JPH0318242B2 - - Google Patents
Info
- Publication number
- JPH0318242B2 JPH0318242B2 JP56213243A JP21324381A JPH0318242B2 JP H0318242 B2 JPH0318242 B2 JP H0318242B2 JP 56213243 A JP56213243 A JP 56213243A JP 21324381 A JP21324381 A JP 21324381A JP H0318242 B2 JPH0318242 B2 JP H0318242B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic pole
- magnetic
- side magnetic
- coil
- thin film
- 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.)
- Expired - Lifetime
Links
- 239000010409 thin film Substances 0.000 claims description 17
- 230000035699 permeability Effects 0.000 claims description 6
- 239000000758 substrate Substances 0.000 claims description 6
- 229910000859 α-Fe Inorganic materials 0.000 claims description 6
- 239000010408 film Substances 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000005530 etching Methods 0.000 description 2
- 229910000889 permalloy Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
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
Description
【発明の詳細な説明】 本発明はリング形状の磁気ヘツドに関する。[Detailed description of the invention] The present invention relates to a ring-shaped magnetic head.
本発明の目的は記録磁界の垂直成分をより強く
発生させることであり、他の目的は製造工程を容
易にすることである。 The purpose of the present invention is to generate a stronger perpendicular component of the recording magnetic field, and another purpose is to facilitate the manufacturing process.
従来リング形状の磁気ヘツドは第１図に示すよ
うに、バルク磁性体で形成された磁極を張り合せ
て作つている。このような磁気ヘツドに対して、
従来は記録媒体の面内方向に磁化する方法がとら
れている。しかし最近ではこの方法による記録密
度の限界から、記録媒体の垂直方向に磁化するい
わゆる垂直磁気記録なる方法が採用されつつあ
る。このような垂直磁気記録方式に対して、第１
図のような従来の磁気ヘツドでは、記録磁界の水
平成分が強く、さらにギヤツプ近傍以外からの漏
れ磁界が強い。従つて記録密度の低下とともに垂
直方向の磁界がヘツド面およびギヤツプ近傍に限
定され、このようなヘツドでは垂直磁気記録の目
的を十分に達成することはできない。従つて垂直
磁気記録のヘツドとしては第２図に示すような補
助磁極励磁形のヘツドが考案されている。このタ
イプのものは常に記録媒体をはさんで対になつて
移動させる必要があり、記録装置の構造が複雑と
なる。このような欠点から、垂直磁気記録用のヘ
ツドとして種々のものが考案されつつある。第３
図はギヤツプ近傍に従来のヘツドよりも強に磁界
を発生する薄膜タイプのリング状ヘツドである。
この場合には数回の薄膜形成およびエツチングが
必要となり、製造工程の複雑化および製造歩留り
の低下などの欠点がある。 Conventionally, a ring-shaped magnetic head is made by laminating magnetic poles made of bulk magnetic material, as shown in FIG. For such magnetic heads,
Conventionally, a method has been used in which the recording medium is magnetized in the in-plane direction. However, recently, due to the limitations of recording density with this method, a method called perpendicular magnetic recording, in which the recording medium is magnetized in the perpendicular direction, is being adopted. For this perpendicular magnetic recording system, the first
In the conventional magnetic head shown in the figure, the horizontal component of the recording magnetic field is strong, and the leakage magnetic field from areas other than the vicinity of the gap is also strong. Therefore, as the recording density decreases, the perpendicular magnetic field is limited to the head surface and the vicinity of the gap, and such a head cannot satisfactorily achieve the purpose of perpendicular magnetic recording. Therefore, as a head for perpendicular magnetic recording, an auxiliary magnetic pole excitation type head as shown in FIG. 2 has been devised. In this type of device, it is necessary to always move the recording medium in pairs, making the structure of the recording device complicated. Due to these drawbacks, various types of heads for perpendicular magnetic recording are being devised. Third
The figure shows a thin film type ring-shaped head that generates a stronger magnetic field near the gap than conventional heads.
In this case, thin film formation and etching are required several times, resulting in disadvantages such as complication of the manufacturing process and reduction in manufacturing yield.
本発明は以上の例に対して、磁界分布の向上お
よび製造工程の簡略化を目指するものであり、以
下に先行例により詳細に説明する。第４図は本発
明の実施例で、４１はトレーリング側磁極でバル
ク基板４２上に形成されたパーマロイ等軟磁性体
の高透磁率薄膜である。４２はフエライトまたは
非磁性体の再板である。４３はヘツドギヤツプ、
４４は通常の線状コイル、４５はリーデイング側
磁極であり、フエライトなどのバルク基板であ
る。４６は張り合せ部であり、記録媒体は紙面左
方向に移動する。第５図は本発明の先行例であ
り、５１はトレーリング側磁極でバルク基板５２
上に形成されたパーマロイ等軟磁性体の高透磁率
薄膜５５はリーデイング側磁極で５２と同様軟磁
性体の高透磁率薄膜である。５２，５７は非磁性
体あるいはフエライト等軟磁性体である。５４は
通常の線状コイル、５６は張り合せ部である。第
６図は本発明の先例である４図および５図のヘツ
ドによる垂直方向の磁界強度Hyとギヤツプ中心
からのキヨリｘとの関係を表わしたもので、６１
が本発明の先例による磁界分布、６２が従のリン
グ状ヘツドによる磁界分布である。６３，６４，
６５はそれぞれリーデイング側磁極、トレーリン
グ側磁極およびギヤツプを示す。このような本発
明の先例によれば鋭い垂直方向の磁界を得ること
ができる。しかしこれらの先行例ではワイヤーコ
イルを用いているので磁束漏れが多く効率が悪い
といつた問題が残る。本発明はかかる問題点を解
決したものである。 The present invention aims at improving the magnetic field distribution and simplifying the manufacturing process with respect to the above examples, and will be explained in detail below with reference to a prior example. FIG. 4 shows an embodiment of the present invention, in which reference numeral 41 denotes a trailing side magnetic pole, which is a high permeability thin film of a soft magnetic material such as permalloy formed on a bulk substrate 42. In FIG. 42 is a re-plate made of ferrite or non-magnetic material. 43 is the head gap,
44 is a normal linear coil, 45 is a leading side magnetic pole, and is a bulk substrate such as ferrite. Reference numeral 46 denotes a pasting section, in which the recording medium moves to the left on the page. FIG. 5 shows a prior example of the present invention, where 51 is a trailing side magnetic pole and a bulk substrate 52 is shown.
A high magnetic permeability thin film 55 made of a soft magnetic material such as permalloy formed on the top is a leading side magnetic pole, and is a high magnetic permeability thin film of a soft magnetic material like 52. 52 and 57 are non-magnetic materials or soft magnetic materials such as ferrite. 54 is a normal wire coil, and 56 is a bonded portion. FIG. 6 shows the relationship between the vertical magnetic field strength Hy from the head shown in FIGS. 4 and 5, which are examples of the present invention, and the deviation x from the center of the gap.
is the magnetic field distribution according to the precedent of the present invention, and 62 is the magnetic field distribution according to the conventional ring-shaped head. 63, 64,
Reference numerals 65 indicate a leading side magnetic pole, a trailing side magnetic pole, and a gap, respectively. According to the precedent of the present invention, a sharp vertical magnetic field can be obtained. However, since these prior art examples use wire coils, there remains the problem of high magnetic flux leakage and poor efficiency. The present invention solves these problems.
第７図は本発明の実施例であり、７１はトレー
リング側磁極で軟磁性体の高透磁率薄膜、７２は
非磁性体又はフエライト等の基板、７３はヘツド
ギヤツプを形成するための非磁性の薄膜、７５は
リーデイング側磁極、７６は薄膜コイルであり紙
面に垂直方向に磁化するいわゆる垂直電流が流れ
る。７７は両磁極の接合部である。この実施例で
はトレーリング側磁極の方に薄膜コイルを形成し
ているが、リーデイング側磁極の方に形成しても
よい。しかし前者の方がトレーリング側磁極の先
端に鋭い垂直方向の磁界を発生することがきる。 FIG. 7 shows an embodiment of the present invention, in which reference numeral 71 denotes a trailing side magnetic pole, which is a thin film of high magnetic permeability made of soft magnetic material, 72 is a substrate made of non-magnetic material or ferrite, and 73 is a non-magnetic material for forming a head gap. A thin film 75 is a leading side magnetic pole, and 76 is a thin film coil through which a so-called perpendicular current that is magnetized in a direction perpendicular to the plane of the paper flows. 77 is a junction between both magnetic poles. In this embodiment, the thin film coil is formed on the trailing side magnetic pole, but it may be formed on the leading side magnetic pole. However, the former can generate a sharper vertical magnetic field at the tip of the trailing magnetic pole.
以上本発明によればいかの如き効果を有する。 The present invention has the following effects.
ａ トレーリング側磁極をフエライト等のバルク
基板上面に形成される高透磁率薄膜により構成
することにより、従来のリング状ヘツドに比べ
てギヤツプ位置に集中した強い磁力線を発生さ
せることができる。またコイルをトレーリング
側磁極の上面に薄膜により形成することによ
り、コイルに発生した磁界を効率良くトレーリ
ング側磁極に導き漏れ磁界を極力減じることが
できるので、トラーリング側磁極を高透磁率薄
膜により形成した構成と相俟つて一層強い磁力
線を発生させることができるものである。a By constructing the trailing side magnetic pole with a high magnetic permeability thin film formed on the top surface of a bulk substrate such as ferrite, it is possible to generate strong lines of magnetic force concentrated at the gap position compared to conventional ring-shaped heads. In addition, by forming the coil with a thin film on the top surface of the trailing side magnetic pole, the magnetic field generated in the coil can be efficiently guided to the trailing side magnetic pole and the leakage magnetic field can be reduced as much as possible. Together with the structure formed by this, it is possible to generate even stronger lines of magnetic force.
ｂ リーデイング側磁極は、磁気回路がコイルを
貫通するようにトレーリング側磁極に張り合わ
せて構成したので、従来の薄膜ヘツドにあつた
ような何回もの薄膜形成・エツチング工程を軽
減し、より簡単な構成により性能の良い磁気ヘ
ツドを提供できるものである。またトレーリン
グ側磁極上面にコイルを形成する際に両者の間
に介在させる非磁性膜を、トレーリング側磁極
とリーデイング側磁極とのギヤツプ間にも共通
に介在させヘツドギヤツプを決定させているの
で、各々の薄膜を１回の薄膜形成工程で形成す
ることが可能であり、製造・構成を簡略化させ
低コストで高性能の磁気ヘツドを提供できるも
のである。b The leading side magnetic pole is constructed by attaching it to the trailing side magnetic pole so that the magnetic circuit passes through the coil, which reduces the number of thin film forming and etching processes required for conventional thin film heads, and makes it easier. Depending on the configuration, a magnetic head with good performance can be provided. Furthermore, when forming a coil on the top surface of the trailing side magnetic pole, the non-magnetic film interposed between the two is also commonly interposed between the gaps of the trailing side magnetic pole and the leading side magnetic pole to determine the head gap. Each thin film can be formed in a single thin film forming process, simplifying manufacturing and configuration, and providing a high-performance magnetic head at low cost.
第１図は従来の実施例の断面図。第２図は従来
の実施例の断面図。第３図は従来の実施例の断面
図。第４図は本発明の実施例の断面図。第５図は
本発明の実施例の断面図。第６図は磁界分布。第
７図は本発明の実施例の断面図。
１１……トレーリング側磁極、１３……ギヤツ
プ、１４……コイル、１５……リーデイング側磁
極、１６……張り合せ部、３１，３２……磁極、
３３……ギヤツプ、３４……コイル、２１……主
磁極、２２……記録媒体、２３……補助磁極、２
４……コイル。
FIG. 1 is a sectional view of a conventional embodiment. FIG. 2 is a sectional view of a conventional embodiment. FIG. 3 is a sectional view of a conventional embodiment. FIG. 4 is a sectional view of an embodiment of the present invention. FIG. 5 is a sectional view of an embodiment of the present invention. Figure 6 shows the magnetic field distribution. FIG. 7 is a sectional view of an embodiment of the present invention. 11... Trailing side magnetic pole, 13... Gap, 14... Coil, 15... Leading side magnetic pole, 16... Bonding part, 31, 32... Magnetic pole,
33... Gap, 34... Coil, 21... Main magnetic pole, 22... Recording medium, 23... Auxiliary magnetic pole, 2
4...Coil.
Claims (1)
びコイルから成る磁気ヘツドにおいて、フエライ
ト等のバルク基板上面に高透磁率薄膜により前記
トレーリング側磁極を形成するとともに、前記ト
レーリング側磁極の上面に非磁性膜を介して薄膜
によりコイルを形成し、前記コイルを磁気回路が
貫通するように前記トレーリング側磁極とリーデ
イング側磁極を張り合わせ、且つ前記非磁性膜を
前記トレーリング側磁極と前記リーデイング側磁
極のギヤツプ間に介在させヘツドギヤツプを決定
してなることを特徴とする磁気ヘツド。1 In a magnetic head consisting of a trailing side magnetic pole, a leading side magnetic pole, and a coil, the trailing side magnetic pole is formed with a high magnetic permeability thin film on the top surface of a bulk substrate such as ferrite, and a nonmagnetic film is formed on the top surface of the trailing side magnetic pole. A coil is formed with a thin film through the coil, the trailing side magnetic pole and the leading side magnetic pole are pasted together so that the magnetic circuit passes through the coil, and the nonmagnetic film is attached to the gap between the trailing side magnetic pole and the leading side magnetic pole. A magnetic head characterized by having a head gap interposed therebetween.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21324381A JPS58115614A (en) | 1981-12-28 | 1981-12-28 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21324381A JPS58115614A (en) | 1981-12-28 | 1981-12-28 | Magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58115614A JPS58115614A (en) | 1983-07-09 |
| JPH0318242B2 true JPH0318242B2 (en) | 1991-03-12 |
Family
ID=16635882
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21324381A Granted JPS58115614A (en) | 1981-12-28 | 1981-12-28 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58115614A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62501806A (en) * | 1985-01-22 | 1987-07-16 | デイジタル イクイプメント コ−ポレ−シヨン | perpendicular magnetic recording construct |
| JP2555031B2 (en) * | 1986-07-02 | 1996-11-20 | 株式会社日立製作所 | Magnetic head |
| JPS63231713A (en) * | 1987-03-20 | 1988-09-27 | Hitachi Ltd | Magnetic head |
| JPH052711A (en) * | 1991-06-27 | 1993-01-08 | Nec Corp | Erase head |
| FR2688513B1 (en) * | 1992-03-13 | 1996-04-19 | Commissariat Energie Atomique | METHOD FOR PRODUCING A MAGNETIC HEAD OF THE PERPENDICULAR TYPE AND HEAD OBTAINED BY THIS PROCESS. |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54103331A (en) * | 1978-02-01 | 1979-08-14 | Sony Corp | Production of magnetic head |
| JPS55157121A (en) * | 1979-05-19 | 1980-12-06 | Nippon Telegr & Teleph Corp <Ntt> | Magnetic head core |
-
1981
- 1981-12-28 JP JP21324381A patent/JPS58115614A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS54103331A (en) * | 1978-02-01 | 1979-08-14 | Sony Corp | Production of magnetic head |
| JPS55157121A (en) * | 1979-05-19 | 1980-12-06 | Nippon Telegr & Teleph Corp <Ntt> | Magnetic head core |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58115614A (en) | 1983-07-09 |
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