JPS63144403A - Perpendicular magnetic head - Google Patents
Perpendicular magnetic headInfo
- Publication number
- JPS63144403A JPS63144403A JP29195286A JP29195286A JPS63144403A JP S63144403 A JPS63144403 A JP S63144403A JP 29195286 A JP29195286 A JP 29195286A JP 29195286 A JP29195286 A JP 29195286A JP S63144403 A JPS63144403 A JP S63144403A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- main
- magnetic pole
- films
- permeability
- 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
Links
- 230000035699 permeability Effects 0.000 claims abstract description 17
- 230000004907 flux Effects 0.000 claims abstract description 15
- 229910000859 α-Fe Inorganic materials 0.000 abstract description 7
- 239000000696 magnetic material Substances 0.000 abstract description 6
- 239000010408 film Substances 0.000 description 26
- 230000000694 effects Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
- 238000004804 winding 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、垂直磁気ヘッド、更に詳しくは、少なくとも
２つの主磁極を有するマルチタイプの垂直磁気ヘッドに
関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a perpendicular magnetic head, and more particularly to a multi-type perpendicular magnetic head having at least two main poles.
［従来の技術］
従来の垂直磁気ヘッドで、薄膜形成によらない、いわゆ
るバルクタイプのものは、一般に、非磁性ブロックとフ
ェライト等からなる高透磁率磁性ブロックとの間に主磁
極膜を挟み、同主磁極膜を挟んだ両ブロックの先端部分
にコイルを巻回して構成される。[Prior Art] Conventional perpendicular magnetic heads that do not rely on thin film formation, so-called bulk type, generally have a main pole film sandwiched between a non-magnetic block and a high permeability magnetic block made of ferrite or the like. It is constructed by winding a coil around the tips of both blocks that sandwich the same main pole film.
［発明が解決しようとする問題点］
ところで、このような垂直磁気ヘッドを用いる磁気記録
再生装置には、記録再生用の磁気ヘッドの他に、例えば
、トラッキング用の磁気ヘッド等を必要としている。し
かし、これらの曳数の垂直磁気ヘッドを狭い空間内に近
接して、あるいは、一体向に設けようとすると、これら
の磁気ヘッド間に生ずるクロストークが大きな問題とな
る。[Problems to be Solved by the Invention] Incidentally, a magnetic recording/reproducing device using such a perpendicular magnetic head requires, for example, a magnetic head for tracking in addition to a magnetic head for recording/reproducing. However, when perpendicular magnetic heads of these perpendicular numbers are arranged close to each other in a narrow space or in one direction, crosstalk occurring between these magnetic heads becomes a serious problem.
本発明は、このような点に鑑みてなされたもので、少な
くとも２つの磁気ヘッドを、両ヘッド間のクロストーク
が極めて少なくなるように一体的に設けてなる垂直磁気
ヘッドを提供することを目的とする。The present invention has been made in view of these points, and an object of the present invention is to provide a perpendicular magnetic head in which at least two magnetic heads are integrally provided so that crosstalk between the two heads is extremely reduced. shall be.
［問題点を解決するための手段および作用］本発明の垂
直磁気ヘッドは、高透磁率磁性ブロックからなるコアの
一方の面に透磁率および飽和磁束密度の比較的高い主磁
極膜を設け、他方の面に透磁率が高くかつ飽和磁束密度
の比較的低い主磁極膜を設けてなるもので、一方の主磁
極膜により発生する磁界は、主磁極膜の飽和磁束密度の
違いから、他方の主磁極膜で拾いにくいものとなり、両
生磁極膜間に生ずるクロストークは極めて少ないものと
なる。[Means and effects for solving the problems] The perpendicular magnetic head of the present invention has a main pole film having relatively high magnetic permeability and saturation magnetic flux density on one side of a core made of a high magnetic permeability magnetic block, and a main pole film having relatively high magnetic permeability and saturation magnetic flux density. A main magnetic pole film with high magnetic permeability and relatively low saturation magnetic flux density is provided on the surface of the main magnetic pole. This makes it difficult for the magnetic pole films to pick up the crosstalk, and the crosstalk that occurs between the two magnetic pole films becomes extremely small.
［実 施 例］
本発明の一実施例の垂直磁気ヘッドは、第１図および第
２図に示すように構成される。[Embodiment] A perpendicular magnetic head according to an embodiment of the present invention is constructed as shown in FIGS. 1 and 2.
フェライトコア１の一方の面と非磁性ブロック２との間
には、初透磁率および飽和磁束密度の高い磁性材からな
る主磁極膜３が挟持され、このフェライトコア１の他方
の面と非磁性ブロック４との間には、初透磁率が高くか
つ飽和磁束密度の低い磁性材からなる２つの主磁極膜５
Ａ、５Ｂが挟持されている。そして、上記主磁極膜３を
挟持したフェライトコア１と非磁性ブロック２の下端面
の中央部分が下方に突出し、この細径の突出部分にコイ
ル６が巻回されて同部分に記録再生用の磁気ヘッド部８
が構成されている。また、上記２つの主磁極膜５Ａ、５
Ｂを挟持したフェライトコア１と非磁性ブロック４の下
端面は主磁極膜５Ａ。A main pole film 3 made of a magnetic material with high initial magnetic permeability and high saturation magnetic flux density is sandwiched between one surface of the ferrite core 1 and the non-magnetic block 2. Between the block 4 and the block 4, there are two main pole films 5 made of a magnetic material with high initial magnetic permeability and low saturation magnetic flux density.
A and 5B are sandwiched. The central part of the lower end surfaces of the ferrite core 1 and the non-magnetic block 2 sandwiching the main magnetic pole film 3 protrudes downward, and a coil 6 is wound around this small diameter protruding part. Magnetic head section 8
is configured. In addition, the two main pole films 5A, 5
The lower end surface of the ferrite core 1 and the non-magnetic block 4 sandwiching B is the main magnetic pole film 5A.
５Ｂをそれぞれ挟持した２箇所の部分て下方に突出し、
このそれぞれの細径の突出部分にコイル？Ａ、７Ｂがそ
れぞれ巻回されてこれらの部分にトラッキング用の磁気
ヘッド部９Ａ、９Ｂが構成されている。なお、フェライ
トコア１の、上記各磁気ヘッド部における突出した下端
面には、磁気記録媒体（図示せず）に対して各主磁極膜
の磁束を集束させるために非磁性部材１０が接合される
。The two parts that sandwich 5B respectively protrude downward,
A coil in each of these small diameter protruding parts? A and 7B are wound respectively, and tracking magnetic head parts 9A and 9B are formed in these parts. A non-magnetic member 10 is bonded to the protruding lower end surface of each magnetic head portion of the ferrite core 1 in order to focus the magnetic flux of each main pole film on a magnetic recording medium (not shown). .
このように構成されている垂直磁気ヘッドにおいて、上
記磁気ヘッド部８は記録再生用として作動し、その主磁
極膜３は、第２図に矢印ａで示す方向に移動する磁気記
録媒体のトラック１１上をトレースする。このとき、上
記磁気ヘッド部９Ａ。In the perpendicular magnetic head constructed in this way, the magnetic head section 8 operates for recording and reproduction, and its main magnetic pole film 3 is attached to the track 11 of the magnetic recording medium moving in the direction shown by arrow a in FIG. Trace above. At this time, the magnetic head section 9A.
９Ｂの主磁極膜５Ａ、５Ｂはトラック１１の両側のガー
トバンド１２Ａ、１２Ｂをトレースする。The main magnetic pole films 5A and 5B of 9B trace the guard bands 12A and 12B on both sides of the track 11.
トラッキングがずれた場合には、主磁極膜５Ａ。If tracking is deviated, the main magnetic pole film 5A.
５Ｂのいずれかがトラック１１から信号を拾い、同信号
によってトラッキングのずれを補正する。5B picks up a signal from the track 11, and uses the signal to correct tracking deviation.
ところで、このように上記磁気ヘッド部８および９Ａ、
９Ｂが作動するとき、主磁極膜３および５Ａ、５Ｂには
それぞれ磁界が発生するが、前述したように、上記記録
再生用の主磁極膜３は、初透磁率および飽和磁束密度の
高い磁性材により形成され、上記トラッキング用の主磁
極膜５Ａ。By the way, as described above, the magnetic head sections 8 and 9A,
When 9B operates, a magnetic field is generated in each of the main magnetic pole films 3, 5A, and 5B, and as mentioned above, the main magnetic pole film 3 for recording and reproduction is made of a magnetic material with high initial magnetic permeability and high saturation magnetic flux density. The main magnetic pole film 5A for tracking is formed by:
５Ｂは、初透磁率が高くかつ飽和磁束密度の低い磁性材
により形成されているので、主磁極膜３に発生する磁界
は主磁極膜５Ａ、５Ｂには拾われ難く、また、主磁極膜
５Ａ、５Ｂで発生する磁界は主磁極Ｈ３に影響を及ぼし
難いものとなっている。5B is formed of a magnetic material with high initial magnetic permeability and low saturation magnetic flux density, so the magnetic field generated in the main magnetic pole film 3 is difficult to be picked up by the main magnetic pole films 5A and 5B. , 5B has little effect on the main magnetic pole H3.
したがって、磁気ヘッド部８および磁気ヘッド部９Ａ、
９Ｂ間にクロストークが発生したとしても、このクロス
トークの量は極めて少ないもので、実際上は全く問題に
ならない程度のものである。Therefore, the magnetic head section 8 and the magnetic head section 9A,
Even if crosstalk occurs between 9Bs, the amount of crosstalk is extremely small and does not pose any problem in practice.
［発明の効果］
以上述べたように本発明によれば、２つ以上の主磁極膜
を有するマルチタイプの垂直磁気ヘッドでありながら、
主磁極膜の飽和磁束密度を異ならせていることにより、
一方の主磁極膜に発生する磁界が他方の主磁極膜に対し
て影響を及ぼすことが少なく、両生磁極膜間のクロスト
ークを極めて減少させたものとすることができる。[Effects of the Invention] As described above, according to the present invention, although it is a multi-type perpendicular magnetic head having two or more main pole films,
By varying the saturation magnetic flux density of the main magnetic pole film,
The magnetic field generated in one main magnetic pole film has little effect on the other main magnetic pole film, and crosstalk between both magnetic pole films can be extremely reduced.
第１図は、本発明の一実施例を示す垂直磁気ヘッドの要
部断面図、
第２図は、上記第１図に示す垂直磁気ヘッドの底面図で
ある。FIG. 1 is a sectional view of essential parts of a perpendicular magnetic head showing an embodiment of the present invention, and FIG. 2 is a bottom view of the perpendicular magnetic head shown in FIG. 1.
Claims (1)
および飽和磁束密度の比較的高い主磁極膜を有し、他方
の面に透磁率が高くかつ飽和磁束密度の比較的低い主磁
極膜を有してなることを特徴とする垂直磁気ヘッド。A core made of a high magnetic permeability magnetic block has a main pole film with relatively high magnetic permeability and saturation magnetic flux density on one side, and a main pole film with high magnetic permeability and relatively low saturation magnetic flux density on the other side. A perpendicular magnetic head comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29195286A JPS63144403A (en) | 1986-12-08 | 1986-12-08 | Perpendicular magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP29195286A JPS63144403A (en) | 1986-12-08 | 1986-12-08 | Perpendicular magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63144403A true JPS63144403A (en) | 1988-06-16 |
Family
ID=17775585
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP29195286A Pending JPS63144403A (en) | 1986-12-08 | 1986-12-08 | Perpendicular magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63144403A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360978A2 (en) * | 1988-09-27 | 1990-04-04 | Fujitsu Limited | A thin film magnetic head for perpendicular recording and reproducing |
| US6813115B2 (en) * | 2002-04-18 | 2004-11-02 | Seagate Technology Llc | Perpendicular magnetic recording head with improved write field gradient |
| US6822829B2 (en) * | 2001-10-19 | 2004-11-23 | Seagate Technology Llc | Perpendicular magnetic recording head with a multilayered main write pole |
-
1986
- 1986-12-08 JP JP29195286A patent/JPS63144403A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0360978A2 (en) * | 1988-09-27 | 1990-04-04 | Fujitsu Limited | A thin film magnetic head for perpendicular recording and reproducing |
| US6822829B2 (en) * | 2001-10-19 | 2004-11-23 | Seagate Technology Llc | Perpendicular magnetic recording head with a multilayered main write pole |
| US6813115B2 (en) * | 2002-04-18 | 2004-11-02 | Seagate Technology Llc | Perpendicular magnetic recording head with improved write field gradient |
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