JPH0863922A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPH0863922A JPH0863922A JP20047494A JP20047494A JPH0863922A JP H0863922 A JPH0863922 A JP H0863922A JP 20047494 A JP20047494 A JP 20047494A JP 20047494 A JP20047494 A JP 20047494A JP H0863922 A JPH0863922 A JP H0863922A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic disk
- magnetic
- head slider
- magnetic head
- disk device
- 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
- G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
- G11B5/48—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed
- G11B5/58—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following
- G11B5/581—Disposition or mounting of heads or head supports relative to record carriers ; arrangements of heads, e.g. for scanning the record carrier to increase the relative speed with provision for moving the head for the purpose of maintaining alignment of the head relative to the record carrier during transducing operation, e.g. to compensate for surface irregularities of the latter or for track following maintaining desired contact or spacing by direct interaction of forces generated between heads or supports thereof and record carriers or supports thereof, e.g. attraction-repulsion interactions
Landscapes
- Magnetic Record Carriers (AREA)
- Supporting Of Heads In Record-Carrier Devices (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はコンピュータなどに記憶
手段として用いられる磁気ディスク装置に関するもので
ある。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk device used as a storage means in a computer or the like.
【０００２】[0002]
【従来の技術】近年、情報記憶ファイルの分野におい
て、高記録密度化が着実に向上している。磁気ディスク
装置では、情報を読み書きする磁気ヘッドと情報を保持
している記録媒体との間隔を小さくすることが高密度化
の重要な要素の一つとなっている。2. Description of the Related Art In recent years, high recording density has been steadily improved in the field of information storage files. In a magnetic disk drive, reducing the distance between a magnetic head that reads and writes information and a recording medium that holds information is one of the important factors for higher density.
【０００３】磁気ヘッドと磁気ディスク媒体との間隔を
小さくするために、空気ベアリングの代わりに液体ベア
リングを用いた磁気ディスク装置が開発されている（特
開平４−１１３５６８号公報）。さらに、磁気ヘッドと
磁気ディスク媒体との間隔を小さくした接触式磁気記録
装置が開発されている（例えばＨ．Ｈａｍｉｌｔｏｎ：
Ｊｏｕｒｎａｌ ｏｆ ｔｈｅ Ｍａｇｎｅｔｉｃ Ｓ
ｏｃｉｅｔｙ ｏｆＪａｐａｎ，Ｖｏｌ．１５，Ｓｕｐ
ｐｌｅｍｅｎｔ Ｎｏ．Ｓ２（１９９１）４８３ およ
び国際公開第９３／１４４９５号パンフレット）。接触
式磁気記録装置は磁気ヘッドスライダと磁気ディスク媒
体とを高速で接触させるために、磁気ヘッドスライダお
よび磁気ディスク媒体が摩耗損傷してしまうこと、およ
び磁気ヘッドと磁気ディスク媒体との跳躍が大きくなる
という問題点があり、磁気ディスク媒体の最表面に設け
た液体潤滑剤層の表面張力と液体潤滑剤の圧力を利用し
て、磁気ヘッドと磁気ディスク媒体との跳躍を防ぐこと
が行われていた（例えば特開平５−５４５７８号公
報）。In order to reduce the distance between the magnetic head and the magnetic disk medium, a magnetic disk device using a liquid bearing instead of an air bearing has been developed (Japanese Patent Laid-Open No. 4-113568). Furthermore, a contact type magnetic recording device in which the distance between the magnetic head and the magnetic disk medium is reduced has been developed (for example, H. Hamilton:
Journal of the Magnetic S
ociety of Japan, Vol. 15, Sup
plant No. S2 (1991) 483 and WO 93/14495 pamphlet). In the contact-type magnetic recording device, the magnetic head slider and the magnetic disk medium are brought into contact with each other at a high speed, so that the magnetic head slider and the magnetic disk medium are worn and damaged, and the jump between the magnetic head and the magnetic disk medium is increased. Therefore, the jump of the magnetic head and the magnetic disk medium is prevented by utilizing the surface tension of the liquid lubricant layer provided on the outermost surface of the magnetic disk medium and the pressure of the liquid lubricant. (For example, JP-A-5-54578).
【０００４】[0004]
【発明が解決しようとする課題】上述した従来の空気ベ
アリングや液体ベアリングを用いる磁気ディスク装置で
は磁気ヘッドと磁気ディスク媒体との間隔をゼロにする
ことはできなかった。また、接触式磁気ディスク装置で
は、磁気ヘッドと磁気ディスク媒体との跳躍を防ぐため
に、磁気ヘッドスライダの押し付け荷重を大きくしなけ
ればならず、磁気ヘッドおよび磁気ディスク媒体が摩耗
損傷してしまうことがあり、一方、摩耗損傷を防ぐには
磁気ヘッドスライダの押し付け荷重を小さくしなければ
ならないので跳躍と摩耗損傷の二つの性能を同時に満足
することができないという重大な問題点があった。ま
た、液体潤滑剤層の表面張力と液体潤滑剤の圧力を利用
する磁気ディスク装置は、潤滑剤のメニスカスによる引
力が磁気ヘッドスライダの高周波振動には追従できない
こと、潤滑剤が枯渇すること、および潤滑剤の圧力によ
る斥力が小さいことによる磁気ヘッドスライダと磁気デ
ィスク媒体との接触などが原因となって摩耗損傷が進行
し、実用装置としての信頼性が乏しいという重大な問題
点があった。In the above-described magnetic disk device using the conventional air bearing or liquid bearing, the distance between the magnetic head and the magnetic disk medium cannot be reduced to zero. Further, in the contact type magnetic disk device, in order to prevent the magnetic head and the magnetic disk medium from jumping, the pressing load of the magnetic head slider must be increased, and the magnetic head and the magnetic disk medium may be worn and damaged. On the other hand, in order to prevent abrasion damage, the pressing load of the magnetic head slider must be reduced, so that there is a serious problem that the two performances of jumping and abrasion damage cannot be satisfied at the same time. Further, in the magnetic disk device utilizing the surface tension of the liquid lubricant layer and the pressure of the liquid lubricant, the attractive force due to the meniscus of the lubricant cannot follow the high frequency vibration of the magnetic head slider, the lubricant is exhausted, and There is a serious problem that wear and damage progresses due to contact between the magnetic head slider and the magnetic disk medium due to a small repulsive force due to the pressure of the lubricant, and the reliability as a practical device is poor.
【０００５】本発明の目的は、上記問題点を解決した、
高記録密度で高信頼性の磁気ディスク装置を提供するこ
とである。The object of the present invention is to solve the above problems.
An object of the present invention is to provide a magnetic disk device having high recording density and high reliability.
【０００６】[0006]
【課題を解決するための手段】本発明は、磁気記録再生
素子からなる磁気ヘッドと、該磁気ヘッドを装着した磁
気ヘッドスライダと、該磁気ヘッドスライダを支持する
磁気ヘッドスライダ支持機構と、磁気ディスク媒体とを
少なくとも備えた磁気ディスク装置において、磁気ディ
スク媒体と磁気ヘッドスライダとの間に非線形のクーロ
ン力を作用させることを特徴とする磁気ディスク装置で
ある。また、特にクーロン力の印加方法として磁気ヘッ
ドスライダ支持機構部にクーロン力制御部を設けたこと
を特徴とする磁気ディスク装置である。SUMMARY OF THE INVENTION The present invention is directed to a magnetic head comprising a magnetic recording / reproducing element, a magnetic head slider having the magnetic head mounted thereon, a magnetic head slider support mechanism for supporting the magnetic head slider, and a magnetic disk. A magnetic disk device including at least a medium, wherein a non-linear Coulomb force is applied between the magnetic disk medium and the magnetic head slider. Further, in particular, as a method for applying the Coulomb force, the magnetic disk device is characterized in that a Coulomb force controller is provided in the magnetic head slider support mechanism.
【０００７】[0007]
【作用】磁気ディスク装置は、一般に、磁気ヘッドスラ
イダと磁気ディスク媒体との間隔を一定に保つために磁
気ヘッドスライダに引力と斥力を与え、その引力と斥力
を釣り合わせている。たとえば、空気浮上方式では磁気
ヘッドスライダのレール表面に斥力の圧力を発生させ、
磁気ヘッドスライダを磁気ディスク媒体に押し付ける引
力と釣り合わせて、いわゆる空気ベアリングを形成させ
ることにより磁気ディスク媒体上に磁気ヘッドスライダ
を非接触で浮上させている。接触型磁気ディスク装置で
は磁気ディスク媒体と磁気ヘッドスライダとの接触応力
を斥力として用いている。本発明では、斥力として磁気
ディスク媒体と磁気ヘッドスライダとの接触応力とクー
ロン力との二つの力を用いている。引力としては磁気ヘ
ッドスライダの押し付け荷重のみの一つの力、または押
し付け荷重とクーロン力との二つの力として与えてい
る。クーロン力は距離の２乗に比例する力であり、押し
付け荷重は距離に依存しない静的な力であり、接触応力
による斥力の距離依存性は３乗より高次の力である。こ
れらの力を組み合わせることによって、磁気ヘッドスラ
イダと磁気ディスク媒体が接触している場合には斥力を
大きくして引力を小さくし、その距離が大きくなると引
力を大きくすることによって、摩耗損傷をせず跳躍を防
ぐことができる。また、クーロン力は液体潤滑剤層の表
面張力や液体潤滑剤の圧力と比較して力の可変範囲を大
きくすることができ、潤滑剤のように枯渇しないことや
高周波振動にも追従することで長期信頼性を確保するこ
とができる。In general, the magnetic disk device applies an attractive force and a repulsive force to the magnetic head slider in order to keep the distance between the magnetic head slider and the magnetic disk medium constant, and balances the attractive force and the repulsive force. For example, in the air levitation method, repulsive pressure is generated on the rail surface of the magnetic head slider,
The magnetic head slider is floated on the magnetic disk medium in a non-contact manner by forming a so-called air bearing in balance with the attractive force that presses the magnetic head slider against the magnetic disk medium. In the contact type magnetic disk device, the contact stress between the magnetic disk medium and the magnetic head slider is used as the repulsive force. In the present invention, two forces, that is, the contact stress between the magnetic disk medium and the magnetic head slider and the Coulomb force are used as the repulsive force. The attractive force is given as one force of only the pressing load of the magnetic head slider or two forces of the pressing load and the Coulomb force. The Coulomb force is a force proportional to the square of the distance, the pressing load is a static force that does not depend on the distance, and the distance dependence of the repulsive force due to the contact stress is a force higher than the cube. By combining these forces, when the magnetic head slider and the magnetic disk medium are in contact with each other, the repulsive force is increased to decrease the attractive force, and when the distance is increased, the attractive force is increased to prevent abrasion damage. You can prevent jumping. In addition, the Coulomb force can increase the variable range of the force compared to the surface tension of the liquid lubricant layer and the pressure of the liquid lubricant, and by not being depleted like a lubricant and following high frequency vibrations. It is possible to secure long-term reliability.
【０００８】[0008]
【実施例】次に、本発明の実施例１について説明する。
図１は本発明の記録ディスク装置の基本構成を示す模式
図で、１１は磁気ディスク媒体、１２は導電性保護膜、
１３は磁気ヘッドスライダ支持機構、１４は磁気ヘッド
スライダ、１５はクーロン力制御部、１６は電圧印加制
御部である。[Embodiment] Next, Embodiment 1 of the present invention will be described.
FIG. 1 is a schematic diagram showing the basic configuration of a recording disk device of the present invention, 11 is a magnetic disk medium, 12 is a conductive protective film,
Reference numeral 13 is a magnetic head slider support mechanism, 14 is a magnetic head slider, 15 is a Coulomb force controller, and 16 is a voltage application controller.
【０００９】磁気ディスク媒体１１の詳細断面図を図２
に示した。基板２１はアルミ合金を用いた。下地膜２２
は、スパッタ法により形成したＣｒを用いた。磁性膜２
３は、ＣｏＮｉＣｒをスパッタ法により６０ｎｍ成膜し
た。保護膜２４はスパッタ法により水素１０％添加カー
ボンを１０ｎｍ成膜した。潤滑膜２５は、パーフルオロ
ポリエーテル系の材料を用い３ｎｍディップ法により成
膜した。なお、上記基板２１、下地膜２２、磁性膜２
３、保護膜２４および潤滑膜２５の種類、形成方法など
は特に限定されるものではなく、公知の材料、形成方法
を特別な制限なく用いることができる。FIG. 2 is a detailed sectional view of the magnetic disk medium 11.
It was shown to. The substrate 21 is made of aluminum alloy. Base film 22
Is Cr formed by sputtering. Magnetic film 2
In No. 3, CoNiCr was deposited to a thickness of 60 nm by a sputtering method. As the protective film 24, 10 nm hydrogen-added carbon was formed to a thickness of 10 nm by a sputtering method. The lubricating film 25 was formed by a 3 nm dip method using a perfluoropolyether material. The substrate 21, the base film 22, and the magnetic film 2
3, types of the protective film 24 and the lubricating film 25, forming methods, etc. are not particularly limited, and known materials and forming methods can be used without particular limitation.
【００１０】磁気ヘッドスライダ支持機構１３は、長さ
１０ｍｍ、幅０．５ｍｍ、厚さ０．０４ｍｍのステンレ
スを用いた。磁気ヘッドスライダ１４はスパッタ法によ
りダイヤモンドライクカーボンを用い、高さ１０μｍに
成膜した。磁気ヘッドスライダの材料としてはダイヤモ
ンドライクカーボンの他にも酸化物セラミックスである
ＳｉＯ2 系、Ａｌ2 Ｏ3 系あるいはＺｒＯ2 系など公知
の耐摩耗材料を用いることができる。この磁気ヘッドス
ライダ１４の片側断面に、薄膜製造技術により記録再生
素子である磁気ヘッドを構成する。クーロン力制御部１
５は、磁気ヘッドスライダ１４に隣接して形成し、スパ
ッタ法によりＡｕを磁気ヘッドスライダ１４と同じ高さ
に成膜した。電極端子をとるために磁気ヘッドスライダ
支持機構１３の下面にＡｕ電極をスパッタ法により成膜
した。電圧印加制御部１６は、電圧印加のための電源お
よび制御回路であり−１００Ｖ〜１００Ｖの範囲の電圧
を印加することができる。この電圧印加制御部１６は、
磁気ディスク媒体とクローン力制御部との間の距離およ
び磁気ディスク媒体表面うねりの関数として印加電圧を
制御している。その距離に関する値として磁気ディスク
媒体とクローン力制御部間のインピーダンスＺを用い、
磁気ディスク媒体表面うねりに関する値としてＺの時間
微分値（ｄＺ／ｄｔ）を用いた。印加電圧Ｖは、比例係
数ａとするとＶ＝ａ・Ｚ・（ｄＺ／ｄｔ）1/2で示され
るように印加した。The magnetic head slider support mechanism 13 is made of stainless steel having a length of 10 mm, a width of 0.5 mm and a thickness of 0.04 mm. The magnetic head slider 14 was formed by sputtering using diamond-like carbon to a height of 10 μm. As the material of the magnetic head slider, in addition to diamond-like carbon, known wear resistant materials such as SiO 2 type, Al 2 O 3 type or ZrO 2 type which are oxide ceramics can be used. A magnetic head, which is a read / write element, is formed on one side cross section of the magnetic head slider 14 by a thin film manufacturing technique. Coulomb force controller 1
No. 5 was formed adjacent to the magnetic head slider 14, and Au was deposited at the same height as the magnetic head slider 14 by the sputtering method. An Au electrode was formed by sputtering on the lower surface of the magnetic head slider support mechanism 13 to serve as an electrode terminal. The voltage application control unit 16 is a power supply and control circuit for voltage application, and can apply a voltage in the range of −100V to 100V. The voltage application controller 16
The applied voltage is controlled as a function of the distance between the magnetic disk medium and the cloning force controller and the surface waviness of the magnetic disk medium. The impedance Z between the magnetic disk medium and the clone force control unit is used as a value related to the distance,
The time differential value (dZ / dt) of Z was used as a value relating to the waviness of the surface of the magnetic disk medium. The applied voltage V was applied as shown by V = a · Z · (dZ / dt) 1/2, where the proportionality coefficient is a.
【００１１】上記のクーロン力制御部に電圧を印加した
時に発生するクーロン力を測定した結果を図８に示す。
印加電圧が正の場合斥力が作用し、逆に印加電圧が負の
場合引力が作用する。また、印加電圧に対して非線形に
クーロン力が変化していることがわかる。図９には、ク
ーロン力のクーロン力制御部と磁気ディスク媒体との距
離依存性の測定結果を示す。距離を小さくするとクーロ
ン力が２次関数的に増加していることがわかる。FIG. 8 shows the result of measuring the Coulomb force generated when a voltage is applied to the Coulomb force controller.
When the applied voltage is positive, the repulsive force acts, and conversely, when the applied voltage is negative, the attractive force acts. Also, it can be seen that the Coulomb force changes nonlinearly with respect to the applied voltage. FIG. 9 shows the measurement results of the distance dependence of the Coulomb force between the Coulomb force controller and the magnetic disk medium. It can be seen that the Coulomb force increases quadratically when the distance is reduced.
【００１２】上記のように作製した磁気ディスク装置を
用い、接触式磁気記録再生の実験をした。比較実験とし
てはクーロン力を用いない状態で行った。磁気ヘッドス
ライダの摩耗量の結果を図６に示す。クーロン力を用い
ない場合に相当する電圧印加０Ｖの場合と比較して、ク
ーロン力を印加すると６Ｖ程度では摩耗量が１万分の１
以下に低下している。記録再生の実験中に磁気ヘッドス
ライダと磁気ディスク媒体表面は常に接触しているわけ
ではなく、磁気ディスク媒体表面の異常突起などにより
跳躍を示す。その最大跳躍量の結果を図７に示す。最大
跳躍量もクーロン力を作用させることにより１０分の１
程度に減少している。これらの摩耗量と跳躍量を加味し
て記録再生のエラー実験では、クーロン力を用いない場
合では記録再生の実験時間３００時間でエラーの増加が
認められたのに対し、本発明による磁気ディスク装置で
は少なくとも５０００時間エラーの増加が認められなか
った。したがって、本発明の磁気ディスク装置では、従
来の磁気ディスク装置と比較して少なくとも１６倍の耐
久性が達成され、高信頼性を確保することができた。Using the magnetic disk device manufactured as described above, an experiment of contact type magnetic recording / reproducing was conducted. As a comparative experiment, it was performed without using Coulomb force. The result of the wear amount of the magnetic head slider is shown in FIG. When the Coulomb force is applied, the amount of wear is 1 / 10,000 when compared with the case where the voltage is 0V, which corresponds to the case where the Coulomb force is not used.
It has fallen below. During the recording / reproducing experiment, the magnetic head slider and the surface of the magnetic disk medium are not always in contact with each other, and jumps due to abnormal protrusions on the surface of the magnetic disk medium. The result of the maximum jump amount is shown in FIG. The maximum jump amount is 1/10 by applying Coulomb force
It is decreasing to some extent. In the error experiment of recording / reproducing in consideration of the wear amount and the jumping amount, an error increase was recognized in the experiment time of recording / reproducing 300 hours without using the Coulomb force, whereas the magnetic disk device according to the present invention. No increase in error was observed for at least 5000 hours. Therefore, in the magnetic disk device of the present invention, durability of at least 16 times was achieved as compared with the conventional magnetic disk device, and high reliability could be secured.
【００１３】次に、本発明の実施例２について説明す
る。図３は実施例２の磁気ディスク装置の基本構成を示
す模式図であり、実施例１との相違は磁気ヘッドスライ
ダにクーロン力制御部の役割を持たせた点である。磁気
ヘッドスライダ１４は導電性を持たせたカーボン材料な
どの電気伝導性物質を用いることができる。実施例２の
磁気ディスク装置を用いて実施例１と同様な記録再生エ
ラー実験を行った。実施例２の磁気ディスク装置でも少
なくとも４０００時間エラーの増加は認められなかっ
た。Next, a second embodiment of the present invention will be described. FIG. 3 is a schematic diagram showing the basic configuration of the magnetic disk device of the second embodiment. The difference from the first embodiment is that the magnetic head slider has a role of a Coulomb force controller. The magnetic head slider 14 can use an electrically conductive substance such as a carbon material having conductivity. The same recording / reproduction error experiment as in Example 1 was conducted using the magnetic disk device of Example 2. Even in the magnetic disk device of Example 2, no increase in error was observed for at least 4000 hours.
【００１４】次に、本発明の実施例３について説明す
る。図４は実施例３の磁気ディスク装置の基本構成を示
す模式図であり、実施例１との相違はクーロン力制御部
４１，４２を２箇所設けた点である。クーロン力制御部
を複数個設けることにより、磁気ヘッドスライダと磁気
ディスク媒体との間に働く斥力や引力の距離依存性を細
かく変化させることができる。クーロン力制御部４１に
６Ｖ、クーロン力制御部４２に−１Ｖの電圧を印加し、
実施例１と同様な記録再生のエラー実験を行った。実施
例３の磁気ディスク装置では少なくとも８０００時間エ
ラーの増加は認められなかった。実施例３の磁気ディス
ク装置は実施例１および実施例２の磁気ディスク装置よ
りも顕著な効果が認められた。Next, a third embodiment of the present invention will be described. FIG. 4 is a schematic diagram showing the basic configuration of the magnetic disk device of the third embodiment. The difference from the first embodiment is that the Coulomb force control units 41 and 42 are provided at two locations. By providing a plurality of Coulomb force controllers, it is possible to finely change the distance dependence of the repulsive force or attractive force acting between the magnetic head slider and the magnetic disk medium. A voltage of 6V is applied to the Coulomb force control unit 41 and a voltage of -1V is applied to the Coulomb force control unit 42,
The same recording / reproduction error experiment as in Example 1 was conducted. In the magnetic disk device of Example 3, no increase in error was observed for at least 8000 hours. The magnetic disk device of Example 3 was found to be more effective than the magnetic disk devices of Examples 1 and 2.
【００１５】次に本発明の実施例４について説明する。
図５は実施例４の磁気ディスク装置の基本構成を示す模
式図であり、実施例１との相違は導電性潤滑剤（膜）を
用いていることである。導電性潤滑剤（膜）５２を用い
る利点としては、非導電性の保護膜を用いることができ
る。保護膜５１としてＳｉＯ2 、導電性潤滑剤５２とし
てＭｏＳ2 を用いた。その他は実施例１と同様にして記
録再生エラー実験を行った。実施例４の磁気ディスク装
置では少なくとも５０００時間エラーの増加は認められ
なかった。Next, a fourth embodiment of the present invention will be described.
FIG. 5 is a schematic diagram showing the basic configuration of the magnetic disk device of Example 4, and the difference from Example 1 is that a conductive lubricant (film) is used. As an advantage of using the conductive lubricant (film) 52, a non-conductive protective film can be used. With MoS 2 as SiO 2, conducting lubricants 52 as a protective film 51. Others were the same as in Example 1, and a recording / reproduction error experiment was conducted. In the magnetic disk device of Example 4, no increase in error was observed for at least 5000 hours.
【００１６】[0016]
【発明の効果】以上本発明によれば、磁気記録再生素子
からなる磁気ヘッドと、該磁気ヘッドを装着した磁気ヘ
ッドスライダと、該磁気ヘッドスライダを支持する磁気
ヘッドスライダ支持機構と、磁気ディスク媒体とを少な
くとも備えた磁気ディスク装置において、磁気ディスク
媒体と磁気ヘッドスライダとの間に非線形のクーロン力
を作用させ、特にクーロン力の印加方法として磁気ヘッ
ドスライダ支持機構部にクーロン力制御部を設けること
によって磁気ディスク媒体と磁気ヘッドスライダの摩耗
損傷を低減し、磁気ディスク装置の耐久性および信頼性
が著しく向上するという効果が得られた。As described above, according to the present invention, a magnetic head including a magnetic recording / reproducing element, a magnetic head slider having the magnetic head mounted thereon, a magnetic head slider supporting mechanism for supporting the magnetic head slider, and a magnetic disk medium are provided. In a magnetic disk device including at least, a non-linear Coulomb force is applied between a magnetic disk medium and a magnetic head slider, and in particular, a Coulomb force controller is provided in a magnetic head slider support mechanism as a method of applying the Coulomb force. As a result, it is possible to reduce the wear and damage of the magnetic disk medium and the magnetic head slider, and to significantly improve the durability and reliability of the magnetic disk device.
【図１】本発明の実施例１の磁気ディスク装置の模式図FIG. 1 is a schematic diagram of a magnetic disk device according to a first embodiment of the present invention.
【図２】本発明の実施例１の磁気ディスク媒体の詳細断
面図FIG. 2 is a detailed cross-sectional view of the magnetic disk medium according to the first embodiment of the present invention.
【図３】本発明の実施例２の磁気ディスク装置の模式図FIG. 3 is a schematic diagram of a magnetic disk device according to a second embodiment of the present invention.
【図４】本発明の実施例３の磁気ディスク装置の模式図FIG. 4 is a schematic diagram of a magnetic disk device according to a third embodiment of the present invention.
【図５】本発明の実施例４の磁気ディスク装置の模式図FIG. 5 is a schematic diagram of a magnetic disk device according to a fourth embodiment of the present invention.
【図６】本発明の実施例１の磁気ヘッドスライダの摩耗
量と印加電圧の関係を示す図FIG. 6 is a graph showing the relationship between the amount of wear of the magnetic head slider and the applied voltage according to the first embodiment of the present invention.
【図７】本発明の実施例１の磁気ヘッドスライダの跳躍
量と印加電圧の関係を示す図FIG. 7 is a diagram showing a relationship between a jump amount and an applied voltage of the magnetic head slider according to the first embodiment of the present invention.
【図８】本発明の実施例のクーロン力制御部に電圧を印
加した時に生じるクーロン力の関係を示す図FIG. 8 is a diagram showing a relationship of Coulomb force generated when a voltage is applied to the Coulomb force control unit according to the embodiment of the present invention.
【図９】本発明の実施例のクーロン力制御部と磁気ディ
スク媒体との距離に対するクーロン力の関係を示す図FIG. 9 is a diagram showing the relationship between the Coulomb force and the distance between the Coulomb force controller and the magnetic disk medium according to the embodiment of the present invention.
１１ 磁気ディスク媒体 １２ 導電性保護膜 １３ 磁気ヘッドスライダ支持機構 １４ 磁気ヘッドスライダ １５ クーロン力制御部 １６ 電圧印加制御部 ２１ 基板 ２２ 下地膜 ２３ 磁性膜 ２４ 保護膜 ２５ 潤滑膜 ４１ クーロン力制御部１ ４２ クーロン力制御部２ ５１ 非導電性保護膜 ５２ 導電性潤滑剤（膜） 11 magnetic disk medium 12 conductive protective film 13 magnetic head slider support mechanism 14 magnetic head slider 15 Coulomb force control unit 16 voltage application control unit 21 substrate 22 underlayer film 23 magnetic film 24 protective film 25 lubricating film 41 coulomb force control unit 1 42 Coulomb force controller 2 51 Non-conductive protective film 52 Conductive lubricant (film)
Claims (4)
と、該磁気ヘッドを装着した磁気ヘッドスライダと、該
磁気ヘッドスライダを支持する磁気ヘッドスライダ支持
機構と、磁気ディスク媒体とを少なくとも備えた磁気デ
ィスク装置において、 前記磁気ディスク媒体と前記磁気ヘッドスライダとの間
に非線形のクーロン力を作用させるクーロン力制御部を
具備することを特徴とする磁気ディスク装置。1. A magnetic disk comprising at least a magnetic head comprising a magnetic recording / reproducing element, a magnetic head slider having the magnetic head mounted thereon, a magnetic head slider support mechanism for supporting the magnetic head slider, and a magnetic disk medium. The magnetic disk device according to claim 1, further comprising a Coulomb force controller that applies a non-linear Coulomb force between the magnetic disk medium and the magnetic head slider.
ヘッドスライダ支持機構部に設けたことを特徴とする磁
気ディスク装置。2. A magnetic disk device, wherein the Coulomb force controller according to claim 1 is provided in a magnetic head slider support mechanism.
特徴とする請求項２記載の磁気ディスク装置。3. The magnetic disk drive according to claim 2, wherein a plurality of Coulomb force control units are provided.
滑膜を成膜したことを特徴とする請求項１ないし３記載
の磁気ディスク装置。4. The magnetic disk device according to claim 1, wherein a conductive lubricating film is formed on the surface of the magnetic disk medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20047494A JPH0863922A (en) | 1994-08-25 | 1994-08-25 | Magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP20047494A JPH0863922A (en) | 1994-08-25 | 1994-08-25 | Magnetic disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0863922A true JPH0863922A (en) | 1996-03-08 |
Family
ID=16424924
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP20047494A Pending JPH0863922A (en) | 1994-08-25 | 1994-08-25 | Magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0863922A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005736A (en) * | 1997-10-21 | 1999-12-21 | International Business Machines Corporation | Method and means for active shock protection in a magnetic disk storage device using electrostatic forces |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5278415A (en) * | 1975-12-25 | 1977-07-01 | Nec Corp | Floating head device |
| JPS61113117A (en) * | 1984-11-06 | 1986-05-31 | Nippon Telegr & Teleph Corp <Ntt> | Floating type magnetic head |
| JPS61202384A (en) * | 1985-03-05 | 1986-09-08 | Fujitsu Ltd | Magnetic disk device |
| JPH03105776A (en) * | 1989-09-20 | 1991-05-02 | Hitachi Ltd | Magnetic disk device |
-
1994
- 1994-08-25 JP JP20047494A patent/JPH0863922A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5278415A (en) * | 1975-12-25 | 1977-07-01 | Nec Corp | Floating head device |
| JPS61113117A (en) * | 1984-11-06 | 1986-05-31 | Nippon Telegr & Teleph Corp <Ntt> | Floating type magnetic head |
| JPS61202384A (en) * | 1985-03-05 | 1986-09-08 | Fujitsu Ltd | Magnetic disk device |
| JPH03105776A (en) * | 1989-09-20 | 1991-05-02 | Hitachi Ltd | Magnetic disk device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6005736A (en) * | 1997-10-21 | 1999-12-21 | International Business Machines Corporation | Method and means for active shock protection in a magnetic disk storage device using electrostatic forces |
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