JPS62209709A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPS62209709A JPS62209709A JP5310686A JP5310686A JPS62209709A JP S62209709 A JPS62209709 A JP S62209709A JP 5310686 A JP5310686 A JP 5310686A JP 5310686 A JP5310686 A JP 5310686A JP S62209709 A JPS62209709 A JP S62209709A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic recording
- recording medium
- magnetic
- magnetic head
- lubricating oil
- 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.)
- Granted
Links
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 claims abstract description 13
- 229910052731 fluorine Inorganic materials 0.000 claims abstract description 13
- 239000011737 fluorine Substances 0.000 claims abstract description 13
- 239000000314 lubricant Substances 0.000 claims abstract description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims abstract 5
- 239000000463 material Substances 0.000 abstract description 11
- 239000011248 coating agent Substances 0.000 abstract description 6
- 238000000576 coating method Methods 0.000 abstract description 6
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 6
- 239000010410 layer Substances 0.000 abstract description 5
- 239000011241 protective layer Substances 0.000 abstract description 4
- 229910052581 Si3N4 Inorganic materials 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 abstract description 2
- 239000000758 substrate Substances 0.000 abstract 1
- 239000010687 lubricating oil Substances 0.000 description 28
- 238000001179 sorption measurement Methods 0.000 description 9
- 229910052582 BN Inorganic materials 0.000 description 6
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 description 6
- NRTOMJZYCJJWKI-UHFFFAOYSA-N Titanium nitride Chemical compound [Ti]#N NRTOMJZYCJJWKI-UHFFFAOYSA-N 0.000 description 5
- 239000010408 film Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000009736 wetting Methods 0.000 description 4
- 238000005461 lubrication Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000010365 information processing Effects 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910005091 Si3N Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［発明の目的コ
（産業上の利用分野）
この発明は、フロッピーディスク、ハードディスク、Ｖ
ＴＲなどに使用される磁気ヘッドに係わり、特に磁気記
録媒体と潤滑油を介して接触する磁気ヘッドの吸着現象
を防止できるようにした磁気ヘッドに関する。[Detailed Description of the Invention] [Object of the Invention (Industrial Application Field) This invention provides a floppy disk, a hard disk, a V
The present invention relates to a magnetic head used for TR and the like, and particularly relates to a magnetic head that can prevent the attraction phenomenon of a magnetic head that comes into contact with a magnetic recording medium via lubricating oil.
（従来の技術）
近年、情報処理技術の発達に伴って記憶装置が担う情報
処理量は飛躍的に増加し、磁気記録装置に対する大容量
化および信頼性の要求が益々高まっている。(Prior Art) In recent years, with the development of information processing technology, the amount of information processing handled by storage devices has increased dramatically, and demands for higher capacity and reliability for magnetic recording devices are increasing.
このため、大容量化に適したｃｏ−ｃｒのような金属薄
膜を用いた磁気記録媒体も使用されているが、このよう
な金属磁性薄膜を用いた磁気記録媒体では、特に磁気ヘ
ッドとの表面潤滑が重要な問題となる。つまり、ハード
ディスクではコンタクト・スタート・ストップ時に磁気
ヘッドと磁気ディスクとが直接接触を繰返し、またフロ
ッピーディスク装置では、高速回転している磁気ディス
クにリード・ライト期間中磁気ヘッドが接触状態を保っ
ている。このため、磁気ディスクの表面潤滑が適切でな
いと、その表面にスクラッチを生じ、摩耗が進行して磁
気ディスクの寿命や性能が低下してしまうという問題が
ある。勿論、このような問題は他の塗布型記録媒体に共
通する問題でもある。For this reason, magnetic recording media using metal thin films such as co-cr, which are suitable for increasing capacity, are also used. Lubrication becomes an important issue. In other words, in hard disks, the magnetic head and magnetic disk repeatedly come into direct contact during contact start and stop, and in floppy disk drives, the magnetic head maintains contact with the high-speed rotating magnetic disk during read/write periods. . Therefore, if the surface lubrication of the magnetic disk is not appropriate, there is a problem in that scratches occur on the surface and wear progresses, reducing the life and performance of the magnetic disk. Of course, such problems are common to other coated recording media.
そこで、例えば磁気ディスク記録媒体の場合には、本出
願人が先に出願した特願昭５９−２７６１４８号（未公
知）で述べられたように媒体保護用の不織布に潤滑油を
含浸する方法や、スピンコ−ト法等によって媒体表面に
潤滑油の保護膜を形成することが行われている。For example, in the case of a magnetic disk recording medium, there is a method of impregnating lubricating oil into a nonwoven fabric for protecting the medium, as described in Japanese Patent Application No. 59-276148 (unknown) previously filed by the present applicant. A protective film of lubricating oil is formed on the surface of the medium by a spin coating method or the like.
ところが、上記のように磁気記録媒体の表面に潤滑油を
コーティングすると、しばしば磁気記録媒体と磁気ヘッ
ドどの間の相対移動が困難になることがあった。However, when the surface of the magnetic recording medium is coated with lubricating oil as described above, relative movement between the magnetic recording medium and the magnetic head often becomes difficult.
第２図は磁気ヘッドと磁気記録媒体との間の潤滑油の膜
厚を変化させた場合の摩擦係数の測定データである。一
般に乾固同士の接触の際には、その摩擦係数が最大でも
０．５程度であるが、図に示すように潤滑油が介在する
と、膜厚によってはこの値を大きく超えてしまう。この
ような場合には接触物同士に摩擦力以外のなんらかの力
が作用していることが考えられる。このような力には、
潤滑油の粘性による抵抗力や潤滑油の表面張力による吸
着力が考えられる。しかし、潤滑油の粘性力は通常、非
常に小さいため、ここでは潤滑油の表面張力による吸着
力に着目する必要がある。FIG. 2 shows measurement data of the coefficient of friction when the film thickness of the lubricating oil between the magnetic head and the magnetic recording medium is varied. Generally, when dry materials come into contact with each other, the friction coefficient is about 0.5 at most, but as shown in the figure, when lubricating oil is involved, this value can be greatly exceeded depending on the film thickness. In such a case, it is possible that some force other than frictional force is acting on the objects in contact. This kind of power has
Possible causes include resistance due to the viscosity of the lubricating oil and adsorption force due to the surface tension of the lubricating oil. However, since the viscous force of lubricating oil is usually very small, here it is necessary to focus on the adsorption force due to the surface tension of lubricating oil.
第３図は、吸着現象に関するデータであり、磁気ヘッド
と磁気記録媒体との間の潤滑油の表面張力を種々変化さ
せたときの結果である。この図か・ら明らかなように、
潤滑油の表面張力が大きくなればなるほど強力な吸着現
象が生じている。FIG. 3 shows data regarding the adsorption phenomenon, and shows the results obtained when the surface tension of the lubricating oil between the magnetic head and the magnetic recording medium was varied. As is clear from this figure,
The greater the surface tension of lubricating oil, the stronger the adsorption phenomenon occurs.
（発明が解決しようとする問題点）
このように、潤滑油を介して磁気記録媒体に接触する従
来の磁気ヘッドにおいては、磁気記録媒体と磁気ヘッド
との間にしばしば吸着が起り、磁気記録媒体と磁気ヘッ
ドとの相対移動が困難になるという問題があった。(Problems to be Solved by the Invention) As described above, in the conventional magnetic head that contacts the magnetic recording medium through lubricating oil, adsorption often occurs between the magnetic recording medium and the magnetic head, and the magnetic recording medium There is a problem in that relative movement between the magnetic head and the magnetic head becomes difficult.
本発明は、このような潤滑油を介して磁気記録媒体と接
触する磁気ヘッドにあって、吸着現象を生じることのな
い磁気ヘッドを提供することを目的とする。An object of the present invention is to provide a magnetic head that contacts a magnetic recording medium via such lubricating oil and does not cause the attraction phenomenon.
［発明の構成］
（問題点を解決するための手段）
本発明は、磁気記録媒体の磁気記録媒体層動面にＢＮも
しくはＴｉＮ材をコーティングしたことを特徴としてい
る。[Structure of the Invention] (Means for Solving Problems) The present invention is characterized in that the moving surface of the magnetic recording medium layer of a magnetic recording medium is coated with BN or TiN material.
（作用）
一般に、上述したような吸着現象によって生じる吸着力
「は、
Ｆ−（２Δ・δ・ ＣＯＳθ）／ｈ
で示される。ここに、Δは潤滑油と磁気ヘッドの接触面
積、δは潤滑油の表面張力、θは磁気ヘッドに対する潤
滑油の濡れ角、ｈは磁気ヘッドと磁気記録媒体との間の
距離である。(Function) Generally, the adsorption force caused by the above-mentioned adsorption phenomenon is expressed as F-(2Δ・δ・COSθ)/h. Here, Δ is the contact area between the lubricating oil and the magnetic head, and δ is the lubrication force. The surface tension of the oil, θ is the wetting angle of the lubricating oil with respect to the magnetic head, and h is the distance between the magnetic head and the magnetic recording medium.
この式から明らかなように、吸着力Ｆを減少させるには
磁気ヘッドに対する潤滑油の濡れ角θを大きくすれば良
い。通常、この種の潤滑油にはフッ素系潤滑油が使用さ
れるため、磁気ヘッドの記録媒体接触部にフッ素系１１
ｔ！ｌ滑油の濡れ性の悪い材料を用いれば良い。ＢＮ、
ＴｉＮは、フッ素系潤滑油に対し濡れ性が悪い。本発明
では、これらの材料を磁気ヘッドにコーティングしてい
るので、吸着力Ｆが抑制される。As is clear from this equation, the adsorption force F can be reduced by increasing the wetting angle θ of the lubricating oil with respect to the magnetic head. Normally, fluorine-based lubricating oil is used for this type of lubricating oil, so fluorine-based lubricating oil
T! l A material that has poor wettability with lubricating oil may be used. BN,
TiN has poor wettability with fluorine-based lubricating oil. In the present invention, since the magnetic head is coated with these materials, the attraction force F is suppressed.
（実施例）
以下、図面を参照しながら、本発明の一実施例について
説明する。(Example) Hereinafter, an example of the present invention will be described with reference to the drawings.
第１図は片面ヘッドのフロッピーディスク装置に本発明
を適用した例を示す図である。円板状の磁気記録媒体１
の下面には、曲率半径が例えば５ＯＮＲで空気軸受に支
持された移動自在の磁気ヘッド２が当接されている。磁
気記録媒体１を介して上記磁気ヘッド２と対向する位置
には、フェルトバッド３が配設されている。FIG. 1 is a diagram showing an example in which the present invention is applied to a floppy disk device with a single-sided head. Disc-shaped magnetic recording medium 1
A movable magnetic head 2 having a radius of curvature of, for example, 5 ONR and supported by an air bearing is in contact with the lower surface of the head. A felt pad 3 is provided at a position facing the magnetic head 2 with the magnetic recording medium 1 in between.
磁気記録媒体１は、例えば可撓性樹脂フィルムからなる
基体の上にｃｏ−ｃｒ金属薄膜の記録磁性層を形成し、
この記録磁性層の上に５ｉａＮ４からなる保護層を形成
し、さらに上記保護層の上にフッ素系のｆｌ！油を、例
えばスピンコードによって形成したものである。The magnetic recording medium 1 has a recording magnetic layer made of a co-cr metal thin film formed on a base made of, for example, a flexible resin film,
A protective layer made of 5iaN4 is formed on this recording magnetic layer, and a fluorine-based fl! The oil is formed by, for example, a spin cord.
磁気ヘッド２は、フェライト母材の摺動面にＢＮ（窒化
ボロン）を例えばスパッタリングによりコーティングし
たものである。The magnetic head 2 has a sliding surface of a ferrite base material coated with BN (boron nitride), for example, by sputtering.
以上の構成のフロッピーディスクにおいて、磁気記録媒
体１上にフッ素光ｆｌｌ滑油を介して磁気ヘッド２を接
触させ、磁気記録媒体１を回転・停止を繰返したところ
、吸着現象は生じないことが確認できた。In the floppy disk with the above configuration, when the magnetic head 2 was brought into contact with the magnetic recording medium 1 via a fluorine beam lubricant and the magnetic recording medium 1 was repeatedly rotated and stopped, it was confirmed that no adhesion phenomenon occurred. did it.
ところで、従来は、磁気記録媒体１の
−〇−
Ｓ ｉａ Ｎ４の保護層と、磁気ヘッドであるフェライ
ト表面との間にフッ素系潤滑油が介在していた。By the way, conventionally, a fluorine-based lubricating oil has been interposed between the -0- Sia N4 protective layer of the magnetic recording medium 1 and the ferrite surface of the magnetic head.
フェライトとＳｉ３Ｎ４とをフッ素系潤滑油の濡れ性に
ついて比べると、Ｓｉ３Ｎ＋の方が悪い。When ferrite and Si3N4 are compared in terms of wettability with fluorine-based lubricating oil, Si3N+ is worse.
従って磁気ヘッド側のフェライト表面の濡れ性を悪化さ
せた方が吸着力排除という面から見て効果がある。第４
図は磁気ヘッドのコーティング材料として考えられるも
のについてフッ素系潤滑油の濡れ性を、濡れ広がり速度
の面から調査した結果である。この図から明らかなよう
に、ＢＮ。Therefore, it is more effective to reduce the wettability of the ferrite surface on the magnetic head side in terms of eliminating the attraction force. Fourth
The figure shows the results of investigating the wettability of fluorine-based lubricating oil, which is considered as a coating material for magnetic heads, from the perspective of wetting and spreading speed. As is clear from this figure, BN.
ＴｉＮ（窒化チタン〉は、フェライトよりも濡れ性が悪
いＳｉ：＋Ｎ＋よりも更に濡れ性が悪い。したがって、
これらの材料をコーテイング材として使用することによ
り吸着現象は効果的に防止できる。TiN (titanium nitride) has worse wettability than Si: +N+, which has worse wettability than ferrite. Therefore,
Adsorption phenomena can be effectively prevented by using these materials as coating materials.
なお、磁気ヘッドへのＢＮ、ＴｉＮのコーティングは、
特にスパッタリングに限らず、蒸着等信の方法によって
も良い。また、磁気記録媒体は特に金属磁性薄膜磁気デ
ィスク媒体に限定されるものではなく、塗布型磁気記録
媒体、磁気テープへの適用も可能であることは言うまで
もない。The coating of BN and TiN on the magnetic head is as follows:
In particular, the method is not limited to sputtering, but may also be a method such as vapor deposition. Further, the magnetic recording medium is not particularly limited to a metal magnetic thin film magnetic disk medium, and it goes without saying that application to coated magnetic recording media and magnetic tapes is also possible.
［発明の効果］
以上のように本発明によれば、磁気ヘッドの摺動面のフ
ッ素系潤滑油に対する濡れ性を低下させることができる
ので、磁気ヘッドと磁気記録媒体との間の吸着を効果的
に防止することができる。[Effects of the Invention] As described above, according to the present invention, it is possible to reduce the wettability of the sliding surface of the magnetic head to fluorine-based lubricating oil, thereby effectively reducing the adhesion between the magnetic head and the magnetic recording medium. can be prevented.
第１図は本発明の一実施例に係るフロッピーディスク装
置の一部を示す側面図、第２図は磁気ヘッドと磁気記録
媒体との間の潤滑油の油膜と摩擦係数との関係を示す図
、第３図は同潤滑油の表面張ツノと摩擦係数との関係を
示す図、第４図は磁気ヘッドの摺動面のコーテイング材
とフッ素系油の濡れ広がり速度との関係を示す図である
。
１・・・磁気記録媒体、２・・・磁気ヘッド、３・・・
フェルトパッド。FIG. 1 is a side view showing a part of a floppy disk device according to an embodiment of the present invention, and FIG. 2 is a diagram showing the relationship between the lubricating oil film and the coefficient of friction between the magnetic head and the magnetic recording medium. , Figure 3 is a diagram showing the relationship between the surface tension of the same lubricating oil and the coefficient of friction, and Figure 4 is a diagram showing the relationship between the coating material on the sliding surface of the magnetic head and the wetting and spreading speed of the fluorine-based oil. be. 1... Magnetic recording medium, 2... Magnetic head, 3...
felt pad.
Claims (1)
ッドにおいて、前記磁気記録媒体との接触面にＢＮもし
くはＴｉＮをコーティングしたことを特徴とする磁気ヘ
ッド。1. A magnetic head that contacts a magnetic recording medium via a fluorine-based lubricant, characterized in that a surface in contact with the magnetic recording medium is coated with BN or TiN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5310686A JPH06101095B2 (en) | 1986-03-11 | 1986-03-11 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5310686A JPH06101095B2 (en) | 1986-03-11 | 1986-03-11 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62209709A true JPS62209709A (en) | 1987-09-14 |
| JPH06101095B2 JPH06101095B2 (en) | 1994-12-12 |
Family
ID=12933537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5310686A Expired - Fee Related JPH06101095B2 (en) | 1986-03-11 | 1986-03-11 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06101095B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01311408A (en) * | 1988-06-09 | 1989-12-15 | Victor Co Of Japan Ltd | Magnetic head |
| JPH03160605A (en) * | 1989-11-17 | 1991-07-10 | Nissin Electric Co Ltd | Magnetic head and its production |
| JPH03290808A (en) * | 1990-04-06 | 1991-12-20 | Nissin Electric Co Ltd | Magnetic head |
-
1986
- 1986-03-11 JP JP5310686A patent/JPH06101095B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01311408A (en) * | 1988-06-09 | 1989-12-15 | Victor Co Of Japan Ltd | Magnetic head |
| JPH03160605A (en) * | 1989-11-17 | 1991-07-10 | Nissin Electric Co Ltd | Magnetic head and its production |
| JPH03290808A (en) * | 1990-04-06 | 1991-12-20 | Nissin Electric Co Ltd | Magnetic head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06101095B2 (en) | 1994-12-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3139323B2 (en) | Magnetic disk drive and slider | |
| JPS62209709A (en) | Magnetic head | |
| JP2743991B2 (en) | Magnetic recording / reproducing device | |
| JPS62109220A (en) | Magnetic recording medium | |
| EP0152744B1 (en) | Process for applying a lubricative and protective coating on a flexible magnetic recording medium | |
| US4689254A (en) | Magnetic recording element having a lubricative and protective coating | |
| JP2812212B2 (en) | Magnetic head | |
| JPS62192018A (en) | Magnetic head | |
| KR100370759B1 (en) | Disk device of hard disk drive | |
| JP2549577Y2 (en) | Floating head support | |
| JP2950266B2 (en) | Contact type magnetic head slider | |
| JPH0223517A (en) | Perpendicular magnetic recording medium | |
| JP2559501Y2 (en) | Floating head support | |
| JP2501516Y2 (en) | Floating head loading device | |
| JPH04212714A (en) | Magnetic recording medium | |
| JPH0388189A (en) | Magnetic disk device | |
| JP2695817B2 (en) | Magnetic recording media | |
| JP2001202617A (en) | Magnetic recording medium | |
| JPH01319128A (en) | Magnetic disk | |
| JPS62109221A (en) | Magnetic recording medium | |
| JPS61260481A (en) | Floating type magnetic head | |
| JPH0689523A (en) | Magnetic head and its production | |
| JPH01235025A (en) | Magnetic disk medium | |
| JPS63276712A (en) | Magnetic disk medium | |
| JPH04137219A (en) | Magnetic recording medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |