JPH0152812B2 - - Google Patents
Info
- Publication number
- JPH0152812B2 JPH0152812B2 JP13195881A JP13195881A JPH0152812B2 JP H0152812 B2 JPH0152812 B2 JP H0152812B2 JP 13195881 A JP13195881 A JP 13195881A JP 13195881 A JP13195881 A JP 13195881A JP H0152812 B2 JPH0152812 B2 JP H0152812B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- main
- head
- medium
- wear
- 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.)
- Expired
Links
- 239000000463 material Substances 0.000 claims description 19
- 230000005415 magnetization Effects 0.000 claims description 11
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 9
- 239000010409 thin film Substances 0.000 claims description 5
- 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 claims description 5
- 230000035699 permeability Effects 0.000 claims description 4
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 description 5
- 229910002113 barium titanate Inorganic materials 0.000 description 5
- 239000011651 chromium Substances 0.000 description 5
- 239000010408 film Substances 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000010936 titanium Substances 0.000 description 3
- 229910052719 titanium Inorganic materials 0.000 description 3
- 229910000684 Cobalt-chrome Inorganic materials 0.000 description 2
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical compound [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 2
- 239000010952 cobalt-chrome Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
- MUJOIMFVNIBMKC-UHFFFAOYSA-N fludioxonil Chemical compound C=12OC(F)(F)OC2=CC=CC=1C1=CNC=C1C#N MUJOIMFVNIBMKC-UHFFFAOYSA-N 0.000 description 2
- 229910052594 sapphire Inorganic materials 0.000 description 2
- 239000010980 sapphire Substances 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920006267 polyester film Polymers 0.000 description 1
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
- G11B5/127—Structure or manufacture of heads, e.g. inductive
- G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Description
【発明の詳細な説明】
本発明は垂直磁化記録用の磁気ヘツドに関する
もので、その主磁極ヘツドの高透磁率磁性体薄膜
をはさむ支持材料を特定することにより磁気記録
媒体と磁気ヘツドが接触走行するときに、媒体及
び主磁極ヘツドの摩耗を少なくすることを目的と
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head for perpendicular magnetization recording, in which the magnetic recording medium and the magnetic head can be moved in contact with each other by specifying supporting materials that sandwich the high permeability magnetic thin film of the main pole head. The purpose is to reduce wear on the medium and the main magnetic pole head when
一般に磁気ヘツドと磁気記録媒体が一定な接触
圧で走行しながら情報の記録，再生を行なう磁気
記録装置においては、媒体摩耗、ヘツド摩耗を極
力少くするために色々な方法がとられている。た
とえば、塗布媒体に潤滑剤を混入させヘツドとの
すべり摩擦を減少させることや、媒体の表面研摩
により、表面性を向上させることが行なわれ、ま
たヘツドでは硬度の高いホツトプレスフエライ
ト、センダスト、単結晶フエライトなどを用いヘ
ツド摩耗の減少をはかつている。 In general, in magnetic recording devices in which information is recorded and reproduced while a magnetic head and a magnetic recording medium run with a constant contact pressure, various methods are used to minimize media wear and head wear. For example, lubricants are mixed into the coating medium to reduce the sliding friction with the head, and the surface of the medium is polished to improve surface properties. Crystal ferrite is used to reduce head wear.
また磁気デイスクや、フレキシブルデイスクの
ヘツドのように構造上フエライトコアを保持して
いる支持スライダもヘツド同様に摩耗や媒体に傷
を与えるので耐摩耗性の良い材料たとえばチタン
酸バリウムのようなセラミツクが用いられてい
る。以下垂直磁化記録の場合について具体的に説
明する。垂直磁化記録の磁気ヘツドは第１図に示
すように媒体１をはさんで上下に補助磁極２と主
磁極３が設けられる。補助磁極２には書き込みコ
イル４と読み出しコイル５が施してある。主磁極
３は高透磁率磁性体薄膜６を支持材７ではさんで
接着し主磁極３の先端と媒体１とは空隙ができな
いように接触される。従つて情報の記録、再生時
には媒体１と主磁極３が適当な接触圧と一定な相
対速度でこすられることになり、媒体１と主磁極
３先端は摩耗する。この様な摩耗は媒体の寿命を
短縮し、磁気記録装置の信頼性を低下させるばか
りでなく、高密度記録を行う上で大きな障害とな
るので、極力少くする必要がある。 In addition, support sliders that structurally hold ferrite cores, such as the heads of magnetic disks and flexible disks, can wear out and damage the media in the same way as the heads, so materials with good wear resistance, such as ceramics such as barium titanate, are recommended. It is used. The case of perpendicular magnetization recording will be specifically explained below. As shown in FIG. 1, a magnetic head for perpendicular magnetization recording has an auxiliary magnetic pole 2 and a main magnetic pole 3 placed above and below a medium 1 therebetween. A writing coil 4 and a reading coil 5 are provided on the auxiliary magnetic pole 2. The main magnetic pole 3 is bonded with a high permeability magnetic thin film 6 sandwiched between supporting materials 7, and the tip of the main magnetic pole 3 and the medium 1 are brought into contact with each other so that no air gap is formed. Therefore, when recording or reproducing information, the medium 1 and the main magnetic pole 3 are rubbed together with an appropriate contact pressure and a constant relative speed, and the tips of the medium 1 and the main magnetic pole 3 are worn out. Such wear not only shortens the life of the medium and lowers the reliability of the magnetic recording device, but also becomes a major hindrance to high-density recording, so it must be minimized as much as possible.
ところで垂直磁化記録媒体としてコバルト−ク
ロムのスパツタ膜を使用する場合、従来から支持
スライダー材としては、たとえばチタン酸バリウ
ムが用いられているが媒体摩耗が激しく更に主磁
極自身の摩耗が大きいという欠点がある。 By the way, when a sputtered cobalt-chromium film is used as a perpendicular magnetization recording medium, barium titanate, for example, has traditionally been used as the supporting slider material, but this has the drawback of severe media wear and, furthermore, large wear of the main pole itself. be.
本発明は主磁極サポート材としてアルミナ、チ
タンカーバイト多結晶焼結体を用いることにより
摩耗が極めて少ない垂直磁化記録用磁気ヘツドを
提供するものである。 The present invention provides a magnetic head for perpendicular magnetization recording with extremely low wear by using alumina and titanium carbide polycrystalline sintered bodies as the main pole support material.
以下コバルト・クロム膜を記録媒体とした本発
明の一実施例における垂直磁化記録用磁気ヘツド
について説明する。第２図に本発明の磁気ヘツ
ド、並びに他の材料を用いたときのヘツド走行距
離に対する媒体の相対摩耗量（任意値）の関係を
示す。 A magnetic head for perpendicular magnetization recording according to an embodiment of the present invention using a cobalt chromium film as a recording medium will be described below. FIG. 2 shows the relationship between the relative wear amount (arbitrary value) of the medium and the travel distance of the head when using the magnetic head of the present invention and other materials.
図は、ポリエステルフイルム上にパーマロイ薄
膜とCo−Cr薄膜のスパツタ膜を被着させた媒体
に各種の主磁極支持材で作られた主磁極ヘツドを
数グラム／mm2の接触圧で加圧し媒体とヘツドの相
対速度150cm／secで走行させ、その時に発生する
媒体のダメージを相対的に比較したものである。
第２図は実験結果の代表例を示す。図において(イ)
は主磁極支持材として、チタンカーバイド・アル
ミナ焼結体を用いた場合、(ロ)は非磁性焼結フエラ
イト、(ハ)はガラス、(ニ)はチタン酸バリウム、(ホ)は
サフアイアをそれぞれ用いた場合を示した。上記
実験から明らかなように、図において、本発明の
(イ)チタンカーバイト・アルミナ焼結体を用いた物
は、ヘツド走行距離が27Km以上においても媒体の
摩耗はゼロであり、それに比べて(ハ)ガラス、(ニ)チ
タン酸バリウム、(ホ)サフアイアを用いた物は、(ロ)
非磁性フエライトに比べて約２倍、摩耗が多く発
生する。ここで、各材料のビツカース硬度は、本
発明のチタンカーバイト・アルミナ焼結体は2000
〜2300、非磁性フエライトは600〜700、ガラスは
約500、チタン酸バリウムは約750、サフアイアは
約2500であり、その他図には示していないがアル
ミナは約1800である。上記実験結果から明らかな
ようにチタンカーバイト・アルミナ焼結体を磁気
ヘツドに用いると、他の材料を用いた時と比べて
Co−Cr媒体の摩耗量を極力少なくでき、その結
果、媒体へのダメージが少なく、その分磁気ヘツ
ドが損傷、並びに摩耗することも少ない。 The figure shows a medium in which a sputtered permalloy film and a Co-Cr thin film are deposited on a polyester film, and a main pole head made of various main pole support materials is pressed with a contact pressure of several grams/mm 2 . The media was run at a relative speed of 150 cm/sec between the media and the head, and the damage to the media that occurred during that time was compared.
Figure 2 shows a representative example of the experimental results. In the figure (a)
(b) is non-magnetic sintered ferrite, (c) is glass, (d) is barium titanate, and (e) is sapphire, respectively. The case where it is used is shown. As is clear from the above experiment, in the figure, the present invention
(a) Products using titanium carbide/alumina sintered bodies have zero wear on the media even when the head travels over 27km, compared to (c) glass, (d) barium titanate, and ) Items using saphire are (b)
Approximately twice as much wear occurs compared to non-magnetic ferrite. Here, the Bitkers hardness of each material is 2000 for the titanium carbide/alumina sintered body of the present invention.
-2300, non-magnetic ferrite is 600-700, glass is about 500, barium titanate is about 750, saphire is about 2500, and alumina is about 1800 although it is not shown in the figure. As is clear from the above experimental results, when a titanium carbide-alumina sintered body is used for a magnetic head, compared to when other materials are used,
The amount of wear on the Co--Cr medium can be minimized, resulting in less damage to the medium and, accordingly, less damage and wear to the magnetic head.
このようにチタンカーバイト−アルミナ焼結体
がCo−Cr膜に対して良好な結果が得られたのは
TiC−AlO3が(1)硬度が高いこと（ビツカーズ硬
度2000〜2300）(2)多結晶であること、(3)緻密であ
ること、の性質が主要因といえる。 The reason why the titanium carbide-alumina sintered body showed good results for the Co-Cr film is as follows.
The main factors can be said to be the following properties of TiC-AlO 3 : (1) high hardness (Bitzkers hardness 2000-2300), (2) polycrystalline, and (3) denseness.
すなわち、単に硬度が高いだけでは、サフアイ
ア単結晶の方がむしろ硬度が高いが、結果的には
Co−Cr媒体に傷を与えてしまうことになり、高
硬度材料は必ずしも良くない。 In other words, in terms of just high hardness, sapphire single crystal is actually higher in hardness, but as a result,
High hardness materials are not necessarily good as they will damage the Co-Cr medium.
本発明の主磁極支持材としては、少なくとも媒
体と接する部分が、チタンカーバイド・アルミナ
焼結体であれば良く、表面が焼結体で他の部分が
非磁性体である２層構造であつても良い。 The main pole support material of the present invention may be a titanium carbide/alumina sintered material at least in the portion that contacts the medium, and may have a two-layer structure in which the surface is the sintered material and the other portion is a nonmagnetic material. Also good.
以上のように本発明は垂直磁化記録媒体に接触
して配されたCo−Crスパツタ膜よりなる垂直磁
化記録用主磁極ヘツドの主磁極支持材としてチタ
ンカーバイト−アルミナ焼結体を用いたものであ
り、媒体および主磁極ヘツドの摩耗をきわめて少
なくすることができる。 As described above, the present invention uses a titanium carbide-alumina sintered body as the main pole support material of a main pole head for perpendicular magnetization recording made of a Co-Cr sputtered film disposed in contact with a perpendicular magnetization recording medium. Therefore, wear of the medium and the main magnetic pole head can be extremely reduced.
第１図は本発明の一実施例における垂直磁化記
録用磁気ヘツドの構成を示す断面図、第２図は本
発明の磁気ヘツドの特性を他の材料を用いた磁気
ヘツドと比較して示す図である。
１……垂直磁化記録媒体、２……補助磁極、３
……主磁極、４……書き込みコイル、５……読み
出しコイル、６……高透磁率磁性体薄膜、７……
主磁極支持材。
FIG. 1 is a cross-sectional view showing the configuration of a magnetic head for perpendicular magnetization recording according to an embodiment of the present invention, and FIG. 2 is a diagram showing the characteristics of the magnetic head of the present invention in comparison with magnetic heads using other materials. It is. 1... Perpendicular magnetization recording medium, 2... Auxiliary magnetic pole, 3
...Main magnetic pole, 4...Writing coil, 5...Reading coil, 6...High permeability magnetic thin film, 7...
Main pole support material.
Claims (1)
主磁極を有し、かつ前記主磁極が高透磁率磁性体
薄膜を主磁極支持材で狹持した構造を備え、前記
主磁極支持材の少なくとも表面部分がアルミナと
チタンカーバイトを主成分とする多結晶焼結体か
ら成ることを特徴とする垂直磁化記録用磁気ヘツ
ド。1. A main magnetic pole that magnetizes the magnetic layer of the magnetic recording medium in the perpendicular direction, and the main magnetic pole has a structure in which a high permeability magnetic thin film is supported by a main magnetic pole supporting material, and at least one of the main magnetic pole supporting materials A magnetic head for perpendicular magnetization recording, characterized in that the surface portion is made of a polycrystalline sintered body whose main components are alumina and titanium carbide.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13195881A JPS5835717A (en) | 1981-08-21 | 1981-08-21 | Magnetic head for vertical magnetization recording |
| US06/409,895 US4745509A (en) | 1981-08-21 | 1982-08-20 | Magnetic head with improved supporter for perpendicular magnetization recording |
| DE19823231286 DE3231286A1 (en) | 1981-08-21 | 1982-08-23 | MAGNETIC HEAD FOR PERFORMING A MAGNETIC CROSS RECORDING |
| US07/127,538 US4796134A (en) | 1981-08-21 | 1987-11-30 | Magnetic head with improved supporter for perpendicular magnetization recording |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13195881A JPS5835717A (en) | 1981-08-21 | 1981-08-21 | Magnetic head for vertical magnetization recording |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5835717A JPS5835717A (en) | 1983-03-02 |
| JPH0152812B2 true JPH0152812B2 (en) | 1989-11-10 |
Family
ID=15070184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13195881A Granted JPS5835717A (en) | 1981-08-21 | 1981-08-21 | Magnetic head for vertical magnetization recording |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5835717A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58115619A (en) * | 1981-12-28 | 1983-07-09 | Seiko Epson Corp | Magnetic head |
-
1981
- 1981-08-21 JP JP13195881A patent/JPS5835717A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5835717A (en) | 1983-03-02 |
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