JPS63263609A - Perpendicular magnetic recording head - Google Patents
Perpendicular magnetic recording headInfo
- Publication number
- JPS63263609A JPS63263609A JP9626587A JP9626587A JPS63263609A JP S63263609 A JPS63263609 A JP S63263609A JP 9626587 A JP9626587 A JP 9626587A JP 9626587 A JP9626587 A JP 9626587A JP S63263609 A JPS63263609 A JP S63263609A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- pole
- magnetic pole
- return
- recording
- 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
- 230000005291 magnetic effect Effects 0.000 title claims abstract description 131
- 230000004907 flux Effects 0.000 claims abstract description 26
- 239000000696 magnetic material Substances 0.000 claims abstract description 25
- 230000005284 excitation Effects 0.000 claims abstract description 12
- 238000004804 winding Methods 0.000 claims abstract description 5
- 239000010409 thin film Substances 0.000 claims description 4
- 238000009792 diffusion process Methods 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 abstract description 2
- 230000003247 decreasing effect Effects 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 239000010408 film Substances 0.000 description 6
- 229910000859 α-Fe Inorganic materials 0.000 description 5
- 239000011521 glass Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- AOWKSNWVBZGMTJ-UHFFFAOYSA-N calcium titanate Chemical compound [Ca+2].[O-][Ti]([O-])=O AOWKSNWVBZGMTJ-UHFFFAOYSA-N 0.000 description 1
- NJLLQSBAHIKGKF-UHFFFAOYSA-N dipotassium dioxido(oxo)titanium Chemical compound [K+].[K+].[O-][Ti]([O-])=O NJLLQSBAHIKGKF-UHFFFAOYSA-N 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005294 ferromagnetic effect Effects 0.000 description 1
- 229910001004 magnetic alloy Inorganic materials 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229910000702 sendust Inorganic materials 0.000 description 1
- 238000004544 sputter deposition 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、垂直磁気記録用ヘッドに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a perpendicular magnetic recording head.
磁気記録媒体を厚さ方向に磁化する垂直磁気記録方式は
、高密度記録に適した記録方式として注目されている。A perpendicular magnetic recording method in which a magnetic recording medium is magnetized in the thickness direction is attracting attention as a recording method suitable for high-density recording.
垂直磁気記録を良好に行うには。How to perform perpendicular magnetic recording successfully.
膜面に垂直方向に強い磁気異方性を有する強磁性膜を表
面に持った磁気記録媒体と、該磁気記録媒体に対し強い
垂直成分磁界を発生する磁気記録ヘッドが必要である。A magnetic recording medium having a ferromagnetic film having strong magnetic anisotropy in a direction perpendicular to the film surface on its surface, and a magnetic recording head that generates a strong perpendicular component magnetic field to the magnetic recording medium are required.
従来の垂直磁気記録用ヘッドの一例を第９図。FIG. 9 shows an example of a conventional perpendicular magnetic recording head.
その構造を第１０図に示す。このヘッドは１次のように
して作られる。まず、チタン酸カリウム。Its structure is shown in FIG. This head is made in a first-order manner. First, potassium titanate.
結晶化ガラス、非磁性フェライト等の非磁性材スライダ
２に、軟質磁性材料薄膜よりなる主磁極１をスパンタリ
／グ等の方法で形成する。その後。A main magnetic pole 1 made of a thin film of a soft magnetic material is formed on a slider 2 made of a non-magnetic material such as crystallized glass or non-magnetic ferrite by a method such as spuntary/gating. after that.
主磁極ｌを挾むように非磁性材スライダ２および２′を
接合一体化して、主磁極部を形成する。他方。The non-magnetic material sliders 2 and 2' are integrally joined to sandwich the main magnetic pole l to form a main magnetic pole part. On the other hand.
Ｍｎ−Ｚｎフェライト等の磁性材に第１０図のような形
状の溝加工を施し、その中央の白部分に励磁コイル３を
巻線して、補助磁極部４を形成する。その後、主磁極１
が励磁コイル３の中心になるように前記主磁極部と前記
補助磁極部４を接合一体化する。A magnetic material such as Mn--Zn ferrite is machined with a groove as shown in FIG. 10, and an excitation coil 3 is wound around the white part in the center to form an auxiliary magnetic pole part 4. After that, main pole 1
The main magnetic pole part and the auxiliary magnetic pole part 4 are joined and integrated so that the main magnetic pole part and the auxiliary magnetic pole part 4 are at the center of the excitation coil 3.
このようにして、形成された磁気ヘッドを使用する際に
は、補助磁極部４の中央に巻かれた励磁コイル３に流れ
る信号電流によシ主磁極１を磁化し、その先端部に発生
する垂直磁界によって記録媒体への記録を行う。When using the magnetic head formed in this way, the main magnetic pole 1 is magnetized by a signal current flowing through the excitation coil 3 wound around the center of the auxiliary magnetic pole part 4, and a magnetic field is generated at its tip. Recording is performed on a recording medium using a perpendicular magnetic field.
主磁極先端では、磁束密度が高くなるので、センダスト
、ノクーマロイあるいは非晶質磁性合金のような高飽和
磁束密度で、かつ高透磁率の磁性薄膜あるいは薄板が主
磁極材料として用いられる。Since the magnetic flux density is high at the tip of the main pole, a magnetic thin film or thin plate having a high saturation magnetic flux density and high magnetic permeability, such as Sendust, Noku Malloy, or an amorphous magnetic alloy, is used as the main pole material.
一方、補助磁極４は主磁極１の先端から発生した磁束が
、記録媒体の内部および空中に減衰拡散しないように効
率よく収束し、再び主磁極１に戻すための磁束リターン
用コアとなる。そのため。On the other hand, the auxiliary magnetic pole 4 serves as a magnetic flux return core that efficiently converges the magnetic flux generated from the tip of the main magnetic pole 1 so that it does not attenuate and diffuse inside the recording medium and in the air, and returns it to the main magnetic pole 1 again. Therefore.
補助磁極４が記録媒体に対向する面積を大きくとり、か
つ記録媒体と補助磁極との距離を小さくする必要がある
。It is necessary to increase the area where the auxiliary magnetic pole 4 faces the recording medium and to reduce the distance between the recording medium and the auxiliary magnetic pole.
しかし、従来のヘッドでは、補助磁極と記録媒体間に非
磁性材スライダが介在するため、補助磁極ヘリターンす
る磁束にスペーシングによる損失が生じて、磁束リター
ン効率が低下するという欠点があった。また、前記スペ
ーシング損失を改善するために非磁性材スライダを薄く
すればする程。However, in conventional heads, since a non-magnetic slider is interposed between the auxiliary magnetic pole and the recording medium, a loss occurs in the magnetic flux returning to the auxiliary magnetic pole due to spacing, resulting in a decrease in magnetic flux return efficiency. Moreover, the thinner the non-magnetic material slider is, the more the spacing loss can be improved.
スライダ部摩耗による磁気ヘッドの耐久性、信頼性が低
下するという欠点があった。There was a drawback that the durability and reliability of the magnetic head decreased due to wear of the slider portion.
本発明は前記従来技術の欠点を除き、記録・再生効率の
良い構造を有する垂直磁気記録用ヘッドを提供すること
を目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide a perpendicular magnetic recording head that eliminates the drawbacks of the prior art and has a structure with high recording and reproducing efficiency.
本発明によれば、上面に、励磁コイルを巻線形成するた
めの溝部８を設けた下部磁性体７と、該溝部に巻線形成
された励磁コイル３とを有する下部磁極と、前記下部磁
性体の前記上面に設けられた上部磁極とを備え、該上部
磁極は、軟質磁性材料薄膜よりなるストライプ状主磁極
ｌが前記磁性体の前記上面に垂直に延在するように、一
対の非磁性板５，５／間に挾まれ、かつ、該一対の非磁
性板の各々のもう一方の面には、前記主磁極から垂直磁
気記録媒体２０を経て前記上部磁極にもどるリターン磁
束が通る一対の上部磁性体６，６′が接合された構造を
有し、前記一対の非磁性板及び前記一対の上部磁性体の
下面が前記下部磁性体の上面に接合されていることを特
徴とする垂直磁気記録用ヘッドが得られる。According to the present invention, there is provided a lower magnetic pole having a lower magnetic body 7 provided with a groove 8 on the upper surface for winding an excitation coil, an excitation coil 3 having a wire wound in the groove, and an upper magnetic pole provided on the upper surface of the magnetic body, and the upper magnetic pole includes a pair of non-magnetic magnetic materials such that a striped main magnetic pole l made of a thin film of soft magnetic material extends perpendicularly to the upper surface of the magnetic body. A pair of return magnetic fluxes, which are sandwiched between the plates 5, 5/ and through which return magnetic flux returns from the main magnetic pole via the perpendicular magnetic recording medium 20 to the upper magnetic pole, are provided on the other surface of each of the pair of non-magnetic plates. Perpendicular magnetism having a structure in which upper magnetic bodies 6, 6' are joined, and the lower surfaces of the pair of non-magnetic plates and the pair of upper magnetic bodies are joined to the upper surface of the lower magnetic body. A recording head is obtained.
本発明では、垂直磁気記録媒体２０からの磁束リターン
が、非磁性板５，５′を通らずに、上部磁性体６，６′
を通るので、磁束の拡散・減衰による損失は極めて小さ
い。このように、リターン磁束のスペーシング損失が極
めて小さく、効果的な磁束リターンが行われるために磁
気ヘッドの記録・再生効率が向上する。In the present invention, the magnetic flux return from the perpendicular magnetic recording medium 20 does not pass through the non-magnetic plates 5, 5', but instead passes through the upper magnetic bodies 6, 6'.
The loss due to diffusion and attenuation of the magnetic flux is extremely small. In this way, the spacing loss of the return magnetic flux is extremely small, and effective magnetic flux return is performed, so that the recording/reproducing efficiency of the magnetic head is improved.
以下余日
〔実施例〕
以下２本発明の実施例について説明する。第１図は本発
明による磁気ヘッドを示す図である。EMBODIMENTS OF THE INVENTION Two examples of the present invention will be described below. FIG. 1 is a diagram showing a magnetic head according to the present invention.
は、主磁極１と非磁性材スライダ２，２′が存在し。, there is a main magnetic pole 1 and non-magnetic material sliders 2 and 2'.
主磁極先端から記録媒体２０を経た磁束は、非磁性スラ
イダ２，２′を介して補助磁極４にリターンされる。こ
の時、磁束の拡散・減衰による損失がある。なお、２１
はベースフィルム、２２ｉ１１．Ｎｉ −Ｆｅ層、２３
はＣｏ−Ｃｒ層である。The magnetic flux passing through the recording medium 20 from the tip of the main magnetic pole is returned to the auxiliary magnetic pole 4 via the nonmagnetic sliders 2 and 2'. At this time, there is loss due to diffusion and attenuation of the magnetic flux. In addition, 21
is the base film, 22i11. Ni-Fe layer, 23
is a Co-Cr layer.
これに対して、第１図に示した本発明による磁気ヘッド
では、第１２６図に示したように、上部磁極の磁性材料
部分６，６′が記録媒体２０と接するために磁束リター
ンのスペーシング損失が極めて小さく、高い磁束リター
ン効率によって磁気ヘッドの記録・再生効率を向上させ
ることができる。On the other hand, in the magnetic head according to the present invention shown in FIG. 1, as shown in FIG. The loss is extremely small and the magnetic flux return efficiency is high, making it possible to improve the recording/reproducing efficiency of the magnetic head.
本発明による磁気ヘッドの製造工程の一例を以下に説明
する。第２図はガラス、結晶化ガラス。An example of the manufacturing process of the magnetic head according to the present invention will be described below. Figure 2 shows glass, crystallized glass.
チタン酸カルシウム等の非磁性材料５と、 Ｍｎ −Ｚ
ｎフェライトのような磁性材料６を接合一体化したブロ
ックである。前記ブロックの非磁性材表面を鏡面研摩し
、スパツタリング等の手段でＣｏ−Ｚｒ−Ｎｂ非晶質合
金膜のような軟質磁性材料膜を形成後。Non-magnetic material 5 such as calcium titanate, and Mn-Z
This is a block in which a magnetic material 6 such as n-ferrite is bonded and integrated. After mirror-polishing the non-magnetic material surface of the block and forming a soft magnetic material film such as a Co-Zr-Nb amorphous alloy film by sputtering or the like.
トラック幅に相自する幅寸法に磁性膜をエツチングした
ものが第３図に示されている。この主磁極が形成された
ブロックと、同一形状で主磁極を形成していないブロッ
ク５／、６／を突合せて接合一体化し、上部磁極ブロッ
クとしたのが第４図である。FIG. 3 shows a magnetic film etched to a width corresponding to the track width. FIG. 4 shows a block on which this main pole is formed and blocks 5/, 6/, which have the same shape and do not have a main pole, butted against each other to form an upper magnetic pole block.
第４図の破線で示された方向に従って上部磁極ブロック
を切断すると、第５図の上部磁極が形成される。第６図
はＭｎ −Ｚ ｎフェライト等の磁性材料に励磁コイル
巻線用の溝と、励磁コイル端子導出用溝８を加工した下
部磁極７を示す図である。溝加工には超音波加工機や研
削盤が使用されるが、量産時には当初から第６図のよう
な形状に成形した焼結フェライトを用いることができる
。第７図は。Cutting the top pole block according to the direction indicated by the dashed line in FIG. 4 forms the top pole shown in FIG. 5. FIG. 6 is a diagram showing a lower magnetic pole 7 in which grooves for excitation coil winding and grooves 8 for leading out excitation coil terminals are formed in a magnetic material such as Mn-Zn ferrite. An ultrasonic processing machine or a grinding machine is used for groove processing, but for mass production, sintered ferrite formed into the shape shown in FIG. 6 can be used from the beginning. Figure 7 is.
励磁コイル３を取付けて端子を導出した補助磁極を記録
媒体側から見た図である。この補助磁極に第５図で示し
た上部磁極を第８図のように取付ける。この時主磁極１
が、励磁フィル３を取付けた補助磁極中央の凸部分から
はずれると、主磁極の励磁が効果的に行えなくなるので
注意する。その後、第１図のように上部磁極記録媒体接
触面を曲面研摩すれば、磁気ヘッドを得る。FIG. 3 is a diagram of an auxiliary magnetic pole with an excitation coil 3 attached and a terminal led out, viewed from the recording medium side. The upper magnetic pole shown in FIG. 5 is attached to this auxiliary magnetic pole as shown in FIG. 8. At this time, main magnetic pole 1
However, if the excitation filter 3 is removed from the convex part at the center of the auxiliary pole to which it is attached, the main pole cannot be excited effectively, so be careful. Thereafter, as shown in FIG. 1, the upper magnetic pole contacting surface with the recording medium is polished into a curved surface to obtain a magnetic head.
以上述べたごとく本発明によれば、上部磁性体６．６′
を磁束リターン部分が通るので、リターン磁束のスペー
シング損失が極めて小さくなり、効果的な磁束リターン
が行われ、記録・再生効率が向上するという利点をもっ
た垂直磁気記録用ヘッドの提供が可能となった。As described above, according to the present invention, the upper magnetic body 6.6'
Since the magnetic flux return portion passes through the magnetic flux, spacing loss of the return magnetic flux is extremely small, effective magnetic flux return is performed, and it is possible to provide a perpendicular magnetic recording head that has the advantage of improving recording and reproducing efficiency. became.
第１図は本発明の一実施例による垂直磁気記録用ヘッド
の斜視図、第２図〜第８図は第１図のヘッドの製造工程
を説明するための図、第９図は従来の垂直磁気記録用ヘ
ッドの斜視図、第１０図は第９図のヘッドの分解図、第
１１図は第９図のヘッドによる記録媒体への記録状態を
説明するための図、第１２図は第１図のヘッドによる記
録媒体への記録状態を説明するための図である。
Ｉ・・・主磁極、 ２ 、２’・・・非磁性スライダー
、３・・・励磁コイル、４・・・補助磁極、 ５ 、５
’・・・非磁性材。
６．６′・・・磁性材（磁束リターン部）、７・・・下
部磁極、８・・・巻線端子導出用溝。FIG. 1 is a perspective view of a perpendicular magnetic recording head according to an embodiment of the present invention, FIGS. 2 to 8 are diagrams for explaining the manufacturing process of the head shown in FIG. 1, and FIG. 10 is an exploded view of the head in FIG. 9, FIG. 11 is a diagram for explaining the state of recording on a recording medium by the head in FIG. 9, and FIG. 12 is an exploded view of the head in FIG. FIG. 3 is a diagram for explaining a state of recording on a recording medium by the head shown in the figure. I... Main magnetic pole, 2, 2'... Non-magnetic slider, 3... Exciting coil, 4... Auxiliary magnetic pole, 5, 5
'...Non-magnetic material. 6.6'... Magnetic material (magnetic flux return part), 7... Lower magnetic pole, 8... Winding terminal lead-out groove.
Claims (1)
）を設けた下部磁性体（７）と、該溝部に巻線形成され
た励磁コイル（３）とを有する下部磁極と、前記下部磁
性体の前記上面に設けられた上部磁極とを備え、該上部
磁極は、軟質磁性材料薄膜よりなるストライプ状主磁極
（１）が前記磁性体の前記上面に垂直に延在するように
、一対の非磁性板（５、５′）間に挾まれ、かつ、該一
対の非磁性板の各々のもう一方の面には、前記主磁極か
ら垂直磁気記録媒体を経て前記上部磁極にもどるリター
ン磁束が通る一対の上部磁性体（６、６′）が接合され
た構造を有し、前記一対の非磁性板及び前記一対の上部
磁性体の下面が前記下部磁性体の上面に接合されている
ことを特徴とする垂直磁気記録用ヘッド。1. On the top surface, there is a groove (8) for winding the excitation coil.
), a lower magnetic pole having an excitation coil (3) wound in the groove, and an upper magnetic pole provided on the upper surface of the lower magnetic body, The upper magnetic pole is sandwiched between a pair of non-magnetic plates (5, 5') such that a striped main pole (1) made of a thin film of soft magnetic material extends perpendicularly to the upper surface of the magnetic body, and , a pair of upper magnetic bodies (6, 6') are bonded to the other surface of each of the pair of non-magnetic plates, through which return magnetic flux from the main magnetic pole passes through the perpendicular magnetic recording medium and returns to the upper magnetic pole. 1. A perpendicular magnetic recording head, characterized in that the pair of non-magnetic plates and the lower surfaces of the pair of upper magnetic bodies are joined to the upper surface of the lower magnetic body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9626587A JPS63263609A (en) | 1987-04-21 | 1987-04-21 | Perpendicular magnetic recording head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9626587A JPS63263609A (en) | 1987-04-21 | 1987-04-21 | Perpendicular magnetic recording head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63263609A true JPS63263609A (en) | 1988-10-31 |
Family
ID=14160335
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9626587A Pending JPS63263609A (en) | 1987-04-21 | 1987-04-21 | Perpendicular magnetic recording head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63263609A (en) |
-
1987
- 1987-04-21 JP JP9626587A patent/JPS63263609A/en active Pending
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