JPS649646B2 - - Google Patents
Info
- Publication number
- JPS649646B2 JPS649646B2 JP11745780A JP11745780A JPS649646B2 JP S649646 B2 JPS649646 B2 JP S649646B2 JP 11745780 A JP11745780 A JP 11745780A JP 11745780 A JP11745780 A JP 11745780A JP S649646 B2 JPS649646 B2 JP S649646B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic pole
- bypass
- auxiliary
- pole
- 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
Links
- 238000004804 winding Methods 0.000 claims description 5
- 230000005415 magnetization Effects 0.000 claims description 4
- 230000005284 excitation Effects 0.000 claims description 3
- 230000004907 flux Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 239000010409 thin film Substances 0.000 description 3
- 230000035699 permeability Effects 0.000 description 2
- WAIPAZQMEIHHTJ-UHFFFAOYSA-N [Cr].[Co] Chemical class [Cr].[Co] WAIPAZQMEIHHTJ-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000010408 film Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 239000011295 pitch Substances 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)
Description
【発明の詳細な説明】
本発明は垂直磁気記録用の磁気ヘツドの構成に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the construction of a magnetic head for perpendicular magnetic recording.
従来のリング形磁気ヘツドを用いた磁気記録方
式に代つて、近年注目されている新しい垂直磁気
記録方式は、自己減磁効果による磁化の減少がな
いことを主な理由として、従来より一桁以上高い
記録密度が得られる。 The new perpendicular magnetic recording method, which has been attracting attention in recent years as an alternative to the conventional magnetic recording method using a ring-shaped magnetic head, is an order of magnitude faster than the conventional method, mainly because there is no decrease in magnetization due to the self-demagnetizing effect. High recording density can be obtained.
第１図は従来の垂直磁気記録方式を模式的に示
すものである。 FIG. 1 schematically shows a conventional perpendicular magnetic recording system.
１が主磁極、２が補助磁極、３が記録媒体であ
り、４がベース、５が水平方向に磁化容易軸をも
つた高透磁率薄膜で、通常パーマロイが用いられ
る。６は垂直方向に磁化容易軸をもつ磁気記録用
薄膜であり、スパツタされたコバルト−クロム合
金が用いられる。 1 is a main magnetic pole, 2 is an auxiliary magnetic pole, 3 is a recording medium, 4 is a base, and 5 is a high magnetic permeability thin film with an axis of easy magnetization in the horizontal direction, and permalloy is usually used. 6 is a magnetic recording thin film having an axis of easy magnetization in the perpendicular direction, and is made of a sputtered cobalt-chromium alloy.
このような構成をとるならば、記録磁界は細い
主磁極の先端に集中して印加されるため、きわめ
て高い記録密度を得ることができる。 With this configuration, the recording magnetic field is applied in a concentrated manner to the tip of the thin main pole, so that an extremely high recording density can be obtained.
さて、記録媒体の単位面積あたりの記録容量を
上げるためには、媒体の（ヘツドに対する）進行
方向のみならず、それと直角方向の記録密度も上
げることが重要である。これはトラツク間隔とい
われる寸法であり、出力信号振幅およびSN比の
許すかぎりで短かくする。通常100μm、できれば
30μm程度にはしたい。 Now, in order to increase the recording capacity per unit area of a recording medium, it is important to increase the recording density not only in the direction in which the medium travels (relative to the head), but also in the direction perpendicular to it. This dimension is called the track interval, and is made as short as the output signal amplitude and SN ratio allow. Usually 100μm, preferably
I want it to be around 30μm.
しかしながら、このように狭いピツチでトラツ
クを設けるためには、十分高い精度で磁気ヘツド
を移動させなくてはならない。このような機構を
機械的に達成することは大変であり、機構が複雑
になつたり、位置が経時的に変化することを避け
られない。さらに重要なことは、ヘツド全体を移
動させるため、動く部分の質量が大きくなり、慣
性が増すので、トラツク間の移動時間および目的
のトラツク上で定位置に安定するまでの時間が多
くかかり、情報記憶装置で重要なフアクターであ
るアクセス時間が長くなつてしまう。 However, in order to provide tracks with such narrow pitches, the magnetic head must be moved with sufficient precision. It is difficult to mechanically achieve such a mechanism, and it is inevitable that the mechanism will become complicated and the position will change over time. More importantly, moving the entire head increases the mass and inertia of the moving parts, which increases the travel time between tracks and the time it takes to settle into position on the desired track, which increases the amount of information Access time, which is an important factor in storage devices, becomes longer.
本発明は機械的に動く部分をできるだけ少くし
て上記欠点を解消しようというものである。 The present invention aims to eliminate the above-mentioned drawbacks by minimizing mechanically moving parts.
第２図は本発明に関するヘツドの平面図および
側面図ある。主磁極１、媒体３は従来と同じであ
る。全部で５本ある補助磁極は共通の磁極１２と
一体構造である。励磁巻線１４に電流を流すと磁
束は補助磁極１１（５本ある）の先端を発して媒
体３をとおり、主磁極１へと流れる。このままで
あると媒体３の５カ所に同じ記録がなされるの
で、バイパス磁路１３を設け、磁束が外へ漏れな
いようにしようというのが本発明のねらいであ
る。すなわち第２図に示すように、バイパス磁極
１３が、その両端で補助磁束１１および共通の磁
束１２に接していると、磁束はバイパス磁極をと
おつて閉じてしまい、補助磁極１１の先端から発
する磁束はごくわずかになつてしまう。 FIG. 2 is a plan view and a side view of a head according to the present invention. The main magnetic pole 1 and the medium 3 are the same as the conventional one. A total of five auxiliary magnetic poles have a common magnetic pole 12 and an integral structure. When a current is passed through the excitation winding 14, magnetic flux is generated from the tips of the auxiliary magnetic poles 11 (there are five of them), passes through the medium 3, and flows to the main magnetic pole 1. If this continues, the same recording will be made at five locations on the medium 3, so the aim of the present invention is to provide a bypass magnetic path 13 to prevent the magnetic flux from leaking out. That is, as shown in FIG. 2, when the bypass magnetic pole 13 is in contact with the auxiliary magnetic flux 11 and the common magnetic flux 12 at both ends, the magnetic flux is closed through the bypass magnetic pole, and the magnetic flux emitted from the tip of the auxiliary magnetic pole 11 is becomes very small.
ここで、もし５本あるバイパス磁路のおのおの
が独立に、図に矢印で示した方向に移動可能であ
るとすると、特定の磁路１３のみ補助磁極１１と
分離し残りの４本は接触したままにしておくこと
により、磁路１３の接していない（すなわち磁束
が閉じていない）補助磁極のみから磁束が発散し
磁気記録が可能である。 Here, if each of the five bypass magnetic paths can be moved independently in the direction shown by the arrow in the figure, only the specific magnetic path 13 will be separated from the auxiliary magnetic pole 11, and the remaining four will be in contact. By leaving it as is, the magnetic flux diverges only from the auxiliary magnetic poles that are not in contact with the magnetic path 13 (that is, the magnetic flux is not closed), and magnetic recording is possible.
したがつて、本発明の方法によれば、複雑な巻
線は１カ所のみとし、あとは単純なバイパス磁路
を設けることにより、多数の補助磁極のうちの任
意の１本を働かせることが可能になるので、非常
に好都合である。 Therefore, according to the method of the present invention, by requiring only one complex winding and providing a simple bypass magnetic path, it is possible to operate any one of the many auxiliary magnetic poles. Therefore, it is very convenient.
さて、実際にバイパス磁路１３を矢印の方向に
移動させるには、種々の方向が考えられるが、ま
ず圧電素子を用いる方法について説明する。第３
図はバイパス磁路１３のうち１本だけをとり出し
て側面から見た図である。１６は圧電素子であ
り、バイパス磁路１３にはりつけてある。１７は
電極、１８は電池である。圧電素子に電圧をかけ
ると、素子はちぢもうとし、バイメタルの効果に
より、バイパス磁路１３は矢印の方向に反る。電
圧の向きを反対にすると、これとは逆の方向に反
る。この方法ではごく単純な構造で大きな変位を
得ることができる。 Now, various directions can be considered to actually move the bypass magnetic path 13 in the direction of the arrow, but first, a method using a piezoelectric element will be explained. Third
The figure is a side view of only one of the bypass magnetic paths 13. 16 is a piezoelectric element, which is attached to the bypass magnetic path 13. 17 is an electrode, and 18 is a battery. When a voltage is applied to the piezoelectric element, the element tends to shrink, and due to the effect of the bimetal, the bypass magnetic path 13 is warped in the direction of the arrow. If the direction of the voltage is reversed, it will warp in the opposite direction. With this method, a large displacement can be obtained with a very simple structure.
多少構造が複雑になつてもよければ、プランジ
ヤーを用いて、電磁力でバイパス磁路を引き寄せ
ることも可能である。 If you don't mind making the structure a little more complicated, it is also possible to use a plunger to pull the bypass magnetic path using electromagnetic force.
本実施例で、補助磁極は５本としたが、これを
さらに多数にすることも容易である。さらに第２
図に示したものを１つのユニツトとして、多数の
ユニツトを並置することも可能である。 In this embodiment, the number of auxiliary magnetic poles is five, but it is also easy to increase the number of auxiliary magnetic poles to a larger number. Furthermore, the second
It is also possible to arrange a large number of units in parallel, with the one shown in the figure as one unit.
以上の説明で明らかなように、本発明によれば
ごくわずかの可動部のみで、しかもモーターなど
の部品を使わずに多数のトラツクから任意のもの
を選択することができるので、大きな効果をもた
らす。 As is clear from the above explanation, according to the present invention, any track can be selected from a large number of tracks with only a few moving parts and without using parts such as motors, which brings about great effects. .
第１図は従来の垂直磁気記録方式を示す図であ
る。
１……主磁極、２……補助磁極、３……記録媒
体、４……ベース、５……高透磁率膜、６……磁
気記録用薄膜。
第２ａ，ｂ図は本発明の一実施例である。
１１……補助磁極、１２……共通の磁極、１３
……バイパス磁極、１４……励磁用巻線。
第３図ａ，ｂ図はバイパス磁路の一実施例の詳
細図である。
１６……圧電素子。
FIG. 1 is a diagram showing a conventional perpendicular magnetic recording system. 1...Main magnetic pole, 2...Auxiliary magnetic pole, 3...Recording medium, 4...Base, 5...High magnetic permeability film, 6...Thin film for magnetic recording. Figures 2a and 2b show an embodiment of the invention. 11...Auxiliary magnetic pole, 12...Common magnetic pole, 13
...Bypass magnetic pole, 14...Excitation winding. Figures 3a and 3b are detailed views of one embodiment of the bypass magnetic path. 16...Piezoelectric element.
Claims (1)
録媒体をはさんで対向する複数の補助磁極および
主磁極よりなる磁気ヘツドにおいて、前記複数の
補助磁極は励磁用巻線を有する共通の磁極に接続
されるとともに、前記補助磁極のおのおのと前記
共通の磁極に対して、前記巻線の外に並置された
バイパス磁路をもち、該バイパス磁路は圧電素子
片上に積層固着されるとともに、前記圧電素子を
信号の付与に応じて変形させて前記バイパス磁路
が前記補助磁極あるいは共通の磁極と任意に接触
あるいは分離する構成としたことを特徴とする垂
直磁気記録ヘツド。1. In a magnetic head consisting of a plurality of auxiliary magnetic poles and a main magnetic pole facing each other across a magnetic recording medium having an axis of easy magnetization perpendicular to the medium surface, the plurality of auxiliary magnetic poles are connected to a common magnetic pole having an excitation winding. The auxiliary magnetic poles each have a bypass magnetic path juxtaposed outside the winding with respect to the common magnetic pole, and the bypass magnetic path is laminated and fixed on the piezoelectric element piece, and 1. A perpendicular magnetic recording head, characterized in that the piezoelectric element is deformed in accordance with the application of a signal so that the bypass magnetic path comes into contact with or separates from the auxiliary magnetic pole or the common magnetic pole as desired.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11745780A JPS5744214A (en) | 1980-08-26 | 1980-08-26 | Vertical magnetic recording head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11745780A JPS5744214A (en) | 1980-08-26 | 1980-08-26 | Vertical magnetic recording head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5744214A JPS5744214A (en) | 1982-03-12 |
| JPS649646B2 true JPS649646B2 (en) | 1989-02-20 |
Family
ID=14712135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11745780A Granted JPS5744214A (en) | 1980-08-26 | 1980-08-26 | Vertical magnetic recording head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5744214A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07371U (en) * | 1993-05-28 | 1995-01-06 | 覚全運輸株式会社 | Automatic breastfeeder |
-
1980
- 1980-08-26 JP JP11745780A patent/JPS5744214A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07371U (en) * | 1993-05-28 | 1995-01-06 | 覚全運輸株式会社 | Automatic breastfeeder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5744214A (en) | 1982-03-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4639811A (en) | Combined magnetic write and read head for the vertical magnetization of a corresponding recording medium | |
| US4703382A (en) | Thin-film magnetic head for perpendicular (vertical) recording | |
| JPH0327966B2 (en) | ||
| JP3052625B2 (en) | Magnetoresistive thin film magnetic head | |
| JPS649646B2 (en) | ||
| JPS649644B2 (en) | ||
| JP2727275B2 (en) | Manufacturing method of integrated magnetic head | |
| JP3282943B2 (en) | Memory element | |
| JPS5826312A (en) | Multitrack magnetic recording head for vertical magnetization | |
| JP2614203B2 (en) | Magnetoresistance head | |
| JPS6221177B2 (en) | ||
| JPS6357852B2 (en) | ||
| JPH0114994Y2 (en) | ||
| JPS60256907A (en) | Thin film magnetic head | |
| JPS6050607A (en) | Vertical magnetic recording and reproducing head | |
| JPS649645B2 (en) | ||
| JPS6381616A (en) | Single magnetic pole type magnetic head for perpendicular recording | |
| JPS58164012A (en) | Vertical type magnetic head | |
| JPH0897487A (en) | Magnetoresistance effect device and its reproducing method | |
| JPS5919220A (en) | Perpendicular magnetic recording head | |
| JPH037047A (en) | Magnetic circuit for actuator | |
| JPH02128312A (en) | Composite thin film magnetic head | |
| JPS5885914A (en) | Vertical magnetic recording and reproducing head | |
| JPS59188816A (en) | Magnetic head for perpendicular magnetic recording | |
| JPS59191118A (en) | Single magnetic pole type vertical magnetic head |