JPH0223504A - Magnetic head - Google Patents

Magnetic head

Info

Publication number
JPH0223504A
JPH0223504A JP17085088A JP17085088A JPH0223504A JP H0223504 A JPH0223504 A JP H0223504A JP 17085088 A JP17085088 A JP 17085088A JP 17085088 A JP17085088 A JP 17085088A JP H0223504 A JPH0223504 A JP H0223504A
Authority
JP
Japan
Prior art keywords
gap
sendust
film
magnetic head
groove
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
JP17085088A
Other languages
Japanese (ja)
Inventor
Hirofumi Mochizuki
広文 望月
Hiromitsu Ito
浩光 伊藤
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.)
FDK Corp
Original Assignee
FDK 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 FDK Corp filed Critical FDK Corp
Priority to JP17085088A priority Critical patent/JPH0223504A/en
Publication of JPH0223504A publication Critical patent/JPH0223504A/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
    • G11B5/187Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features

Abstract

PURPOSE:To improve the adhering strength among a ferrite core, 'Sendust(R) film, and bonding glass so that the reliability and yield of a magnetic head can be improved by forming a groove at the interior part of the gap facing surface of the ferrite core fitted with the 'Sendust(R) film. CONSTITUTION:In a magnetic head in which a gap 3 is formed by combining two ferrite cores 1 and 2, a groove 1a having a recessed cross section is formed at the interior part of the gap facing surface of the core 1 and a 'Sendust(R) film 4 is continuously formed by sputtering, etc., not only over the mirror surface section 1b on the gap facing end face of the core 1, but also into the groove 1a. Therefore, the joining surface of the core 1 with the 'Sendust(R) film 4 is not a single plane, but three-dimensional multiple planes. As a result, the adhering strength of the 'Sendust(R) film 4 to the ferrite core 1 increases and, since bonding glass 6 also gets into the groove 1a, highly reliable high- accuracy magnetic head can be mass-produced with a high yield.

Description

【発明の詳細な説明】 (産業上の利用分野) この発明は、ハードディスク装置やフロッピーディスク
装置などに使用される磁気ヘッドに関し、特に、ギャッ
プに飽和磁束密度の大きいセンダスト膜を介在させるメ
タルインギャップ式の磁気ヘッドの改良に関する。
Detailed Description of the Invention (Field of Industrial Application) The present invention relates to a magnetic head used in hard disk drives, floppy disk drives, etc., and particularly relates to a metal-in-gap magnetic head in which a sendust film with a high saturation magnetic flux density is interposed in the gap. This invention relates to improvements in the magnetic head of the formula.

(従来の技術) 従来のメタルインギャップ式の磁気ヘッドのギャップ部
分の代表的な構造を第2図に示す。2つのフェライトコ
ア1と2を組合せてギャップ3を形成するのであるが、
一方のフェライトコア1のギャップ対向面にスパッタリ
ング等によって飽和磁束密度の高いセンダスト膜4を形
成しておくとともに、さらにセンダスト膜4の上に高融
点ガラス等からなるギャップスペーサ5を形成しておく
(Prior Art) FIG. 2 shows a typical structure of the gap portion of a conventional metal-in-gap type magnetic head. The gap 3 is formed by combining the two ferrite cores 1 and 2.
A sendust film 4 having a high saturation magnetic flux density is formed on the gap-opposing surface of one ferrite core 1 by sputtering or the like, and a gap spacer 5 made of high melting point glass or the like is further formed on the sendust film 4.

このフェライトコア1ともう一方フエライト2とを組合
せ、このこの部分を低融点ガラスからなるボンディング
ガラス6でもって接合する。
This ferrite core 1 and the other ferrite 2 are combined, and this part is bonded with a bonding glass 6 made of low melting point glass.

(発明が解決しようとする課題) ギャップ3を高精度に形成するために、フェライトコア
1および2のギャップ対向面は高精度に鏡面仕上されて
いる。そしてセンダスト膜4およびボンディングガラス
6はフェライトコア1の鏡面仕上部分に付着しており、
そのため付着強度が余り大きくない。最終的に磁気ヘッ
ドとして完成するまでの製造工程において、2つのフェ
ライトコア1と2間にはさまざまな力が作用し、ギャッ
プ3の部分から2つのコア1と2を引き離すような力も
作用する。このときフェライトコア1の鏡面部分とギャ
ップスペーサ5およびボンディングガラス6の付着強度
が余り大きくないため、この合せ面が比較的簡単に剥が
れやすく、歩留り低下の大きな原因になっていた。
(Problems to be Solved by the Invention) In order to form the gap 3 with high precision, the surfaces of the ferrite cores 1 and 2 facing the gap are mirror-finished with high precision. The sendust film 4 and the bonding glass 6 are attached to the mirror-finished portion of the ferrite core 1.
Therefore, the adhesion strength is not very high. During the manufacturing process until the magnetic head is finally completed, various forces act between the two ferrite cores 1 and 2, including a force that separates the two cores 1 and 2 from the gap 3. At this time, since the adhesion strength between the mirror surface portion of the ferrite core 1, the gap spacer 5, and the bonding glass 6 is not very strong, these mating surfaces tend to peel off relatively easily, which is a major cause of a decrease in yield.

この発明は上述した従来の問題点に鑑みなされたもので
、その目的は、フェライトコアとセンダスト膜およびボ
ンディングガラスの付着強度を高め、信頼性の高い高精
度な磁気ヘッドを歩留りよく量産できるようにすること
にある。
This invention was made in view of the above-mentioned conventional problems, and its purpose is to increase the adhesion strength between the ferrite core, sendust film, and bonding glass, and to mass-produce reliable and high-precision magnetic heads with high yield. It's about doing.

(課題を解決するための手段) そこでこの発明では、前記センダスト膜の付いているフ
ェライトコアのギャップ対向面の奥の部分に溝を形成し
ておき、この溝の内部にも前記センダスト膜および前記
ボンディングガラスを付着形成するようにした。
(Means for Solving the Problems) Therefore, in the present invention, a groove is formed in the deep part of the gap-opposing surface of the ferrite core to which the sendust film is attached, and the sendust film and the above-mentioned Bonding glass was attached and formed.

(作 用) 前記センダスト膜は鏡面仕上げされた単一平面上にのみ
付着形成されているのではなく、フェライトコアの前記
溝の内部にも付着形成されている。
(Function) The sendust film is not only deposited on a single mirror-finished plane, but also deposited inside the groove of the ferrite core.

そのためフェライトコアのセンダスト膜との接合面は単
一平面ではなく、3次元の多面になる。また前記溝の内
面を鏡面仕上げする必要はまったくなく、粗面のままで
良い。以上の結果、前記センダスト膜のフェライトコア
に対する付着強度は非常に大きくなり、この合せ面が剥
がれにくくなる。
Therefore, the bonding surface between the ferrite core and the sendust film is not a single plane, but a three-dimensional polygon. Further, there is no need to mirror finish the inner surface of the groove, and it is sufficient to leave it as a rough surface. As a result of the above, the adhesion strength of the sendust film to the ferrite core becomes very high, and this mating surface becomes difficult to peel off.

(実施例) 第1図は本発明の一実施例による磁気ヘッドの。(Example) FIG. 1 shows a magnetic head according to an embodiment of the present invention.

ギャップ部分の構造を示している。基本的には第2図の
ものと同様で、2つのフェライトコア1と2を組合せて
ギャップ3を形成するのであるが、ストレートな棒状の
フェライトコア1のギャップ対向面にスパッタリングに
よって飽和磁束密度の高いセンダスト膜4を形成し、さ
らにセンダスト膜4の上にスパッタリング等によって安
定化ジルコニアまたはアルミナからなる所定厚さのギャ
ップスペーサ5を形成しておく。このフェライトコア1
ともう一方のフェライトコア2とを組合せ、この部分を
低融点ガラスからなるボンディングガラス6でもって接
合する。
It shows the structure of the gap part. Basically, it is the same as the one in Figure 2, and the gap 3 is formed by combining two ferrite cores 1 and 2, but the saturation magnetic flux density is reduced by sputtering on the surface of the straight rod-shaped ferrite core 1 facing the gap. A high sendust film 4 is formed, and a gap spacer 5 of a predetermined thickness made of stabilized zirconia or alumina is further formed on the sendust film 4 by sputtering or the like. This ferrite core 1
and the other ferrite core 2 are combined, and this part is bonded with bonding glass 6 made of low melting point glass.

本発明の特徴とする部分は、フェライトコア1のギャッ
プ対向面の奥の部分に断面凹型の溝1aを形成し、ギャ
ップ先端側の鏡面部分1bだけでなく溝1aの内部にま
でわたる範囲に連続して、スパッタリング等によりセン
ダスト膜4を形成している点である。また、ボンディン
グガラス6もフェライトコア1の溝1a内に充填されて
いる。
The characteristic feature of the present invention is that a groove 1a with a concave cross section is formed in the deep part of the gap-opposing surface of the ferrite core 1, and is continuous in a range that extends not only to the mirrored part 1b on the tip side of the gap but also to the inside of the groove 1a. Then, the sendust film 4 is formed by sputtering or the like. Further, the bonding glass 6 is also filled in the groove 1a of the ferrite core 1.

(発明の効果) 以上詳細に説明したように、この発明に係る磁気ヘッド
の場合、ギャップ部に介在するセンダスト膜およびボン
ディングガラスはギャップの奥方においてフェライトコ
アに形成されている溝部分にも付着形成されているので
、センダスト膜とフェライトコアとの付着強度は従来に
比べて十分大きくなり、この合せ面から剥がれるという
不良品の発生率は大幅に低減する。従って高性能で信頼
性の高いメタルインギャップ式の磁気ヘッドを歩留りよ
く量産することができる。
(Effects of the Invention) As explained above in detail, in the case of the magnetic head according to the present invention, the sendust film and bonding glass interposed in the gap are also attached to the groove portion formed in the ferrite core at the back of the gap. As a result, the adhesion strength between the sendust film and the ferrite core is sufficiently increased compared to the conventional method, and the incidence of defective products that peel off from this mating surface is greatly reduced. Therefore, high-performance, highly reliable metal-in-gap magnetic heads can be mass-produced with high yield.

【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よる磁気ヘッドのギャップ
部分の拡大図、第2図は従来の磁気ヘッドのギャップ部
分の拡大図である。 1・・・・・・フェライトコア 2・・・・・・フェライトコア 3・・・・・・ギャップ 4・・・・・・センダスト膜 5・・・・・・ギャップスペーサ 6・・・・・・ボンディングガラス 1a・・・溝 1b・・・鏡面部分
FIG. 1 is an enlarged view of a gap portion of a magnetic head according to an embodiment of the present invention, and FIG. 2 is an enlarged view of a gap portion of a conventional magnetic head. 1... Ferrite core 2... Ferrite core 3... Gap 4... Sendust film 5... Gap spacer 6...・Bonding glass 1a...Groove 1b...Mirror surface part

Claims (1)

【特許請求の範囲】[Claims] (1)ギャップを構成すべく組合された2つのフェライ
トコアの少なくとも一方のギャップ対向面にセンダスト
膜が形成されているとともに、両フェライトコアのギャ
ップ部分がボンディングガラスで接合された磁気ヘッド
であって、前記センダスト膜の付いている前記コアのギ
ャップ対向面における奥の部分には溝が形成されており
、前記センダスト膜および前記ボンディングガラスは前
記溝内にも付着形成されていることを特徴とする磁気ヘ
ッド。
(1) A magnetic head in which a sendust film is formed on at least one gap-opposing surface of two ferrite cores combined to form a gap, and the gap portion of both ferrite cores is bonded with bonding glass. A groove is formed in a deep part of the gap-opposing surface of the core to which the sendust film is attached, and the sendust film and the bonding glass are also adhered and formed within the groove. magnetic head.
JP17085088A 1988-07-11 1988-07-11 Magnetic head Pending JPH0223504A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17085088A JPH0223504A (en) 1988-07-11 1988-07-11 Magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17085088A JPH0223504A (en) 1988-07-11 1988-07-11 Magnetic head

Publications (1)

Publication Number Publication Date
JPH0223504A true JPH0223504A (en) 1990-01-25

Family

ID=15912480

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17085088A Pending JPH0223504A (en) 1988-07-11 1988-07-11 Magnetic head

Country Status (1)

Country Link
JP (1) JPH0223504A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9445390B2 (en) * 2012-10-10 2016-09-13 Telefonaktiebolaget Lm Ericsson (Publ) Method and node for positioning in combined cell

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9445390B2 (en) * 2012-10-10 2016-09-13 Telefonaktiebolaget Lm Ericsson (Publ) Method and node for positioning in combined cell

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