JPS62209708A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPS62209708A JPS62209708A JP5310586A JP5310586A JPS62209708A JP S62209708 A JPS62209708 A JP S62209708A JP 5310586 A JP5310586 A JP 5310586A JP 5310586 A JP5310586 A JP 5310586A JP S62209708 A JPS62209708 A JP S62209708A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic head
- recording medium
- magnetic recording
- 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.)
- Granted
Links
- 238000001179 sorption measurement Methods 0.000 abstract description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 12
- 239000000463 material Substances 0.000 abstract description 10
- 239000011248 coating agent Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 abstract description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- 229910052593 corundum Inorganic materials 0.000 abstract 3
- 229910001845 yogo sapphire Inorganic materials 0.000 abstract 3
- 230000000274 adsorptive effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 16
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000010408 film Substances 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 4
- 229910010271 silicon carbide Inorganic materials 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 229910005091 Si3N Inorganic materials 0.000 description 2
- 230000010365 information processing Effects 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 238000009736 wetting Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- MTPVUVINMAGMJL-UHFFFAOYSA-N trimethyl(1,1,2,2,2-pentafluoroethyl)silane Chemical compound C[Si](C)(C)C(F)(F)C(F)(F)F MTPVUVINMAGMJL-UHFFFAOYSA-N 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
録媒体と磁気ヘッドと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 in a TR or the like, and particularly relates to a magnetic head capable of preventing an attraction phenomenon between a magnetic recording medium and a magnetic head.
（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Ｇｏ−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、特に磁気記
録媒体の表面保護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保護が適切でな
いと、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。For this reason, magnetic recording media using metal thin films such as Go-Cr, which are suitable for increasing capacity, are also used. However, in magnetic recording media using such metal magnetic thin films, the surface of the magnetic recording medium is Protection becomes a key 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 of the magnetic disk is not properly protected, there is a problem in that wear progresses and the life and performance of the magnetic disk decreases.
そこで、表面に例えば３ｉ３Ｎ＋の保護層を設けた磁気
記録媒体も開発されている。Therefore, magnetic recording media having a protective layer of, for example, 3i3N+ on the surface have also been developed.
ところで、磁気記録媒体の表面に直接磁気ヘッドが接触
する場合、しばしば磁気記録媒体と磁気ヘッドとの間の
相対移動が困難になることがあった。By the way, when a magnetic head comes into direct contact with the surface of a magnetic recording medium, relative movement between the magnetic recording medium and the magnetic head is often difficult.
以下、この現象について説明する。This phenomenon will be explained below.
第２図は磁気ヘッドと磁気記録媒体との間に液体（ｆｉ
ｌｌｌ油）を介在させ、こ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
に示すように液体が介在すると、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、液体の粘性による抵抗力や
液体の表面張力による吸着力が考えられる。しかし、液
体の粘性力は通常、非常に小さいため、ここでは液体の
表面張力による吸着力に着目する必要がある。Figure 2 shows a liquid (fi) between the magnetic head and the magnetic recording medium.
This is the measurement data of the coefficient of friction when the film thickness was changed by intervening 1ll oil). Generally, when dry and solid materials come into contact with each other, the friction coefficient is approximately 0.5 at most, but as shown in the figure, when a liquid 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. Such forces may include a resistance force due to the viscosity of the liquid and an adsorption force due to the surface tension of the liquid. However, since the viscous force of a liquid is usually very small, here it is necessary to focus on the adsorption force due to the surface tension of the liquid.
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液体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、液体
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。液体が水である場合、その表面張力は７３
ｄｙｎｅ／ ｃａｒであるから非常に大きな吸着を起こ
す。FIG. 3 shows data regarding the adsorption phenomenon, and shows the results obtained when the surface tension of the liquid between the magnetic head and the magnetic recording medium was varied. As is clear from this figure, the greater the surface tension of the liquid, the stronger the adsorption phenomenon occurs. If the liquid is water, its surface tension is 73
Since it is dyne/car, it causes very large adsorption.
以上の結果から、上記の現象は、磁気ヘッドと磁気記録
媒体との間に付着した水分による吸着力によって引起こ
されることが理解できる。しかし、磁気ヘッドや磁気記
録媒体表面から完全に水分を取除くのは、周囲の湿度、
潤度的な要因からかなり困難である。From the above results, it can be understood that the above phenomenon is caused by the adsorption force due to moisture adhering between the magnetic head and the magnetic recording medium. However, it is difficult to completely remove moisture from the surface of the magnetic head or magnetic recording medium due to the ambient humidity.
This is quite difficult due to moisture factors.
（発明が解決しようとする問題点）
このように、磁気記録媒体に直接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付
着した水分の影響で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 conventional magnetic heads that come into direct contact with the magnetic recording medium, adsorption often occurs due to the influence of moisture adhering between the magnetic recording medium and the magnetic head. There has been a problem in that relative movement between the recording medium and the magnetic head becomes difficult.
本発明は、磁気記録媒体と直接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。SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head that is in direct contact with a magnetic recording medium and does not cause an attraction phenomenon.
［発明の構成］
（問題点を解決するｌ〔めの手段）
本発明は、磁気記録媒体の磁気記録媒体摺動面にＡり２
０ａ、ＴｉＣ若しくはＳｉＣ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 the Problems) The present invention provides an A2 on the magnetic recording medium sliding surface of a magnetic recording medium.
It is characterized by being coated with 0a, TiC or SiC material.
（作用）
一般に、液体が介在した場合の吸＠坦象によって生じる
吸着力Ｆは、
Ｆ＝ （２Ａ・δ・ ｃｏｓθ）／ｈ
で示される。ここに、Ａは液体と磁気ヘッドの接触面積
、δは液体の表面張力、θは磁気ヘッドに対する液体の
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 F generated by the adsorption phenomenon when a liquid is present is expressed as F=(2A·δ·cosθ)/h. Here, A is the contact area between the liquid and the magnetic head, δ is the surface tension of the liquid, θ is the wetting angle of the liquid 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液体の濡れ角θを大きくすれば良い
。ここで問題としているのは水であるから、水の濡れ性
の悪い材料を用いれば良い。As is clear from this equation, the adsorption force F can be reduced by increasing the wetting angle θ of the liquid with respect to the magnetic head. Since the issue here is water, a material that is poorly wetted by water may be used.
Ａ℃２０３ 、ＴｉＣ，ＳｉＣは、水に対し濡れ性が悪
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。A°C 203, TiC, and SiC have poor wettability with water. 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ｌｆｌ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５０＃ＩＩＩ＋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、フェルトパッド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 lfl with a single-sided head. A movable magnetic head 2 having a radius of curvature of, for example, 50#III+ and supported by an air bearing is in contact with the lower surface of the disc-shaped magnetic recording medium 1. 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Ｇｏ−Ｏｒ金属薄膜の記録磁性層を形成し、
この記録磁性層の上にＳｉ３Ｎ＋からなる保ｌＩ層を形
成したものである。The magnetic recording medium 1 has a recording magnetic layer of a Go-Or metal thin film formed on a substrate made of, for example, a flexible resin film,
A holding layer made of Si3N+ is formed on this recording magnetic layer.
磁気ヘッド２は、フェライト母材の摺動面にＡ１２０ａ
＜酸化アルミ）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 A120a on the sliding surface of the ferrite base material.
<aluminum oxide) coated by sputtering, for example.
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 having the above configuration, when the magnetic head 2 was brought into contact with the magnetic recording medium 1 and the magnetic recording medium 1 was repeatedly rotated and stopped, it was confirmed that no attraction phenomenon occurred.
ところで、従来は、磁気記録媒体１の
５１３Ｎ４の保ｉ！層と、磁気ヘッドであるフェライト
表面との間に水が介在することにより吸着現象が生じて
いた。フェライトと５ｉａＮ４と水の濡れ性について比
べると、Ｓｉ３Ｎ＋の方が悪い。By the way, conventionally, the maintenance i! of 513N4 of the magnetic recording medium 1 has been proposed. An adsorption phenomenon occurs due to the presence of water between the layer and the ferrite surface of the magnetic head. When comparing ferrite and 5iaN4 in terms of water wettability, 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
のについて水の濡れ性を、水の接触角から調査した結果
である。この図から明らかなように、Ａｇ２Ｏ３、Ｔｉ
Ｃ（炭化チタン）及び５ｉＣ（炭化シリコン）は、フェ
ライトよりも濡れ性が悪い５ｉａＮ＋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ＭＵＭ象は効果的に防止でき
る。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 water wettability of potential coating materials for magnetic heads based on the contact angle of water. As is clear from this figure, Ag2O3, Ti
C (titanium carbide) and 5iC (silicon carbide) have even worse wettability than 5iaN+, which has worse wettability than ferrite. Therefore, by using these materials as a coating material, the MUM absorption phenomenon can be effectively prevented.
なお、磁気ヘッドへのＡρ２０３．Ｔｉｃ及びＳｉＣの
コーティングは、特にスパッタリングに限らず、蒸着等
地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。Note that Aρ203. The coating of Tic and SiC is not limited to sputtering, but may also be performed by other methods 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水
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 water, thereby effectively preventing adhesion between the magnetic head and the magnetic recording medium. can do.
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
媒体との間の液体の液膜と摩擦係数との関係を示す図、
第３図は同液体の表面張力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水の
接触角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 a liquid film and a coefficient of friction between a magnetic head and a magnetic recording medium. ,
FIG. 3 is a diagram showing the relationship between the surface tension and friction coefficient of the liquid, and FIG. 4 is a diagram showing the relationship between the contact angle of water and the coating material on the sliding surface of the magnetic head. 1... Magnetic recording medium, 2... Magnetic head, 3...
felt pad.
Claims (1)
くはＳｉＣをコーティングしてなる磁気ヘッド。A magnetic head whose contact surface with a magnetic recording medium is coated with Al_2O_3, TiC, or SiC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61053105A JP2743991B2 (en) | 1986-03-11 | 1986-03-11 | Magnetic recording / reproducing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61053105A JP2743991B2 (en) | 1986-03-11 | 1986-03-11 | Magnetic recording / reproducing device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62209708A true JPS62209708A (en) | 1987-09-14 |
| JP2743991B2 JP2743991B2 (en) | 1998-04-28 |
Family
ID=12933507
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61053105A Expired - Fee Related JP2743991B2 (en) | 1986-03-11 | 1986-03-11 | Magnetic recording / reproducing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2743991B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01311408A (en) * | 1988-06-09 | 1989-12-15 | Victor Co Of Japan Ltd | Magnetic head |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5683829A (en) * | 1979-12-11 | 1981-07-08 | Mitsubishi Electric Corp | Magnetic head |
| JPS5798121A (en) * | 1980-12-08 | 1982-06-18 | Hitachi Metals Ltd | Magnetic head |
| JPS57179934A (en) * | 1981-04-30 | 1982-11-05 | Canon Inc | Magnetoresistance effect type reproducing head |
| JPS58176214U (en) * | 1982-05-19 | 1983-11-25 | 株式会社日立製作所 | magnetic head |
-
1986
- 1986-03-11 JP JP61053105A patent/JP2743991B2/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5683829A (en) * | 1979-12-11 | 1981-07-08 | Mitsubishi Electric Corp | Magnetic head |
| JPS5798121A (en) * | 1980-12-08 | 1982-06-18 | Hitachi Metals Ltd | Magnetic head |
| JPS57179934A (en) * | 1981-04-30 | 1982-11-05 | Canon Inc | Magnetoresistance effect type reproducing head |
| JPS58176214U (en) * | 1982-05-19 | 1983-11-25 | 株式会社日立製作所 | magnetic head |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01311408A (en) * | 1988-06-09 | 1989-12-15 | Victor Co Of Japan Ltd | Magnetic head |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2743991B2 (en) | 1998-04-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |