JPH034966Y2 - - Google Patents
Info
- Publication number
- JPH034966Y2 JPH034966Y2 JP1984029719U JP2971984U JPH034966Y2 JP H034966 Y2 JPH034966 Y2 JP H034966Y2 JP 1984029719 U JP1984029719 U JP 1984029719U JP 2971984 U JP2971984 U JP 2971984U JP H034966 Y2 JPH034966 Y2 JP H034966Y2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- pole film
- length
- recording medium
- main 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
- 230000005291 magnetic effect Effects 0.000 claims description 46
- 230000005415 magnetization Effects 0.000 claims description 15
- 239000000696 magnetic material Substances 0.000 claims description 11
- 230000004907 flux Effects 0.000 description 5
- 238000004804 winding Methods 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003302 ferromagnetic material Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000702 sendust Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000005389 magnetism Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 235000012239 silicon dioxide Nutrition 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
Landscapes
- Magnetic Heads (AREA)
Description
【考案の詳細な説明】
産業上の利用分野
本考案は垂直磁化型磁気ヘツドに係り、磁気テ
ープ等の磁気記録媒体に垂直方向（磁気記録媒体
の厚さ方向）の磁化を行なつて信号を記録し、こ
れを再生する垂直磁化型磁気ヘツドに用いられ
る。[Detailed description of the invention] Industrial application field The present invention relates to a perpendicular magnetization type magnetic head, which magnetizes a magnetic recording medium such as a magnetic tape in the perpendicular direction (thickness direction of the magnetic recording medium) to generate signals. It is used in perpendicular magnetization type magnetic heads that record and reproduce data.
従来技術
一般に、磁気テープ等の磁気記録媒体に磁気ヘ
ツドにより信号を記録してこれを再生する場合、
その媒体の長手方向に磁化を行なわせて記録しこ
れを再生する方法が汎用されている。然るにこの
方法は、記録密度を高くする目的で記録波長を小
さくし、かつ、ギヤツプ長を小にすると媒体の残
留磁化に働く減磁界が大になり、この減磁作用が
信号記録に悪影響を及ぼす。Prior Art Generally, when a signal is recorded on a magnetic recording medium such as a magnetic tape using a magnetic head and then reproduced,
A commonly used method is to record and reproduce information by magnetizing the medium in the longitudinal direction. However, in this method, when the recording wavelength is made smaller and the gap length is made smaller in order to increase the recording density, the demagnetizing field that acts on the residual magnetization of the medium increases, and this demagnetizing effect has a negative effect on signal recording. .
そこで、上記悪影響を解消するものとして従
来、記録媒体の磁性層にその垂直方向に磁化を行
なう垂直磁化型磁気ヘツドが開発されている。こ
のものは、記録波長を小にし、かつ、ギヤツプ長
を小にしても論理的には媒体の残留磁化が減少し
ないので、良好な高密度記録を行ない得る。 Therefore, in order to eliminate the above-mentioned adverse effects, a perpendicular magnetization type magnetic head has been developed in which the magnetic layer of the recording medium is magnetized in the perpendicular direction. In this case, the residual magnetization of the medium does not theoretically decrease even if the recording wavelength and the gap length are made small, so that good high-density recording can be performed.
第１図は従来の垂直磁化型磁気ヘツドの一例の
平面図を示す。同図において、主磁極膜１は、残
留磁気の大なる磁性材にて構成されており、磁気
記録媒体摺接部である前部１1を非磁性材２ａ，
２ｂにて挟持されており、その後部１2を巻線用
孔３a′，３b′を夫々設けられた酸化物系磁性材
（以下、ヨークという）３ａ，３ｂにて挟持され
ている。主磁極膜１の前部１1及び後部１2は、磁
気記録媒体走行方向（矢印方向）上の長さl1を等
しく形成されている。コイル４は巻線用孔３a′，
３b′を挿通されて主磁極膜１の周囲に巻回されて
いる。 FIG. 1 shows a plan view of an example of a conventional perpendicular magnetization type magnetic head. In the figure, the main magnetic pole film 1 is made of a magnetic material with a large residual magnetism, and the front part 11 , which is the part in sliding contact with the magnetic recording medium, is made of a non-magnetic material 2a.
2b, and its rear part 12 is held between oxide-based magnetic materials (hereinafter referred to as yokes) 3a and 3b provided with winding holes 3a' and 3b', respectively. The front part 1 1 and the rear part 1 2 of the main pole film 1 are formed to have the same length l 1 in the magnetic recording medium traveling direction (arrow direction). The coil 4 has a winding hole 3a',
3b' is passed through and wound around the main pole film 1.
非磁性材２ａ、ヨーク３ａにて複合ヨーク５
ａ、非磁性材２ｂ、ヨーク３ｂにて複合ヨーク５
ｂが夫々構成されている。 Composite yoke 5 with non-magnetic material 2a and yoke 3a
Composite yoke 5 with a, non-magnetic material 2b and yoke 3b
b are respectively configured.
記録時、コイル４に信号電流が流れると、主磁
極膜１に信号電流の大きさに応じた垂直方向磁化
が励起され、磁気記録媒体（図示せず）上に信号
電流の大きさに応じた垂直方向残留磁化が形成さ
れる。一方、再生時、媒体に形成された残留磁化
により主磁極膜１に磁界を生じ、コイル４に電流
が流れて再生信号が取出される。 During recording, when a signal current flows through the coil 4, vertical magnetization is excited in the main pole film 1 according to the magnitude of the signal current, and magnetization according to the magnitude of the signal current is generated on a magnetic recording medium (not shown). A perpendicular residual magnetization is formed. On the other hand, during reproduction, residual magnetization formed in the medium generates a magnetic field in the main pole film 1, current flows through the coil 4, and a reproduced signal is extracted.
考案が解決しようとする問題点
ところで、主磁極膜１は記録密度を高くするた
めにその長さl1を例えば0.5μmと非常に小にされ
ており、又、主磁極膜１は高飽和磁性材であるた
めにその飽和磁束密度は酸化物系強磁性材のヨー
ク３ａ，３ｂのそれに比して高い。上記従来の磁
気ヘツドは、主磁極膜１の前部１1も後部１2も共
に長さl1に構成されているため、記録時に主磁極
膜１が磁気飽和を起こし、大きな電流値をもつ信
号を記録し得ず、十分な記録を行な得ない問題点
があつた。Problems to be solved by the invention By the way, the length l1 of the main pole film 1 is made very small, for example, 0.5 μm, in order to increase the recording density, and the main pole film 1 has a high saturation magnetic property. Since it is made of a material, its saturation magnetic flux density is higher than that of the yokes 3a and 3b made of oxide-based ferromagnetic material. In the conventional magnetic head described above, both the front part 11 and the rear part 12 of the main magnetic pole film 1 are configured to have a length l 1 , so the main magnetic pole film 1 undergoes magnetic saturation during recording, resulting in a large current value. There was a problem that the signal could not be recorded and sufficient recording could not be made.
一方、主磁極膜１の長さl1が非常に小であるた
め、特にコイル４を巻回された部分の磁束効率が
低く、これにより、十分な再生特性を得ることが
できない問題点があつた。 On the other hand, since the length l 1 of the main magnetic pole film 1 is very small, the magnetic flux efficiency is particularly low in the part around which the coil 4 is wound, which causes the problem that sufficient reproduction characteristics cannot be obtained. Ta.
問題点を解決するための手段
本考案は、後部の磁気記録媒体走行方向上の長
さを、前部の磁気記録媒体走行方行上の長さに比
して大に形成して上記問題点を解決したものであ
り、記録時の磁気飽和を少なくし、再生時の磁束
効率を大にし、記録、再生特性の優れた垂直磁化
型磁気ヘツドを提供することを目的とする。以
下、第２図と共にその一実施例について説明す
る。Means for Solving the Problems The present invention solves the above problems by forming the length of the rear part in the running direction of the magnetic recording medium to be larger than the length of the front part in the running direction of the magnetic recording medium. The object of the present invention is to provide a perpendicular magnetization type magnetic head that reduces magnetic saturation during recording, increases magnetic flux efficiency during reproducing, and has excellent recording and reproducing characteristics. One embodiment will be described below with reference to FIG. 2.
実施例
第２図は本考案になる垂直磁化型磁気ヘツドの
一実施例の平面図を示し、同図中、第１図のもの
と同一機能を有する部分には同一番号を付す。６
は例えばセンダスト（商標名）、アモルフアス等
の主磁極膜で、スパツタリング等の方法によつて
形成されている。前部６1の磁気記録媒体走行方
向方向上の長さl1は例えば0.5μm、後部６2の磁気
記録媒体走行方向上の長さl2は前部６1のそれよ
り大である数μmと夫々異なる。後部６2の長さl2
は高周波損失を生じない程度に大とされている。Embodiment FIG. 2 shows a plan view of an embodiment of the perpendicular magnetization type magnetic head according to the present invention, and in the figure, parts having the same functions as those in FIG. 1 are designated by the same numbers. 6
is a main pole film made of, for example, Sendust (trade name) or amorphous, and is formed by a method such as sputtering. The length l 1 of the front part 6 1 in the running direction of the magnetic recording medium is, for example, 0.5 μm, and the length l 2 of the rear part 6 2 in the running direction of the magnetic recording medium is several μm, which is larger than that of the front part 6 1 . are different from each other. Rear 6 2 length l 2
is set to be large enough not to cause high frequency loss.
前部６1は非磁性材２ａ，２ｂにて挟持されて
おり、後部６2はヨーク３ａ及び巻線用孔３c′を
設けられたヨーク３ｃにて挟持されている。コイ
ル４は巻線用孔３a′，３c′を挿通されて主磁極膜
６の後部６2の周囲に巻回されている。 The front portion 6 1 is held between non-magnetic materials 2a and 2b, and the rear portion 6 2 is held between a yoke 3a and a yoke 3c provided with a winding hole 3c'. The coil 4 is inserted through the winding holes 3a' and 3c' and is wound around the rear part 62 of the main pole film 6.
非磁性材２ａ、ヨーク３ａにて複合ヨーク５
ａ、非磁性材２ｂ、ヨーク３ｃにて複合ヨーク５
ｃが夫々構成されている。 Composite yoke 5 with non-magnetic material 2a and yoke 3a
Composite yoke 5 with a, non-magnetic material 2b and yoke 3c
c are respectively configured.
主磁極膜６は、後部６2の長さl2が前部６1の長
さl1に比して大に形成されているので、記録時、
コイル４に信号電流を流した場合に後部６2が磁
気飽和を生じることはなく、第１図示のもの比し
て大きな電流値をもつ信号を記録し得、十分な記
録を行ない得る。 The main pole film 6 is formed so that the length l 2 of the rear part 6 2 is larger than the length l 1 of the front part 6 1 .
When a signal current is passed through the coil 4, magnetic saturation does not occur in the rear part 62 , and a signal having a larger current value than that shown in FIG. 1 can be recorded, and sufficient recording can be performed.
一方、コイル４を巻回されている後部６2の長
さl2が大であるので、後部６2の磁束効率が第１
図示のもの比して高く、これにより、十分な再生
特性を得ることができる。 On the other hand, since the length l 2 of the rear part 6 2 around which the coil 4 is wound is large, the magnetic flux efficiency of the rear part 6 2 is the first.
It is higher than that shown in the figure, and as a result, sufficient reproduction characteristics can be obtained.
変形例
なお、主磁極膜６の後部６2を、センダスト
（商標名）、アモルフアス等の高飽和磁性材と例え
ば二酸化シリコン（SiO2）等の絶縁膜とを交互
に積層して構成してもよい。このように絶縁膜を
設ければ、上記実施例によるものに比して再生時
における渦電流損による高周波損失を少なくし
得、より十分な再生特性を得ることができる。Modified Example Note that the rear part 62 of the main pole film 6 may be constructed by alternately laminating a highly saturated magnetic material such as Sendust (trade name) or amorphous and an insulating film such as silicon dioxide (SiO 2 ). good. By providing the insulating film in this way, it is possible to reduce high frequency loss due to eddy current loss during reproduction compared to the above-mentioned embodiment, and more satisfactory reproduction characteristics can be obtained.
効 果
上述の如く、本考案になる垂直磁化型磁気ヘツ
ドは、主磁極膜後部の磁気記録媒体走行方向上の
長さを、主磁極膜前部の磁気記録媒体走行方向上
の長さに比して大に形成したため、記録時、コイ
ルに信号電流を流した場合に後部が磁気飽和を生
じることはなく、従来のものに比して大きな電流
値をもつ信号を記録し得、十分な記録を行ない
得、再生時、後部の磁束効率が従来のものに比し
て高く、十分な再生特性を得ることができ、従来
のものに比して優れた記録、再生特性を得ること
ができる等の特長を有する。Effects As described above, in the perpendicular magnetization type magnetic head of the present invention, the length of the rear part of the main pole film in the running direction of the magnetic recording medium is compared to the length of the front part of the main pole film in the running direction of the magnetic recording medium. Because the coil is formed with a large diameter, magnetic saturation does not occur in the rear part when a signal current is passed through the coil during recording, and it is possible to record signals with a larger current value than conventional coils, allowing for sufficient recording. During reproduction, the magnetic flux efficiency at the rear is higher than that of the conventional type, and sufficient reproduction characteristics can be obtained, and superior recording and reproduction characteristics can be obtained compared to the conventional type. It has the following features.
第１図は従来の磁気ヘツドの一例の平面図、第
２図は本考案になる磁気ヘツドの一実施例の平面
図である。
２ａ，２ｂ……非磁性材、３ａ，３ｃ……酸化
物系強磁性材（ヨーク）、３a′，３c′……巻線用
孔、４……コイル、６……主磁極膜、６1……前
部、６2……後部。
FIG. 1 is a plan view of an example of a conventional magnetic head, and FIG. 2 is a plan view of an embodiment of the magnetic head according to the present invention. 2a, 2b...Nonmagnetic material, 3a, 3c...Oxide-based ferromagnetic material (yoke), 3a', 3c'...Winding hole, 4...Coil, 6...Main pole film, 6 1 ...Front part, 6 2 ...Rear part.
Claims (1)
持され、コイルを巻回される後部を磁性材で挟持
された主磁極膜を設けられた垂直磁化型磁気ヘツ
ドにおいて、 上記主磁極膜後部の磁気記録媒体走行方向上の
長さを、上記主磁極膜前部の磁気記録媒体走行方
向上の長さに比して大に形成してなる垂直磁化型
磁気ヘツド。[Claims for Utility Model Registration] Perpendicular magnetization type, which is provided with a main pole film in which the front part where the magnetic recording medium is slidably contacted is sandwiched between non-magnetic materials, and the rear part where the coil is wound is sandwiched between magnetic materials. A perpendicular magnetization type magnetic head, wherein the length of the rear part of the main pole film in the running direction of the magnetic recording medium is larger than the length of the front part of the main pole film in the running direction of the magnetic recording medium. magnetic head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2971984U JPS60142810U (en) | 1984-03-01 | 1984-03-01 | Perpendicular magnetization type magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2971984U JPS60142810U (en) | 1984-03-01 | 1984-03-01 | Perpendicular magnetization type magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60142810U JPS60142810U (en) | 1985-09-21 |
| JPH034966Y2 true JPH034966Y2 (en) | 1991-02-08 |
Family
ID=30528781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2971984U Granted JPS60142810U (en) | 1984-03-01 | 1984-03-01 | Perpendicular magnetization type magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60142810U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58153216A (en) * | 1982-03-04 | 1983-09-12 | Sony Corp | Magnetic head |
-
1984
- 1984-03-01 JP JP2971984U patent/JPS60142810U/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58153216A (en) * | 1982-03-04 | 1983-09-12 | Sony Corp | Magnetic head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60142810U (en) | 1985-09-21 |
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