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JPH05101329A - Magnetic head - Google Patents

Magnetic head

Info

Publication number
JPH05101329A
JPH05101329A JP13447391A JP13447391A JPH05101329A JP H05101329 A JPH05101329 A JP H05101329A JP 13447391 A JP13447391 A JP 13447391A JP 13447391 A JP13447391 A JP 13447391A JP H05101329 A JPH05101329 A JP H05101329A
Authority
JP
Japan
Prior art keywords
magnetic
main
pole
tip
spacing
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
Application number
JP13447391A
Other languages
Japanese (ja)
Other versions
JP2901375B2 (en
Inventor
Toshio Kazama
敏雄 風間
Hiroe Takano
弘恵 高野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Priority to JP13447391A priority Critical patent/JP2901375B2/en
Publication of JPH05101329A publication Critical patent/JPH05101329A/en
Application granted granted Critical
Publication of JP2901375B2 publication Critical patent/JP2901375B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Abstract

PURPOSE:To generate a magnetic field strength distribution which is uniform over a broad range and is high by making a spacing at the edge part of a returning path core side in the tip end of a main magnetic pole longer than the spacing at the central part of the tip end. CONSTITUTION:A magnetic head 32 is provided with the main magnetic pole 34 wound with a coil 22, a returning path core 36 forming a magnetic path by binding both ends of the main magnetic pole 34, and a gap 42 formed with both the tip end part of the main magnetic pole 34 at a magnetic recording medium side and one end of the returning path core 36. This head is the magnetic head for which the spacing (a distance from the magnetic recording medium) is interposed to the magnetic recording medium 10. The spacing at the end part of the returning path core 36 side in the tip end of the main magnetic pole 34 is longer than the spacing at the central part of the tip. By such constitution, at the tip end of the main magnetic pole, the spacing at the end part of the returning path core 36 side is longer than the spacing at the central part, so that magnetic strength distribution being uniform over a broad range and high is generated.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は磁気記録媒体に変調磁界
を印加するための磁気ヘッドに関し、特に光磁気記録装
置に組込まれる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 applying a modulation magnetic field to a magnetic recording medium, and more particularly to a magnetic head incorporated in a magneto-optical recording device.

【0002】[0002]

【従来の技術】周知のように、光磁気記録装置はレーザ
ビームを磁気記録媒体に照射することにより、その一部
を加熱して抗磁力を下げ、その状態で磁界変調記録用磁
気ヘッドにより記録を行なうようにしたもので、比較的
小さな磁界によって垂直磁気記録をすることができると
いう特徴を持っている。
2. Description of the Related Art As is well known, a magneto-optical recording apparatus irradiates a laser beam on a magnetic recording medium to heat a part of the magnetic recording medium to lower the coercive force, and in that state, recording is performed by a magnetic head for magnetic field modulation recording. And is characterized in that perpendicular magnetic recording can be performed with a relatively small magnetic field.

【0003】光磁気記録装置における磁界変調記録用磁
気ヘッドの一例を図8に示す。図8において、磁気記録
媒体10はポリカーボネート等からなる透光性の基板1
2上に垂直磁化膜14(例えば、TbFeCo等からな
る)を設け、さらに垂直磁化膜14の表面に保護膜16
(例えば、SiO2等からなる)を設けてなる。 そし
て、垂直磁化膜14には光ヘッド中の集光レンズ18に
よって集光されたレーザビーム20が照射されて、照射
部分が加熱されるようになっている。一方、磁気ヘッド
32は、垂直磁化膜14の加熱部分に対して垂直磁気記
録を行なうもので、コイル22の巻回された主磁極24
と、主磁極24の両端を結んで磁路を形成するリターン
パスコア26,26と、主磁極24の先端部と両リター
ンパスコア26,26の磁気記録媒体10側の一端とで
形成されて非磁性体の介在されているギャップ28,2
8から構成される。そして、主磁極24に巻回されたコ
イル22に記録電流を流すことによって生じる磁界30
によって垂直磁化膜14を垂直磁化させ、磁気記録を行
なう。
FIG. 8 shows an example of a magnetic head for magnetic field modulation recording in a magneto-optical recording device. In FIG. 8, a magnetic recording medium 10 is a translucent substrate 1 made of polycarbonate or the like.
2 is provided with a perpendicular magnetic film 14 (for example, made of TbFeCo), and a protective film 16 is provided on the surface of the perpendicular magnetic film 14.
(For example, made of SiO 2 or the like). The perpendicular magnetization film 14 is irradiated with the laser beam 20 condensed by the condenser lens 18 in the optical head, and the irradiated portion is heated. On the other hand, the magnetic head 32 performs perpendicular magnetic recording on the heated portion of the perpendicular magnetization film 14, and the main magnetic pole 24 around which the coil 22 is wound.
And the return path cores 26, 26 that connect both ends of the main magnetic pole 24 to form a magnetic path, the tip of the main magnetic pole 24, and one end of each of the return path cores 26, 26 on the magnetic recording medium 10 side. Gap 28, 2 in which a non-magnetic material is interposed
It consists of 8. Then, a magnetic field 30 generated by passing a recording current through the coil 22 wound around the main magnetic pole 24
The perpendicular magnetization film 14 is perpendicularly magnetized by the magnetic recording to perform magnetic recording.

【0004】[0004]

【発明が解決しようとする課題】このように、光磁気記
録装置では、磁気記録媒体にレーザ光を照射する光ヘッ
ドと磁気記録媒体を挟んで対向し、情報信号に応じて変
調された磁界を発生する磁界変調用磁気ヘッドとの組合
せによりその機能を果すことができる。従って、両者の
相対位置にずれを生じると磁気記録媒体に正確な記録が
できないという問題がある。よって、光磁気記録装置に
おいては、広範囲に渡って均一な磁界分布を得ること
と、磁界強度を高めて電磁変換効率を高めることが望ま
れている。また、磁気ヘッドの記録効率を高めるため
に、ギャップ長を短くしたり、磁気ヘッドと磁気記録媒
体との距離(スペーシング)を短くしたりする等の工夫
がなされている。
As described above, in the magneto-optical recording device, the magnetic head irradiating the magnetic recording medium with the laser beam is opposed to the magnetic head with the magnetic recording medium interposed therebetween, and a magnetic field modulated according to the information signal is generated. Its function can be achieved by combining with the magnetic head for magnetic field modulation to be generated. Therefore, there is a problem that accurate recording cannot be performed on the magnetic recording medium if the relative positions of the two are displaced. Therefore, in the magneto-optical recording device, it is desired to obtain a uniform magnetic field distribution over a wide range and to enhance the magnetic field strength to enhance the electromagnetic conversion efficiency. Further, in order to improve the recording efficiency of the magnetic head, measures such as shortening the gap length and shortening the distance (spacing) between the magnetic head and the magnetic recording medium have been made.

【0005】しかしながら、上記従来例の磁気ヘッドの
ように主磁極を備え、ギャップを2つ有するデュアルギ
ャップタイプ(Dual Gap Type)の磁気ヘッドでは、磁
界のピークが両ギャップに対応し、磁界強度分布が双峰
特性となってしまう。
However, in the dual gap type magnetic head having the main magnetic pole and having two gaps like the above-mentioned conventional magnetic head, the peak of the magnetic field corresponds to both gaps, and the magnetic field strength distribution. Becomes a double peak characteristic.

【0006】ところで、特開昭62−279504号公
報によれば、磁界強度分布を単峰特性にした磁気ヘッド
が報告されている。この磁気ヘッドは、磁気記録媒体に
対向する頂面と先細り形状とされた先端部とを有する主
磁極と、この主磁極の先端部の先細り形状と略均一なギ
ャップを形成するリターンパスコアを有する磁気ヘッド
である。しかしながら、この磁気ヘッドは、主磁極の中
心位置での磁界強度を高めることはできるものの、磁界
強度分布は急峻で不均一であった。
By the way, according to Japanese Patent Laid-Open No. 62-279504, there is reported a magnetic head having a single-peaked magnetic field strength distribution. This magnetic head has a main pole having a top surface facing the magnetic recording medium and a tapered tip portion, and a return path core forming a substantially uniform gap with the tapered tip portion of the main pole. It is a magnetic head. However, although this magnetic head can increase the magnetic field strength at the central position of the main pole, the magnetic field strength distribution is steep and non-uniform.

【0007】本発明は前記課題を解決するためになされ
たもので、磁気ヘッドの主磁極の先端において、その中
心位置でのスペーシングよりもリターンパスコア側の端
部でのスペーシングを長くし、リターンパスコアのギャ
ップ面を主磁極の長手方向に平行にすることで、均一で
高い磁界強度分布を発生する磁気ヘッドを提供するもの
である。
The present invention has been made to solve the above-mentioned problems, and the spacing at the end portion on the return path core side is made longer than the spacing at the center position at the tip of the main magnetic pole of the magnetic head. By providing the gap surface of the return path core in parallel with the longitudinal direction of the main pole, a magnetic head that generates a uniform and high magnetic field strength distribution is provided.

【0008】[0008]

【課題を解決するための手段】請求項1記載の磁気ヘッ
ドは、コイルの巻回された主磁極と、主磁極の両端を結
んで磁路を形成するリターンパスコアと、磁気記録媒体
側の主磁極の先端部とリターンパスコアの一端とで形成
されるギャップを有し、磁気記録媒体との間にスペーシ
ングを介する磁気ヘッドにおいて、前記主磁極の先端の
リターンパスコア側の端部でのスペーシングが前記先端
の中央部でのスペーシングよりも長いことを特徴とする
ものである。尚、ここでスペーシングとは磁気記録媒体
との距離である。
According to a first aspect of the present invention, there is provided a magnetic head, wherein a main magnetic pole around which a coil is wound, a return path core connecting both ends of the main magnetic pole to form a magnetic path, and a magnetic recording medium side magnetic head are provided. In a magnetic head that has a gap formed between the tip of the main pole and one end of the return path core and has a spacing between the magnetic recording medium and the end of the tip of the main pole on the return path core side. Is longer than the spacing at the center of the tip. Here, the spacing is the distance from the magnetic recording medium.

【0009】請求項2記載の磁気ヘッドは、コイルの巻
回された強磁性体からなる主磁極と、主磁極の両端を結
んで磁路を形成するリターンパスコアと、磁気記録媒体
側の主磁極の先端部とリターンパスコアの一端とで形成
されるギャップを有する磁気ヘッドにおいて、前記主磁
極の先端のリターンパスコア側の端部に磁気特性劣化材
が拡散されていることを特徴とするものである。
According to a second aspect of the present invention, there is provided a magnetic head, a main magnetic pole made of a ferromagnetic material around which a coil is wound, a return path core connecting both ends of the main magnetic pole to form a magnetic path, and a main magnetic recording medium side main magnetic pole. In a magnetic head having a gap formed between a tip of a magnetic pole and one end of a return path core, a magnetic property deterioration material is diffused at an end of the tip of the main pole on the return path core side. It is a thing.

【0010】[0010]

【作用】本発明の磁気ヘッドでは、主磁極の先端のリタ
ーンパスコア側の端部でのスペーシングを主磁極の中央
部でのスペーシングよりも長くし、かつ、リターンパス
コアのギャップ面を主磁極の長手方向に平行にすること
で、均一で高い磁界強度分布を発生させるものである。
In the magnetic head of the present invention, the spacing at the end of the tip of the main pole on the return path core side is made longer than that at the center of the main pole, and the gap surface of the return path core is made smaller. By making it parallel to the longitudinal direction of the main pole, a uniform and high magnetic field strength distribution is generated.

【0011】また、主磁極の先端形状を柱状のまま、先
端のリターンパスコア側の端部に磁気特性劣化材を拡散
させることで、均一で高い磁界強度分布を発生させるも
のである。
Further, the magnetic property deteriorating material is diffused to the end portion on the return path core side of the tip while the tip shape of the main magnetic pole remains columnar to generate a uniform and high magnetic field strength distribution.

【0012】この際、主磁極の先端のリターンパスコア
側の端部でのスペーシングの増加長、または磁気特性劣
化材を拡散させる際の主磁極の先端からの距離範囲は、
20μm以下であることが好ましい。
In this case, the increased length of the spacing at the end of the main pole on the return path core side, or the distance range from the tip of the main pole when diffusing the magnetic property deterioration material is
It is preferably 20 μm or less.

【0013】[0013]

【実施例】【Example】

(実施例1)本発明の磁気ヘッドを実施例をもって以下
に説明する。尚、主磁極の先端を中心としたギャップ周
辺部以外は従来例の磁気ヘッドと同様なので、説明を省
略し、図1に本実施例の磁気ヘッドの特徴であるギャッ
プ周辺部の拡大図を示す。
(Embodiment 1) A magnetic head of the present invention will be described below with reference to an embodiment. Since the magnetic head is similar to the conventional magnetic head except for the peripheral portion of the gap centering on the tip of the main pole, description thereof is omitted, and FIG. 1 shows an enlarged view of the peripheral portion of the gap, which is a characteristic of the magnetic head of the present embodiment. ..

【0014】図1に示すように、磁気記録媒体10側の
主磁極34の先端部を中心にリターンパスコア36,3
6が対向している。ここで、主磁極34やリターンパス
コア36,36はMn−Znフェライトなどの強磁性材
料からなる。そして、主磁極34と各リターンパスコア
36,36の間にはギャップ42,42が形成されてい
る。尚、図1では主磁極の形状を明瞭にするために図示
していないが、ギャップ42,42にはガラスまたはC
aTiO3等の非磁性体からなるギャップ材が充填され
ていることが好ましい。本実施例の磁気ヘッドでは、主
磁極34の先端にテーパー面44,44が形成され、リ
ターンパスコア36,36側の端部38,38が主磁極
34の中心部分よりも磁気記録媒体から遠方に位置する
ようになっている。即ち、主磁極34の先端の中心部分
にリターンパスコア36,36側の端部38,38より
も磁気記録媒体に近接する頂面40が形成され、主磁極
34の先端部は凸型となっている。そして、リターンパ
ス36,36のギャップ42,42に面するギャップ面
46,46は主磁極34の長手方向と平行になってい
る。即ち、従来例の1つとして示した磁気ヘッドのよう
な、ギャップ面をテーパー面と平行にして均一なギャッ
プを形成していない。
As shown in FIG. 1, the return path cores 36, 3 are centered around the tip of the main magnetic pole 34 on the magnetic recording medium 10 side.
6 are facing each other. Here, the main magnetic pole 34 and the return path cores 36, 36 are made of a ferromagnetic material such as Mn-Zn ferrite. Further, gaps 42, 42 are formed between the main magnetic pole 34 and the return path cores 36, 36. Although not shown in FIG. 1 to clarify the shape of the main pole, the gaps 42, 42 are made of glass or C.
It is preferable that a gap material made of a non-magnetic material such as aTiO 3 is filled. In the magnetic head of this embodiment, tapered surfaces 44, 44 are formed at the tip of the main magnetic pole 34, and the end portions 38, 38 on the side of the return path cores 36, 36 are farther from the magnetic recording medium than the central portion of the main magnetic pole 34. It is located in. That is, a top surface 40 that is closer to the magnetic recording medium than the end portions 38, 38 on the side of the return path cores 36, 36 is formed in the central portion of the tip of the main pole 34, and the tip portion of the main pole 34 is convex. ing. The gap surfaces 46, 46 of the return paths 36, 36 facing the gaps 42, 42 are parallel to the longitudinal direction of the main magnetic pole 34. That is, unlike the magnetic head shown as one of the conventional examples, the gap surface is not parallel to the tapered surface to form a uniform gap.

【0015】主磁極34の先端にテーパー面44を形成
することによる頂面40とリターンパスコア36,36
側の端部38,38の磁気記録媒体10との距離(スペ
ーシングb)の差(スペーシング増加長)aは20μm
以内が好ましい。
A top surface 40 and return path cores 36, 36 formed by forming a tapered surface 44 at the tip of the main magnetic pole 34.
The difference (spacing increase length) a of the distance (spacing b) a between the side end portions 38, 38 and the magnetic recording medium 10 is 20 μm.
It is preferably within.

【0016】また、図2のように、主磁極の先端の形状
を連続的な曲面にすることで、その中央部よりもリター
ンパスコア36,36側の端部38,38を磁気記録媒
体から遠ざけても良い。
Further, as shown in FIG. 2, by making the shape of the tip of the main magnetic pole into a continuous curved surface, the end portions 38, 38 on the side of the return path cores 36, 36 from the central portion are formed from the magnetic recording medium. You can keep it away.

【0017】要するに、主磁極の先端の中央部がリター
ンパスコア側の端部よりも磁気記録媒体に近接していれ
ば本実施例の目的を達成することができるので、図1の
ようなテーパー面や図2のような曲面とする他にも、複
数の斜面の組合せによるものや、斜面と曲面の組合せに
よるものなどであっても差し支えない。
In short, if the central portion of the tip of the main pole is closer to the magnetic recording medium than the end portion on the return path core side, the object of the present embodiment can be achieved, so that the taper as shown in FIG. Other than the surface or the curved surface as shown in FIG. 2, a combination of a plurality of slopes, a combination of a slope and a curved surface, etc. may be used.

【0018】先端にテーパ面を有したり、または先端が
曲面である本実施例の磁気ヘッドの主磁極を製造するに
は種々の方法が考えられるが、例えば以下の方法を適用
できる。 (1) 磁性材料を切出してチップコアを製造する際
に、図3に示すように、リターンパスコア52,52に
挟まれる主磁極50の先端に凹部51,51を形成す
る。その後、図3の斜線部分を下方から研磨研削加工す
ることで、先端にテーパ面53,53を有する主磁極5
0を形成することができる。この方法では、磁気ヘッド
の従来法の製造工程を大幅に変えることなしに加工する
ことができる。即ち、予め、主磁極50に凹部51,5
1を形成するだけで良い。また、凹部51にはガラスが
充填される為、研磨研削加工後、表面に凹凸がなく、滑
らかになり、磁気ヘッドの摺動性能を損ねることがな
い。 (2) 主磁極の先端に、図4で示すような先端56が
凹状の治具(砥石)54を被せ、この治具54を回転さ
せることで主磁極の先端を曲面状にしたり、テーパ面を
有するように形成できる。 (3) 主磁極の先端の頂面をマスクした状態でエッチ
ングを行なう。この方法でも容易に主磁極の先端にテー
パ面を形成することができる。
Various methods are conceivable for manufacturing the main pole of the magnetic head of this embodiment, which has a tapered surface at the tip or a curved tip. For example, the following method can be applied. (1) When a magnetic core is cut out to manufacture a chip core, as shown in FIG. 3, recesses 51, 51 are formed at the tip of the main magnetic pole 50 sandwiched between the return path cores 52, 52. After that, the diagonally shaded portion in FIG. 3 is ground and polished from below, so that the main magnetic pole 5 having the tapered surfaces 53, 53 at the tip ends.
0 can be formed. With this method, the magnetic head can be processed without significantly changing the conventional manufacturing process. That is, the recesses 51, 5 are formed in the main pole 50 in advance.
All that is required is to form 1. Further, since the concave portion 51 is filled with glass, the surface is smooth and smooth after polishing and grinding, and the sliding performance of the magnetic head is not impaired. (2) The tip of the main pole is covered with a jig (grinding stone) 54 having a concave tip 56 as shown in FIG. 4, and the tip of the main pole is curved or tapered by rotating the jig 54. Can be formed. (3) Etching is performed with the top surface of the tip of the main pole being masked. Even with this method, the tapered surface can be easily formed at the tip of the main pole.

【0019】図5に示す本実施例の磁気ヘッドの磁界強
度分布を調べ、結果を図10にX線として示した。図1
0では、横軸はコアセンター(主磁極の中心)からの主
磁極の幅方向に沿った距離であり、縦軸は磁界強度(O
e)である。試験サンプルとして採用した本実施例の磁
気ヘッドは図5に示すように、主磁極34の幅が140
μm、頂面の幅が40μm、ギャップ長が40μm、頂面
におけるスペーシング(この試験に関しては、磁界強度
の測定地点c)は20μm、主磁極の端部におけるスペ
ーシングは25μmとした。即ち、スペーシング増加長
は5μmである。尚、比較例として、図6に示す磁気ヘ
ッド(Y線)と図7に示す磁気ヘッド(Z線)において
も測定を行なった。図6に示す磁気ヘッドは、主磁極6
2にテーパ面を形成しない従来例のもので、主磁極62
の幅は140μm、ギャップ長は40μmである。図7に
示す磁気ヘッドはもう一つの従来例として示したもの
で、頂面と先細り形状とされた先端部とを有する主磁極
68と、この主磁極68の先端部の先細り形状と略均一
なギャップ70,70を形成するリターンパスコア7
2,72を有する磁気ヘッドであり、頂面の幅は140
μm、テーパ面74,74に沿ったギャップ70,70
の幅は40μmである。尚、起磁力は全て2ATとし
た。また、いずれもスペーシング(この試験に関して
は、測定地点cとの距離)は20μmである。図10に
示す結果から、従来例の磁気ヘッドの磁界強度分布(Y
線)は主磁極62の側部に磁界強度分布のピークを有す
る双峰特性を示してしまい、主磁極62の位置では磁界
強度が弱まってしまっている。また、もう一つの従来例
であるリターンパスコア72,72のギャップ面76,
76が主磁極68のテーパ面74,74と平行になって
いる磁気ヘッドの磁界強度分布(Z線)は単峰特性を示
し、主磁極68の中心位置では磁界強度が高まっている
ものの、磁界強度分布が急峻で不均一で不適である。し
かしながら、本実施例の磁気ヘッドの磁界強度分布(X
線)は双峰特性にならず、主磁極34の位置では均一で
高い磁界強度を得ることができていることがわかる。従
って、本実施例の磁気ヘッドでは主磁極の位置に渡って
均一で高い磁界強度を得ることができ、記録精度の高い
ものである。
The magnetic field strength distribution of the magnetic head of this embodiment shown in FIG. 5 was examined, and the result is shown as X-ray in FIG. Figure 1
At 0, the horizontal axis is the distance from the core center (center of the main magnetic pole) along the width direction of the main magnetic pole, and the vertical axis is the magnetic field strength (O
e). As shown in FIG. 5, the magnetic head of this embodiment adopted as a test sample has a main magnetic pole 34 having a width of 140.
μm, the width of the top surface was 40 μm, the gap length was 40 μm, the spacing on the top surface (measurement point c of the magnetic field strength in this test) was 20 μm, and the spacing at the end of the main pole was 25 μm. That is, the spacing increase length is 5 μm. As a comparative example, the measurement was also performed on the magnetic head (Y line) shown in FIG. 6 and the magnetic head (Z line) shown in FIG. The magnetic head shown in FIG.
2 is a conventional example in which no tapered surface is formed on the main magnetic pole 62.
Has a width of 140 μm and a gap length of 40 μm. The magnetic head shown in FIG. 7 is shown as another conventional example. The main magnetic pole 68 has a top surface and a tapered tip, and the tip of the main magnetic pole 68 has a substantially uniform tapered shape. Return path core 7 forming the gaps 70, 70
The magnetic head has 2, 72, and the width of the top surface is 140
μm, gaps 70, 70 along tapered surfaces 74, 74
Has a width of 40 μm. The magnetomotive force was all 2 AT. In addition, the spacing (in this test, the distance from the measurement point c) is 20 μm. From the results shown in FIG. 10, the magnetic field strength distribution (Y
The line) shows a bimodal characteristic having a peak of the magnetic field strength distribution on the side of the main magnetic pole 62, and the magnetic field strength is weakened at the position of the main magnetic pole 62. Further, the gap surface 76 of the return path core 72, 72, which is another conventional example,
The magnetic field strength distribution (Z line) of the magnetic head in which 76 is parallel to the tapered surfaces 74, 74 of the main magnetic pole 68 shows a single-peaked characteristic, and the magnetic field strength increases at the center of the main magnetic pole 68, but The intensity distribution is steep, uneven, and unsuitable. However, the magnetic field strength distribution (X
It is understood that the line) does not have the bimodal characteristic, and uniform and high magnetic field strength can be obtained at the position of the main magnetic pole 34. Therefore, in the magnetic head of this embodiment, a uniform and high magnetic field strength can be obtained over the position of the main magnetic pole, and the recording accuracy is high.

【0020】(実施例2)図9に実施例2の磁気ヘッド
を示す。この磁気ヘッドでもコイル(図示略)の巻回さ
れたMn−Znフェライトなどの強磁性体からなる主磁
極58と、主磁極58の両端を結んで磁路を形成する強
磁性体からなるリターンパスコア36,36と、磁気記
録媒体側の主磁極58の先端とリターンパスコア36,
36の一端とで形成されるギャップ42,42を有して
いる。無論ギャップ42,42にはガラスまたは Ca Ti
O3 等の非磁性体からなるギャップ材が充填されている
ことが好ましい。
(Embodiment 2) FIG. 9 shows a magnetic head of Embodiment 2. Also in this magnetic head, a main magnetic pole 58 made of a ferromagnetic material such as Mn-Zn ferrite in which a coil (not shown) is wound, and a return path made of a ferromagnetic material that connects both ends of the main magnetic pole 58 to form a magnetic path. The scores 36, 36, the tip of the main magnetic pole 58 on the magnetic recording medium side, the return path core 36,
It has gaps 42, 42 formed with one end of 36. Of course, glass or Ca Ti is used for the gaps 42, 42.
It is preferable that a gap material made of a non-magnetic material such as O 3 is filled.

【0021】そして、この実施例2の磁気ヘッドの主磁
極58の先端はテーパ面の形成や、曲面の形成はされて
いないが、主磁極58の先端のリターンパスコア36,
36側の端部には磁気特性劣化材60,60が拡散され
ている。この磁気特性劣化材60は、主磁極58の磁気
特性を劣化させるもので、主磁極58の磁気特性劣化材
60の拡散されている部分は、実質上、磁気コアとして
のはたらきを有しない。この磁気特性劣化材60には、
具体的には、O2+、Zn2+ 等を使用することができ
る。さらに、この磁気特性劣化材60の主磁極58への
拡散方法としては、半導体製造等に用いられる熱拡散法
やイオン注入法等が適用でき、主磁極の先端表面をフォ
トレジスト等でマスクし、拡散させる箇所にのみマスク
を除去することで、磁気特性劣化材を所定位置にのみに
拡散できる。この実施例2の磁気ヘッドにおいても実施
例1の磁気ヘッドと同様に、主磁極の位置では均一で高
い磁界強度を得ることができる。よって、この実施例2
の磁気ヘッドでも、主磁極の位置に渡って均一で高い磁
界強度を得ることができ、記録精度の高いものである。
The tip of the main pole 58 of the magnetic head of the second embodiment is not formed with a tapered surface or a curved surface, but the return path core 36 at the tip of the main pole 58,
Magnetic property deterioration materials 60, 60 are diffused at the end on the 36 side. The magnetic characteristic deterioration material 60 deteriorates the magnetic characteristics of the main magnetic pole 58, and the portion of the main magnetic pole 58 where the magnetic characteristic deterioration material 60 is diffused does not substantially function as a magnetic core. The magnetic property deterioration material 60 includes
Specifically, O 2+ , Zn 2+ and the like can be used. Further, as a method of diffusing the magnetic property deterioration material 60 into the main magnetic pole 58, a thermal diffusion method or an ion implantation method used in semiconductor manufacturing or the like can be applied, and the tip surface of the main magnetic pole is masked with a photoresist or the like. By removing the mask only at the portion to be diffused, the magnetic property deterioration material can be diffused only at a predetermined position. In the magnetic head of the second embodiment as well, similar to the magnetic head of the first embodiment, uniform and high magnetic field strength can be obtained at the position of the main pole. Therefore, this Example 2
Even in the magnetic head described above, a uniform and high magnetic field strength can be obtained over the position of the main magnetic pole, and the recording accuracy is high.

【0022】[0022]

【発明の効果】請求項1記載の磁気ヘッドは、主磁極の
先端において、リターンパスコア側の端部でのスペーシ
ングが中央部でのスペーシングよりも長くすることで、
広範囲に渡って均一で高い磁界強度分布を発生させるも
のである。従って、特に光磁気記録装置の磁気ヘッドと
して使用した場合に、正確な磁気記録の信頼度を高める
ものである。
According to the magnetic head of the first aspect of the present invention, the spacing at the end portion on the return path core side at the tip of the main magnetic pole is made longer than the spacing at the central portion,
It is intended to generate a uniform and high magnetic field strength distribution over a wide range. Therefore, particularly when used as a magnetic head of a magneto-optical recording device, the reliability of accurate magnetic recording is enhanced.

【0023】請求項2記載の磁気ヘッドは、主磁極のリ
ターンパスコア側の端部に磁気特性劣化材を拡散させた
もので、これにより、主磁極の端部での磁気特性のはた
らきを抑え、請求項1記載の磁気ヘッドと同様に、広範
囲に渡って均一で高い磁界強度分布を発生させるもので
ある。従って、特に光磁気記録装置の磁気ヘッドとして
使用した場合に、正確な磁気記録の信頼度を高めるもの
である。
In the magnetic head according to the second aspect of the present invention, the magnetic characteristic deterioration material is diffused at the end of the main pole on the return path core side, whereby the function of the magnetic characteristic at the end of the main pole is suppressed. Similar to the magnetic head according to the first aspect of the invention, it is intended to generate a uniform and high magnetic field strength distribution over a wide range. Therefore, particularly when used as a magnetic head of a magneto-optical recording device, the reliability of accurate magnetic recording is enhanced.

【図面の簡単な説明】[Brief description of drawings]

【図1】実施例1の磁気ヘッドの主磁極の先端部の側面
図である。
FIG. 1 is a side view of a tip end portion of a main pole of a magnetic head according to a first exemplary embodiment.

【図2】実施例1の別の磁気ヘッドの主磁極の先端部の
側面図である。
FIG. 2 is a side view of a tip end portion of a main pole of another magnetic head of the first embodiment.

【図3】実施例1の磁気ヘッドの主磁極の先端の製造方
法を説明するための側面図である。
FIG. 3 is a side view for explaining the method for manufacturing the tip of the main pole of the magnetic head of the first embodiment.

【図4】実施例1の磁気ヘッドの主磁極の先端の別な製
造方法を説明するための部分斜視図である。
FIG. 4 is a partial perspective view for explaining another method of manufacturing the tip of the main pole of the magnetic head of the first embodiment.

【図5】試験サンプルとした本実施例の磁気ヘッドの主
磁極の先端部の側面図である。
FIG. 5 is a side view of the tip portion of the main pole of the magnetic head of this embodiment as a test sample.

【図6】試験サンプルとした従来例の磁気ヘッドの主磁
極の先端部の側面図である。
FIG. 6 is a side view of a tip portion of a main pole of a conventional magnetic head used as a test sample.

【図7】試験サンプルとした別の従来例の磁気ヘッドの
主磁極の先端部の側面図である。
FIG. 7 is a side view of a tip portion of a main pole of another conventional magnetic head used as a test sample.

【図8】従来例の磁気ヘッドの側面図である。FIG. 8 is a side view of a conventional magnetic head.

【図9】実施例2の磁気ヘッドの主磁極の先端部の側面
図である。
FIG. 9 is a side view of the tip of the main pole of the magnetic head of the second embodiment.

【図10】磁界強度分布の測定結果を示すグラフであ
る。
FIG. 10 is a graph showing measurement results of magnetic field strength distribution.

【符号の説明】[Explanation of symbols]

10 磁記録媒体 22 コイル 24,34,48,50,58,62,68 主磁極 26,36,52,64,72 リターンパスコア 28,42,66 ギャップ 32 磁気ヘッド 38 端部 60 磁気特性劣化材 10 magnetic recording medium 22 coil 24, 34, 48, 50, 58, 62, 68 main pole 26, 36, 52, 64, 72 return path core 28, 42, 66 gap 32 magnetic head 38 end 60 magnetic property deterioration material

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 コイルの巻回された主磁極と、主磁極の
両端を結んで磁路を形成するリターンパスコアと、磁気
記録媒体側の主磁極の先端部とリターンパスコアの一端
とで形成されるギャップを有し、磁気記録媒体との間に
スペーシングを介する磁気ヘッドにおいて、前記主磁極
の先端のリターンパスコア側の端部でのスペーシングが
前記先端の中央部でのスペーシングよりも長いことを特
徴とする磁気ヘッド。
1. A main magnetic pole around which a coil is wound, a return path core that connects both ends of the main magnetic pole to form a magnetic path, a tip of the main magnetic pole on the magnetic recording medium side, and one end of the return path core. In a magnetic head having a formed gap and having a spacing between the magnetic recording medium and the magnetic recording medium, the spacing at the end of the tip of the main pole on the return path core side is the spacing at the center of the tip. Magnetic head characterized by being longer than.
【請求項2】 コイルの巻回された強磁性体からなる主
磁極と、主磁極の両端を結んで磁路を形成するリターン
パスコアと、磁気記録媒体側の主磁極の先端部とリター
ンパスコアの一端とで形成されるギャップを有する磁気
ヘッドにおいて、前記主磁極の先端のリターンパスコア
側の端部に磁気特性劣化材が拡散されていることを特徴
とする磁気ヘッド。
2. A main magnetic pole made of a ferromagnetic material in which a coil is wound, a return path core connecting both ends of the main magnetic pole to form a magnetic path, a tip of the main magnetic pole on the magnetic recording medium side, and a return path. A magnetic head having a gap formed with one end of a score, wherein a magnetic property deterioration material is diffused at an end of the tip of the main pole on the side of the return path core.
JP13447391A 1991-06-05 1991-06-05 Magnetic head Expired - Fee Related JP2901375B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13447391A JP2901375B2 (en) 1991-06-05 1991-06-05 Magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13447391A JP2901375B2 (en) 1991-06-05 1991-06-05 Magnetic head

Publications (2)

Publication Number Publication Date
JPH05101329A true JPH05101329A (en) 1993-04-23
JP2901375B2 JP2901375B2 (en) 1999-06-07

Family

ID=15129144

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13447391A Expired - Fee Related JP2901375B2 (en) 1991-06-05 1991-06-05 Magnetic head

Country Status (1)

Country Link
JP (1) JP2901375B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8130598B2 (en) 2005-11-01 2012-03-06 Hitachi, Ltd. Head for thermal assisted magnetic recording device, and thermal assisted magnetic recording device

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8130598B2 (en) 2005-11-01 2012-03-06 Hitachi, Ltd. Head for thermal assisted magnetic recording device, and thermal assisted magnetic recording device

Also Published As

Publication number Publication date
JP2901375B2 (en) 1999-06-07

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