JPH04258805A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPH04258805A JPH04258805A JP4046291A JP4046291A JPH04258805A JP H04258805 A JPH04258805 A JP H04258805A JP 4046291 A JP4046291 A JP 4046291A JP 4046291 A JP4046291 A JP 4046291A JP H04258805 A JPH04258805 A JP H04258805A
- Authority
- JP
- Japan
- Prior art keywords
- pole
- magnetic head
- protective film
- carbon protective
- lubricant
- 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
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 22
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 22
- 230000001681 protective effect Effects 0.000 claims abstract description 22
- 239000000314 lubricant Substances 0.000 claims abstract description 21
- 229910000889 permalloy Inorganic materials 0.000 claims abstract description 14
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 13
- 239000000956 alloy Substances 0.000 claims abstract description 13
- 235000021355 Stearic acid Nutrition 0.000 claims description 2
- 229910052731 fluorine Inorganic materials 0.000 claims description 2
- 239000011737 fluorine Substances 0.000 claims description 2
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical group CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims description 2
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims description 2
- 239000008117 stearic acid Substances 0.000 claims description 2
- 125000001153 fluoro group Chemical group F* 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 16
- 230000006866 deterioration Effects 0.000 abstract description 14
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 230000035699 permeability Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 10
- 230000007423 decrease Effects 0.000 description 8
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は磁気記録装置の磁気ヘッ
ドに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic head for a magnetic recording device.
【０００２】0002
【従来の技術】従来、電子計算機の大容量外部記憶装置
である固定磁気ディスク装置では、磁気ヘッドは起動時
および停止時には磁気ディスク媒体に接触するが、それ
以外の通常の動作時には、その空気ベアリング機能によ
って磁気ディスク媒体から浮上している。ところで、こ
の磁気ヘッドが浮上する高さは、磁気ディスク装置の記
録密度を上げるためには低くする必要があり、磁気ディ
スク装置の高密度化に伴い、近年ますます低く抑えられ
る傾向にある。2. Description of the Related Art Conventionally, in fixed magnetic disk drives, which are large-capacity external storage devices for electronic computers, the magnetic head comes into contact with the magnetic disk medium when starting up and stopping, but during other normal operations, the magnetic head comes into contact with the magnetic disk medium. The function is that it is lifted from the magnetic disk medium. Incidentally, the flying height of this magnetic head needs to be lowered in order to increase the recording density of a magnetic disk device, and there has been a trend in recent years to keep the height lower than ever as the density of magnetic disk devices increases.
【０００３】また、記録密度をさらに高める方法として
、動作時においても磁気ヘッドを磁気ディスク媒体に完
全に接触させて記録・再生を行うコンタクト・レコーデ
ィング方式が用いられている。Further, as a method for further increasing the recording density, a contact recording method is used in which recording and reproduction are performed by keeping the magnetic head in complete contact with the magnetic disk medium even during operation.
【０００４】0004
【発明が解決しようとする課題】しかし、コンタクト・
レコーディング方式を用いた場合、従来の磁気ヘッドは
そのポールがビッカス硬さが１３２のパーマロイで形成
されているので、摺動によってポールが摩耗し易く、電
磁変換特性がすぐに劣化してしまうという問題がある。[Problem to be solved by the invention] However, contact
When using the recording method, the poles of conventional magnetic heads are made of permalloy with a Vickers hardness of 132, which causes the poles to easily wear out due to sliding, resulting in the electromagnetic conversion characteristics quickly deteriorating. There is.
【０００５】本発明の目的は、このような問題を解決し
、ポールの耐摩耗性を向上させて電磁変換特性の劣化を
抑制した磁気ヘッドを提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic head that solves these problems, improves the wear resistance of the poles, and suppresses deterioration of electromagnetic conversion characteristics.
【０００６】[0006]
【課題を解決するための手段】第１の発明は、ヘッドエ
レメントにポールを有する磁気ヘッドにおいて、前記ポ
ールをパーマロイ合金体で形成し、その先端部にカーボ
ン保護膜を設けたことを特徴とする。[Means for Solving the Problems] A first invention is a magnetic head having a pole in a head element, characterized in that the pole is formed of a permalloy alloy body, and a carbon protective film is provided at the tip thereof. .
【０００７】第２の発明は、ヘッドエレメントにポール
を有する磁気ヘッドにおいて、前記ポールをパーマロイ
合金体で形成し、その先端部にカーボン保護膜を設け、
その上に潤滑剤を塗布したことを特徴とする。[0007] A second invention is a magnetic head having a pole in the head element, in which the pole is formed of a permalloy alloy, and a carbon protective film is provided at the tip thereof,
It is characterized by having a lubricant applied thereon.
【０００８】[0008]
【作用】第１の発明による磁気ヘッドでは、そのヘッド
エレメントのポールをパーマロイ合金で形成し、その先
端部にカーボン保護膜を設けたので、ポールの摩耗は抑
えられ、磁気ヘッドの電磁変換特性の劣化は大幅に抑制
される。例えばその膜厚を４０〜５０オングストローム
とすると、摺動パス回数が７０×１０５回まで再生出力
は低下せず、コンタクト・レコーディング方式を採用し
ても３年程度は電磁変換特性の劣化なしに動作する。[Operation] In the magnetic head according to the first invention, the pole of the head element is formed of permalloy alloy, and a carbon protective film is provided on the tip of the pole, so that wear of the pole is suppressed and the electromagnetic conversion characteristics of the magnetic head are improved. Deterioration is significantly suppressed. For example, if the film thickness is 40 to 50 angstroms, the playback output will not decrease until the number of sliding passes is 70 x 105, and even if the contact recording method is adopted, the electromagnetic conversion characteristics will continue to operate for about 3 years without deterioration. do.
【０００９】また、第２の発明による磁気ヘッドでは、
そのヘッドエレメントのポールをパーマロイ合金で形成
し、その先端部にカーボン保護膜を設け、さらにその上
に潤滑剤を塗布したので、ポールの摩耗は一層、抑えら
れ、磁気ヘッドの電磁変換特性の劣化はさらに大幅に抑
制される。例えばカーボン保護膜の膜厚を４０〜５０オ
ングストローム、潤滑剤の膜厚を５〜１０オングストロ
ームとすると、摺動パス回数が１４０×１０５回まで再
生出力は低下せず、コンタクト・レコーディング方式を
採用しても５年程度は電磁変換特性の劣化なしに動作す
る。Furthermore, in the magnetic head according to the second invention,
The pole of the head element is made of permalloy alloy, a carbon protective film is provided on the tip, and a lubricant is applied on top of the pole, further suppressing the wear of the pole and deterioration of the electromagnetic conversion characteristics of the magnetic head. will be further suppressed. For example, if the thickness of the carbon protective film is 40 to 50 angstroms and the thickness of the lubricant is 5 to 10 angstroms, the playback output will not decrease until the number of sliding passes is 140 x 105, and the contact recording method will be used. It can operate for about 5 years without deterioration of electromagnetic conversion characteristics.
【００１０】0010
【実施例】次に本発明の実施例について説明する。図２
は本発明による磁気ヘッドＡの平面図であり、磁気ヘッ
ドＡのヘッドエレメント１のＩ−Ｉ断面図を図１に示す
。ヘッドエレメント１は、例えばアルミナなどの材料で
形成され、その内部には高透磁率金属膜からなるポール
２が埋設されている。このポール２はパーマロイ合金体
３、カーボン保護膜４、ならびに潤滑剤膜５によって構
成され、カーボン保護膜４はパーマロイ合金体３の先端
部に形成され、潤滑剤膜５はさらにカーボン保護膜４の
上に塗布されている。そしてポール２の先端部はヘッド
エレメント１のギャップ表面に露呈し、かつギャップ表
面から突出している。このようにポール２の先端部を突
出させることにより、電磁変換特性を一層向上させるこ
とが可能となる。なお、潤滑剤膜５を形成する潤滑剤と
しては、フッソ系パーフェロロポリエーテルやステアリ
ン酸系の潤滑剤などが適している。[Example] Next, an example of the present invention will be described. Figure 2
1 is a plan view of a magnetic head A according to the present invention, and a cross-sectional view taken along line II of a head element 1 of the magnetic head A is shown in FIG. The head element 1 is made of a material such as alumina, and has a pole 2 made of a high magnetic permeability metal film embedded therein. This pole 2 is composed of a permalloy alloy body 3, a carbon protective film 4, and a lubricant film 5. The carbon protective film 4 is formed on the tip of the permalloy alloy body 3, and the lubricant film 5 is further formed on the carbon protective film 4. coated on top. The tip of the pole 2 is exposed to the gap surface of the head element 1 and protrudes from the gap surface. By protruding the tip of the pole 2 in this manner, it is possible to further improve the electromagnetic conversion characteristics. Note that, as the lubricant for forming the lubricant film 5, fluorine-based perferrolopolyether, stearic acid-based lubricant, etc. are suitable.
【００１１】以上のように構成された磁気ヘッドは、ポ
ールの先端部にカーボン保護膜４と、さらに潤滑剤膜５
とが設けられているので、コンタクト・レコーディング
方式を採用して磁気ヘッドを長時間磁気ディスク媒体上
を摺動させても、ポール２は容易には摩耗せず、磁気ヘ
ッドの電磁変換特性の劣化は大幅に抑制される。The magnetic head constructed as described above has a carbon protective film 4 and a lubricant film 5 on the tip of the pole.
Therefore, even if the contact recording method is adopted and the magnetic head is slid over a magnetic disk medium for a long time, the pole 2 will not be easily worn out and the electromagnetic conversion characteristics of the magnetic head will not deteriorate. is significantly suppressed.
【００１２】カーボン保護膜４の膜厚を４０〜５０オン
グストロームとし、潤滑剤膜５の膜厚を５〜１０オング
ストロームとした場合、摺動による劣化がどの程度にな
るかを実験的に調べた結果を図３のグラフに示す。グラ
フの横軸は摺動パス回数を表し、縦軸は磁気ヘッドの再
生出力電圧が摺動パス回数の増加に伴い初期電圧の何パ
ーセントに低下するかを表している。また、円でプロッ
トした曲線がポールの先端部にカーボン保護膜４を設け
、さらにその上に潤滑剤膜５を設けた第２の発明による
磁気ヘッドの場合を示し、斜線の楕円でプロットした曲
線はポールの先端部にカーボン保護膜４だけを設けた第
１の発明による磁気ヘッドの場合を、そして塗りつぶし
た楕円でプロットした曲線は従来の磁気ヘッドの場合を
それぞれ示している。このグラフからわかるように、第
２の発明の磁気ヘッドでは、摺動パス回数が１４０×１
０５回まで再生出力は低下せず、この性能によればコン
タクト・レコーディング方式を採用しても５年程度は電
磁変換特性の劣化なしに動作する。また、第１の発明の
磁気ヘッドでは、摺動パス回数が７０×１０５回まで再
生出力は低下せず、この性能によればコンタクト・レコ
ーディング方式を採用しても３年程度は電磁変換特性の
劣化なしに動作する。それに比べて従来の磁気ヘッドで
は、摺動パス回数が２０×１０５回で再生出力はすでに
減少し始め、１００×１０５回では再生出力は０になっ
ている。[0012] Results of an experimental study to determine the degree of deterioration due to sliding when the carbon protective film 4 has a thickness of 40 to 50 angstroms and the lubricant film 5 has a thickness of 5 to 10 angstroms. is shown in the graph of Figure 3. The horizontal axis of the graph represents the number of sliding passes, and the vertical axis represents the percentage of the initial voltage to which the reproduction output voltage of the magnetic head decreases as the number of sliding passes increases. Further, the curve plotted as a circle represents the case of the magnetic head according to the second invention in which a carbon protective film 4 is provided at the tip of the pole and a lubricant film 5 is further provided thereon, and the curve plotted as a diagonally shaded ellipse. shows the case of the magnetic head according to the first invention in which only the carbon protective film 4 is provided at the tip of the pole, and the curve plotted with a filled ellipse shows the case of the conventional magnetic head. As can be seen from this graph, in the magnetic head of the second invention, the number of sliding passes is 140×1.
The playback output does not decrease until 05 times, and based on this performance, even if the contact recording method is adopted, it will operate for about 5 years without deterioration of the electromagnetic conversion characteristics. In addition, in the magnetic head of the first invention, the reproduction output does not decrease until the number of sliding passes is 70 x 105, and according to this performance, even if the contact recording method is adopted, the electromagnetic conversion characteristics will change for about 3 years. Operates without deterioration. In contrast, in the conventional magnetic head, the reproduction output already begins to decrease after the number of sliding passes is 20×10 5 , and reaches 0 after 100×10 5 .
【００１３】[0013]
【発明の効果】以上説明したように、第１の発明による
磁気ヘッドでは、そのヘッドエレメントのポールをパー
マロイ合金で形成し、その先端部にカーボン保護膜を設
けたので、ポールの摩耗は抑えられ、磁気ヘッドの電磁
変換特性の劣化は大幅に抑制される。例えばその膜厚を
４０〜５０オングストロームとすると、摺動パス回数が
７０×１０５回まで再生出力は低下せず、コンタクト・
レコーディング方式を採用しても３年程度は電磁変換特
性の劣化なしに動作する。[Effects of the Invention] As explained above, in the magnetic head according to the first invention, the pole of the head element is formed of a permalloy alloy, and a carbon protective film is provided on the tip of the pole, so that wear of the pole can be suppressed. , deterioration of the electromagnetic conversion characteristics of the magnetic head is significantly suppressed. For example, if the film thickness is 40 to 50 angstroms, the reproduction output will not decrease until the number of sliding passes is 70 x 105, and the contact
Even if the recording method is adopted, it will operate for about three years without deterioration of electromagnetic conversion characteristics.
【００１４】また、第２の発明による磁気ヘッドでは、
そのヘッドエレメントのポールをパーマロイ合金で形成
し、その先端部にカーボン保護膜を設け、さらにその上
に潤滑剤を塗布したので、ポールの摩耗は一層、抑えら
れ、磁気ヘッドの電磁変換特性の劣化はさらに大幅に抑
制される。例えばカーボン保護膜の膜厚を４０〜５０オ
ングストローム、潤滑剤の膜厚を５〜１０オングストロ
ームとすると、摺動パス回数が１４０×１０５回まで再
生出力は低下せず、コンタクト・レコーディング方式を
採用しても５年程度は電磁変換特性の劣化なしに動作す
る。Further, in the magnetic head according to the second invention,
The pole of the head element is made of permalloy alloy, a carbon protective film is provided on the tip, and a lubricant is applied on top of the pole, further suppressing the wear of the pole and deterioration of the electromagnetic conversion characteristics of the magnetic head. will be further suppressed. For example, if the thickness of the carbon protective film is 40 to 50 angstroms and the thickness of the lubricant is 5 to 10 angstroms, the playback output will not decrease until the number of sliding passes is 140 x 105, and the contact recording method will be used. It can operate for about 5 years without deterioration of electromagnetic conversion characteristics.
【図１】本発明による磁気ヘッドの一例を示し、特にヘ
ッドエレメント部を示す断面図である。FIG. 1 is a sectional view showing an example of a magnetic head according to the present invention, particularly showing a head element portion.
【図２】図１の磁気ヘッドの平面図である。FIG. 2 is a plan view of the magnetic head of FIG. 1;
【図３】図１の磁気ヘッドの特性を示すグラフである。FIG. 3 is a graph showing the characteristics of the magnetic head in FIG. 1;
１ ヘッドエレメント ２ ポール ３ パーマロイ合金体 ４ カーボン保護膜 ５ 潤滑剤膜 Ａ 磁気ヘッド 1 Head element 2 Paul 3 Permalloy alloy body 4 Carbon protective film 5 Lubricant film A Magnetic head
Claims (4)
ッドにおいて、前記ポールをパーマロイ合金体で形成し
、その先端部にカーボン保護膜を設けたことを特徴とす
る磁気ヘッド。1. A magnetic head having a pole in a head element, characterized in that the pole is made of a permalloy alloy and a carbon protective film is provided on the tip thereof.
ッドにおいて、前記ポールをパーマロイ合金体で形成し
、その先端部にカーボン保護膜を設け、その上に潤滑剤
を塗布したことを特徴とする磁気ヘッド。2. A magnetic head having a pole in a head element, characterized in that the pole is formed of a permalloy alloy, a carbon protective film is provided at the tip thereof, and a lubricant is applied thereon. .
ーテルであることを特徴とする請求項２に記載の磁気ヘ
ッド。3. The magnetic head according to claim 2, wherein the lubricant is a fluorine-based perferrolopolyether.
ることを特徴とする請求項２に記載の磁気ヘッド。4. The magnetic head according to claim 2, wherein the lubricant is a stearic acid-based lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4046291A JPH04258805A (en) | 1991-02-13 | 1991-02-13 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4046291A JPH04258805A (en) | 1991-02-13 | 1991-02-13 | Magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04258805A true JPH04258805A (en) | 1992-09-14 |
Family
ID=12581310
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4046291A Pending JPH04258805A (en) | 1991-02-13 | 1991-02-13 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04258805A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06301930A (en) * | 1993-03-25 | 1994-10-28 | Internatl Business Mach Corp <Ibm> | Touch recording type diskfile with improved head assembly |
| US6219200B1 (en) * | 1993-06-29 | 2001-04-17 | Hitachi, Ltd. | Thin film magnetic head with air bearing end face of magnetic film protruding beyond air bearing end face of substrate |
| US6271994B1 (en) * | 1997-10-01 | 2001-08-07 | Alps Electric Co., Ltd. | Magnetic head having a thin film element |
-
1991
- 1991-02-13 JP JP4046291A patent/JPH04258805A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06301930A (en) * | 1993-03-25 | 1994-10-28 | Internatl Business Mach Corp <Ibm> | Touch recording type diskfile with improved head assembly |
| US6219200B1 (en) * | 1993-06-29 | 2001-04-17 | Hitachi, Ltd. | Thin film magnetic head with air bearing end face of magnetic film protruding beyond air bearing end face of substrate |
| US6271994B1 (en) * | 1997-10-01 | 2001-08-07 | Alps Electric Co., Ltd. | Magnetic head having a thin film element |
| US6404592B1 (en) | 1997-10-01 | 2002-06-11 | Alps Electric Co., Ltd. | Magnetic head producing method |
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