JPS6057520A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPS6057520A JPS6057520A JP16452983A JP16452983A JPS6057520A JP S6057520 A JPS6057520 A JP S6057520A JP 16452983 A JP16452983 A JP 16452983A JP 16452983 A JP16452983 A JP 16452983A JP S6057520 A JPS6057520 A JP S6057520A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- axis
- easy magnetization
- end part
- rear end
- 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
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
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
- G11B5/3109—Details
- G11B5/3113—Details for improving the magnetic domain structure or avoiding the formation or displacement of undesirable magnetic domains
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、磁気ヘッドの一部あるいは全部に用いられる
軟磁性薄膜の形状に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the shape of a soft magnetic thin film used in part or all of a magnetic head.
最近、磁気記録の分野では記録密度の向上を図るために
、薄膜磁気ヘッド、垂直磁気記録用磁気ヘッドなどのよ
うに、磁気ヘッドの磁路の一部あるいは全部が軟磁性薄
膜で構成される磁気ヘッドが現われてぎている。Recently, in the field of magnetic recording, in order to improve the recording density, magnetic heads such as thin-film magnetic heads and magnetic heads for perpendicular magnetic recording, in which part or all of the magnetic path of the magnetic head is made of a soft magnetic thin film, have been developed. The head is starting to appear.
磁性体が磁化される過程には、磁壁の移動と、磁化の回
転があるが、磁壁の移動は低速で、かつバルクハウゼン
雑音が生じ、一方の磁化回転は高速である。この磁化回
転を利用するには、磁化容易軸と呼ばれる磁気異方性の
方向を磁気ヘッドの磁路に直交させれば良い。The process by which a magnetic body is magnetized involves the movement of domain walls and the rotation of magnetization. The movement of domain walls is slow and produces Barkhausen noise, while the rotation of magnetization is fast. To utilize this magnetization rotation, it is sufficient to make the direction of magnetic anisotropy, called the axis of easy magnetization, orthogonal to the magnetic path of the magnetic head.
磁気ゲ４方性を軟磁性簿膜に付与する方法として、形状
異方性の利用がある。パーマロイなどの軟磁性薄膜をエ
ツチング等で細長い形状にすると、第１図のように長手
方向に磁化容易軸１−２が向ぐ。このことを応用したの
が本発明の磁極の形状であり、第２図に概略的な磁極の
形状を示す。One way to impart magnetic tetratropy to a soft magnetic film is to use shape anisotropy. When a soft magnetic thin film such as permalloy is made into a long and narrow shape by etching or the like, the axis of easy magnetization 1-2 is oriented in the longitudinal direction as shown in FIG. This fact is applied to the shape of the magnetic pole of the present invention, and FIG. 2 schematically shows the shape of the magnetic pole.
以下、図を参照しながら実施例を説明する。Examples will be described below with reference to the drawings.
第３図は本発明の実施例の＆１１である薄ｈ゛ｌ磁気ヘ
ッドの概略図である。図を単純化するためにコイル３−
４は１回巻きとしである。６−７を基板トしてパーマロ
イなどの軟磁性薄膜３−１．５−２を後端部３−５で結
合し、ヘッド先端部で非磁性体でギャップ３−３が形成
される。記録電流をがじす、あるいは再生電圧を取出す
働きをするコイル６−４は、絶縁膜を介して軟磁性薄膜
３−１．３−２の間を巻き回されている。本実施例のよ
うに、磁極の後端部において、トラック幅方向の長さＷ
をトラック幅Ｗより長くして磁化容易軸を矢印３−８の
方向に向ける。なお、軟磁性スリ膜３−１．３−２をス
パッタ法などで付着させる際に、３−８の方向に外部磁
界を印加することによって磁気異方性は強化される。磁
化容易軸が３−８の方向を向いていない場合に比べて、
高記録密度までノイズの少ない記録、再生を行うことが
できる。FIG. 3 is a schematic diagram of a thin hol magnetic head according to the embodiment &11 of the present invention. To simplify the diagram, coil 3-
4 is one-time winding. A soft magnetic thin film 3-1, 5-2 such as permalloy is bonded to the substrate 6-7 at the rear end 3-5, and a gap 3-3 is formed with a non-magnetic material at the tip of the head. A coil 6-4, which functions to deflect the recording current or take out the reproduction voltage, is wound between the soft magnetic thin films 3-1, 3-2 with an insulating film interposed therebetween. As in this embodiment, at the rear end of the magnetic pole, the length W in the track width direction
is made longer than the track width W, and the axis of easy magnetization is directed in the direction of arrow 3-8. Incidentally, when the soft magnetic pickpocket film 3-1, 3-2 is deposited by sputtering or the like, the magnetic anisotropy is strengthened by applying an external magnetic field in the direction 3-8. Compared to the case where the axis of easy magnetization does not face the direction of 3-8,
Recording and playback with little noise can be performed up to high recording densities.
次に別の実施例を示す。第４図（ａ）は垂直磁気記録用
の磁気ヘッドである。磁化が膜面に垂直に向く垂直磁化
膜を記録媒体とする垂直磁気記録に適した磁気ヘッドは
いくつか提案されているが、第４図は１枚の軟磁性薄膜
で構成される主磁極４−１の先端部分に導体薄膜で記録
、再生用のコイルを巻き回したものである。下部導体Ｉ
Ｕ膜４−２、および上部導体薄膜４−３は絶縁膜を介し
て主磁極４−１をはさみこみ、結合部４−４で、上・下
１５ｊ５導体薄膜４−３，４−２を結合してコイルを形
成する。第４図（ｂ）は第４図（α）のＡ −Ａ′の断
面図である。この場合も磁化容易軸がトラックＩｉＪ方
向４−５を向くように、主磁極４−１の後端部のトラッ
ク幅方向の長さを長くしである。この場合も、磁化容易
軸がトラック幅方向に直交する場合に比べて再生出力も
増加し、高い記録密度までＳＮ比に勝る。Next, another example will be shown. FIG. 4(a) shows a magnetic head for perpendicular magnetic recording. Several magnetic heads have been proposed that are suitable for perpendicular magnetic recording in which the recording medium is a perpendicularly magnetized film in which the magnetization is perpendicular to the film surface. -1 has a recording and reproducing coil wound around its tip using a conductive thin film. Lower conductor I
The U film 4-2 and the upper conductive thin film 4-3 sandwich the main magnetic pole 4-1 via an insulating film, and the upper and lower 15j5 conductive thin films 4-3 and 4-2 are connected at the coupling part 4-4. to form a coil. FIG. 4(b) is a sectional view taken along line A-A' in FIG. 4(α). In this case as well, the length of the rear end portion of the main magnetic pole 4-1 in the track width direction is made long so that the axis of easy magnetization faces in the track IiJ direction 4-5. In this case as well, the reproduction output increases compared to the case where the axis of easy magnetization is perpendicular to the track width direction, and the S/N ratio is superior up to high recording densities.
以上述べてきたように、磁極後端部のトラック幅方向の
長さを長くして磁化容易軸をトラック幅方向に向けるこ
とによって、高い記録密度までＳＮ比の良い信号を得る
ことができる。As described above, by increasing the length of the rear end of the magnetic pole in the track width direction and directing the axis of easy magnetization in the track width direction, it is possible to obtain a signal with a good S/N ratio up to a high recording density.
第１図は軟磁性薄膜の形状による磁気異方性を示す図で
ある。第２図は本発明で用いる磁極形状と磁化容易軸の
方向を示している。第３図は本発明の第１の実施例であ
り薄膜磁気ヘッドの概略図である。第４図（ａ、）は本
発明の第２の実施例であり、垂直磁気記録用の磁気ヘッ
ドの概略図である。第４図（ｂ）は第４［Ｚ（α）のＡ
−Ａ’の断面図である。
１−１・・・・・・軟磁性薄膜
１−２・・・・・・磁化容易軸
２−１・・・・・・磁 極
２−２・・・・・・磁化容易軸
２−３・・・・・・磁気ヘッド先端
Ｗ ・・・・・・トラック幅
３−１・・・・・・軟磁性スリ膜
３−２・・・・・・軟磁性薄膜
３−３・・・・・・ギャップ
３−４・・・・・・コイル
６−５・・・・・・後端部
３−６・・・・・・磁化容易軸
３−７・・・・・・基 板
４−１・・・・・・主磁ちｊ
４−２・・・・・・下部導体薄膜
４−３・・・・・・上部導体薄膜
４−４・・・・・・導体薄膜結合部
４−５・・・・・・磁化容易軸
第２図FIG. 1 is a diagram showing magnetic anisotropy depending on the shape of a soft magnetic thin film. FIG. 2 shows the magnetic pole shape and the direction of the axis of easy magnetization used in the present invention. FIG. 3 is a first embodiment of the present invention, which is a schematic diagram of a thin film magnetic head. FIG. 4(a) shows a second embodiment of the present invention, and is a schematic diagram of a magnetic head for perpendicular magnetic recording. Figure 4(b) shows the 4th [A of Z(α)
-A' is a sectional view. 1-1... Soft magnetic thin film 1-2... Easy magnetization axis 2-1... Magnetic pole 2-2... Easy magnetization axis 2-3 ...Magnetic head tip W ...Track width 3-1 ...Soft magnetic strip film 3-2 ...Soft magnetic thin film 3-3 ... ... Gap 3-4 ... Coil 6-5 ... Rear end 3-6 ... Easy magnetization axis 3-7 ... Substrate 4- 1... Main magnet j 4-2... Lower conductor thin film 4-3... Upper conductor thin film 4-4... Conductor thin film coupling portion 4- 5...Easy axis of magnetization Figure 2
Claims (1)
性薄膜で構成される磁気ヘッドにおしＡて、前記軟磁性
薄膜の形状が、磁気ヘッド先端から離れた部分において
、磁気ヘッドのトラック幅方向に平行な長さがトラック
幅より長くなってし）ることを特徴とする磁気ヘッド。In a magnetic head A in which part or all of the magnetic material constituting the magnetic head is made of a soft magnetic thin film, the shape of the soft magnetic thin film is such that the track width of the magnetic head increases in a portion away from the tip of the magnetic head. A magnetic head characterized in that the length parallel to the direction is longer than the track width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16452983A JPS6057520A (en) | 1983-09-07 | 1983-09-07 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16452983A JPS6057520A (en) | 1983-09-07 | 1983-09-07 | Magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6057520A true JPS6057520A (en) | 1985-04-03 |
Family
ID=15794895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16452983A Pending JPS6057520A (en) | 1983-09-07 | 1983-09-07 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6057520A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02267257A (en) * | 1989-04-06 | 1990-11-01 | Tokyo Seiko Co Ltd | Method for diffusing multi-element alloy plating of steel wires |
| EP0431633A2 (en) * | 1989-12-06 | 1991-06-12 | Sony Corporation | Magnetic transducer head for narrow track width recording |
| JPH03266209A (en) * | 1990-03-14 | 1991-11-27 | Fujitsu Ltd | Thin-film magnetic head |
-
1983
- 1983-09-07 JP JP16452983A patent/JPS6057520A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02267257A (en) * | 1989-04-06 | 1990-11-01 | Tokyo Seiko Co Ltd | Method for diffusing multi-element alloy plating of steel wires |
| EP0431633A2 (en) * | 1989-12-06 | 1991-06-12 | Sony Corporation | Magnetic transducer head for narrow track width recording |
| JPH03266209A (en) * | 1990-03-14 | 1991-11-27 | Fujitsu Ltd | Thin-film magnetic head |
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