JPH03105776A - Magnetic disk device - Google Patents
Magnetic disk deviceInfo
- Publication number
- JPH03105776A JPH03105776A JP24196589A JP24196589A JPH03105776A JP H03105776 A JPH03105776 A JP H03105776A JP 24196589 A JP24196589 A JP 24196589A JP 24196589 A JP24196589 A JP 24196589A JP H03105776 A JPH03105776 A JP H03105776A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- disk
- head
- magnetic head
- magnetic disk
- 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
- 230000001681 protective effect Effects 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 abstract description 7
- 238000007667 floating Methods 0.000 abstract description 3
- 238000001179 sorption measurement Methods 0.000 abstract description 3
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 239000000463 material Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 239000003989 dielectric material Substances 0.000 description 3
- 208000010727 head pressing Diseases 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 239000004020 conductor Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
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
- G11B5/54—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 into or out of its operative position or across tracks
-
- 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
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、一般に磁気記録装置、より具体的には磁気デ
ィスク装置における、磁気ディスクと磁気ヘッドとの間
に電圧を印荷する機構をもつ磁気ディスク装置に関する
。[Detailed Description of the Invention] [Industrial Application Field] The present invention generally relates to a magnetic recording device, more specifically a magnetic disk device, which has a mechanism for applying a voltage between a magnetic disk and a magnetic head. Related to magnetic disk devices.
従来の磁気ディスク装置では、Ｎ Ｔ Ｔ研究実州化報
告３６，（１９８７），４７］−に記載のように磁気デ
ィスクをドライブモータにより回転させ，そのディスク
上を支持ばねにより磁気ディスクにある荷重で押しつけ
られた磁気ヘッドが流体潤滑膜を介して浮上しており、
その状態で磁気記録、再生を行なうものであった．
又、磁気ヘッドが磁気ディスクと接触した状態で磁気記
録、再生を行なうものとしては特開昭６３−２７５０１
７号公報に記載のように、高熱伝導率、低摩擦係数及び
高表面エネルギーを有する単結晶材料からなる基板もし
くは磁気ヘッドスライダーを有する磁気ディスク装置で
あって磁気ディスクと磁気ヘッドを相対運動させること
により引力を発生させる機構を備えている磁気ディスク
装置が考えられている．
又、磁気ディスクと磁気ヘッドとの間に電圧を印加する
ことに類似するものとしては，特開昭６１ − １ ５
６ ５ ２ ５号公報記載のように、磁低ディスクと
バニッシュヘッドに交流電圧を印加し、ディスク表面の
徴小突起を除去する方法が考えられている．
〔発明が解決しようとする課題〕
上記従来技術は、磁気ディスクと磁気ヘッドとの浮上量
の狭小化に伴いＣＳＳ （コンタクトスタートストップ
）時や，ディスク表面の突起との接触時に（１）ディス
ク表面が摩耗し、ヘッドクラッシュを起こす（２）ディ
スク表面の摩耗を抑制するために塗布してある潤滑剤に
より吸着がおこり、装置の起動不能又はヘッドクラッシ
ュなどが起こる．
このようなヘッドクラッシュを防止するために、磁気ヘ
ッドの荷重を軽くすると，磁気ヘッドがディスク上で浮
上している時にその浮上量の変動が大きく満足に記録、
再生が行えないということがある．また、特開昭６３−
２７５０１７号記載の接触型の磁気記録装置においても
同様に起こると考えられ，又ヘッドとディスクの間の引
力を制御することがむつかしいという欠点がある．本発
明は、このような，磁気ヘッドの浮上量の狭小化に伴な
い発生しやすくなるディスク表面の摩耗や磁気ディスク
と磁気ヘッドとの吸着現象のない、磁気ディスク装置を
提供することを目的としている．
〔課題を解決するための手段〕
上記目的を達或するために磁気ディスクと磁気ヘッドに
電圧を印加することにより電気的引力を発生させる機構
をもつ磁気ディスク装置としたものである．
又、ＣＳＳ時すなわち磁気ヘッドが磁気ディスクと摺動
している場合や、定常回転時において，磁気ヘッドと磁
気ディスクとの間に印加する電圧を変化させることが可
能となるような機構をもつ磁気ディスク装置としたもの
である．
さらに、磁気ヘッドと磁気ディスク間に印加する電圧と
、磁気ヘッドの支持系によるディスクへの押しつつ荷重
を適当に取ることによりディスクが定常回転中において
も磁気ヘッドが接触したままで磁気記録、再生が行なえ
る機構をもつ磁気ディスク装置としたものである．
また，磁気ディスクと磁気ヘッドとの間に電圧を印加す
る場合，効率的な磁気ヘッドの浮上量制御のため，磁気
ヘッド材又は磁気ディスク保護膜に導電体又は誘電体を
用いる又は混合したものを用いたものである．
〔作用〕
磁気ディスクと磁気ヘッドとの間に印加した電圧により
電気的引力を磁気ヘッドは受ける．それにより磁気ヘッ
ドは見かけ上押しつけ荷重が大きくなった場合と同様に
ヘッドの浮上量変動が小さくなり安定した浮上状態とな
り記録、再生が安定する．又、ディスクの回転数に応じ
て磁気ディスクと磁気ヘッド間に印加する電圧を変化さ
せることにより、例えばＣＳＳ時、すなわちヘッドとデ
ィスクの摺動時には、印加電圧をＯとしておき、ディス
クが定常回転になった時点で電圧を印加し電気的引力を
発生させる．このような方法だと磁気ヘッドの押しつけ
荷重を小さくしておくことで（ａＳＳ時における）磁気
ディスク表面の摩耗を小さくすることができ、又、摩耗
による表面平滑化により引き起こされる吸着を防止する
ことができる．
また、ヘッドとディスクが接触したままで記録再生を行
なう磁気ディスク装置では，第３ｗＩに示したようにヘ
ッドを支持バネによって押しつけ圧１０ｇｆで押しつけ
たものとくらべ、電気的引力がヘソドスライダ面全体に
渡り作用するため摺動時の振動が少なく相対的な摩耗量
は小さくなる．又，上述したように印加電圧を低周速側
で小さくすることでさらに摩耗量を減少させることが可
能である．
このように磁気ディスクと磁気ヘッドの間に、電圧を印
加する方法を取った時，ディスク又はヘッド材に導電体
又は誘電体を用いる、又は混合することで印加電圧に対
して磁気ディスクと磁気ヘッド間に働く電気的引力をよ
り大きくとることができ，又、ヘッドスライダ面、ディ
スク面に，上記Ｍｆｌ体、導電体を効化的（例えば全面
に均一に分布する）に配置することにより磁気ヘッドの
振動を小さくすることが可能となる．
〔実施例〕
以ｆ，本発明の一実施例を第１図より順次説明する．
第１図に示すように少なくとも１個の磁気ディスク１が
スピンドル２に指示されておりドライブモータ９により
回転される．そして，少なくとも１個の磁気へッドスラ
イダ３が支持バネ４及びアクチュエータアーム５により
支持されており、このアクチュエータ５は、例えばボイ
スコイルモータ（ＶＣＭ）７などのアクセス機構に取り
つけられている．ドライブモータ９、ボイスコイルモー
タ７は制御装！！８により制御される。以上の磁気ディ
スク装置は，代表的なものとして示したものである．磁
気ディスク１は、Ａ１合金基板上にＮｉ−Ｐめっき膜を
形成しそれを鏡面仕上げした後に約１０ｎｍＲａの面粗
さになるよう機械加工をほどこした。さらにそのＮ ｉ
− Ｐめっき膜上にＣＯ系磁性膜、Ｃ保護膜をスバッ
タ法により形成した．ＣＯＡＳ膜上にフッ素系潤滑剤を
数ｎｍの厚さで浸漬法により塗布したものを用いた．磁
気ヘッド３はスライダ材がＡ １，０，Ｔ ｉ ｃ （
ＡＣ ２）よりなるものを用いた．上記に述べた磁気デ
ィスク，磁気ヘッドは，代表例であり、例えばスバッタ
法のかわりにめっき法などで膜を形威してもがまゎない
．
本発明によれば第１図に示すようにスピンドル２とアク
チュエータアーム５に印加電圧制御装置６により電圧を
加えることにより最終的に磁気ディスク１と磁気ヘッド
３に電圧を印加する機構をもつ．磁気ディスク１と磁気
ヘッド３に電圧を印加することにより発生する電気的引
カは、第２図の様であった．電気的引力は、電圧を印加
した状態で磁気ヘッド３を鉛直上方に引き上げた場合の
力をテンションゲージにより測定した．この電気的引力
の発生は，磁気ディスク１のＣ保Ｓ膜が導電性をもち，
かつ磁気ヘッド３の材質が誘電体であるＡｔ，０３を含
み、導電性をもっＴｉｃを含んでいるためと考えられる
．
次に実施例１で示した磁気ディスク装置を用い磁気ディ
スク１と磁気ヘッド３の間に３■の電圧を印加した状態
で一定周速で円板を回転させた時？、円板の摩耗量を調
査した．この時，磁気ヘッドは浮上せず磁気ディスク上
を摺動していることをヘッド上のビエゾ、素子出力によ
り確認している．結果を第２図に示す．実線で示したも
のは、ヘッドの押しつけ荀重をＬｏｇとし、印加電圧Ｏ
■の場合であり、破線はヘッド押しつけ荷重２ｇ，印荷
電圧３■の場合である．ヘッドとディスクとの間にかか
る力は、相方の場合ともＬｏｇとなっている。この場合
，破線で示したヘッドとディスクとの間に電圧を印加し
た方が摩耗量が少なくなった．これは、ヘッドのスライ
ダ面に均一に電気的引力が加わるために、ヘッドがディ
スク上を■動している時にヘッドがスティック・スリッ
プのような挙動をしない理由による．
次に現在磁気ディスク装置で一般的に行なわれているＣ
ＳＳを繰り返す試験を次のように行なった．概略を第４
図に示す．まずヘッドの押しつけ荷重１０ｇｆで印加電
圧ＯＶとし，次に押し付け萄重３ｇｆで印荷電圧をディ
スクの回転数に伴い図の様に変化させた．印加電圧は、
ディスクが定常回転になった時ヘッドの浮上量が図の様
に等しくなる様にした．第４図には、１サイクル中のヘ
ッドの浮上量をあわせて示す．ディスク、ヘッドは，第
３図の摺動試験に用いたものと同じものである．このよ
うなサイクルを２つの場合について各３万回繰り返しデ
ィスクの摩耗をＳＥＭ （走査型電子顕微鏡）により調
べると明らかに押しつけ荷重１０ｇｆのものが摩耗が多
かった、また第５図に示すごとく、ＣＳＳ回数に伴う，
＊擦力の変化も小さい．このことにより，ヘッドの押し
つけ荷重を小さくし、ヘッドとディスクに電圧を印加し
浮上量を制御する方が，ディスクの信頼性を高めること
が判る．
次に連続接触型の磁気ディスク装置の一実施例を述べる
．本実施例では，磁気ヘッドとして第６図に示した形状
を持つものを用いた．１０はスライダ面であり，ディス
ク回転方向１１、読み書きヘッド素子部１２をそれぞれ
示す．スライダ面１０の幅を変化させてあるのは、空気
によるよう力を打ち消すためである．このような磁気ヘ
ッドを用い押しつけ荷重２ｇｆ、印加電圧３■として、
第３図の摺動試験で用いたスバッタディスク上を３６０
Ｏｒｐｍにより接触させたまま回転させ磁気ディスクと
磁気ヘッドの損傷を調査したが、損傷は見られなかった
．今回の実施例では、磁気ディスクの保護膜がカーボン
で磁気ヘッドのスライダ材はＡ １．０ａＴ ｉ Ｃで
あったが、他の適当な耐摩耗性、導電性，誘電率を有す
るものでもよく，例えば、Ｚ ｒ Ｏ．ｔ ＷＣｔ Ｔ
ｉ Ｎ， Ａ １，Ｏａなどがある．
又，磁気ヘッドのスライダ面が複合材料でできている時
上記の様な材料を均一に分散させることによりヘッドの
制御性、耐摩耗性を上げることが可能である．
又、実施例に示した磁気ディスクと磁気ヘッドとの間に
印加する電圧は磁気ディスクの保護膜、磁気ヘッドのス
ライダ材の材質により適当に決定すれば良い．
〔発明の効果〕
本発明によれば、磁気ディスク，磁気ヘッドの摩耗が少
なく、又、吸着現象をおこさない信頼性の高い磁気ディ
スク装置を得ることができる．In conventional magnetic disk drives, the magnetic disk is rotated by a drive motor, and the load on the magnetic disk is transferred onto the disk by a support spring, as described in NTT Research Report 36, (1987), 47]. The magnetic head, which is pressed against the
In this state, magnetic recording and playback were performed. Furthermore, for a device that performs magnetic recording and reproduction with a magnetic head in contact with a magnetic disk, Japanese Patent Application Laid-Open No. 63-27501 discloses
As described in Publication No. 7, a magnetic disk device having a substrate or a magnetic head slider made of a single crystal material having high thermal conductivity, low coefficient of friction, and high surface energy, in which a magnetic disk and a magnetic head are caused to move relative to each other. A magnetic disk device equipped with a mechanism that generates gravitational force is being considered. Also, as a method similar to applying a voltage between a magnetic disk and a magnetic head, Japanese Patent Application Laid-Open No. 1983-15
As described in Japanese Patent No. 6,525, a method has been proposed in which alternating current voltage is applied to a magnetic low disk and a burnish head to remove small protrusions on the disk surface. [Problem to be Solved by the Invention] The above-mentioned conventional technology has been developed due to the narrowing of the flying height between the magnetic disk and the magnetic head. (2) The lubricant applied to the disk surface to suppress wear causes adsorption, causing the device to be unable to start or a head crash. In order to prevent such head crashes, by reducing the load on the magnetic head, when the magnetic head is flying above the disk, the fluctuation in the flying height will be large and it will be possible to record data satisfactorily.
Sometimes playback cannot be performed. Also, JP-A-63-
It is thought that the same problem occurs in the contact-type magnetic recording device described in No. 275017, which also has the disadvantage that it is difficult to control the attractive force between the head and the disk. An object of the present invention is to provide a magnetic disk device that is free from wear on the disk surface and the phenomenon of attraction between the magnetic disk and the magnetic head, which tend to occur as the flying height of the magnetic head becomes narrower. There is. [Means for Solving the Problems] In order to achieve the above object, a magnetic disk device is provided that has a mechanism that generates electrical attraction by applying voltage to a magnetic disk and a magnetic head. In addition, a magnetic disk that has a mechanism that makes it possible to change the voltage applied between the magnetic head and the magnetic disk during CSS, that is, when the magnetic head is sliding against the magnetic disk, or during steady rotation. This is a disk device. Furthermore, by applying a voltage between the magnetic head and the magnetic disk and applying an appropriate load while pushing the disk against the magnetic head support system, the magnetic head remains in contact with the disk even during steady rotation, allowing magnetic recording and playback. This is a magnetic disk device with a mechanism that allows this. In addition, when applying a voltage between a magnetic disk and a magnetic head, in order to efficiently control the flying height of the magnetic head, conductors or dielectrics may be used or mixed in the magnetic head material or magnetic disk protective film. This is what I used. [Operation] The magnetic head receives electrical attraction from the voltage applied between the magnetic disk and the magnetic head. As a result, the fluctuation of the flying height of the magnetic head is reduced, which is the same as when the apparent pressing load becomes large, resulting in a stable flying state and stable recording and reproduction. In addition, by changing the voltage applied between the magnetic disk and the magnetic head according to the rotational speed of the disk, for example, during CSS, that is, when the head and disk are sliding, the applied voltage is set to O, and the disk is kept in steady rotation. When this happens, voltage is applied to generate electrical attraction. With this method, by keeping the pressing load of the magnetic head small, it is possible to reduce wear on the magnetic disk surface (during aSS), and also to prevent adhesion caused by surface smoothing caused by wear. Can be done. In addition, in a magnetic disk device that performs recording and reproduction while the head and disk are in contact with each other, compared to the case where the head is pressed by a support spring with a pressure of 10gf as shown in 3rd wI, the electrical attraction force is spread over the entire heel slider surface. Because of this, there is less vibration during sliding and the relative amount of wear is smaller. Furthermore, as mentioned above, it is possible to further reduce the amount of wear by reducing the applied voltage on the low circumferential speed side. When applying a voltage between the magnetic disk and the magnetic head in this way, by using or mixing a conductor or dielectric material in the disk or head material, the magnetic disk and the magnetic head can be adjusted in response to the applied voltage. The magnetic head It is possible to reduce the vibration of [Embodiment] Hereinafter, one embodiment of the present invention will be explained sequentially starting from Fig. 1. As shown in FIG. 1, at least one magnetic disk 1 is directed to a spindle 2 and rotated by a drive motor 9. At least one magnetic head slider 3 is supported by a support spring 4 and an actuator arm 5, and the actuator 5 is attached to an access mechanism such as a voice coil motor (VCM) 7, for example. The drive motor 9 and voice coil motor 7 are control devices! ! 8. The above magnetic disk devices are shown as representative ones. The magnetic disk 1 was prepared by forming a Ni--P plating film on an A1 alloy substrate, mirror-finishing it, and then machining it to a surface roughness of about 10 nmRa. Furthermore, that N i
- A CO-based magnetic film and a C protective film were formed on the P plating film by a sputtering method. A COAS film was coated with a fluorine-based lubricant to a thickness of several nanometers using a dipping method. The magnetic head 3 has a slider material of A 1,0, T ic (
AC 2) was used. The above-mentioned magnetic disks and magnetic heads are typical examples, and the film may be formed using a plating method instead of the sputtering method. According to the present invention, as shown in FIG. 1, there is a mechanism for applying voltage to the spindle 2 and actuator arm 5 by an applied voltage control device 6, thereby finally applying voltage to the magnetic disk 1 and the magnetic head 3. The electrical force generated by applying voltage to the magnetic disk 1 and the magnetic head 3 was as shown in Figure 2. The electrical attractive force was measured by using a tension gauge as the force when the magnetic head 3 was pulled vertically upward while a voltage was applied. The generation of this electrical attraction is due to the fact that the C/S film of the magnetic disk 1 is conductive.
This is thought to be because the material of the magnetic head 3 contains At, 03, which is a dielectric material, and contains Tic, which is electrically conductive. Next, when using the magnetic disk device shown in Example 1 and rotating the disk at a constant circumferential speed while applying a voltage of 3cm between the magnetic disk 1 and the magnetic head 3? , the amount of wear on the disc was investigated. At this time, it was confirmed by the viezo and element outputs on the head that the magnetic head was not floating but was sliding on the magnetic disk. The results are shown in Figure 2. The solid line indicates the pressing force of the head as Log, and the applied voltage O.
This is the case (2), and the broken line is the case where the head pressing load is 2 g and the applied voltage is 3 (2). The force applied between the head and the disk is Log in both cases. In this case, the amount of wear was reduced by applying voltage between the head and the disk, as shown by the broken line. This is because the electric attraction force is uniformly applied to the slider surface of the head, which prevents the head from exhibiting stick-slip behavior when it moves over the disk. Next, C
A test of repeated SS was conducted as follows. 4th outline
It is shown in the figure. First, the applied voltage was set to OV with a head pressing load of 10 gf, and then with a pressing force of 3 gf, the applied voltage was varied as shown in the figure according to the rotational speed of the disk. The applied voltage is
When the disk rotates steadily, the flying height of the head is made equal as shown in the figure. Figure 4 also shows the flying height of the head during one cycle. The disk and head are the same as those used in the sliding test shown in Figure 3. When this cycle was repeated 30,000 times in each case and the wear of the disk was examined using an SEM (scanning electron microscope), it was clear that the one with a pressing load of 10 gf had the most wear, and as shown in Figure 5, the CSS With the number of times,
*Changes in friction force are also small. This shows that reducing the head pressing load and controlling the flying height by applying voltage to the head and disk increases the reliability of the disk. Next, an example of a continuous contact type magnetic disk device will be described. In this example, a magnetic head having the shape shown in Figure 6 was used. Reference numeral 10 denotes a slider surface, indicating a disk rotation direction 11 and a read/write head element section 12, respectively. The reason why the width of the slider surface 10 is changed is to cancel the force caused by air. Using such a magnetic head, with a pressing load of 2gf and an applied voltage of 3■,
360 degrees on the spatter disk used in the sliding test shown in Figure 3.
We examined the magnetic disk and magnetic head for damage by rotating them while keeping them in contact with the Orpm, but no damage was found. In this example, the protective film of the magnetic disk was carbon and the slider material of the magnetic head was A1.0aT i C, but other materials having appropriate wear resistance, conductivity, and dielectric constant may be used. For example, Z r O. t WCt T
There are iN, A1, Oa, etc. Furthermore, when the slider surface of the magnetic head is made of a composite material, it is possible to improve the controllability and wear resistance of the head by uniformly dispersing the above materials. Further, the voltage applied between the magnetic disk and the magnetic head shown in the embodiment may be appropriately determined depending on the protective film of the magnetic disk and the material of the slider material of the magnetic head. [Effects of the Invention] According to the present invention, it is possible to obtain a highly reliable magnetic disk device in which the magnetic disk and magnetic head have little wear and do not cause adhesion phenomena.
第１ｒｊ４は、本発明を具体化した磁気ディスク装置の
概Ｉ＠図、第２図は，印加電圧とそれに伴うディスクと
ヘッド間の電気的引力を示した図、第３−はディスクと
ヘッド間に電圧を印加した場合の耐摩耗性の向上を示す
図、第４図はＣＳＳ試験の条件を概略的に示す図、第５
図はＣＳＳ試験の結果．ＣＳＳ回数と摩擦力の増加を示
す図、第６図は，連続接触型の磁気ディスク装置にもち
いた磁気ヘッドの形状を示した概略図である。
１・・・磁気ディスク，２・・・スピンドル，３・・・
磁気ヘッド，４・・・支持バネ，５・・・アクチュエー
タアーム，６・・・印加電圧制御部，７・・・ボイスコ
イルモータ，８・・・制御装置．９・・・ドライブモー
タ，１０・・・ヘッドスライダ面，１１・・・ディスク
回転方向，１２・・・読み書きヘッド素子部．
島 １ 図
第 ４ 図
川 徨 （栖／０
？ｓｓｈワ■◆ｉズ．（ｌｆｔ２No. 1rj4 is a schematic I@ diagram of a magnetic disk device embodying the present invention, FIG. 2 is a diagram showing the applied voltage and the resulting electric attraction between the disk and the head, and No. 3- is a diagram showing the electric attraction between the disk and the head. Figure 4 is a diagram schematically showing the conditions of the CSS test, Figure 5 is a diagram showing the improvement in wear resistance when a voltage is applied to
The figure shows the results of the CSS test. FIG. 6, which shows the increase in CSS frequency and frictional force, is a schematic diagram showing the shape of a magnetic head used in a continuous contact type magnetic disk drive. 1...Magnetic disk, 2...Spindle, 3...
Magnetic head, 4... Support spring, 5... Actuator arm, 6... Applied voltage control section, 7... Voice coil motor, 8... Control device. 9... Drive motor, 10... Head slider surface, 11... Disk rotation direction, 12... Read/write head element section. Island 1 Figure 4 Tsugawa Tsuyoshi (栖／0 ?sshwa■◆is.(lft2
Claims (1)
前記磁気記録媒体に対して磁気記録をおこなう磁気ヘッ
ドと磁気記録媒体を回転させるドライブモータからなる
磁気ディスク装置において、磁気ディスクと磁気ヘッド
に電圧を印加することにより電気的引力を磁気ディスク
と磁気ヘッドとの間に発生させる機構を有する磁気ディ
スク装置。1. A magnetic recording medium having a magnetic film and a protective film on a substrate;
In a magnetic disk device consisting of a magnetic head that performs magnetic recording on the magnetic recording medium and a drive motor that rotates the magnetic recording medium, electric attraction is applied between the magnetic disk and the magnetic head by applying a voltage to the magnetic disk and the magnetic head. A magnetic disk device that has a mechanism that generates data between
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24196589A JPH03105776A (en) | 1989-09-20 | 1989-09-20 | Magnetic disk device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24196589A JPH03105776A (en) | 1989-09-20 | 1989-09-20 | Magnetic disk device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03105776A true JPH03105776A (en) | 1991-05-02 |
Family
ID=17082214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24196589A Pending JPH03105776A (en) | 1989-09-20 | 1989-09-20 | Magnetic disk device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03105776A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0863922A (en) * | 1994-08-25 | 1996-03-08 | Nec Corp | Magnetic disk device |
| 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 |
| KR20040019711A (en) * | 2002-08-29 | 2004-03-06 | 발레오만도전장시스템스코리아 주식회사 | Check valve structure for vacuum pump of alternator |
| KR20040027202A (en) * | 2002-09-27 | 2004-04-01 | 발레오만도전장시스템스코리아 주식회사 | Check valve structure for vacuum pump of alternator |
-
1989
- 1989-09-20 JP JP24196589A patent/JPH03105776A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0863922A (en) * | 1994-08-25 | 1996-03-08 | Nec Corp | Magnetic disk device |
| 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 |
| KR20040019711A (en) * | 2002-08-29 | 2004-03-06 | 발레오만도전장시스템스코리아 주식회사 | Check valve structure for vacuum pump of alternator |
| KR20040027202A (en) * | 2002-09-27 | 2004-04-01 | 발레오만도전장시스템스코리아 주식회사 | Check valve structure for vacuum pump of alternator |
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