JPH0589624A - Magnetic disk device - Google Patents

Magnetic disk device

Info

Publication number
JPH0589624A
JPH0589624A JP25256691A JP25256691A JPH0589624A JP H0589624 A JPH0589624 A JP H0589624A JP 25256691 A JP25256691 A JP 25256691A JP 25256691 A JP25256691 A JP 25256691A JP H0589624 A JPH0589624 A JP H0589624A
Authority
JP
Japan
Prior art keywords
magnetic disk
magnetic
magnetic head
head
strip
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
Application number
JP25256691A
Other languages
Japanese (ja)
Inventor
Yuichi Iida
愉一 飯田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Priority to JP25256691A priority Critical patent/JPH0589624A/en
Publication of JPH0589624A publication Critical patent/JPH0589624A/en
Pending legal-status Critical Current

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
    • G11B5/60—Fluid-dynamic spacing of heads from record-carriers
    • G11B5/6005—Specially adapted for spacing from a rotating disc using a fluid cushion
    • 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
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
    • G11B5/1871—Shaping or contouring of the transducing or guiding surface
    • 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
    • G11B5/74—Record carriers characterised by the form, e.g. sheet shaped to wrap around a drum
    • G11B5/82—Disk carriers

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Magnetic Record Carriers (AREA)

Abstract

(57)【要約】 【目的】 磁気ヘッド７の磁気ディスク９に対する浮上
量の低下が進んでも、磁気ヘッド７と磁気ディスク９と
の吸着現象を抑制する。 【構成】 磁気ヘッド７及び磁気ディスク９のそれぞれ
の相対向する表面に、一方向に延長形成される帯状凸部
１１及び１３を形成し、この各帯状凸部１１及び１３
は、磁気ヘッド７と磁気ディスク９とが相互に対向配置
された状態で相互にπ／２±π／４の範囲内の角度をな
して形成されている。 (57) [Abstract] [Purpose] Even if the flying height of the magnetic head 7 with respect to the magnetic disk 9 is reduced, the attraction phenomenon between the magnetic head 7 and the magnetic disk 9 is suppressed. [Structure] Band-shaped convex portions 11 and 13 extending in one direction are formed on surfaces of the magnetic head 7 and the magnetic disk 9 which face each other, and the respective band-shaped convex portions 11 and 13 are formed.
Are formed at an angle within a range of π / 2 ± π / 4 with respect to each other in a state where the magnetic head 7 and the magnetic disk 9 are arranged to face each other.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】この発明は、磁気ヘッドが、磁気
ディスクの回転停止時には磁気ディスクに接触し、回転
作動時には磁気ディスクに対して微少量浮上して記録再
生を行う磁気ディスク装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic disk apparatus in which a magnetic head comes into contact with a magnetic disk when the magnetic disk stops rotating, and when the magnetic disk rotates, a magnetic disk floats slightly above the magnetic disk for recording and reproduction.

【０００２】[0002]

【従来の技術】磁気ディスク装置は、図７にその内部構
造を示すように、磁気ヘッド１が回転状態の磁気ディス
ク３に対し、回転により発生する空気流による動圧の作
用を受けて微少量浮上するスライダ５を有し、微少量浮
上した状態で情報の記録再生を行うが、磁気ディスク３
が回転起動する際、及び停止する際には、磁気ヘッド１
と磁気ディスク３とが相互に摺動するコンタクト・スタ
ート・ストップ（ＣＳＳ）方式が採用されているものが
多い。このＣＳＳ方式では、磁気ディスク３の回転停止
時には、磁気ヘッド１のスライダ面と磁気ディスク１の
表面とは、相互に接触状態にあり、場合によっては吸着
現象を起こし、最悪の場合磁気ディスク３の回転起動が
できなくなる事態が発生する。2. Description of the Related Art As shown in the internal structure of FIG. 7, a magnetic disk device has a very small amount of magnetic disk 1 in which a magnetic head 1 is rotated by the action of dynamic pressure due to an air flow generated by rotation. Information is recorded / reproduced in a state of having a slider 5 which floats, and a magnetic disk 3
When the magnetic head is rotated and stopped, the magnetic head 1
In many cases, a contact start stop (CSS) method in which the magnetic disk 3 and the magnetic disk 3 slide with each other is adopted. In this CSS method, when the rotation of the magnetic disk 3 is stopped, the slider surface of the magnetic head 1 and the surface of the magnetic disk 1 are in contact with each other, and in some cases an adsorption phenomenon occurs. The situation that rotation start cannot be performed occurs.

【０００３】このような磁気ヘッド１と磁気ディスク３
との吸着現象を防ぐために、従来では磁気ディスク１の
表面に意識的にある粗さを形成するテクスチャリングと
呼ばれる表面処理を行う場合がある。また、磁気ヘッド
１のスライダ面側に粗面を形成する場合もある。Such a magnetic head 1 and a magnetic disk 3
In order to prevent the adsorption phenomenon between the magnetic disk 1 and the magnetic disk 1, a surface treatment called texturing that intentionally forms a certain roughness on the surface of the magnetic disk 1 may be performed. A rough surface may be formed on the slider surface side of the magnetic head 1.

【０００４】[0004]

【発明が解決しようとする課題】しかしながら、磁気デ
ィスク装置として高密度記録化が進むにつれて、磁気ヘ
ッドの磁気ディスクに対する浮上量の低下が進み、この
ため前記テクスチャリングによる表面粗さの度合いを、
ある程度抑制する必要が生じ、磁気ヘッドと磁気ディス
クとの吸着に対する余裕がなくなってきている。However, as the recording density of the magnetic disk device is increased, the flying height of the magnetic head with respect to the magnetic disk is decreased, and therefore the degree of surface roughness due to the texturing is reduced.
Since it is necessary to suppress the magnetic field to some extent, there is no more room to attract the magnetic head and the magnetic disk.

【０００５】そこで、この発明は、磁気ヘッドの磁気デ
ィスクに対する浮上量の低下が進んでも、磁気ヘッドと
磁気ディスクとの吸着現象を抑制することを目的として
いる。Therefore, an object of the present invention is to suppress the attraction phenomenon between the magnetic head and the magnetic disk even if the flying height of the magnetic head with respect to the magnetic disk is reduced.

【０００６】[0006]

【課題を解決するための手段】前記目的を達成するため
にこの発明は、磁気ヘッドが、磁気ディスクの回転停止
時には磁気ディスクに接触し、回転作動時には磁気ディ
スクに対して微少量浮上して記録再生を行う磁気ディス
ク装置において、前記磁気ヘッドと磁気ディスクとの相
互に対向するそれぞれの表面に、一方向に延長形成され
る帯状凸部を形成し、この各帯状凸部は、磁気ヘッドと
磁気ディスクとが相互に対向配置された状態で相互に所
定の角度をなして形成されている構成とした。In order to achieve the above-mentioned object, according to the present invention, a magnetic head contacts a magnetic disk when the rotation of the magnetic disk is stopped, and a small amount of data is levitated above the magnetic disk during the rotation operation for recording. In a magnetic disk device for reproducing, strip-shaped convex portions extending in one direction are formed on respective surfaces of the magnetic head and the magnetic disk that face each other, and each strip-shaped convex portion is formed by a magnetic head and a magnetic disk. The disk and the disk are arranged so as to face each other and form a predetermined angle with each other.

【０００７】[0007]

【作用】このような構成の磁気ディスク装置によれば、
磁気ヘッドと磁気ディスクとの相互に対向するそれぞれ
の表面に設けられる一方向に延長形成される帯状凸部
は、磁気ヘッドと磁気ディスクとが相互に対向配置され
た状態で相互に所定の角度をなして形成されているの
で、帯状凸部相互の接触面積は小さいものとなり、磁気
ヘッドの磁気ディスクに対する浮上量の低下が進んで
も、両者相互の吸着現象は防止される。According to the magnetic disk device having such a structure,
The strip-shaped projections formed on the respective surfaces of the magnetic head and the magnetic disk facing each other and extending in one direction form a predetermined angle with each other in a state where the magnetic head and the magnetic disk are arranged to face each other. Since it is formed, the contact area between the strip-shaped convex portions becomes small, and even if the flying height of the magnetic head with respect to the magnetic disk decreases, the mutual adsorption phenomenon between the both is prevented.

【０００８】[0008]

【実施例】以下、この発明の実施例を図面に基づき説明
する。Embodiments of the present invention will be described below with reference to the drawings.

【０００９】図１は、磁気ヘッド７と磁気ディスク９と
のそれぞれの相対向する表面相互が接触している状態を
示している。この各表面には磁気ヘッド７と磁気ディス
ク９との吸着現象を防止するために適度な粗さを形成し
てあり、この表面粗さの度合いは、磁気ディスク装置と
しての高密度記録化に伴う磁気ヘッド７の磁気ディスク
９に対する浮上量の低下に対応して、ある程度抑制して
ある。FIG. 1 shows a state in which the surfaces of the magnetic head 7 and the magnetic disk 9 which are opposed to each other are in contact with each other. A moderate roughness is formed on each of these surfaces in order to prevent the magnetic head 7 and the magnetic disk 9 from being attracted to each other. The degree of this surface roughness is associated with high density recording as a magnetic disk device. The magnetic head 7 is suppressed to some extent in response to the reduction in the flying height of the magnetic disk 9.

【００１０】このような表面粗さは、磁気ヘッド７につ
いては、一方向に延長形成される微細な帯状凸部１１が
複数形成され、磁気ディスク９にも同様に一方向に延長
形成される微細な帯状凸部１３が複数形成されている。
そして、これら各帯状凸部１１，１３相互は、磁気ヘッ
ド７と磁気ディスク９とが相互に対向配置された状態で
所定の相対角θをなして形成されている。ここでは、こ
の相対角θはπ／２±π／４の範囲内に設定してあり、
この場合での磁気ヘッド７と磁気ディスク９との相互の
接触部の面積は、図２のように、帯状凸部１１，１３同
志が交差する部分Ａとなる。Such surface roughness is such that, in the magnetic head 7, a plurality of fine band-shaped convex portions 11 extending in one direction are formed, and the magnetic disk 9 is also extended in one direction. Multiple strip-shaped convex portions 13 are formed.
The respective band-shaped convex portions 11 and 13 are formed at a predetermined relative angle θ with the magnetic head 7 and the magnetic disk 9 arranged to face each other. Here, this relative angle θ is set within the range of π / 2 ± π / 4,
In this case, the area of the mutual contact portion between the magnetic head 7 and the magnetic disk 9 is a portion A where the strip-shaped convex portions 11 and 13 intersect each other as shown in FIG.

【００１１】この接触部Ａの一個あたりの面積Ｓを、図
３により求めると、 ｘ・sin α＝ａ2 ｘ＝ａ2 ／ sinα であり、一方 Ｓ＝ａ1 ・ｘ であるから、 Ｓ＝ａ1 ・ａ2 ／ sinα となる。但し、ａ1 ：磁気ヘッド７の帯状凸部１１の幅 ａ2 ：磁気ディスク９の帯状凸部１３の幅 ｘ：接触部Ａの一辺の長さ α＝π−θ ここで、αがほぼ０に近付くと、Ｓは単位長さＬ（磁気
ヘッド７のスライダ長）における最大値となり、α＝０
の状態、つまり図４のように磁気ヘッド７と磁気ディス
ク９のそれぞれの帯状凸部１１，１３が互いに平行とな
る状態では、図５のように接触部Ｂは帯状となり、その
接触面積はＳ＝ａ1 ・Ｌとなる。When the area S per contact portion A is obtained from FIG. 3, it is x.sin α = a 2 x = a 2 / sin α, while S = a 1 x, so S = It becomes a 1 · a 2 / sin α. Where a 1 is the width of the strip-shaped protrusion 11 of the magnetic head a 2 is the width of the strip-shaped protrusion 13 of the magnetic disk 9 x is the length of one side of the contact portion A α = π−θ where α is almost 0 S becomes the maximum value in the unit length L (slider length of the magnetic head 7), and α = 0.
In this state, that is, as shown in FIG. 4, in which the magnetic head 7 and the magnetic disk 9 have their respective strip-shaped convex portions 11 and 13 parallel to each other, the contact portion B has a strip-like shape as shown in FIG. = A 1 · L.

【００１２】さて、磁気ヘッド７と磁気ディスク９との
接触時における吸着力Ｆは、接触面積Ｓと比例関係にあ
り、相対角θと吸着力Ｆとの関係は、図６のように示さ
れる。このため、θ＝π／２のとき、つまり磁気ヘッド
７と磁気ディスク９との各帯状凸部１１，１３相互が直
交する状態では、吸着力Ｆは最小のＦmin となる。一
方、吸着力Ｆが最大のＦmax となるのは、図４に示した
θ＝０もしくはπのときであり、本実施例のようにθ＝
π／２±π／４とすることで、吸着力Ｆは最大の吸着力
Ｆmax に対してほぼ半分とすることができる。Now, the attraction force F at the time of contact between the magnetic head 7 and the magnetic disk 9 is proportional to the contact area S, and the relation between the relative angle θ and the attraction force F is shown in FIG. .. Therefore, when θ = π / 2, that is, when the strip-shaped convex portions 11 and 13 of the magnetic head 7 and the magnetic disk 9 are orthogonal to each other, the attraction force F becomes the minimum Fmin. On the other hand, the attraction force F becomes the maximum Fmax when θ = 0 or π shown in FIG. 4, and θ = as in this embodiment.
By setting π / 2 ± π / 4, the attraction force F can be almost half of the maximum attraction force Fmax.

【００１３】このように、磁気ヘッド７と磁気ディスク
９との吸着力Ｆを低く抑えられるので、磁気ディスク装
置の高記録密度化に伴う磁気ヘッド７の磁気ディスク９
に対する浮上量の低下に対応すべく、磁気ヘッド７ある
いは磁気ディスク９の相対向する表面の粗さの度合いを
抑制しても、磁気ヘッド７と磁気ディスク９との吸着現
象が防止される。As described above, since the attraction force F between the magnetic head 7 and the magnetic disk 9 can be suppressed to a low level, the magnetic disk 9 of the magnetic head 7 accompanying the higher recording density of the magnetic disk device.
Even if the degree of roughness of the opposing surfaces of the magnetic head 7 or the magnetic disk 9 is suppressed in order to cope with the decrease in the flying height with respect to the magnetic head 7, the attraction phenomenon between the magnetic head 7 and the magnetic disk 9 is prevented.

【００１４】[0014]

【発明の効果】以上説明してきたようにこの発明によれ
ば、磁気ヘッド及び磁気ディスクのそれぞれの相対向す
る表面に設けた一方向に延長形成される帯状凸部を、磁
気ヘッドと磁気ディスクとが相互に対向配置された状態
で相互に所定の角度をなすよう形成したので、磁気ヘッ
ドと磁気ディスクとの吸着現象を抑制することができ、
磁気ディスク装置の高記録密度化に充分対応できる。As described above, according to the present invention, the strip-shaped projections formed on the surfaces of the magnetic head and the magnetic disk facing each other and extending in one direction are formed on the magnetic head and the magnetic disk. Are formed so as to form a predetermined angle with each other in a state where they are arranged to face each other, it is possible to suppress the adsorption phenomenon between the magnetic head and the magnetic disk,
It can sufficiently cope with the high recording density of the magnetic disk device.

【図面の簡単な説明】[Brief description of drawings]

【図１】この発明の一実施例を示す磁気ヘッド、磁気デ
ィスク相互の接触モデル図である。FIG. 1 is a contact model diagram of a magnetic head and a magnetic disk according to an embodiment of the present invention.

【図２】図１の接触部を示す説明図である。FIG. 2 is an explanatory diagram showing a contact portion of FIG.

【図３】図２の接触部面積を算出するための説明図であ
る。FIG. 3 is an explanatory diagram for calculating the contact area of FIG.

【図４】接触部面積が最大となるモデル図である。FIG. 4 is a model diagram in which the contact area is maximum.

【図５】図４の接触部を示す説明図である。FIG. 5 is an explanatory view showing a contact portion of FIG.

【図６】相対角と吸着力との相関図である。FIG. 6 is a correlation diagram between a relative angle and an attraction force.

【図７】磁気ディスク装置の内部構造を示す斜視図であ
る。FIG. 7 is a perspective view showing an internal structure of a magnetic disk device.

【符号の説明】[Explanation of symbols]

７ 磁気ヘッド ９ 磁気ディスク １１，１３ 帯状凸部 θ 相対角 7 magnetic head 9 magnetic disk 11 and 13 strip-shaped convex portion θ relative angle

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】 磁気ヘッドが、磁気ディスクの回転停止
時には磁気ディスクに接触し、回転作動時には磁気ディ
スクに対して微少量浮上して記録再生を行う磁気ディス
ク装置において、前記磁気ヘッドと磁気ディスクとの相
互に対向するそれぞれの表面に、一方向に延長形成され
る帯状凸部を形成し、この各帯状凸部は、磁気ヘッドと
磁気ディスクとが相互に対向配置された状態で相互に所
定の角度をなして形成されていることを特徴とする磁気
ディスク装置。1. A magnetic disk device in which a magnetic head contacts the magnetic disk when the rotation of the magnetic disk is stopped, and floats a small amount above the magnetic disk when the magnetic disk rotates to perform recording / reproduction. Strip-shaped convex portions extending in one direction are formed on respective surfaces of the magnetic head and the magnetic disk, which are arranged in a predetermined direction in a state where the magnetic head and the magnetic disk are arranged to face each other. A magnetic disk drive characterized by being formed at an angle.
JP25256691A 1991-09-30 1991-09-30 Magnetic disk device Pending JPH0589624A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25256691A JPH0589624A (en) 1991-09-30 1991-09-30 Magnetic disk device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25256691A JPH0589624A (en) 1991-09-30 1991-09-30 Magnetic disk device

Publications (1)

Publication Number Publication Date
JPH0589624A true JPH0589624A (en) 1993-04-09

Family

ID=17239162

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25256691A Pending JPH0589624A (en) 1991-09-30 1991-09-30 Magnetic disk device

Country Status (1)

Country Link
JP (1) JPH0589624A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07192422A (en) * 1993-12-28 1995-07-28 Nec Corp Magnetic disk device
US6072663A (en) * 1997-03-17 2000-06-06 Fujitsu Limited Magnetic head slider with elongated projections for reducing stiction and dust buildup

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07192422A (en) * 1993-12-28 1995-07-28 Nec Corp Magnetic disk device
US6072663A (en) * 1997-03-17 2000-06-06 Fujitsu Limited Magnetic head slider with elongated projections for reducing stiction and dust buildup

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