JPH01166385A - Magnetic disk - Google Patents
Magnetic diskInfo
- Publication number
- JPH01166385A JPH01166385A JP32427487A JP32427487A JPH01166385A JP H01166385 A JPH01166385 A JP H01166385A JP 32427487 A JP32427487 A JP 32427487A JP 32427487 A JP32427487 A JP 32427487A JP H01166385 A JPH01166385 A JP H01166385A
- Authority
- JP
- Japan
- Prior art keywords
- zone
- magnetic head
- magnetic
- magnetic disk
- head
- 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
- 230000003746 surface roughness Effects 0.000 claims abstract description 12
- 230000007423 decrease Effects 0.000 abstract description 2
- 230000000052 comparative effect Effects 0.000 description 11
- 239000000758 substrate Substances 0.000 description 11
- 239000010408 film Substances 0.000 description 9
- 230000003068 static effect Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 201000001432 Coffin-Siris syndrome Diseases 0.000 description 3
- 238000010794 Cyclic Steam Stimulation Methods 0.000 description 3
- 230000001050 lubricating effect Effects 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 229910000861 Mg alloy Inorganic materials 0.000 description 2
- 229910018487 Ni—Cr Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 229910017888 Cu—P Inorganic materials 0.000 description 1
- 229910018104 Ni-P Inorganic materials 0.000 description 1
- 229910018536 Ni—P Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 238000000992 sputter etching Methods 0.000 description 1
- 210000002784 stomach Anatomy 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は９例えば磁気ディスク装置に使用される磁気
ディスクの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of manufacturing a magnetic disk used, for example, in a magnetic disk device.
近年、コンピュータシステムにおける磁気ディスク装置
などの外部記憶装置の重要性が増大し。In recent years, the importance of external storage devices such as magnetic disk drives in computer systems has increased.
高記録密度に対する要求はますます高まっている。Demand for high recording densities is increasing.
磁気ディスク装置は記録再生ヘッド及び磁気ディスクの
主構成部から構成され磁気ディスクは高速で回転し記録
再生ヘッド即ち、磁気ヘッドは磁気ディスクより微少間
隔浮上している。磁気記録装置の高性能化に伴い、この
浮上間隔を小さくするために記録再生ヘッドの加重を小
さくするとともに接触始動ψ停止（コンタクト・スター
ト・ストップ：Ｃ３５）型ヘッド浮上システムが採用さ
れている。磁気ディスク装置の高記録密度化、高性能化
を図るためには、磁気記録媒体の薄層化、均−一様化、
磁気特性の改良（保磁力、角型比の向上）のみならず、
低浮上量における安定したヘッド浮上状態を確保し、ヘ
ッド、即ち磁気ヘッドとディスク、即ち磁気ディスクの
衝突（ヘッドクラッシュ）を防止するためのディスク表
面精度の向上、耐ヘツドクラツシユ性などの向上が重要
で必要なことである。特にディスク表面精度の向上は著
しく、従来のディスクのＲＩＩｌｇは２０００１以上あ
ったのが、現在ではＲｗが１００Ａ前後と１桁以上良く
なっている。A magnetic disk device is composed of the main components of a recording/reproducing head and a magnetic disk.The magnetic disk rotates at high speed, and the recording/reproducing head, that is, the magnetic head, floats a minute distance above the magnetic disk. As the performance of magnetic recording devices has improved, in order to reduce the flying distance, the load on the recording/reproducing head has been reduced and a contact start/stop (C35) type head flying system has been adopted. In order to increase the recording density and performance of magnetic disk devices, it is necessary to make the magnetic recording medium thinner, more uniform, and more efficient.
In addition to improving magnetic properties (improving coercive force and squareness ratio),
It is important to improve disk surface precision and head crash resistance in order to ensure a stable head flying state at low flying heights and prevent collisions between the head, that is, the magnetic head, and the disk, that is, the magnetic disk (head crash). It's necessary. In particular, the improvement in disk surface precision has been remarkable; the RIIlg of conventional disks was over 20,001, but now the Rw has improved by more than an order of magnitude to around 100A.
このようにディスクの表面精度が年々向上し。 In this way, the surface precision of disks has improved year by year.
磁気へラドスライダが磁気ディスクの表面に吸着し、磁
気ディスクが回転を始めても磁気へラドスライダが浮上
できず磁気へラドスライダ等が破損するなどの問題点が
あった。（Ｅ 、 Ｍ 、 Ｒｏｓｓｉ他、ジャーナル
・オブ・アプライド・フィシツクｘ （Ｊ 、 Ａｐｐ
ｌ、Ｐｈｙｓ、 ） ５５巻、６号、２２５４頁）。There have been problems in that the magnetic RAD slider sticks to the surface of the magnetic disk, and even when the magnetic disk starts rotating, the magnetic RAD slider cannot fly, resulting in damage to the magnetic RAD slider and the like. (E, M, Rossi et al., Journal of Applied Physics x (J, App
Phys, Vol. 55, No. 6, p. 2254).
この発明は、かかる問題点を解決するためになされたも
ので、磁気ヘッドの磁気ディスクへの吸着を防止し、信
頼性の高い磁気ディスクを得ることを目的とする。The present invention was made to solve this problem, and aims to prevent a magnetic head from adhering to a magnetic disk and obtain a highly reliable magnetic disk.
この発明の係る磁気ディスクは、始動および停止時に磁
気ヘッドが離着陸を行うコンタクト・スタート・ストッ
プゾーンと、始動後に上記磁気ヘッドとの間で情報の記
録・再生を行う情報ゾーンと、上記各ゾーンより表面粗
さが大きく、停止後に上記磁気ヘッドが載置される待避
ゾーンとを有するものである。The magnetic disk according to the present invention has a contact start/stop zone where the magnetic head takes off and lands when starting and stopping, an information zone where information is recorded and reproduced with the magnetic head after starting, and a The magnetic head has a large surface roughness and has a retreat zone in which the magnetic head is placed after stopping.
この発明における待避ゾーンは、他のゾーンより表面粗
さを太き（できるので、磁気ヘッドの吸着が起こりに（
い。The shelter zone in this invention has a thicker surface roughness than the other zones, which prevents the magnetic head from attracting it.
stomach.
以下、この発明の一実施例を図をもとに説明する。第１
図はこの発明の一実施例による磁気ディスクを示す断面
図であり１図において、１１１は始動および停止時に磁
気ヘッドが離着陸を行うコンタクト・スタート・ストッ
プ（以下Ｃ８Ｓと略す）ゾーン、（２）は停止後に磁気
ヘッドを置いておく待避ゾーン、（３１は始動後に磁気
ヘッドとの間で情報の記録・再生を行う情報ゾーンであ
る。なお、情報ゾーン＋３１では磁気ヘッドは浮上した
まま移動し。An embodiment of the present invention will be described below with reference to the drawings. 1st
Figure 1 is a sectional view showing a magnetic disk according to an embodiment of the present invention. In Figure 1, 111 is a contact start/stop (hereinafter abbreviated as C8S) zone where the magnetic head takes off and lands when starting and stopping; 31 is an information zone where information is recorded and reproduced with the magnetic head after starting. In the information zone +31, the magnetic head moves while floating.
通常は磁気ディスクと磁気ヘッドは接触しない。Normally, the magnetic disk and magnetic head do not come into contact with each other.
また、待避ゾーン（２）は他のゾーン１１１．１３１よ
り表面粗さが太き（形成されている。（５）は磁気記録
媒体層、Ｃ６１は下地層、（７）はＡｔ−Ｍｇ合金基板
である。In addition, the shelter zone (2) has a thicker surface roughness than the other zones 111.131. (5) is the magnetic recording medium layer, C61 is the underlayer, and (7) is the At-Mg alloy substrate. It is.
次に動作について説明する。磁気ディスク装置停止時の
場合、磁気ヘッドは待避ゾーン（２）に置かれ、磁気デ
ィスク回転スイッチＯＮによりモータ（図示せず）が駆
動しアクチュエータ（図示せず）とともに磁気ディスク
回転開始前にＣ８Ｓゾーン（１１に移動される。その後
、磁気ディスクが高速回転し、磁気ヘッドが浮上する。Next, the operation will be explained. When the magnetic disk drive is stopped, the magnetic head is placed in the evacuation zone (2), and when the magnetic disk rotation switch is turned ON, the motor (not shown) is driven and together with the actuator (not shown), the magnetic head is placed in the C8S zone before the magnetic disk starts rotating. (Moved to 11. After that, the magnetic disk rotates at high speed and the magnetic head flies.
磁気ヘッドはアクチュエータにより浮上自由に情報ゾー
ン（３）上を移動できる。磁気ディスク回転停止時には
、磁気ヘッドはＣ８Ｓゾーン１１）上に持ってこられ、
磁気ディスクの回転数減少に伴って磁気ヘッドは磁気デ
ィスク上に着陸する。その後、磁気ヘッドをモータによ
りアクチュエータとともにＣ８Ｓゾーン＋１１から待避
ゾーン（２）へ移動させる。The magnetic head can float freely and move above the information zone (3) by an actuator. When the magnetic disk rotation stops, the magnetic head is brought above the C8S zone 11),
As the rotational speed of the magnetic disk decreases, the magnetic head lands on the magnetic disk. Thereafter, the magnetic head is moved by the motor together with the actuator from the C8S zone +11 to the retreat zone (2).
なお、磁気ヘッドのＣ８Ｓゾーンｉｌ＋と待避ゾーン（
２〕との間の移動に際しては、磁気ヘッドを磁気ディス
ク表面から一担持ち上げてもよいし、磁気ディスク面を
摺動させてもよい。Note that the C8S zone il+ and the evacuation zone (
2], the magnetic head may be lifted off the surface of the magnetic disk, or may be slid on the surface of the magnetic disk.
次に、この発明の具体的な一実施例について比較例およ
び従来例と共に説明するが、この発明はこれに限定され
るものではない。ＡＬ−Ｍｇ合金基板（７）の表面に下
地層（６）としてＮ１−Ｐメツキ膜を成膜し鏡面加工し
である基材は９通常サブストレイトと呼ばれ市販されて
いる。市販サブストレイトを用い以下のように作成した
。Next, a specific example of the present invention will be described together with a comparative example and a conventional example, but the present invention is not limited thereto. A base material in which an N1-P plating film is formed as an underlayer (6) on the surface of an AL-Mg alloy substrate (7) and mirror-finished is commonly called a substrate and is commercially available. It was prepared as follows using a commercially available substrate.
実施例
待避ゾーン（２）の加工について説明する。テープ研磨
機にサブストレイトを装着し、サブストレイトの内周側
の待避ゾーン（２）に当たる部分に待避ゾーン（２）に
相当する幅のラッピングテープＷＡ＃６０００を押し当
てて基板を回転させた。押し圧１障、基板回転数２０Ｏ
ｒＩｍ、テープ送り速度２０１１ ／ｒｍの条件で行っ
た。Processing of the shunting zone (2) in the embodiment will be explained. The substrate was attached to a tape polishing machine, and a wrapping tape WA#6000 having a width corresponding to the shunting zone (2) was pressed against the inner peripheral side of the substrate corresponding to the shunting zone (2), and the substrate was rotated. Pressure: 1 failure, board rotation speed: 20O
The test was carried out under the conditions of rIm and tape feed rate of 2011/rm.
この基板上にＣｏ −Ｎｉ −Ｃｒの磁気記録媒体（５
）を成膜した。さらに潤滑膜を成膜し供試試料とした。A Co-Ni-Cr magnetic recording medium (5
) was deposited. Furthermore, a lubricating film was formed and used as a test sample.
この試料のＣＳＳゾーン１１）、待避ゾーン（２）。CSS zone 11) and evacuation zone (2) of this sample.
および情報ゾーン１３）の表面粗さＲｗはそれぞれ４０
０Ａ、１５００Ａ、２００Ａであった。and information zone 13) have a surface roughness Rw of 40, respectively.
They were 0A, 1500A, and 200A.
比較例
テープ研磨機にサブストレイトを装着し、サブストレイ
トの内周側のＣＳ Ｓ ＋ｔ＋ゾーンに当たる部分にＣ
８Ｓゾーンロ）に相当する幅のラッピングテープを押し
当てて加工した。条件は実施例と同様である。Comparative example: A substrate is attached to a tape polishing machine, and C
It was processed by pressing a wrapping tape with a width equivalent to 8S ZONERO). The conditions are the same as in the examples.
この基板上にＧｏ−Ｎｉ −Ｃｒ の磁気記録媒体（
５）を成膜した。さらに潤滑膜を成膜し供試試料とした
。A Go-Ni-Cr magnetic recording medium (
5) was formed into a film. Furthermore, a lubricating film was formed and used as a test sample.
であった。Met.
従来例
市販サブストレイト上に、Ｃｏ−Ｎｉ−Ｃｒ の磁気
記録媒体を成膜した。さらに潤滑膜を成膜し供試試料と
した。この試料のＣ８ＳゾーンＩｌ＋および情報ゾーン
（３）の表面粗さＲｍはすべて同じで２０ＯＡであった
。Conventional Example A Co--Ni--Cr magnetic recording medium was formed on a commercially available substrate. Furthermore, a lubricating film was formed and used as a test sample. The surface roughness Rm of the C8S zone Il+ and information zone (3) of this sample were all the same, 20OA.
次に上記実施例による磁気ディスク試料の待避ゾーン（
２）、比較例による磁気ディスク試料のＣ８Ｓゾーン１
１１．および従来例による磁気ディスク試料のＣ８Ｓゾ
ーンｆｉ＋のそれぞれの表面に、３３８Ｇ形薄膜ヘツド
を接触させ静摩擦係数を測定した。Next, the evacuation zone (
2) C8S zone 1 of magnetic disk sample according to comparative example
11. A 338G type thin film head was brought into contact with each surface of the C8S zone fi+ of the conventional magnetic disk sample, and the coefficient of static friction was measured.
実施例によるディスクでは０．１９．比較例によるディ
スクでは０．２２．従来例によるディスクでは０３８で
あり１本発明と比較例によるディスクでは静摩擦係数は
小さ（なった。In the disc according to the embodiment, 0.19. The disc according to the comparative example has a disc size of 0.22. The coefficient of static friction was 038 for the disk according to the conventional example, and was small for the disks according to the present invention and the comparative example.
また、上記の条件で環境を６０℃、相対湿度８５％の状
態にして２４時間放置し、静摩擦係数を測定した。実施
例によるディスクでは０．２５ 、比較例によるディス
クでは０２Ｂ、従来例によるディスクでは０．９を越え
ており吸着現象が認められた。Further, the static friction coefficient was measured under the above conditions at 60° C. and 85% relative humidity for 24 hours. The disc according to the example exceeded 0.25, the disc according to the comparative example exceeded 02B, and the disc according to the conventional example exceeded 0.9, indicating an adsorption phenomenon.
さらに磁気ディスクの耐久試験として一般的なＣ８Ｓ試
験を行った。ヘッドスライダとしてサファイアを用いた
。その結果を第２図に示す。縦軸にそれぞれのディスク
静摩擦係数、横軸にＣ８Ｓ回数を示した。○印は実施例
によるディスクの待避ゾーン（２）９口印は比較例によ
るディスクのＣ８ＳゾーンＩｌｌ、 Ｘ印は従来例によ
るディスクのＣ３ＳゾーンＩｌ＋のそれぞれ静摩擦係数
の変化を示す。実施例によるディスクでは全（変化は認
められない。Furthermore, a general C8S test was conducted as a durability test for magnetic disks. Sapphire was used as the head slider. The results are shown in FIG. The vertical axis shows the static friction coefficient of each disk, and the horizontal axis shows the number of C8S. The circle mark indicates the change in the static friction coefficient of the withdrawal zone (2) of the disk according to the example, the C8S zone Ill of the disk according to the comparative example, and the C3S zone Il+ of the conventional disk. In the disc according to the example, no change was observed.
比較例によるディスクでは初期は小さいが、ＣＳＳ回数
が多くなるにつれて次第に静摩擦係数が増大していき、
ＣＳＳ回数２０００回を越える頃には従来例とほぼ同一
の値を示している。従来例によるディスクでは初期の値
から漸増している。In the disk according to the comparative example, the coefficient of static friction is small at the beginning, but as the number of CSS increases, it gradually increases.
By the time the number of CSSs exceeds 2000, it shows almost the same value as the conventional example. In conventional disks, the value increases gradually from the initial value.
Ｃ８Ｓ回数３０００回後、磁気ディスク上にヘッドを接
触させたまま環境を６０℃、相対湿度８５％の状態にし
て２４時間放置し、静摩擦係数を測定した。実施例によ
るディスクでは０．２７．比較例によるディスク、従来
例によるディスクでは０．９を越えており吸着現象が認
められた。After 3000 C8S cycles, the head was kept in contact with the magnetic disk and left in an environment of 60° C. and 85% relative humidity for 24 hours, and the static friction coefficient was measured. In the disc according to the example, 0.27. In the disk according to the comparative example and the disk according to the conventional example, it exceeded 0.9, and an adsorption phenomenon was observed.
このように９本発明の実施例による磁気ディスクでは磁
気ディスクと磁気ヘッド間の吸着力を小さく保つことが
できた。一方、比較例による磁気ディスクでは初期の性
能は本発明による磁気ディスクと変わりがないが、使用
していくうちに従来の磁気ディスクと同様になっていく
。この原因は。As described above, in the magnetic disk according to the nine embodiments of the present invention, the attraction force between the magnetic disk and the magnetic head could be kept small. On the other hand, the initial performance of the magnetic disk according to the comparative example is the same as that of the magnetic disk according to the present invention, but as it is used, it becomes similar to the conventional magnetic disk. What is the cause of this?
Ｃ８Ｓを繰り返すうちに表面粗さの大きなＣ８Ｓゾーン
Ｉｌ＋が離着陸の衝撃で次第に滑らかになっていくため
であると考えられる。This is thought to be because as C8S is repeated, the C8S zone Il+, which has a large surface roughness, gradually becomes smooth due to the impact of takeoff and landing.
なお、上記実施例では待避ゾーン（２）の加工にテープ
研磨機を用いた場合について説明したが、他のスパッタ
エツチングのような加工法であってもよく上記実施例と
同様の効果を奏する。In the above embodiment, a tape polishing machine was used to process the retraction zone (2), but other processing methods such as sputter etching may also be used to produce the same effects as in the above embodiment.
また、上記実施例では待避ゾーン（２）の加工をサブス
トレイト上に行ったが、磁気記録媒体層（５）Ｊ：、。Further, in the above embodiment, the retraction zone (2) was processed on the substrate, but the magnetic recording medium layer (5) J:.
磁気記録媒体層（５］上に設けられる保護膜上などに行
ってもよく上記実施例と同様の効果を奏する。It may also be applied to a protective film provided on the magnetic recording medium layer (5), and the same effect as in the above embodiment can be obtained.
また、上記実施例では円板状磁気ディスクの内側から順
に待避ゾーン＋２１．Ｃ３Ｓゾーン１１）、情報ゾーン
（３）を設けた場合について示したが、各ゾーンの配置
の順番はこれに限るものではなく、適宜選んでよい。In the above embodiment, the evacuation zone +21. Although the case where the C3S zone 11) and the information zone (3) are provided is shown, the order of arrangement of each zone is not limited to this and may be selected as appropriate.
また、上記実施例では磁気記録媒体がＣｏ −Ｎｉ −
Ｃｒ の場合について説明したが、他の合金媒体。Further, in the above embodiment, the magnetic recording medium is Co-Ni-
Although the case of Cr has been described, other alloying media.
金属媒体、金属酸化物媒体であってもよく上記実施例と
同様の効果を奏する。A metal medium or a metal oxide medium may be used, and the same effects as in the above embodiments can be obtained.
また、上記実施例では下地層（６）がＮｉ −Ｐ メツ
キ膜の場合について説明したが、他のアルマイト膜、Ｎ
１−Ｃｕ−Ｐ膜であってもよ（上記実施例と同様の効果
を奏する。Further, in the above embodiment, the case where the base layer (6) is a Ni-P plating film is explained, but other alumite films, N
A 1-Cu-P film may also be used (it has the same effect as the above embodiment).
なお、上記実施例では待避ゾーン（２）の表面粗さＲｒ
ｗｔカ月ｓ ｏ ａＡである場合について示したが。In addition, in the above embodiment, the surface roughness Rr of the retraction zone (2)
The case where wt month so aA is shown is shown.
５０ＯＡ以上であれば上記実施例と同様の効果が得られ
る。すなわち、第３図に摩擦係数と表面粗さの関係を示
したが、Ｒａｇが５００Ａ以下の場合。If it is 50 OA or more, the same effect as the above embodiment can be obtained. That is, although the relationship between the friction coefficient and surface roughness is shown in FIG. 3, when Rag is 500A or less.
摩擦係数のばらつきが大きくかつ最大値が０．５を越え
ることが多い。一方、ＲＷ５００Ａ以上の場合、摩擦係
数の値が小さくなり、また最大値と最小値の幅が小さく
なり安定した摩擦係数を示している。このようにＲＷが
５００Ａ以上であれば。The coefficient of friction varies widely, and the maximum value often exceeds 0.5. On the other hand, when the RW is 500A or more, the value of the friction coefficient becomes small, and the width between the maximum value and the minimum value becomes small, indicating a stable friction coefficient. In this way, if RW is 500A or more.
摩擦係数は再現性よく小さな値を期待できる。The friction coefficient can be expected to have a small value with good reproducibility.
以上のように、この発明によれば、始動および停止時に
磁気ヘッドが離着陸を行うフンタクト・スタート・スト
ップゾーンと、始動後に上記磁気ヘッドとの間で情報の
記録・再生を行う情報ゾーンと、上記各ゾーンより表面
粗さが大きく、停止後に上記磁気ヘッドが載置される待
避ゾーンとを有するので、磁気ヘッドが磁気ディスクに
吸着しに（く信頼性の高い磁気ディスクが得られる効果
がある。As described above, according to the present invention, there is a simple start/stop zone where the magnetic head takes off and lands when starting and stopping, an information zone where information is recorded and reproduced between the magnetic head after starting, and the above-mentioned information zone. Since the magnetic head has a retreat zone where the surface roughness is larger than that of each zone and where the magnetic head is placed after stopping, the magnetic head is less likely to be attracted to the magnetic disk, and a highly reliable magnetic disk can be obtained.
第１図はこの発明の一実施例による磁気ディスクを示す
断面図、第２図はこの発明の一実施例。
比較例、および従来例のＣ８Ｓ試験結果を示す特性図、
第３図は摩擦係数と表面粗さの関係を示す特性図である
。
１１：・・・Ｃ８Ｓゾーン、（２）・・・待避ゾーン、
（３）・・・情報ゾーン、（５）・・・磁気記録媒体層
、（６）・・・下地層、（７）・・・ＡＬ−Ｍｙ合金基
板。FIG. 1 is a sectional view showing a magnetic disk according to an embodiment of the invention, and FIG. 2 is an embodiment of the invention. Characteristic diagram showing C8S test results of comparative example and conventional example,
FIG. 3 is a characteristic diagram showing the relationship between friction coefficient and surface roughness. 11:... C8S zone, (2)... Evacuation zone,
(3) Information zone, (5) Magnetic recording medium layer, (6) Base layer, (7) AL-My alloy substrate.
Claims (1)
ンタクト・スタート・ストップゾーンと、始動後に上記
磁気ヘッドとの間で情報の記録・再生を行う情報ゾーン
と、上記各ゾーンより表面粗さが大きく、停止後に上記
磁気ヘッドが載置される待避ゾーンとを有する磁気ディ
スク。(1) The contact start/stop zone where the magnetic head takes off and lands when starting and stopping, the information zone where information is recorded and reproduced with the magnetic head after starting, and the surface roughness is greater than each of the above zones. , and a retreat zone on which the magnetic head is placed after stopping.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32427487A JPH01166385A (en) | 1987-12-22 | 1987-12-22 | Magnetic disk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32427487A JPH01166385A (en) | 1987-12-22 | 1987-12-22 | Magnetic disk |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01166385A true JPH01166385A (en) | 1989-06-30 |
Family
ID=18163978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32427487A Pending JPH01166385A (en) | 1987-12-22 | 1987-12-22 | Magnetic disk |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01166385A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0779611A2 (en) | 1995-12-13 | 1997-06-18 | International Business Machines Corporation | Multiple zone data storage system and method |
| US5729399A (en) * | 1995-12-13 | 1998-03-17 | International Business Machines Corporation | Contact start/stop disk drive with minimized head-disk wear in textured landing zone |
-
1987
- 1987-12-22 JP JP32427487A patent/JPH01166385A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0779611A2 (en) | 1995-12-13 | 1997-06-18 | International Business Machines Corporation | Multiple zone data storage system and method |
| US5729399A (en) * | 1995-12-13 | 1998-03-17 | International Business Machines Corporation | Contact start/stop disk drive with minimized head-disk wear in textured landing zone |
| US5798884A (en) * | 1995-12-13 | 1998-08-25 | International Business Machines Corporation | Multiple zone data storage system and method |
| US6501624B1 (en) | 1995-12-13 | 2002-12-31 | International Business Machines Corporation | Multiple zone data storage system and method |
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