JPS5979412A - Magnetic head - Google Patents

Magnetic head

Info

Publication number
JPS5979412A
JPS5979412A JP18866782A JP18866782A JPS5979412A JP S5979412 A JPS5979412 A JP S5979412A JP 18866782 A JP18866782 A JP 18866782A JP 18866782 A JP18866782 A JP 18866782A JP S5979412 A JPS5979412 A JP S5979412A
Authority
JP
Japan
Prior art keywords
magnetic
head
recording
thin film
magnetic field
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
JP18866782A
Other languages
Japanese (ja)
Other versions
JPH0440772B2 (en
Inventor
Tsuneo Handa
恒雄 半田
Osamu Yokoyama
修 横山
Mitsuhiro Inazumi
満広 稲積
Akihiko Kawachi
河内　明彦
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.)
Seiko Epson Corp
Suwa Seikosha KK
Original Assignee
Seiko Epson Corp
Suwa Seikosha KK
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 Seiko Epson Corp, Suwa Seikosha KK filed Critical Seiko Epson Corp
Priority to JP18866782A priority Critical patent/JPS5979412A/en
Publication of JPS5979412A publication Critical patent/JPS5979412A/en
Publication of JPH0440772B2 publication Critical patent/JPH0440772B2/ja
Granted 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
    • G11B5/1278—Structure or manufacture of heads, e.g. inductive specially adapted for magnetisations perpendicular to the surface of the record carrier

Landscapes

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

Abstract

PURPOSE:To generate an intensive vertical magnetic field with high efficiency and to realize the vertical recording with high quality by providing a magnetic head with such a constitution in which a head functions as a core of the main magnetic pole in a record mode and then functions as a ring type head in a reproduction mode respectively. CONSTITUTION:In a record mode, a current is flowed to a spiral thin film coil 8 to exite thin films 7, 11 and 12 of high permeability in the same direction. Thus a magnetic field is generated at the end part of the film 12. The arrows in the figures show the directions of magnetic fields or magnetization. A recording medium 18 moves right toward the paper surface to the head tip 19, and the recording is carried out in order of (a), (b) and (c). As shown in the figures, the films 7 and 12 put together function as a main magnetic pole to obtain an intensive vertical magnetic field. While the reproduction is carried out by applying the magnetic fluxes picked up through a gap part 13 to multi-layer thin film coils 9 and 10. A closed magnetic path is formed with films 7, 11 and 12 to provide the gap part 13, and the coils 9 and 10 are wound around the closed magnetic path. Thus the function of a ring type head is obtained.

Description

【発明の詳細な説明】 本発明は垂直磁化膜を記録媒体とする垂直磁気記録に用
いる磁気ヘッド−関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic head used for perpendicular magnetic recording using a perpendicularly magnetized film as a recording medium.

本発明の目的は実用性の高い垂直磁気記録用の記録再生
ヘッドを得ることにある。An object of the present invention is to obtain a highly practical recording/reproducing head for perpendicular magnetic recording.

コバルト−クロム合金垂直磁化膜を記録媒体とした垂直
磁気記録方式は高記録密度が達成できる方式であると期
待されておシ、研究開発が活発に進められている。最も
高性能なヘッドとして提１案されているヘッドは第１図
に示す主磁極−補助磁極タイプの垂直ヘッドである。こ
のヘッドは軟磁性薄膜１からなる主磁極と軟磁性体３の
まわシに巻き回されたコイル４からなる補助磁極で構成
されている。主磁極−補助磁極タイプのヘッドを使用す
ると、主磁極の先端に発生する強い垂直磁界によフ良好
な垂直磁気記録が可能であり、再生効率も低くない。し
かし実用的な観点からみると、記録媒体の両側に２つに
分れた構造のヘッドは使えない。その理由として、まず
第１に２ブロツクに分れているためコストの低下が困難
であること、第２ＶＣ２つのヘッドブロックの位置調整
が必要なため組立時の調整工数が煩雑であること、第３
ＩＣリジツトデイスクメモリー装置に使用できず使用範
囲が限定されること等が挙げられる。従って実用的なヘ
ッドは一体構造でなければならないと考えられる。従来
のリングタイプの磁気ヘッドは再生効率は高いが、垂直
磁界が強くないので基本的に垂直磁気記録には適さない
。A perpendicular magnetic recording system using a cobalt-chromium alloy perpendicularly magnetized film as a recording medium is expected to be a system capable of achieving high recording density, and research and development is actively underway. The head that has been proposed as the highest performance head is the main pole-auxiliary pole type vertical head shown in FIG. This head consists of a main pole made of a soft magnetic thin film 1 and an auxiliary pole made of a coil 4 wound around a soft magnetic material 3. When a main pole-auxiliary pole type head is used, good perpendicular magnetic recording is possible due to the strong perpendicular magnetic field generated at the tip of the main pole, and the reproduction efficiency is not low. However, from a practical point of view, it is not possible to use a head with a structure that is divided into two parts on both sides of the recording medium. The reasons for this are: firstly, it is difficult to reduce costs because it is divided into two blocks; secondly, the position adjustment of the two 2nd VC head blocks is required, which requires a complicated adjustment process during assembly;
For example, it cannot be used in IC rigid disk memory devices, and the scope of use is limited. Therefore, it is considered that a practical head must have a one-piece structure. Conventional ring-type magnetic heads have high reproduction efficiency, but the perpendicular magnetic field is not strong, so they are basically not suitable for perpendicular magnetic recording.

本発明はこのような状況を踏まえ、実用的かつ高性能な
垂直磁気記録用ヘッドを提案するものである。第２図に
本発明の磁気ヘッドの構造の一例を示す。本ヘッドは薄
膜プロセス忙より製造され″るヘッドであシ、量産性は
高い。本ヘッドは記録時には主磁性としてコアが働き、
再生時にはリングタイプのヘッドとして機能するように
構成されている。即ち、記録はスパイラル状に形成され
た薄膜コイル８に電流を流し、高透磁率薄Ｍ’ｔ、ｕ、
　１２を同方向に励膜し高透磁率薄膜１２の端部がら発
生する磁界によりなされる。その様子を第３図に示す。In view of this situation, the present invention proposes a practical and high-performance perpendicular magnetic recording head. FIG. 2 shows an example of the structure of the magnetic head of the present invention. This head is manufactured using a thin film process and has high mass productivity. During recording, the core acts as the main magnetic field.
It is configured to function as a ring type head during playback. That is, for recording, a current is passed through a thin film coil 8 formed in a spiral shape, and a high magnetic permeability thin film M't,u,
12 are excited in the same direction and a magnetic field is generated from the end of the high magnetic permeability thin film 12. The situation is shown in Figure 3.

第３図中の矢印は磁界あるいは磁化の方向を示す。ヘッ
ド先端１９に対し、記録媒体１８は紙面に向って右の方
向に移動しておル、Ｃα’　＊　［ｂｌ　ｔ　ｌｃｌの
順に記録がなされていく、第３図から分るように高透磁
率薄膜７，１２合わせたものが主磁極として機能してお
）、垂直磁界は強い。この場合の主磁極は厚みが大であ
るので、コアの磁気飽和が起きにくく、磁束の逃げが小
さい。従って、薄膜コイルであるのでコア先端にコイル
が位置していることもあシ記録効率は高い。高透磁率１
１はコナの磁気飽和をよシ起きにぐくする役割を相って
いる。The arrows in FIG. 3 indicate the direction of the magnetic field or magnetization. With respect to the head tip 19, the recording medium 18 moves to the right toward the plane of the paper, and recording is performed in the order of Cα' * [bl t lcl. As can be seen from FIG. The combined thin films 7 and 12 function as the main magnetic pole), and the perpendicular magnetic field is strong. Since the main magnetic pole in this case is thick, magnetic saturation of the core is less likely to occur, and escape of magnetic flux is small. Therefore, since the coil is a thin film coil, the recording efficiency is high due to the fact that the coil is located at the tip of the core. High permeability 1
1 plays a role in preventing Kona's magnetic saturation.

一方、再生はギャップ部１３により拾い上げた磁束を多
層の薄膜コイル９，１０によシなされる。高透磁率薄膜
７，１１　、１２で閉磁路が形成されておシ、ギャップ
部が１３であシ、閉磁路に巻き回されたコイルが９．Ｉ
ｎとなっているリングタイプのヘッドとして機能する。On the other hand, for reproduction, the magnetic flux picked up by the gap portion 13 is transferred to the multilayer thin film coils 9 and 10. A closed magnetic path is formed by the high magnetic permeability thin films 7, 11, and 12, the gap is 13, and the coil wound in the closed magnetic path is 9. I
It functions as a ring-type head with a shape of n.

コイル９．ｌＯは電流を流さないので発熱の問題がない
ので小さくまとめることができる。従ってターン数を増
すことも容易であシ、さらに磁路長を小さくできるので
再生感度を高くすることは容易である。ギャップ部１３
をうすく形成しギャップ長を小さくすることによシ高密
度記録の再生も十分に行なえる。次に製造方法の概略を
説明する。保護膜６を形成した基板５上に高透磁率薄膜
７を形成後コイル８　、９　、１０を順次形成する。こ
の段階で絶縁Ｊ！　１４　、１５　、１６　、１７を形
成してコイルの電気絶縁を確保する。次にギャップ部１
３を形成する。その後高透磁率薄膜１１　、１２を順次
形成する。最後に保護膜１８を形成して薄膜プロセスは
終了する。基板切断、形状加工、先端研磨を行なってヘ
ッドは完成する。とのヘッドで記録コイル８をスパイラ
ル状にしたのはコイル面積を大きくし発熱によるヘッド
の温度上昇を防ぐためであシ、再生コイルを９　、１０
と多層のスパイラル状に形成したのはコンパクトにまと
め、ターン数を増すためである。Coil 9. Since IO does not conduct current, there is no problem of heat generation, so it can be made small. Therefore, it is easy to increase the number of turns, and since the length of the magnetic path can be reduced, it is easy to increase the reproduction sensitivity. Gap part 13
By forming the gap thinly and reducing the gap length, high-density recording can be reproduced satisfactorily. Next, an outline of the manufacturing method will be explained. After forming the high magnetic permeability thin film 7 on the substrate 5 on which the protective film 6 has been formed, the coils 8 , 9 , and 10 are sequentially formed. Insulation J at this stage! 14, 15, 16, and 17 are formed to ensure electrical insulation of the coil. Next, gap part 1
form 3. Thereafter, high magnetic permeability thin films 11 and 12 are sequentially formed. Finally, a protective film 18 is formed to complete the thin film process. The head is completed by cutting the substrate, processing the shape, and polishing the tip. The reason why the recording coil 8 is spiral shaped in the head with 1 is to increase the coil area and prevent the temperature of the head from rising due to heat generation.
The reason why it was formed into a multilayer spiral shape was to make it compact and increase the number of turns.

以上述べてきたように本発明の磁気ヘッドは記録と再生
の方式を変えるように構成することにより、強い垂直磁
界を効率良く発生することができるので良質な垂直記録
が可能であシ、再生においてもリングタイプのヘッドの
高再生効率を利用しておシ優れた再生が可能である。こ
のヘッドは薄膜プロセスによシ製造されるので量産性も
あシ、狭トラツク化にも容易に対応でき、リジットディ
スク装置用のヘッドとしても十分対応できるので極めて
実用性は高く本発明の意義は大きいものがある。As described above, by configuring the magnetic head of the present invention to change the recording and reproducing methods, it is possible to efficiently generate a strong perpendicular magnetic field, thereby enabling high-quality perpendicular recording. The high playback efficiency of the ring type head allows for excellent playback. Since this head is manufactured using a thin film process, it is easy to mass-produce and can be easily adapted to narrow tracks.It can also be used as a head for rigid disk devices, so it is extremely practical and the significance of the present invention is There is something big.

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

第１図は主磁極−補助磁極タイプのヘッドの概略図であ
シ、第２図は本発明による磁気ヘッドの一例の断面を示
す。第３図は本発明による磁気ヘッドの記録のプロセス
を概略示しである。 １．７，１１，１２ｒ−高透磁率ＮＭ ２．１８０・・Φ・拳記録媒体 ３・・・・・・・・高透磁率材 ４目・・１１コイル ５・・・・・・・・非磁性基板 ６・・・・・・・・保護膜（非電導性）８　、９　、１
０・・Φ・薄膜コイル １３・・・・・・・・ギャップ部（誘電体膜）１４　、
１５　、１６　、１７・・絶縁膜１８・・・・・・・・
保護膜 以　　　上 出願人　株式会社諏訪精工舎FIG. 1 is a schematic diagram of a main pole-auxiliary pole type head, and FIG. 2 shows a cross section of an example of the magnetic head according to the present invention. FIG. 3 schematically shows the recording process of the magnetic head according to the present invention. 1.7, 11, 12r - High magnetic permeability NM 2.180... Φ - Fist recording medium 3... High magnetic permeability material 4th piece... 11 Coil 5... Non-magnetic substrate 6...Protective film (non-conductive) 8, 9, 1
0...Φ Thin film coil 13...Gap part (dielectric film) 14,
15, 16, 17... Insulating film 18...
Protective film and above Applicant: Suwa Seikosha Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] 複数のパターニングされた軟磁性薄膜全体を同方向に磁
化するための薄膜コイルと、前記軟磁性薄膜の一部が閉
磁路を形成しておシ、前記閉磁路のまわシに巻き回され
た薄膜コイルから構成されることを特徴とする磁気ヘッ
ド。a thin film coil for magnetizing all of a plurality of patterned soft magnetic thin films in the same direction; a part of the soft magnetic thin films forming a closed magnetic path; and a thin film wound around the closed magnetic path. A magnetic head characterized by being composed of a coil.
JP18866782A 1982-10-27 1982-10-27 Magnetic head Granted JPS5979412A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18866782A JPS5979412A (en) 1982-10-27 1982-10-27 Magnetic head

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18866782A JPS5979412A (en) 1982-10-27 1982-10-27 Magnetic head

Publications (2)

Publication Number Publication Date
JPS5979412A true JPS5979412A (en) 1984-05-08
JPH0440772B2 JPH0440772B2 (en) 1992-07-06

Family

ID=16227740

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18866782A Granted JPS5979412A (en) 1982-10-27 1982-10-27 Magnetic head

Country Status (1)

Country Link
JP (1) JPS5979412A (en)

Also Published As

Publication number Publication date
JPH0440772B2 (en) 1992-07-06

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