JPS63138514A - Thin film magnetic head - Google Patents

Abstract

PURPOSE:To minimize a facing area between two magnetic poles and to reduce magnetic coupling between two electrodes by attain such position relation that only the tip part of the magnetic poles of both transducers that a thin type magnetic head splits is confronted. CONSTITUTION:A reproduction transducer 1 obtained by laminating a gap layer 9 and a coil 11 is arranged between the magnetic poles 3 and 4 of a recording and reproducing split thin magnetic head through an interlayer insulating layer 13. A recording transducer 2 with the same structure as that of the transducer 1 is disposed, facing the transducer 1, through an insulating layer 17. A magnetic tip part between the transducers 1 and 2 records and reproduces the same track of a recording medium. The magnetic poles 3-6 are formed not so as to face with each other apart from their tip part (c) in the transducers 1 and 2 of the magnetic head. The area that the magnetic poles 3-6 in the transducers 1 and 2 face can be minimized, and the maximum level of an area 20 which results in the coupling noise of a reproduction waveform is made lower than the maximum value 19 of a main reproduction signal.

Description

【発明の詳細な説明】 〔概要〕 この発明は、記録再生分離型薄膜磁気ヘッドの両磁気ト
ランスデユーサ間に生ずる磁気的カップリングによるノ
イズを減少するために、両トランスデエーサの磁極の先
端部を対向する位置に、他端部を非対向位置に形成した
構造である。[Detailed Description of the Invention] [Summary] The present invention aims to reduce noise due to magnetic coupling occurring between both magnetic transducers of a recording/reproducing separated type thin film magnetic head. It has a structure in which the two ends are formed at opposite positions, and the other ends are formed at non-opposed positions.

〔産業上の利用分野〕[Industrial application field]

この発明は薄膜磁気ヘッド、特に記録再住分離型薄膜磁
気ヘッドに関するものである。The present invention relates to a thin film magnetic head, and particularly to a separate recording and re-living type thin film magnetic head.

磁気ディスク装置は情報処理分野で広く用いられている
。一方、記録する情報を高密度にする手段の一つに、記
録及び再生にそれぞれ適合した記録用トランスデユーサ
と再生用トランスデユーサを別個に形成した記録再生分
離型薄膜磁気ヘッドがある。Magnetic disk drives are widely used in the information processing field. On the other hand, one means for increasing the density of recorded information is a separate recording/reproducing type thin film magnetic head in which a recording transducer and a reproducing transducer respectively adapted for recording and reproduction are formed separately.

〔従来の技術〕[Conventional technology]

第３図は記録再生分離型ｖＩ＃膜磁気ヘッドの要部断面
図である。スライダとなる基板１５の上に絶縁層１６を
介して再生用巻線型薄膜磁気トランスデユーサ１を形成
し、この再生用巻線型薄膜磁気トランスデユーサ（以後
再生用トランスデユーサと記す）１に絶縁Ｎ１７を介し
て記録用巻線型薄膜磁気トランスデユーサ（以後記録用
トランスデユーサと記す）２を形成しである。この従来
の再生、記録用トランスデユーサ１．２の磁極３．４及
び５゜６の位置関係は、第４図に示すように形成されて
いる。この図は第３図を矢印Ａ方向からみた平面図であ
る。即ち、両トランスデユーサ１．２の磁極３，４，５
．６は絶縁層１７を介して重なり合うように構成されて
いる。FIG. 3 is a sectional view of a main part of a recording/reproducing separated type vI# film magnetic head. A reproducing wire-wound thin film magnetic transducer 1 is formed on a substrate 15 serving as a slider via an insulating layer 16, and this reproducing wire-wound thin film magnetic transducer (hereinafter referred to as a reproducing transducer) 1 is A recording wire-wound thin film magnetic transducer (hereinafter referred to as a recording transducer) 2 is formed via an insulator N17. The positional relationship between the magnetic poles 3.4 and 5.degree. 6 of this conventional reproducing/recording transducer 1.2 is formed as shown in FIG. This figure is a plan view of FIG. 3 viewed from the direction of arrow A. That is, the magnetic poles 3, 4, 5 of both transducers 1.2
．． 6 are configured to overlap with each other with an insulating layer 17 in between.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記したように、従来の記録再生分離型ヘッドでは、両
トランスデユーサの磁極が重なっているために、両トラ
ンスデユーサ間の磁気的力・ノブリングが強くなり、再
生用トランスデユーサ１が作動している時の再生波形は
、第５図（ｂ）に示すように、記録用トランスデユーサ
２の領域にまで伸びており、図で示す領域２００波形が
カップリングノイズとなる。このノイズのレベルの最大
値は、主再生信号の最高値１９の１０〜２０％程度にな
るため、再生波形のピークシフトを生じ高品質の記録／
再生を妨げるという問題があった。As mentioned above, in the conventional recording/reproduction separated type head, since the magnetic poles of both transducers overlap, the magnetic force/knobling between both transducers becomes strong, and the reproduction transducer 1 is activated. As shown in FIG. 5(b), the reproduced waveform during this time extends to the area of the recording transducer 2, and the waveform in area 200 shown in the figure becomes coupling noise. The maximum level of this noise is about 10 to 20% of the maximum value 19 of the main reproduction signal, which causes a peak shift in the reproduction waveform and prevents high-quality recording/
There was a problem that it interfered with playback.

この発明は、上記した従来の状況から磁気的カップリン
グが少なく高品質な記録ン再生の行える記録再生分離型
薄膜磁気ヘッドを提供することを目的とするものである
。SUMMARY OF THE INVENTION It is an object of the present invention to provide a separate type thin film magnetic head for recording and reproducing, which is capable of high-quality recording and reproducing with little magnetic coupling.

〔問題点を解決するための手段〕[Means for solving problems]

この発明の薄膜磁気ヘッドは、両トランスデエーサの磁
極を先端部を除いて非対向位置に形成した構造である。The thin film magnetic head of the present invention has a structure in which the magnetic poles of both transducers are formed at non-opposed positions except for the tip portions.

〔作用〕[Effect]

両トランスデユーサの磁極は先端部だけが対向する位置
関係であるために、両磁極間の対向面積は小さくなり、
両磁極間の磁気的カップリングは減少する。Since the magnetic poles of both transducers are positioned so that only their tips face each other, the opposing area between the two magnetic poles is small.
The magnetic coupling between the poles is reduced.

〔実施例〕〔Example〕

第１図は本発明による記録再生分離型薄膜磁気ヘッドの
要部平面図である。なお本発明の特徴は両トランスデユ
ーサ１．２の各磁極の配設位置にあるので、この図も第
４図の矢印Ａ方向から見た平面図である。再生用トラン
スデユーサｌの磁極３．４と記録用トランスデユーサ２
の磁極５．６は絶縁層１７を介して先端部Ｃだけが重な
り、他端部Ｂは重ならないよう磁極の幅方向にずらした
非対向位置に形成されている。FIG. 1 is a plan view of a main part of a separate recording/reproducing type thin film magnetic head according to the present invention. Since the feature of the present invention lies in the arrangement positions of the respective magnetic poles of both transducers 1.2, this figure is also a plan view seen from the direction of arrow A in FIG. 4. Magnetic pole 3.4 of transducer 1 for reproduction and transducer 2 for recording
The magnetic poles 5.6 are formed so that only the tip portions C overlap with each other via the insulating layer 17, and the other end portions B are formed at non-opposing positions shifted in the width direction of the magnetic poles so as not to overlap.

第２図は本実施例の薄膜磁気ヘッドの再生波形図であり
、カップリングノイズとなる領域２０の最高レベルは、
主再生信号の最高値１９０５％程度以下となる。したが
って、ピークシフトが防止される。FIG. 2 is a reproduction waveform diagram of the thin-film magnetic head of this embodiment, and the highest level of the coupling noise region 20 is:
The maximum value of the main reproduction signal is about 1905% or less. Therefore, peak shifts are prevented.

〔効果〕〔effect〕

以上の説明から明らかなように、本発明は、両トランス
デユーサの磁極を先端部のみ対向位置にすると云う簡単
な構成で、磁気カフプリングノイズの減少が図れ、再生
波形にピークシフトの少ない高品質の記録再生が得られ
、磁気装置に適用すると実用上有効な効果を発揮する。As is clear from the above description, the present invention has a simple configuration in which only the tips of the magnetic poles of both transducers are placed in opposing positions, thereby reducing magnetic cuff-pulling noise and producing high-frequency reproduction waveforms with little peak shift. High-quality recording and reproduction can be obtained, and when applied to magnetic devices, it exhibits a practically effective effect.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本発明の一実施例に係る記録再生分離型薄膜磁
気ヘッドの磁極の配置関係を示す平面図、 第２図は本発明実施例の薄膜磁気ヘッドの再生波形図、 第３図は記録再生分離型薄膜磁気ヘッドの要部断面図、 第４図は従来の記録再生分離型薄膜磁気ヘッドの磁極の
配置関係を示す平面図、 第５図は従来の薄膜磁気ヘッドの再生波形図である。 図において、１は再生用トランスデユーサ、２は記録用
トランスデユーサ、３〜６は磁極、Ｂは他端部、Ｃは先
端部を示す。 半発υが笑語例−傳ｎｒＪ轄Ａ律ｄ牲ｊへ形ｍ第２図 缶ＡＡ由生４ト顛１賢】Ｉ更ｉｎへ、７：、ｆ帥Ｊケ盾
Ｈ刀第３図 ３．４，５．６櫨待 ｎｔ４ｘｓｆｌｌｔｒＥｆｌｔ、木ＴＪ７ｍｍ第４図FIG. 1 is a plan view showing the arrangement of magnetic poles in a separate recording/reproducing thin film magnetic head according to an embodiment of the present invention, FIG. 2 is a reproduction waveform diagram of the thin film magnetic head according to an embodiment of the present invention, and FIG. Figure 4 is a cross-sectional view of the main parts of a separate recording/reading type thin film magnetic head; Figure 4 is a plan view showing the arrangement of magnetic poles in a conventional recording/reading separated type thin film magnetic head; Figure 5 is a reproduction waveform diagram of a conventional thin film magnetic head. be. In the figure, 1 is a reproducing transducer, 2 is a recording transducer, 3 to 6 are magnetic poles, B is the other end, and C is the tip. Half shot υ is a humorous example - den nr J jurisdiction A law d sacrificial j to form m Fig. 2 can AA Yui 4 to 1 ken] I change in to, 7:, f 帥 J ke shield H sword Fig. 3 3.4, 5.6 Hajimachi nt4xsflltrEflt, wood TJ7mm Fig. 4

Claims (1)

【特許請求の範囲】 磁極（３、４）間に層間絶縁層（１３）を介在してギャ
ップ層（９）とコイル（１１）を積層した再生用巻線型
薄膜磁気トランスデューサ（１）と、該薄膜磁気トラン
スデューサ（１）と同一構造を有する記録用巻線型薄膜
磁気トランスデューサ（２）とを絶縁層（１７）を介し
て配設し、前記両薄膜磁気トランスデューサ（１、２）
の磁極先端部が記録媒体の同一トラックの記録再生を行
う記録再生分離型薄膜磁気ヘッドにおいて、 前記両薄膜磁気トランスデューサ（１、２）の磁極（３
、４、５、６）を前記磁極先端部（ｃ）を除いて非対向
位置に形成したことを特徴とする薄膜磁気ヘッド。[Claims] A reproducing wire-wound thin film magnetic transducer (1) in which a gap layer (9) and a coil (11) are laminated with an interlayer insulating layer (13) interposed between magnetic poles (3, 4); A recording wire-wound thin film magnetic transducer (2) having the same structure as the thin film magnetic transducer (1) is disposed via an insulating layer (17), and both the thin film magnetic transducers (1, 2)
In the recording/reproducing separated type thin film magnetic head in which the magnetic pole tips of the two thin film magnetic transducers (1, 2) perform recording and reproducing on the same track of the recording medium, the magnetic poles (3) of the two thin film magnetic transducers (1, 2)
, 4, 5, and 6) are formed at non-opposing positions except for the magnetic pole tip (c).