JPS62145527A - Compound type thin film magnetic head - Google Patents

Compound type thin film magnetic head

Info

Publication number
JPS62145527A
JPS62145527A JP28646285A JP28646285A JPS62145527A JP S62145527 A JPS62145527 A JP S62145527A JP 28646285 A JP28646285 A JP 28646285A JP 28646285 A JP28646285 A JP 28646285A JP S62145527 A JPS62145527 A JP S62145527A
Authority
JP
Japan
Prior art keywords
magnetic head
thin film
film magnetic
magnetic
type thin
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
Application number
JP28646285A
Other languages
Japanese (ja)
Inventor
Sadaichi Miyauchi
貞一 宮内
Mitsuhiko Yoshikawa
吉川 光彦
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.)
Sharp Corp
Original Assignee
Sharp Corp
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 Sharp Corp filed Critical Sharp Corp
Priority to JP28646285A priority Critical patent/JPS62145527A/en
Publication of JPS62145527A publication Critical patent/JPS62145527A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G11INFORMATION STORAGE
    • G11BINFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127Structure or manufacture of heads, e.g. inductive
    • G11B5/33Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/39Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
    • G11B5/3903Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures

Landscapes

  • Magnetic Heads (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)

Abstract

PURPOSE:To prevent extremely the loading of a stress on the upper side an MR element, and to prevent the deterioration of the magnetic characteristic of the MR element and a yoke by arranging a magnetic induction type thin film magnetic head at the lower side and an MR type thin film magnetic head at the lower side and an MR type thin film magnetic head at the upper side and using the upper side core of the magnetic induction type thin film magnetic head together with the lower side core of the MR type thin film magnetic head. CONSTITUTION:At the lower side, a magnetic induction type thin film magnetic head A is laminated, and at the upper side, a yoke type MR type thin film magnetic head B is laminated. For winding coils 6 and 7, a recording electric current is energized at the time of recording, and at the time of reproduction, the bias electric current to give a bias magnetic field to an MR element 8 is energized. When the recording electric current is energized to the coil 7, the MR element 8 is several hundred Angstrom magnetic films, magnetically saturated, a magnetic permeability is close to 1, at an upper side yoke 1, the magnetic flux will not flow, and the magnetic pattern on the recording media is not disturbed. The influence of a response to the MR element 8 and the yoke 1 is hard to be received since the element is not formed on them.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明は磁気ディスク装置、磁気テープ装置等の磁気記
録再生を行なうことができる複合型薄膜磁気ヘッドの構
造に関する。
DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to the structure of a composite thin film magnetic head capable of performing magnetic recording and reproduction in magnetic disk devices, magnetic tape devices, and the like.

〈従来の技術〉 従来、薄膜磁気ヘッドは磁気誘導型の巻線タイプのヘッ
ドで記録を行ない、再生ら同じヘッドで行なうために、
磁気コア内に通す導体コイルの数を多くする必要があっ
たが、薄膜形成技術を使用しているため困難であった。
<Prior Art> Conventionally, thin-film magnetic heads use a magnetic induction wire-wound type head for recording and playback using the same head.
It was necessary to increase the number of conductor coils passed through the magnetic core, but this was difficult because thin film formation technology was used.

−力強磁性薄膜の磁気抵抗効果(以下、MRと称ずろ)
を利用した薄膜磁気ヘッドは前記巻線タイプのヘッドに
比較して多くの利点を存することが知られている。すな
わら、磁気記録媒体の移送速度が低い場合で乙、磁束に
直接比例した出力が得られろため、移送速度に依存せず
に信号の再生が可能であり、移送速度が低い場合でも巻
線型の磁気ヘッドよりも高出力の再生信号が得られると
いう利点を備えている。
- Magnetoresistive effect of strong ferromagnetic thin film (hereinafter referred to as MR)
It is known that a thin film magnetic head using a magnetic head has many advantages over the above-mentioned wire-wound type head. In other words, when the transport speed of the magnetic recording medium is low, since an output directly proportional to the magnetic flux can be obtained, it is possible to reproduce the signal regardless of the transport speed, and even when the transport speed is low, the winding It has the advantage that a higher output reproduction signal can be obtained than a linear magnetic head.

また実際の使用に際してはMR素子単体で薄膜磁気ヘッ
ドを構成するよりもM RT=子部をヘッド先端から離
し、磁気記録媒体にて発生した磁束をMR素子部まで導
く磁束導入路(以下、ヨークと弥する)を配置したヨー
クタイプMRヘッドと呼ばれる薄膜磁気ヘッドの方が信
号の分解能の向上やMR水素子耐久性の向上に有効であ
り、近年このタイプのヘッドが固定ヘッド・ディジタル
オーディオ用再生ヘッドとして注目されている。(たと
えば日本応用磁気学会第39回研究会資料P61−27
2「薄膜MRヘッド」参照) このように記録は従来の巻線タイプの薄膜磁気ヘッドを
用い、再生はヨークタイプMRヘッドを用いるのが高品
位な磁気記録再生を実現するのに最適と考えられる。
In addition, in actual use, rather than constructing a thin-film magnetic head with a single MR element, the MRT (receiver section) is separated from the head tip, and a magnetic flux introduction path (hereinafter referred to as a yoke) that guides the magnetic flux generated in the magnetic recording medium to the MR element section is used. A thin-film magnetic head called a yoke-type MR head, which has a yoke type MR head, is more effective in improving signal resolution and MR hydrogen durability, and in recent years this type of head has become popular for fixed-head digital audio playback. It is attracting attention as a head. (For example, Japanese Society of Applied Magnetics, 39th Research Meeting Material P61-27
2 "Thin Film MR Head") In this way, it is considered optimal to use a conventional wire-wound type thin film magnetic head for recording and a yoke type MR head for reproduction to achieve high-quality magnetic recording and reproduction. .

ところが、これら2つのヘッドを別々に製作して組み合
わせた複合型磁気ヘッドはトラック中が狭い場合、記録
トラックと再生トラックの位置合わU・が困難となる。
However, in a composite magnetic head in which these two heads are manufactured separately and combined, if the inside of the track is narrow, it becomes difficult to align the recording track and the reproduction track.

また従来知られている複合型薄膜磁気ヘッドではMRタ
イプの薄膜磁気ヘッドの上に巻線タイプの薄膜磁気ヘッ
ドを積み重ねた形が知られているが、MR水素子下側に
し7こ場合、MR水素子上側に形成され1こ巻線タイプ
の薄膜磁気ヘッドからの応力を受けて、MR水素子ヨー
クの磁気特性か劣化するという問題がある。まンMR素
子のバイアス用導体は記録用ヘッドコイル導体と独立で
あるため、構造が複雑であるという問題がある。
Furthermore, conventionally known composite thin-film magnetic heads are known to have a wire-wound thin-film magnetic head stacked on top of an MR-type thin-film magnetic head. There is a problem in that the magnetic properties of the MR hydrogen element yoke deteriorate due to stress from the single winding type thin film magnetic head formed above the hydrogen element. Since the bias conductor of the magnetic resonance element is independent from the recording head coil conductor, there is a problem in that the structure is complicated.

〈発明の目的〉 そこで、本発明の目的(よMR索子の上側に極力応力が
かからないようにして、MR水素子ヨークの磁気特性の
劣化を防止でき、かつ、構造が簡単な複合型薄膜磁気ヘ
ッドを提供することにある。
<Objective of the Invention> Therefore, the object of the present invention is to provide a composite thin film magnetic material which can prevent deterioration of the magnetic properties of the MR hydrogen yoke by minimizing stress on the upper side of the MR yoke, and which has a simple structure. The purpose is to provide the head.

〈発明の構成〉 前記目的を達成するため、本発明の複合型薄膜磁気ヘッ
ドは、MR水素子上側に応力がかからないようにすべく
、下側に社気誘導型薄膜磁気ヘッドを、上側にMR型薄
膜磁気ヘッドを配置し、その磁気誘導型薄膜磁気ヘッド
の上側コアを前記MR型薄膜磁気ヘッドの下側コアに兼
用したことを特徴としている。
<Structure of the Invention> In order to achieve the above object, the composite thin film magnetic head of the present invention has a magnetic induction type thin film magnetic head on the lower side and an MR magnetic head on the upper side in order to prevent stress from being applied to the upper side of the MR hydrogen element. MR type thin film magnetic head is arranged, and the upper core of the magnetic induction type thin film magnetic head is also used as the lower core of the MR type thin film magnetic head.

また、前記磁気誘導型薄膜磁気ヘッドの巻線コイルを前
記MR型薄膜磁気ヘッドのMR水素子バイアス用導体に
兼用するのが好ましい。
Further, it is preferable that the winding coil of the magnetic induction type thin film magnetic head is also used as an MR hydrogen element bias conductor of the MR type thin film magnetic head.

〈作用〉 上記構成により、MR水素子MR型薄膜磁気ヘッドの上
側ヨークが応力を受けにくくなり、MR水素子上側ヨー
クの磁気特性の劣化が防止され、かつ、構造が簡単にな
り、コストダウンされる。
<Function> With the above configuration, the upper yoke of the MR hydrogen element MR type thin film magnetic head is less susceptible to stress, the deterioration of the magnetic properties of the MR hydrogen element upper yoke is prevented, and the structure is simplified and costs are reduced. Ru.

また、前記磁気誘導型薄膜磁気ヘッドの巻線コイルをM
R型薄膜磁気ヘッドのMR水素子バイアス用導体に兼用
すれば、構造が簡単になり、コストダウンされる。
Further, the winding coil of the magnetic induction type thin film magnetic head is M
If it is also used as an MR hydrogen bias conductor for an R-type thin film magnetic head, the structure will be simplified and costs will be reduced.

〈実施例〉 第1図は本発明の一実施例の曳台型薄膜磁気ヘッドのト
ランクの幅方向と垂直な方向の断面構造を示す模式図で
あり、この曳合型薄膜磁気ヘッドは下側に磁気誘導型薄
膜磁気ヘッド八を、上側にヨークタイプMR型薄膜磁気
ヘッドBを積層してなる。第1図において、5は磁気誘
導型簿膜磁気ヘッドへの磁性体基板で、通常Mn  Z
nフェライトかNi−Znフェライトを用いる。また、
前記磁性体基板5に巻線コイル6を埋めこむために溝9
を設けである。前記コイル6は第2図のように後述する
コイル7と連なって巻回され、Cu、 A(!−Cuな
とで作られる。前記溝9は低融点ガラス等で埋められ、
下側磁性体基板5とコイル6との距離を遠ざけて、記録
時に中央のヨーク3から下側磁性体基板5への磁束の漏
れを抑えろことかできる。
<Embodiment> FIG. 1 is a schematic diagram showing the cross-sectional structure of a towing type thin film magnetic head in a direction perpendicular to the width direction of the trunk of an embodiment of the present invention. A magnetic induction type thin film magnetic head 8 is stacked on the upper side, and a yoke type MR type thin film magnetic head B is stacked on the upper side. In FIG. 1, 5 is a magnetic substrate for the magnetic induction type film magnetic head, which is usually made of Mn Z
Use n-ferrite or Ni-Zn ferrite. Also,
A groove 9 is formed in order to embed the winding coil 6 in the magnetic substrate 5.
This is provided. The coil 6 is wound in series with a coil 7, which will be described later, as shown in FIG. 2, and is made of Cu, A(!-Cu, etc.).
It is possible to increase the distance between the lower magnetic substrate 5 and the coil 6 to suppress leakage of magnetic flux from the central yoke 3 to the lower magnetic substrate 5 during recording.

前記中央のヨーク3は磁性体からなり、記録、再生に兼
用するもので、通常パーマロイやセンダストのスパッタ
リング膜やメッキ膜か使用される。
The central yoke 3 is made of a magnetic material and is used for both recording and reproduction, and is usually made of a sputtered film or a plated film of Permalloy or Sendust.

4は記録用ヘッドギャップ部で、5iOzなどの絶縁物
22で満たされる。記録時には下側磁性体基板5と中央
のヨーク3を巻線コイル6.7で発生した磁界によって
磁化し、記録用へソドギャップ11に記録磁界を発生さ
せる。記録用ヘッドキャップ4は高密度記録のために0
.5μm以下であり、そのため下側磁性体基板5の後側
で中央のヨーク3との接合は容易に行なえる。溝9は低
融点ガラスや5in2なとの絶縁物21で満たす。巻線
コイル6.7に流す電流の経路は第2図に示す様に中央
ヨーク3のまわりを周回した形となる。また、1はヨー
クタイプのMR型薄膜磁気ヘッドBの上側ヨークであり
、通常パーマロイやCoZrアモルファス膜などの高透
磁率磁性体をスパッタリングやメッキ、蒸着の方法で成
膜したものを用いる。
4 is a recording head gap portion filled with an insulator 22 such as 5 iOz. During recording, the lower magnetic substrate 5 and the central yoke 3 are magnetized by the magnetic field generated by the winding coil 6.7, and a recording magnetic field is generated in the recording gap 11. The recording head cap 4 is 0 for high-density recording.
.. The thickness is 5 μm or less, and therefore, the bonding with the central yoke 3 on the rear side of the lower magnetic substrate 5 can be easily performed. The groove 9 is filled with an insulator 21 such as low melting point glass or 5in2. The path of the current flowing through the winding coil 6.7 is in the form of a circuit around the central yoke 3, as shown in FIG. Reference numeral 1 designates the upper yoke of the yoke type MR type thin film magnetic head B, which is usually made of a high permeability magnetic material such as permalloy or CoZr amorphous film formed by sputtering, plating, or vapor deposition.

25.26,27f;l:絶縁膜で、通常5i02など
のスパッタ膜が用いられる。8はMR素子で一軸異方性
を存するパーマロイを蒸着などで成膜したしのであり、
絶縁膜26.27で被覆されている。
25.26, 27f; l: Insulating film, usually a sputtered film such as 5i02. 8 is an MR element in which a permalloy film with uniaxial anisotropy is formed by vapor deposition.
It is covered with insulating films 26 and 27.

MR素子8の巾はIOμm程度、膜厚は数百人である。The width of the MR element 8 is about IO μm, and the film thickness is several hundred.

2はヨークタイプのMR型薄膜磁気ヘッドの分解能を決
める再生用へラドギャップで、0゜5μm以下程度であ
る。7はMR素子8にバイアス磁界を発生させると共に
、記録時には巻線コイルとなる導体で、Cu、AQ−C
uなどが用いられる。
Reference numeral 2 denotes a read gap which determines the resolution of the yoke type MR type thin film magnetic head, and is approximately 0.5 μm or less. 7 is a conductor that generates a bias magnetic field in the MR element 8 and serves as a winding coil during recording, and is made of Cu, AQ-C.
u etc. are used.

本発明では巻線コイル6.7は記録時には記録電流が通
電され、再生時にはMR素子8にバイアス磁界を与える
ためのバイアス電流が通電される。
In the present invention, a recording current is applied to the winding coil 6.7 during recording, and a bias current for applying a bias magnetic field to the MR element 8 is applied during reproduction.

それに関連する問題として、まオ゛記録時に記録用へラ
ドギャップ4から発生オろ記録磁界とは別に再生用のへ
ラドギャップ2に磁界が発生し、記録用ヘッドギャップ
4て記録された記録媒体−ヒの磁化パターンが乱される
可能性がある。しかし本発明ではコイル7に記録電流が
通電されたときはMR素子8は数百人の磁性膜であり、
磁気的に飽和して透磁率が1に近づく。そのため上側ヨ
ーク1には磁束が流れず、再生用へラドギャップ2にム
磁界が発生せず、上記の問題は生じない。また、再生時
にMR索子8にバイアス磁界を与えるためのバイアス電
流による記録用へラドギャップ4に発生する磁界によっ
て記録媒体上の磁化パタ一ンが乱される可能性があるが
、バイアス電流値が小さいため、記録用へラドギャップ
4に発生オる記録磁界は微弱であり、上記の問題は発生
しない。
A related problem is that during recording, a magnetic field is generated in the head gap 2 for reproduction in addition to the recording magnetic field generated from the head gap 4 for recording, and the recording medium is recorded using the head gap 4 for recording. - The magnetization pattern of H may be disturbed. However, in the present invention, when the recording current is applied to the coil 7, the MR element 8 is a magnetic film of several hundred.
Magnetically saturated and magnetic permeability approaches 1. Therefore, no magnetic flux flows through the upper yoke 1, and no magnetic field is generated in the reproducing head gap 2, so that the above-mentioned problem does not occur. In addition, the magnetization pattern on the recording medium may be disturbed by the magnetic field generated in the recording gap 4 by the bias current for applying a bias magnetic field to the MR probe 8 during reproduction, but the bias current value Since this is small, the recording magnetic field generated in the recording head gap 4 is weak, and the above problem does not occur.

また、従来技術で述べたMR索子8やヨークlへの応力
の影響はそれらの上に素子が形成されないため、応力の
影響を受けにくく、それらの磁気特性の劣化を防止でき
る。また、中央のヨーク3を磁気誘導型薄膜磁気ヘッド
AとヨークタイプMR型薄膜磁気ヘッドBに兼用してい
るので、構造が簡単になる。
Furthermore, since no element is formed on the MR cord 8 and yoke l described in the prior art, they are less susceptible to the influence of stress, and deterioration of their magnetic properties can be prevented. Further, since the central yoke 3 is used for both the magnetic induction type thin film magnetic head A and the yoke type MR type thin film magnetic head B, the structure is simplified.

なお、下側磁性体基板5はNi−Znフェライト、Mr
+−Znフェライトなどで形成されるため、高保磁力H
c−15000e程度の記録媒体に記録する際、下側磁
性体基板5の飽和磁束密度の大きさが問題となる。その
場合は第3図に示す実施例の様にフェライトなどの下側
磁性体基板5の上にセンダストなどの高い飽和磁束密度
を有する材料IIを被着すれば、高い保磁力を有する記
録媒体にも記録可能となる。あるいは第4図のように平
坦なNi−Znフェライト、Mn−Znフェライト磁性
基板12の上にセンダストなどの高い飽和磁束密度を有
する材料13を被着後、孔14を形成する。
Note that the lower magnetic substrate 5 is made of Ni-Zn ferrite, Mr.
+- Since it is formed from Zn ferrite, it has a high coercive force H.
When recording on a recording medium of approximately C-15000e, the saturation magnetic flux density of the lower magnetic substrate 5 becomes a problem. In that case, if a material II having a high saturation magnetic flux density such as Sendust is deposited on the lower magnetic substrate 5 such as ferrite as in the embodiment shown in FIG. can also be recorded. Alternatively, as shown in FIG. 4, a material 13 having a high saturation magnetic flux density such as Sendust is deposited on a flat Ni--Zn ferrite or Mn--Zn ferrite magnetic substrate 12, and then holes 14 are formed.

その後、溝9と同様に低融点ガラス29などで孔14を
埋めた後、導体6を形成する。このようにすれば第3図
のようなF/l 9は必要としない。
After that, similarly to the groove 9, the hole 14 is filled with low melting point glass 29 or the like, and then the conductor 6 is formed. In this way, F/l 9 as shown in FIG. 3 is not required.

〈発明の効果〉 以上より明らかな如く、本発明によれば、MR素子およ
び上側のヨークが応力を受けにくく、磁気特性の劣化が
防止でき、かつ構造を簡単にでき、コストダウンできる
<Effects of the Invention> As is clear from the above, according to the present invention, the MR element and the upper yoke are less susceptible to stress, deterioration of magnetic properties can be prevented, and the structure can be simplified and costs can be reduced.

また、MR素子にバイアス磁界を与えるためのバイアス
導体を記録用巻線コイルに兼用すれば、さらに構造を簡
単にでき、コストダウンできる。
Further, if the bias conductor for applying a bias magnetic field to the MR element is also used as the recording winding coil, the structure can be further simplified and costs can be reduced.

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

第1図は本発明の1実施例の複合型薄膜磁気ヘッドの断
面構造を示す模式図である。第2図は巻線コイル7と中
央のヨーク3との関係を示す模式図である。第3図、第
4図は夫々、第1図の実施例に変形を加えた他の実施例
の模式図である。 l・・・」二(間のヨーク、 2・・・再生用へラドギャップ、3・・中央のヨーク、
4・・・記録用ヘノドギャップ、 5・・下側磁性体基板、6,7 コイル、2’l、22
.25,26.27  ・絶縁物、11.13・・高飽
和磁束密度磁性体、12・・・磁性体基板。
FIG. 1 is a schematic diagram showing the cross-sectional structure of a composite thin film magnetic head according to an embodiment of the present invention. FIG. 2 is a schematic diagram showing the relationship between the winding coil 7 and the central yoke 3. 3 and 4 are schematic diagrams of other embodiments that are modified from the embodiment of FIG. 1, respectively. l...'2 (Yoke between, 2... Rad gap for regeneration, 3... Center yoke,
4... Henod gap for recording, 5... Lower magnetic substrate, 6, 7 Coil, 2'l, 22
.. 25, 26.27 - Insulator, 11.13... High saturation magnetic flux density magnetic material, 12... Magnetic substrate.

Claims (3)

【特許請求の範囲】[Claims] (1)磁気誘導型薄膜磁気ヘッドと磁気抵抗効果型薄膜
磁気ヘッドを上下に積層した複合型薄膜磁気ヘッドにお
いて、 下側に磁気誘導型薄膜磁気ヘッドを配置し、その磁気誘
導型薄膜磁気ヘッドの上側コアを前記磁気抵抗効果型薄
膜磁気ヘッドの下側コアに兼用したことを特徴とする複
合型薄膜磁気ヘッド。
(1) In a composite thin-film magnetic head in which a magneto-induction thin-film magnetic head and a magnetoresistive thin-film magnetic head are stacked vertically, the magneto-induction thin-film magnetic head is placed on the bottom, and the magneto-induction thin-film magnetic head is A composite thin-film magnetic head characterized in that the upper core also serves as the lower core of the magnetoresistive thin-film magnetic head.
(2)前記磁気抵抗効果型薄膜磁気ヘッドをヨークタイ
プ磁気抵抗効果型薄膜磁気ヘッドとしたことを特徴とす
る特許請求の範囲第1項に記載の複合型薄膜磁気ヘッド
(2) The composite thin film magnetic head according to claim 1, wherein the magnetoresistive thin film magnetic head is a yoke type magnetoresistive thin film magnetic head.
(3)前記磁気誘導型薄膜磁気ヘッドの巻線コイルを前
記磁気抵抗効果型薄膜磁気ヘッドの磁気抵抗効果素子の
バイアス用導体に兼用したことを特徴とする特許請求の
範囲第1項に記載の複合型薄膜磁気ヘッド。
(3) The winding coil of the magneto-inductive thin-film magnetic head is also used as a bias conductor of a magnetoresistive element of the magnetoresistive thin-film magnetic head. Composite thin film magnetic head.
JP28646285A 1985-12-18 1985-12-18 Compound type thin film magnetic head Pending JPS62145527A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP28646285A JPS62145527A (en) 1985-12-18 1985-12-18 Compound type thin film magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP28646285A JPS62145527A (en) 1985-12-18 1985-12-18 Compound type thin film magnetic head

Publications (1)

Publication Number Publication Date
JPS62145527A true JPS62145527A (en) 1987-06-29

Family

ID=17704702

Family Applications (1)

Application Number Title Priority Date Filing Date
JP28646285A Pending JPS62145527A (en) 1985-12-18 1985-12-18 Compound type thin film magnetic head

Country Status (1)

Country Link
JP (1) JPS62145527A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301823A2 (en) * 1987-07-29 1989-02-01 Digital Equipment Corporation Three-pole magnetic recording head
JPH0291807A (en) * 1988-09-28 1990-03-30 Sanyo Electric Co Ltd Composite thin-film magnetic head
EP0414473A2 (en) * 1989-08-24 1991-02-27 Matsushita Electric Industrial Co., Ltd. Magnetic head device
EP0516022A2 (en) * 1991-05-30 1992-12-02 Matsushita Electric Industrial Co., Ltd. Integrated thin film magnetic head
EP0519674A2 (en) * 1991-06-20 1992-12-23 Matsushita Electric Industrial Co., Ltd. Laminated magneto-resistive head
US5270895A (en) * 1991-07-05 1993-12-14 U.S. Philips Corporation Combined read/write thin-film magnetic head with composite shared flux guide
US6259585B1 (en) 1997-01-25 2001-07-10 Tdk Corporation Inverted hybrid thin film magnetic head and method of manufacturing the same

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0301823A2 (en) * 1987-07-29 1989-02-01 Digital Equipment Corporation Three-pole magnetic recording head
EP0301823A3 (en) * 1987-07-29 1991-10-16 Digital Equipment Corporation Three-pole magnetic recording head
JPH0291807A (en) * 1988-09-28 1990-03-30 Sanyo Electric Co Ltd Composite thin-film magnetic head
EP0414473A2 (en) * 1989-08-24 1991-02-27 Matsushita Electric Industrial Co., Ltd. Magnetic head device
EP0516022A2 (en) * 1991-05-30 1992-12-02 Matsushita Electric Industrial Co., Ltd. Integrated thin film magnetic head
US5535079A (en) * 1991-05-30 1996-07-09 Fukazawa; Toshio Integrated thin film magnetic head
EP0519674A2 (en) * 1991-06-20 1992-12-23 Matsushita Electric Industrial Co., Ltd. Laminated magneto-resistive head
EP0519674A3 (en) * 1991-06-20 1994-06-22 Matsushita Electric Ind Co Ltd Lamination type magneto-resistive head
US5270895A (en) * 1991-07-05 1993-12-14 U.S. Philips Corporation Combined read/write thin-film magnetic head with composite shared flux guide
US6259585B1 (en) 1997-01-25 2001-07-10 Tdk Corporation Inverted hybrid thin film magnetic head and method of manufacturing the same
US6542339B1 (en) 1997-01-25 2003-04-01 Tdk Corporation Inverted hybrid thin film magnetic head and method of manufacturing the same

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