JPS62287411A - Thin film magnetic head - Google Patents

Thin film magnetic head

Info

Publication number
JPS62287411A
JPS62287411A JP13083886A JP13083886A JPS62287411A JP S62287411 A JPS62287411 A JP S62287411A JP 13083886 A JP13083886 A JP 13083886A JP 13083886 A JP13083886 A JP 13083886A JP S62287411 A JPS62287411 A JP S62287411A
Authority
JP
Japan
Prior art keywords
recording
thin film
edges
magnetic poles
magnetic head
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
JP13083886A
Other languages
Japanese (ja)
Inventor
Takaaki Watanabe
渡邉　敬明
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Priority to JP13083886A priority Critical patent/JPS62287411A/en
Publication of JPS62287411A publication Critical patent/JPS62287411A/en
Pending legal-status Critical Current

Links

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
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/3116—Shaping of layers, poles or gaps for improving the form of the electrical signal transduced, e.g. for shielding, contour effect, equalizing, side flux fringing, cross talk reduction between heads or between heads and information tracks

Landscapes

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

Abstract

PURPOSE:To eliminate undershoot to eliminate waveform defects and the degradation in resolution by forming edges of magnetic poles, which form a recording and reproducing gap, and the other edges of magnetic poles nonparallel with each other. CONSTITUTION:A thin film magnetic head 1 consists of two upper and lower magnetic poles 11 and 12 and a recording and reproducing gap 13 interposed between magnetic poles 11 and 12. Edges 14 and 15 of magnetic poles which form the recording and reproducing gap 13 are made nonparallel with the other edges. Since edges 14 and 15 are nonparallel with edges 16 and 17, the effect that magnetic poles 11 and 12 are infinitely extended equivalently in comparison with the length of the gap 13 is attained, and undershoot does not occur and the recording density characteristic is made flat.

Description

【発明の詳細な説明】 ３、発明の詳細な説明 〔産業上の利用分野〕 本発明は、高密度記録用の薄膜磁気ヘッドに関する。[Detailed description of the invention] 3. Detailed description of the invention [Industrial application field] The present invention relates to a thin film magnetic head for high density recording.

〔従来の技術〕[Conventional technology]

近年、ますます高密度大答量化の方向にるる、磁気ディ
スク装置等の磁気記録装置において、記録密度の向上に
は、ビット密度とトラック密度との双方の向上が必要で
ある。このような磁気記録装置に使用される薄製磁気ヘ
ッド１０は、従米第３図および第４図に示すように、上
下２つの磁極２１、２２　　の間にコイル２８を形成し
た構造となっていた。さらに従来型薄膜ヘッドは、２つ
の磁極２１．２２　の厚さと記録再生ギャップ２３の長
さを、記録媒体に対向する面内において均一になるよう
に形成していた。In recent years, in magnetic recording devices such as magnetic disk drives, which have become increasingly dense and have a large capacity, it is necessary to improve both bit density and track density in order to improve recording density. The thin magnetic head 10 used in such a magnetic recording device has a structure in which a coil 28 is formed between two upper and lower magnetic poles 21 and 22, as shown in FIGS. 3 and 4. . Further, in the conventional thin film head, the thickness of the two magnetic poles 21 and 22 and the length of the recording/reproducing gap 23 are formed to be uniform in the plane facing the recording medium.

しかしながら、上記従来型薄膜磁気ヘッドにより、孤立
波を記録再生した場合第５図に示すように、薄膜磁気ヘ
ッドの磁極形状効果として良く知られた、磁極の外側の
縁付近でアンダーシュートを生ずる。さらに再生出力の
記録密度特性は第６図に示すように凹凸を生ずる。これ
は磁極の厚みと対応しており、アンダーシュートの干渉
トして生ずる。However, when solitary waves are recorded and reproduced using the conventional thin film magnetic head, as shown in FIG. 5, an undershoot occurs near the outer edge of the magnetic pole, which is well known as the magnetic pole shape effect of the thin film magnetic head. Furthermore, the recording density characteristics of the reproduced output have irregularities as shown in FIG. This corresponds to the thickness of the magnetic pole and is caused by undershoot interference.

これらは、記録、再生特性上、波形不良、分解能劣化等
の原因となり、回路による補正な行なっても完全とは言
えず、また装置は高価なものになった。These problems cause waveform defects and resolution deterioration in recording and reproducing characteristics, and even if corrections are made using circuits, they cannot be said to be perfect, and the apparatus becomes expensive.

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

従って、本発明の目的は、アンダーシュートをなくし、
波形不良、分解能劣化を解決し得る薄膜磁気ヘッドを提
供することにある。Therefore, it is an object of the present invention to eliminate undershoot and
It is an object of the present invention to provide a thin film magnetic head that can solve the problems of waveform defects and resolution deterioration.

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

本発明の薄膜磁気ヘッドは、記録再生ギャップを形成す
る磁極のエツジと、前記磁極の他の一方のエツジが非平
行であることを特徴とする。The thin film magnetic head of the present invention is characterized in that the edge of the magnetic pole forming the recording/reproducing gap and the other edge of the magnetic pole are non-parallel.

〔実施例〕〔Example〕

次に本発明の一実施例について、図「［Ｔを参照して説
明する。Next, an embodiment of the present invention will be described with reference to the figure "[T.

第１図は、本発明による薄膜磁気ヘッドの記録再生ギャ
ップを含む、磁極部を記録媒体側から見た平面図である
。第１図において、本実施例の薄膜磁気ヘッドｌは、上
下２つの磁極１１．１２と、磁極１１．１２に挾まれ、
形成された記録再生ギャップ１３とより構成される。さ
らに記録再生ギャップ１３を形成する磁極のエツジ１４
及び１５と他の一方のエツジ１６．１７　　は非平行で
ある。FIG. 1 is a plan view of a magnetic pole portion including a recording/reproducing gap of a thin film magnetic head according to the present invention, viewed from the recording medium side. In FIG. 1, the thin film magnetic head l of this embodiment is sandwiched between two upper and lower magnetic poles 11.12 and a magnetic pole 11.12,
The recording/reproducing gap 13 is formed. Furthermore, the edge 14 of the magnetic pole forming the recording/reproducing gap 13
and 15 and the other edge 16.17 are non-parallel.

第２図は本発明の第１図の薄膜磁気ヘッドにより孤立波
を記録再生した成形である。エツジ１４゜１５と１６．
１７が非平行であるために＠Ｍｌｌ。FIG. 2 shows the formation of a solitary wave recorded and reproduced by the thin film magnetic head of FIG. 1 according to the present invention. Edge 14°15 and 16.
@Mll because 17 is non-parallel.

１２がギャップ１３の長さに比して、無限に大きくなっ
たと同様の効果で、アンダーシュートを生じず、またそ
の記録密度特性は第６図ａの如くフラットなものとなる
。12 becomes infinitely larger than the length of the gap 13. Undershoot does not occur, and the recording density characteristics become flat as shown in FIG. 6a.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明の薄膜磁気ヘッドを用いる
ことにより、孤立波にアンダーシュートを生ぜず、記録
＠度特性に凹凸を生ぜず、ひいては波形不良、分解能劣
化の原因とならず、特別な回路を必要としない効果があ
る。As explained above, by using the thin film magnetic head of the present invention, there will be no undershoot in the solitary wave, no unevenness in the recording characteristics, no cause of waveform defects or resolution deterioration, and no special This has the effect of not requiring a circuit.

【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ｉ腺磁気ヘッドの磁極
及びギャップを媒体走行側から見た断面図、第２図は本
発明の薄膜磁気ヘッドによる孤立波形を示す図、第３図
は、従来の薄膜磁気ヘッドの外観図、第４図は従来の薄
膜磁気ヘッドの磁極及びギャップ部を示す図、第５図は
従来の薄膜磁特性を示す図である。 代理人　弁理士　　内　原　　　晋、−１，し第　１　
図 第２　図 第　３　図 Ｊ 柴４−　■FIG. 1 is a cross-sectional view of the magnetic pole and gap of an i-gland magnetic head according to an embodiment of the present invention, viewed from the medium running side, FIG. 2 is a diagram showing an isolated waveform by the thin-film magnetic head of the present invention, and FIG. , an external view of a conventional thin film magnetic head, FIG. 4 is a diagram showing the magnetic pole and gap portion of the conventional thin film magnetic head, and FIG. 5 is a diagram showing the conventional thin film magnetic characteristics. Agent: Patent Attorney Susumu Uchihara, -1, 1st
Figure 2 Figure 3 Figure J Shiba 4- ■

Claims (1)

【特許請求の範囲】[Claims] 記録、再生ギャップを形成する磁極のエッジと前記磁極
の他の一方のエッジとが非平行であることを特徴とする
薄膜磁気ヘッド。A thin film magnetic head characterized in that an edge of a magnetic pole forming a recording/reproducing gap and the other edge of the magnetic pole are non-parallel.
JP13083886A 1986-06-04 1986-06-04 Thin film magnetic head Pending JPS62287411A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13083886A JPS62287411A (en) 1986-06-04 1986-06-04 Thin film magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13083886A JPS62287411A (en) 1986-06-04 1986-06-04 Thin film magnetic head

Publications (1)

Publication Number Publication Date
JPS62287411A true JPS62287411A (en) 1987-12-14

Family

ID=15043878

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13083886A Pending JPS62287411A (en) 1986-06-04 1986-06-04 Thin film magnetic head

Country Status (1)

Country Link
JP (1) JPS62287411A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356126A2 (en) * 1988-08-17 1990-02-28 Quantum Corporation Recording head to minimize undershoots in readback pulses
JPH03263603A (en) * 1990-03-13 1991-11-25 Alps Electric Co Ltd Thin-film magnetic head and production thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0356126A2 (en) * 1988-08-17 1990-02-28 Quantum Corporation Recording head to minimize undershoots in readback pulses
JPH03263603A (en) * 1990-03-13 1991-11-25 Alps Electric Co Ltd Thin-film magnetic head and production thereof

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