hereinafter abbreviated as MCA), polytetrafluoro-tetraethylene (hereinafter abbreviated as PTFE), graphite, Fluorinated graphite etc. can be used.
また、熱硬化により自己潤滑性微粒子を固定するための
溶質としてはフェノール、エポキシ等の樹脂やＳ ｉ
（ＯＨ）４などを含むアルコール溶液等を用いることが
できる。In addition, solutes for fixing self-lubricating fine particles by thermosetting include resins such as phenol and epoxy, and Si
An alcohol solution containing (OH)4 or the like can be used.
く実 施 例〉
以下、本発明の磁気ディスク媒体を具体例によって詳細
に説明するが、本発明は下記の実施例によって何等制限
されるものではない。Embodiments Hereinafter, the magnetic disk medium of the present invention will be explained in detail using specific examples, but the present invention is not limited in any way by the following examples.
第１図に本発明の磁気ディスク媒体の例を示す。基板１
の上に磁性膜２を形成し、磁性膜の上に潤滑性を有する
固体微粒子３を固体微粒子を固定することが可能なバイ
ンダ４で固定することにより、微小な凸部が形成されて
いる。FIG. 1 shows an example of the magnetic disk medium of the present invention. Board 1
A minute convex portion is formed by forming a magnetic film 2 on the magnetic film and fixing solid fine particles 3 having lubricating properties on the magnetic film with a binder 4 capable of fixing the solid fine particles.
第２図ｆａ）に、本発明の磁気ディスク媒体の表面粗さ
曲線を、第２図ｆｂ）に従来の磁気ディスク媒体の表面
粗さ曲線を示す。ここで、本発明の磁気ディスク媒体は
５ｉ（ＯＨ）、を含むアルコール溶液１００ ｃｃ中に
メラミンシアヌレート（息下、ＭＣＡと略称する。）の
微粒子１ｇを分散させた溶液を作成し、この溶液を磁性
膜にスピンコード塗布し、塗布後３００℃の温度で焼成
した磁気ディスク媒体である。FIG. 2fa) shows the surface roughness curve of the magnetic disk medium of the present invention, and FIG. 2fb) shows the surface roughness curve of the conventional magnetic disk medium. Here, the magnetic disk medium of the present invention is prepared by preparing a solution in which 1 g of fine particles of melamine cyanurate (abbreviated as MCA) is dispersed in 100 cc of an alcohol solution containing 5i (OH). This is a magnetic disk medium in which a magnetic film is coated with a spin code and fired at a temperature of 300° C. after coating.
第２図から明らかなように、本発明の磁気ディスク媒体
表面には固体微粒子による高さ３００人前後の多数の微
小な凸部が均一に形成されていることが判明しな。As is clear from FIG. 2, it has been found that on the surface of the magnetic disk medium of the present invention, a large number of minute protrusions with a height of about 300 mm are uniformly formed by solid particles.
第３図に、第２図に示した磁気ディスク媒体の表面に濃
度が０．１％のＰＦＰＥ潤滑剤（Ｘｒｙｔｏｘ ）溶液
を塗布後、磁気ヘッドとの摩擦係数を測定した例を示す
。第３図から明らかなように、従来の磁気ディスク媒体
では磁気ヘッドとの摩擦係数が急増して吸着がおこるが
、本発明の磁気ディスク媒体では従来の磁気ディスク媒
体では吸着が起こる多量な潤滑剤を塗布しても０．０３
前後の極めて低い摩擦係数が得られることが判明した。FIG. 3 shows an example in which a PFPE lubricant (Xrytox) solution with a concentration of 0.1% was applied to the surface of the magnetic disk medium shown in FIG. 2, and then the coefficient of friction with the magnetic head was measured. As is clear from FIG. 3, in the conventional magnetic disk medium, the coefficient of friction with the magnetic head rapidly increases, causing adhesion, but in the magnetic disk medium of the present invention, a large amount of lubricant, which causes adhesion in the conventional magnetic disk medium, Even if applied, 0.03
It has been found that an extremely low coefficient of friction can be obtained in the front and rear.
〈発明の効果〉
本発明の磁気ディスク媒体によれば、自己潤滑性徴粒子
による高い耐摩耗性が得られ、さらに耐摩耗性向上に効
果の窩い多量の潤滑剤を磁気ディスク媒体表面に保持で
き、同時に吸着が防止できる。従って、磁気ヘッドの動
作安定性、耐久性に顕著な効果が発揮され、磁気ヘッド
の低浮上化、Ｃ８Ｓ方式を採用した磁気ディスク装置等
に適用して極めて有効である。<Effects of the Invention> According to the magnetic disk medium of the present invention, high wear resistance can be obtained due to the self-lubricating particles, and a large amount of lubricant, which is effective in improving the wear resistance, can be retained on the surface of the magnetic disk medium. At the same time, adsorption can be prevented. Therefore, a remarkable effect is exerted on the operational stability and durability of the magnetic head, and it is extremely effective when applied to a magnetic disk device, etc. that uses the C8S method and lowers the flying height of the magnetic head.
第１図は本発明における磁気ディスク媒体の概略図、第
２図（ａ） （ｂ）はそれぞれ本発明と従来の磁気ディ
スク媒体の表面粗さ曲線図、第３図は本発明と従来の磁
気ディスク媒体に潤滑剤を塗布して測定した磁気ディス
ク媒体と磁気ヘッドの９擦係数を示す特性図である。
図中、１・・・基板、２・・・磁性膜、３・・・固体微
粒子、４・・・バインダ。Fig. 1 is a schematic diagram of a magnetic disk medium according to the present invention, Fig. 2 (a) and (b) are surface roughness curve diagrams of a magnetic disk medium of the present invention and a conventional magnetic disk medium, respectively, and Fig. 3 is a schematic diagram of a magnetic disk medium of the present invention and a conventional magnetic disk medium. FIG. 2 is a characteristic diagram showing the coefficient of friction between a magnetic disk medium and a magnetic head measured by applying a lubricant to the disk medium. In the figure, 1...substrate, 2...magnetic film, 3...solid fine particles, 4...binder.
Claims (5)
多数固定したことを特徴とする磁気ディスク媒体。(1) A magnetic disk medium characterized by having a large number of self-lubricating solid particles fixed to the surface of the magnetic disk medium.
、微小な凸部を形成してなることを特徴とする特許請求
の範囲第（１）項記載の磁気ディスク媒体。(2) The magnetic disk medium according to claim (1), wherein the self-lubricating solid particles protrude from the surface of the medium to form minute convex portions.
後に、磁気ディスク媒体表面に該溶液を塗布してなるこ
とを特徴とする特許請求の範囲第（１）項記載の磁気デ
ィスク媒体。(3) The magnetic disk medium according to claim (1), wherein the self-lubricating solid fine particles are dispersed in a solution and then the solution is applied to the surface of the magnetic disk medium.
することにより自己潤滑性微粒子を固定することを特徴
とする特許請求の範囲第（１）項記載の磁気ディスク媒
体。(4) The magnetic disk medium according to claim (1), wherein the self-lubricating fine particles are fixed by thermally curing a solution containing the self-lubricating solid fine particles.
ることを特徴とする特許請求の範囲第（１）項記載の磁
気ディスク媒体。(5) The magnetic disk medium according to claim (1), wherein a lubricant is applied to the surface of the magnetic disk medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11083287A JPS63276712A (en) | 1987-05-08 | 1987-05-08 | Magnetic disk medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11083287A JPS63276712A (en) | 1987-05-08 | 1987-05-08 | Magnetic disk medium |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63276712A true JPS63276712A (en) | 1988-11-15 |
Family
ID=14545795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11083287A Pending JPS63276712A (en) | 1987-05-08 | 1987-05-08 | Magnetic disk medium |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63276712A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389398A (en) * | 1990-04-16 | 1995-02-14 | Hoya Corporation | Method of manufacturing magnetic recording medium for contact recording |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735971A (en) * | 1980-08-09 | 1982-02-26 | Matsushita Electric Ind Co Ltd | Formation of slipery thin film |
-
1987
- 1987-05-08 JP JP11083287A patent/JPS63276712A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5735971A (en) * | 1980-08-09 | 1982-02-26 | Matsushita Electric Ind Co Ltd | Formation of slipery thin film |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5389398A (en) * | 1990-04-16 | 1995-02-14 | Hoya Corporation | Method of manufacturing magnetic recording medium for contact recording |
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