JPH0191313A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPH0191313A JPH0191313A JP24710587A JP24710587A JPH0191313A JP H0191313 A JPH0191313 A JP H0191313A JP 24710587 A JP24710587 A JP 24710587A JP 24710587 A JP24710587 A JP 24710587A JP H0191313 A JPH0191313 A JP H0191313A
- Authority
- JP
- Japan
- Prior art keywords
- gap
- magnetic
- read
- write
- magnetic pole
- 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
- 239000012141 concentrate Substances 0.000 abstract 1
- 239000010408 film Substances 0.000 description 4
- 239000000696 magnetic material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 239000010409 thin film Substances 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
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
- G11B5/245—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features comprising means for controlling the reluctance of the magnetic circuit in a head with single gap, for co-operation with one track
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は磁気記録再生装置に使用される磁気ヘッド、特
に高記録密度用薄膜磁気ヘッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic head used in a magnetic recording/reproducing device, and particularly to a thin film magnetic head for high recording density.
従来、この種の磁気ヘッドは例えば第２図に示すように
基板ｌ上に第１の磁性体（磁性膜）２と第２の磁性体（
磁性膜）５の間にコイル４を巻いて磁気回路を構成して
いる。２つの磁性膜の先端部の間３はアルミナ、Ｓｉｎ
、などの非磁性体が充填されて読み出し書き込みギャッ
プとなっており、この部分を浮上面側からみたものが第
３図である。同図に示すとおり第２の磁性体５の磁極５
１は第１の磁性体２の磁極２１と対向してギャップ３を
形成しており対向部の長さ、つまり第２の磁極の長さと
ほぼ同じ長さがトラック巾となっている。従来の例では
トラック巾の精度を期するため第２の磁極は通常第１の
磁極より短く、このため、第２の磁極の両側部５２．５
２’と第１の磁極の両端部６２．６２’との間で擬似的
なギャップが形成されている。Conventionally, this type of magnetic head has a first magnetic material (magnetic film) 2 and a second magnetic material (magnetic film) on a substrate l, as shown in FIG.
A coil 4 is wound between the magnetic films 5 to form a magnetic circuit. The space 3 between the tips of the two magnetic films is made of alumina, sin
A read/write gap is filled with a non-magnetic material such as . As shown in the figure, the magnetic pole 5 of the second magnetic body 5
1 faces the magnetic pole 21 of the first magnetic body 2 to form a gap 3, and the length of the opposing portion, that is, approximately the same length as the length of the second magnetic pole, is the track width. In the conventional example, the second magnetic pole is usually shorter than the first magnetic pole in order to ensure accuracy of the track width.
A pseudo gap is formed between the magnetic pole 2' and both ends 62, 62' of the first magnetic pole.
しかしながら、この擬似ギャップにより書き込み時には
図に矢印で示すような大きなもれ磁界が発生し隣接トラ
ックに影響を及ぼし、再生時には隣接トラックからの信
号を拾ってしまい、いわゆるクロストークノイズ発生の
原因となっている。However, this pseudo gap generates a large leakage magnetic field as shown by the arrow in the figure during writing, which affects adjacent tracks, and during playback, it picks up signals from adjacent tracks, causing so-called crosstalk noise. ing.
これを防ぐには信号トラックの巾を大きくして隣接トラ
ックからの雑音の大きさを相対的に小さくしたり、トラ
ック間のガートバンドを大きくするなどの方策が取られ
ていたが、このためトラック密度が向上できず、磁気記
録再生装置の小型化、又は大容量化の大きな障害となっ
ていた。To prevent this, measures have been taken such as increasing the width of the signal track to relatively reduce the amount of noise from adjacent tracks, and increasing the guard band between tracks. The density cannot be improved, which has been a major obstacle to miniaturizing or increasing the capacity of magnetic recording/reproducing devices.
本発明の目的は前記問題点を解消するもので、２つの磁
極の両側部に前記擬似ギャップが形成されることのない
新たな構成のギャップを提供するものである。An object of the present invention is to solve the above-mentioned problems, and to provide a gap with a new configuration in which the above-mentioned pseudo gap is not formed on both sides of two magnetic poles.
本発明は第１の磁極と第２の磁極とをそれぞれのヘッド
走行方向と直角な面において対向させその両者間に第１
のギャップを形成し、さらに該第１の磁極を第２の磁極
の磁気ヘッド走行方向と平行な面において対向させ第２
のギャップを形成したことを特徴とする磁気ヘッドであ
る。The present invention has a first magnetic pole and a second magnetic pole facing each other in a plane perpendicular to the head running direction, and a first magnetic pole between them.
A gap is formed, and the first magnetic pole is opposed to the second magnetic pole in a plane parallel to the running direction of the magnetic head.
This magnetic head is characterized by forming a gap of .
以下、図面を参照して本発明の一実施例について説明す
る。An embodiment of the present invention will be described below with reference to the drawings.
第１図は本発明の一実施例を示すヘッドの読み出し書き
込みギャップを浮上面側から見たものである。FIG. 1 shows a read/write gap of a head showing one embodiment of the present invention, viewed from the air bearing surface side.
図において、第１の磁極２１と第２の磁極５１とはそれ
ぞれのヘッド走行方向と直角な面において非磁性体を介
して対向しギャップ３を形成し、さらに第２の磁極５１
は第１の磁極２１の両端部、すなわちヘッド走行方向と
平行な辺においても第１の磁ＶｉＡ２１と非磁性体を介
して対向しギャップ３’、３’を形成する。この構成の
磁気ヘッドでは有効な信号の読み出し書き込みはギャッ
プ３によってなされ、ギャップ３′及び３′は信号トラ
ックと直角方向に形成されたギャップである。書き込み
時には磁極５１と２１との間の端部においては漏れ磁界
はギャップ３′及び３′に集中するため、隣接トラック
への影響はほとんどなく、またギャップ３′及び３′に
より発生する磁界は信号の書き込みギャップ３に対して
直角方向である。このギャップ３′、３′によって媒体
上に記録される部分の巾（これをサイトレーンと呼ぶ）
、すなわち媒体走行方向と直角方向の長さはギャップ３
’、３’の間隙と同程度の０．３〜０．５ミクロンであ
り、信号の磁化反転間隔が磁極２１の厚さｔよりも長い
場合はサイトレーンも信号に寄与し、信号の磁化反転間
隔がｔよりも短い場合はサイトレーンは交流イレーズ状
態となる。一方、読み出し時には第２の磁極５１の端部
がシールドとして働くため、隣接トラックからの信号が
雑音として再生されることはない。In the figure, the first magnetic pole 21 and the second magnetic pole 51 face each other with a non-magnetic material in between in a plane perpendicular to the head running direction, forming a gap 3, and the second magnetic pole 51
also face the first magnetic ViA 21 via a nonmagnetic material at both ends of the first magnetic pole 21, that is, sides parallel to the head running direction, forming gaps 3', 3'. In the magnetic head having this configuration, effective signals are read and written through the gap 3, and the gaps 3' and 3' are gaps formed in a direction perpendicular to the signal track. During writing, the leakage magnetic field at the end between the magnetic poles 51 and 21 is concentrated in the gaps 3' and 3', so there is almost no effect on adjacent tracks, and the magnetic field generated by the gaps 3' and 3' is The direction is perpendicular to the write gap 3 of . The width of the area recorded on the medium by these gaps 3' and 3' (this is called the site lane)
, that is, the length in the direction perpendicular to the medium running direction is the gap 3
If the magnetization reversal interval of the signal is longer than the thickness t of the magnetic pole 21, the site lane also contributes to the signal, and the magnetization reversal of the signal If the interval is shorter than t, the sight lane is in the AC erase state. On the other hand, during reading, since the end of the second magnetic pole 51 acts as a shield, signals from adjacent tracks are not reproduced as noise.
以上のように本発明の磁気ヘッドでは信号の読み書きを
行うギャップの両端にヘッド走行方向と直角のギャップ
を有することにより、読み出し、書き込みのいずれにお
いてもクロストークの極めて少ない高品質の記録再生が
実現できる効果を有するものである。As described above, in the magnetic head of the present invention, by having a gap perpendicular to the head running direction at both ends of the gap for reading and writing signals, high-quality recording and reproduction with extremely low crosstalk can be realized in both reading and writing. It has the effect that it can.
第１図は本発明の一実施例を示す、第２図は従来例を示
す斜視図、第３図は従来例における浮上面磁極を示す図
である。FIG. 1 shows an embodiment of the present invention, FIG. 2 is a perspective view of a conventional example, and FIG. 3 is a diagram showing air bearing surface magnetic poles in the conventional example.
Claims (1)
行方向と直角な面において対向させその両者間に第１の
ギャップを形成し、さらに該第１の磁極を第２の磁極の
磁気ヘッド走行方向と平行な面において対向させ第２の
ギャップを形成したことを特徴とする磁気ヘッド。(1) A first magnetic pole and a second magnetic pole are opposed to each other in a plane perpendicular to the head running direction, a first gap is formed between them, and the first magnetic pole is connected to the second magnetic pole. A magnetic head characterized in that a second gap is formed so as to face each other in a plane parallel to the running direction of the magnetic head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24710587A JPH0191313A (en) | 1987-09-30 | 1987-09-30 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24710587A JPH0191313A (en) | 1987-09-30 | 1987-09-30 | Magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0191313A true JPH0191313A (en) | 1989-04-11 |
Family
ID=17158503
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24710587A Pending JPH0191313A (en) | 1987-09-30 | 1987-09-30 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0191313A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5191198A (en) * | 1991-03-22 | 1993-03-02 | Transaction Technology, Inc. | Gimbal card reader |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5744218A (en) * | 1980-08-29 | 1982-03-12 | Nec Corp | Magnetic head of narrow track |
-
1987
- 1987-09-30 JP JP24710587A patent/JPH0191313A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5744218A (en) * | 1980-08-29 | 1982-03-12 | Nec Corp | Magnetic head of narrow track |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5191198A (en) * | 1991-03-22 | 1993-03-02 | Transaction Technology, Inc. | Gimbal card reader |
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