JP2613213B2 - Magnetic head slider - Google Patents
Magnetic head sliderInfo
- Publication number
- JP2613213B2 JP2613213B2 JP62131137A JP13113787A JP2613213B2 JP 2613213 B2 JP2613213 B2 JP 2613213B2 JP 62131137 A JP62131137 A JP 62131137A JP 13113787 A JP13113787 A JP 13113787A JP 2613213 B2 JP2613213 B2 JP 2613213B2
- Authority
- JP
- Japan
- Prior art keywords
- slider
- contact
- magnetic head
- head slider
- rigidity
- 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.)
- Expired - Lifetime
Links
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は磁気デイスク装置の磁気ヘツドスライダに係
り、特にヘツドクラツシユの防止に効果的な低接触力ス
ライダに関する。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head slider for a magnetic disk device, and more particularly to a low contact force slider effective for preventing head crash.
磁気デイスク装置のヘツドクラツシユ防止のための設
計指針として、接触回避と接触時のダメージ軽減の２つ
がある。接触回避はデイスク表面の平坦性や外乱の軽
減，スライダの浮上安定性の確保等により達成される。
とりわけスライダの浮上安定性は、スライダ浮上面に発
生する空気膜剛性を、あるレベル以上に保つことが一つ
のポイントになり、スライダのレール幅や押しつけ荷重
等の設計が行なわれる。一方、接触時のダメージ軽減は
スライダ及びデイスク表面の強度、潤滑性を接触時の力
に十分耐えるように高めることと、スライダ浮上面の面
圧を下げて接触時の力そのもを小さくするために押しつ
け荷重を小さくすること等により達成される。以上のよ
うな意味からすると、過去の磁気デイスク装置において
300g以上の押しつけ荷重を加えていた、いわゆる重荷重
スライダから近年の10g程度の、いわゆるウインチエス
タタイプのスライダ（特開昭49−121514）へ移行したこ
とは大きな変革であつた。以後は部分的は改良はあるも
のの、基本的にはこのタイプの延長上にある。また、薄
膜素子を搭載したタイプのスライダではスライダ材料を
磁気特性と切り離して選べるため、摩擦摩耗特性の良い
材料を選べる自由度が広がり、スライダ／デイスクの耐
力向上につながつている。There are two design guidelines for preventing the head crash of the magnetic disk device: contact avoidance and contact damage reduction. Avoidance of contact is achieved by reducing the flatness of the disk surface, reducing disturbance, and ensuring the flying stability of the slider.
In particular, with respect to the flying stability of the slider, one point is to maintain the air film rigidity generated on the slider flying surface at a certain level or more, and the slider width and the pressing load are designed. On the other hand, in order to reduce the damage at the time of contact, the strength and lubricity of the slider and the disk surface are increased so as to sufficiently withstand the force at the time of contact, and the surface pressure of the slider flying surface is reduced to reduce the force at the time of contact. This can be achieved by reducing the load applied to the substrate. In the light of the above, in the past magnetic disk devices
The shift from a so-called heavy load slider, which applied a pressing load of 300 g or more, to a so-called winch-esta type slider of about 10 g in recent years (JP-A-49-121514) was a major change. Thereafter, although there are some improvements, it is basically an extension of this type. Further, in a slider of a type in which a thin film element is mounted, since the slider material can be selected separately from the magnetic characteristics, the degree of freedom in selecting a material having good friction and wear characteristics is increased, which leads to an improvement in the slider / disk proof strength.
ヘツドクラツシユ防止技術は以上のようないくつかの
観点から進められているが、その中に根本的に相反する
方向が混在することがわかる。即ち浮上安定性を向上さ
せるため空気膜剛性を大きくすることは、デイスク上の
突起やスライダ／デイスク間への侵入塵埃にスライダが
接触した時の衝撃力を大きくしてしまうことである。こ
れは接触時のダメージを軽減する上では不利である。し
かし記録密度向上のためスライダの浮上量を小さくする
ことは必至であり、浮上安定性確保は増々重要な課題と
なつており、空気膜剛性をある程度以上にしてやらなけ
ればならない。一方磁気デイスク媒体にはより良い磁気
特性及びスライダの浮上しやすさが要求されるため、む
やみに強度向上ばかりを求めるわけにはいかない。従つ
て接触が発生した時の衝撃力を極力小さくすることが今
後増々重要な課題となる。Although the head crash prevention technology has been advanced from the above several viewpoints, it can be seen that fundamentally opposite directions are mixed in the technology. That is, increasing the rigidity of the air film in order to improve the flying stability increases the impact force when the slider comes into contact with protrusions on the disk or dust entering between the slider and the disk. This is disadvantageous in reducing contact damage. However, it is inevitable to reduce the flying height of the slider in order to improve the recording density, and securing flying stability is becoming an increasingly important issue, and the rigidity of the air film must be increased to some extent. On the other hand, a magnetic disk medium is required to have better magnetic characteristics and the slider is easy to fly. Therefore, it is increasingly important in the future to minimize the impact force when contact occurs.
本発明の目的は、浮上安定性と、接触時の衝撃力軽減
を同時に満足する新しい視点からの解決方法を与えるこ
とにある。An object of the present invention is to provide a solution from a new viewpoint that simultaneously satisfies the flying stability and the reduction of the impact force upon contact.
上記目的は、スライダのレール部を摩擦摩耗特性の良
い材料で形成し、スライダ本体部をレール部よりヤング
率の小さい材料で形成することにより達成される。また
同じくスライダ本体部を繊維強化形複合材料とすること
によつても達成される。The above object is achieved by forming the rail portion of the slider from a material having good friction and wear characteristics, and forming the slider body portion from a material having a smaller Young's modulus than the rail portion. It is also achieved by forming the slider body from a fiber-reinforced composite material.
スライダはデイスク表面の突起や、スライダ／デイス
ク間介在物に接触すると、空気膜剛性の大きさに応じて
衝突力によりはね上げられ、浮上量変動を生じる。言い
かえれば浮上量変動を生ずることにより衝突エネルギを
吸収するわけである。しかしこれだけではなく、衝突力
によりスライダ自身が弾性変形し、スライダの固有振動
数で変形振動することが実験的に明らかとなつた。即ち
スライダは接触直後、それ自身が弾性変形振動すること
によつても衝突力を吸収する。しかもこれにより吸収す
る比率は、浮上量変動によるものに比べて同等かそれ以
上であることがわかつた。これは空気膜剛性がスライダ
の曲げ剛性に比べ無視できない程大きいためである。When the slider comes into contact with a projection on the disk surface or an intervening member between the slider and the disk, the slider is jumped up by an impact force depending on the rigidity of the air film, and a flying height varies. In other words, the collision energy is absorbed by causing the fluctuation of the flying height. However, not only this, it was experimentally revealed that the slider itself elastically deforms due to the collision force and deforms and vibrates at the natural frequency of the slider. That is, the slider absorbs the collision force by virtue of its own elastic deformation and vibration immediately after the contact. In addition, it was found that the ratio of absorption by this was equal to or higher than that by the fluctuation of the flying height. This is because the rigidity of the air film is not negligible compared to the bending rigidity of the slider.
従つてスライダ本体を比較的曲げ剛性の小さい材料で
構成すると、スライダの曲げ変形振動により吸収される
衝突力が大きくなり、衝突によるダメージを減らすこと
ができる。ただし一般に剛性の小さい材料は硬さも小さ
く耐摩耗性に劣るので、スライダレール部は耐摩耗性に
勝る材料で形成する必要があるわけである。Therefore, when the slider body is made of a material having relatively low bending rigidity, the collision force absorbed by the bending deformation vibration of the slider increases, and the damage due to the collision can be reduced. However, since a material having low rigidity generally has low hardness and poor wear resistance, the slider rail portion needs to be formed of a material having excellent wear resistance.
スライダ本体部を繊維強化形複合材料で形成すること
は同様に剛性を下げる意味もあるが、繊維方向をスライ
ダ長手方向としスライダの長手方向にはある程度剛性を
もたせてレールがそらないようにし、それと直角方向に
は曲がりやすくすれば、衝突力を吸収することができ
る。またスライダの軽量化も同時に達成できる。Forming the slider body with a fiber reinforced composite material also has the meaning of lowering the rigidity, but the fiber direction is the longitudinal direction of the slider and the slider has a certain degree of rigidity in the longitudinal direction so that the rail does not bend, and If it is easy to bend in the perpendicular direction, the collision force can be absorbed. Further, the weight of the slider can be reduced at the same time.
以下、本発明の一実施例を第１図により説明する。ス
ライダレール部１は耐摩耗性の良い材料、例えばSiC等
からなる。スライダ本体はヤング率の比較的小さい材
料、例えばMnZnフエライト等からなる。この二つの部材
は熱硬化性樹脂、あるいはガラス溶着等により接着形成
し、スライダ後端面には薄膜磁気記憶素子を形成する。
MnZnフエライトのヤング率は約15000kg/mm2でありSiCの
３分の１程度である。従つてSiCによりスライダ全体を
形成した場合に比べ接触時のダメージを２〜３分の１に
減らすことが可能となる。Hereinafter, an embodiment of the present invention will be described with reference to FIG. The slider rail portion 1 is made of a material having good wear resistance, for example, SiC or the like. The slider body is made of a material having a relatively small Young's modulus, such as MnZn ferrite. These two members are bonded and formed by thermosetting resin, glass welding, or the like, and a thin film magnetic storage element is formed on the rear end surface of the slider.
The Young's modulus of MnZn ferrite is about 15000 kg / mm 2 , which is about one third of that of SiC. Therefore, it is possible to reduce the damage at the time of contact by a factor of 2 to 3 as compared with the case where the entire slider is formed by SiC.
第２図はスライダ本体を繊維強化形複合材料により形
成したスライダを、繊維の方向がわかるように模式的に
示した実施例である。スライダレール部はSiC等で形成
する。強化繊維としては炭素，ガラス，セラミツクウイ
スカ等が使われ、ヤング率は8000kg/mm2程度である。第
２図のような繊維方向とすることにより、スライダの長
手方向には剛性を高められ、それと直角方向には曲がり
やすいため、レールのそりを小さくしかつ衝突力を効果
的に吸収することが可能となる。さらにスライダの軽量
化も同時に達成できる。浮上安定性が向上する。FIG. 2 shows an embodiment in which a slider in which the slider body is formed of a fiber-reinforced composite material is schematically shown so that the direction of the fiber can be recognized. The slider rail is formed of SiC or the like. Carbon, glass, ceramic whiskers, etc. are used as the reinforcing fibers, and the Young's modulus is about 8000 kg / mm 2 . By adopting the fiber direction as shown in FIG. 2, the rigidity can be increased in the longitudinal direction of the slider and the slider can be easily bent in the direction perpendicular thereto, so that the warpage of the rail can be reduced and the impact force can be effectively absorbed. It becomes possible. Further, the weight of the slider can be reduced at the same time. The flying stability is improved.
本発明によればスライダがデイスクの突起や、スライ
ダ／デイスク間介在物に接触した時の衝突力をスライダ
自身の変形振動により吸収できるので、浮上安定性を確
保したまま接触時のスライダ及びデイスクのダメージを
小さくする効果がある。According to the present invention, the collision force when the slider comes into contact with the protrusion of the disk or the inclusion between the slider and the disk can be absorbed by the deformation vibration of the slider itself, so that the slider and the disk at the time of contact can be absorbed while maintaining the flying stability. It has the effect of reducing damage.
第１図は本発明の第１の実施例のスライダの斜視図、第
２図は本発明の第２の実施例のスライダの斜視図であ
る。 １……スライダレール部、２……スライダ本体、３……
繊維強化形複合材料。FIG. 1 is a perspective view of a slider according to a first embodiment of the present invention, and FIG. 2 is a perspective view of a slider according to a second embodiment of the present invention. 1 ... Slider rail, 2 ... Slider body, 3 ...
Fiber reinforced composite material.
Claims (1)
レールから成る磁気ヘッドスライダにおいて、スライダ
レール部を摩擦磨耗特性の良いSiCで形成し、スライダ
本体部をレール部よりヤング率の小さい炭素，ガラス及
びセラミックウイスカから成る群から選ばれる繊維強化
形複合材料で形成したことを特徴とする磁気ヘッドスラ
イダ。1. A magnetic head slider having a thin-film magnetic recording element and comprising a plurality of slider rails, wherein a slider rail portion is formed of SiC having good friction and wear characteristics, and a slider body portion is formed of carbon having a smaller Young's modulus than the rail portion. A magnetic head slider formed of a fiber-reinforced composite material selected from the group consisting of a glass, a ceramic, and a ceramic whisker.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62131137A JP2613213B2 (en) | 1987-05-29 | 1987-05-29 | Magnetic head slider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62131137A JP2613213B2 (en) | 1987-05-29 | 1987-05-29 | Magnetic head slider |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63298789A JPS63298789A (en) | 1988-12-06 |
| JP2613213B2 true JP2613213B2 (en) | 1997-05-21 |
Family
ID=15050856
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62131137A Expired - Lifetime JP2613213B2 (en) | 1987-05-29 | 1987-05-29 | Magnetic head slider |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2613213B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8300360B2 (en) | 2008-05-13 | 2012-10-30 | Hitachi Global Storage Technologies, Netherlands B.V. | Compliant air bearing slider |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5625261A (en) * | 1979-08-08 | 1981-03-11 | Fujitsu Ltd | Magnetic head |
-
1987
- 1987-05-29 JP JP62131137A patent/JP2613213B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63298789A (en) | 1988-12-06 |
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