JPH0229915A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPH0229915A JPH0229915A JP17972688A JP17972688A JPH0229915A JP H0229915 A JPH0229915 A JP H0229915A JP 17972688 A JP17972688 A JP 17972688A JP 17972688 A JP17972688 A JP 17972688A JP H0229915 A JPH0229915 A JP H0229915A
- Authority
- JP
- Japan
- Prior art keywords
- slider
- magnetic
- magnetic path
- groove
- signal
- 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 44
- 238000004804 winding Methods 0.000 claims 2
- 239000011521 glass Substances 0.000 claims 1
- 239000000463 material Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 5
- 239000000696 magnetic material Substances 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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
- G11B5/187—Structure or manufacture of the surface of the head in physical contact with, or immediately adjacent to the recording medium; Pole pieces; Gap features
- G11B5/1871—Shaping or contouring of the transducing or guiding surface
Abstract
Description
【発明の詳細な説明】
■産業上の利用分野〕
この発明は磁気ディスク装置および磁気ディスク装置の
サーボ情報を書込むサーボトラック書込装置において使
用する磁気ヘッドに関するものである。DETAILED DESCRIPTION OF THE INVENTION (1) Industrial Application Field The present invention relates to a magnetic head used in a magnetic disk device and a servo track writing device for writing servo information in the magnetic disk device.
第２図は例えば実公昭６１−４１１２９号公報に示され
た従来のモノリシック形の磁気ヘッドを示す斜視図であ
り、図において、（１）はスライダ、（２）はセンター
レール、（３）はコア部、（４）は読み出し／書込み用
のギャップ部であるモノリシック形の磁気ヘッドでは、
４スライダ（１）、センタ・−レール（２）、およびコ
ア部（３）が同一の磁性材料であり、ヘッドからの読み
出し信号はギャップ部（４）により磁気ディスク上のト
ラックから読み出す信号（第３図の磁路（７）に関与）
の他に、スライダ（，１）から拾う信号（第４図の磁路
（８）に関与）を含む。これはＹ・軸方向に見てギャッ
プ部（４）がある側のスライダ（１）の端面のシャープ
なエツジ部に磁界が集中するためである。このスライダ
（１）から侵入する信号を少なくするために、スライダ
（１）のギャップ部（４）側のＲ取り（丸みを付ける加
工）を行い滑らかにして、磁界が集中しないようにする
方法が一般には知られている（ ＩＥＥＥＴｒａｎｓａ
ｃｔｉｏｎｓ ｏｎ Ｍａｇｎｅｔｉｃｓ 、 ｖ
ｏｌ、 ＭＡＧ −２０、Ｎｏ、５ 、 Ｓｅｐｔｅｍ
ｂｅｒｌ ９８４．９１２〜９１４頁参照）。FIG. 2 is a perspective view showing a conventional monolithic magnetic head disclosed in, for example, Japanese Utility Model Publication No. 61-41129. In the figure, (1) is a slider, (2) is a center rail, and (3) is a In a monolithic magnetic head, the core part (4) is the gap part for reading/writing.
4 slider (1), center rail (2), and core part (3) are made of the same magnetic material, and the read signal from the head is read from the track on the magnetic disk by the gap part (4). (Involved in magnetic path (7) in Figure 3)
In addition, it includes a signal picked up from the slider (,1) (related to the magnetic path (8) in FIG. 4). This is because the magnetic field concentrates on the sharp edge of the end face of the slider (1) on the side where the gap portion (4) is located when viewed in the Y-axis direction. In order to reduce the signal that enters from the slider (1), there is a method of rounding (rounding) the gap part (4) side of the slider (1) to make it smooth and prevent the magnetic field from concentrating. Generally known ( IEEE Transa
tions on Magnetics, v.
ol, MAG-20, No. 5, Septem
berl 984, pp. 912-914).
しかし、一般にヘッドの磁性材料としてフェライトが使
われており、硬くてＲ取りなどの加工は困難で、加工コ
ストは増し品質も安定しにくいなどの問題点があった。However, ferrite is generally used as the magnetic material for the head, which is hard and difficult to process such as rounding, which increases processing costs and makes it difficult to stabilize quality.
この発明は上記のような問題点を解消するためになされ
たもので、ヘッドの読み出し信号にスライダ部から侵入
する信号があたえる影響を簡単な加工により除くことを
目的とする。The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to eliminate the influence of the signal entering from the slider section on the read signal of the head by simple processing.
この発明に係る磁気ヘッドは、スライド方向に見てギャ
ップ部（４）の在る側においてスライダ（１）とセンタ
ーレール（２）との間に溝（４）を形成したものである
。The magnetic head according to the present invention has a groove (4) formed between the slider (1) and the center rail (2) on the side where the gap portion (4) is present when viewed in the sliding direction.
〔作用Ｊ
この発明における磁気ヘッドは、第２図に示す従来例の
丸印部分（Ａ）を拡大した第３図、同じく丸印部分（Ｂ
）を拡大した第４図に示すように、ギャップ部（４）と
磁気ディスク（６）とでなす磁路（７）よりもスライダ
（１）のシャープエツジ部とギャップ部（４）間と磁気
ディスク（６）とでなす磁路（８）の磁路長の方が短く
なっている（従来例）のを逆転させ、スライダ（１）の
シャープエツジ部とギャップ部（４）間の磁路長が磁路
（７）の磁路長より長くすることにより、磁気抵抗を増
やす、かくしてスライダ部から侵入する信号のレベルが
減少し、ヘッドの読出し信号にあたえる影響を小さくす
る。[Function J] The magnetic head according to the present invention is shown in FIG. 3, which is an enlarged view of the circled area (A) of the conventional example shown in FIG.
), the magnetic field between the sharp edge part of the slider (1) and the gap part (4) is smaller than the magnetic path (7) formed by the gap part (4) and the magnetic disk (6). By reversing the shorter magnetic path length of the magnetic path (8) formed with the disk (6) (conventional example), the magnetic path length between the sharp edge portion of the slider (1) and the gap portion (4) is changed. By making the length longer than the magnetic path length of the magnetic path (7), the magnetic resistance is increased, thus the level of the signal entering from the slider portion is reduced, and the influence on the read signal of the head is reduced.
第１図は本発明の一実施例を示す斜視図であり（１）〜
（４）は上記従来のモノリシック形の磁気ヘッドと全く
同一のものであり、（５）はＹ軸に沿ってギャップ部（
４）が在る側においてスライダ（１）とセンターレール
（２）との間に形成された溝である。FIG. 1 is a perspective view showing an embodiment of the present invention (1) to
(4) is exactly the same as the conventional monolithic magnetic head mentioned above, and (5) is a gap portion (
4) is a groove formed between the slider (1) and the center rail (2) on the side where the slider (1) is located.
上記のように構成された磁気ヘッドにおいては、スライ
ダ（１）の端面のシャープエツジ部とギャップ間の最短
距離でなる磁路（８）（第４図参照）の磁路長を溝（５
）がその切込み分だけ長くする働きをする。したがって
、溝（５）の深さによって長くなる第４図の磁路（８）
の磁路長を、第３図に示すギャップ部（４）での磁路（
７）の磁路長より十分長くすることにより、スライダ（
１）から侵入する信号成分を減衰することができ、スラ
イダ（１）の端面な丸みのあるように面取り加工したヘ
ッドと同等の性能を有するようになす。In the magnetic head configured as described above, the length of the magnetic path (8) (see Fig. 4), which is the shortest distance between the sharp edge part of the end face of the slider (1) and the gap, is determined by the groove (5).
) works to lengthen the cut by that amount. Therefore, the magnetic path (8) in Fig. 4 becomes longer depending on the depth of the groove (5).
The magnetic path length at the gap part (4) shown in Fig. 3 is calculated as the magnetic path length (
By making the magnetic path length sufficiently longer than 7), the slider (
It is possible to attenuate the signal component entering from the slider (1), and to have the same performance as a head whose end face is chamfered to have a rounded shape.
なお、上記実施例では溝（５）を形成したものとしてい
るが、切り欠きを設けても磁路長を長くでき、同等の効
果を期待できる。In the above embodiment, the groove (5) is formed, but even if a notch is provided, the magnetic path length can be increased and the same effect can be expected.
また、溝あるいは切り欠き等の空間を形成することによ
り浮上特性に影響がでる場合には、この空間にセラミッ
ク材等の非磁性材を充填して浮上特性に影響が出ないよ
うにすることもできる。Additionally, if forming a space such as a groove or notch affects the flying characteristics, it is also possible to fill this space with a non-magnetic material such as a ceramic material to prevent this from affecting the flying characteristics. can.
以上のように、この発明によれば溝という簡単な加工を
追加するだけで、スライダから侵入する信号の影響を少
なくし、信号／ノイズ比の向上が図れ、安価で品質の安
定したものが得られる効果がある。As described above, according to the present invention, by simply adding a groove, the influence of signals entering from the slider can be reduced, the signal/noise ratio can be improved, and a product with stable quality can be obtained at low cost. It has the effect of
第１図はこの発明の一実施例を示す斜視図、第２図は従
来の磁気ヘッドを示す斜視図、第３図は第２図のＡ部を
拡大してギャップ部がなす磁路を示す図、第４図は第２
図のＢ部を拡大してスライダ部とギャップ部の間でなす
磁路を示す図である図において、（１）はスライダ、（
２）はセンターレール、（３）はコア部、（４）はギャ
ップ部、（５）は溝、（６）は磁気ディスク、（７）は
ギャップ部での磁路、（８）はスライダ部とギャップ部
でなす磁路である。
なお、図中、同一符号は同一、または相当部分を示す。
代理人 弁理士 大 岩 増 雄’；＋ ａ
、、Ｅ＊（ｆｆｉり 叡；廠−，１４２月１６ 日FIG. 1 is a perspective view showing an embodiment of the present invention, FIG. 2 is a perspective view showing a conventional magnetic head, and FIG. 3 is an enlarged view of section A in FIG. 2, showing the magnetic path formed by the gap. Figure 4 is the second
In the figure, which is an enlarged view of part B in the figure and showing the magnetic path formed between the slider part and the gap part, (1) shows the slider, (
2) is the center rail, (3) is the core part, (4) is the gap part, (5) is the groove, (6) is the magnetic disk, (7) is the magnetic path in the gap part, (8) is the slider part and the magnetic path formed by the gap. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent: Masuo Oiwa, patent attorney; + a
,,E*(ffiri 叡;廠-,14February 16th
Claims (1)
のための巻線を施すためのコア部と、該スライダ部と該
コア部とをガラス材などを介して密着してなる記録再生
ギャップ部とを有する磁気ヘッドにおいて、該スライダ
部とセンターレール間の該ギャップ部側に溝または切り
欠きを形成したことを特徴とする磁気ヘッド。(1) A recording/reproducing structure consisting of a slider section that generates a floating function, a core section for winding windings for recording/reproducing, and the slider section and the core section being brought into close contact with each other via a glass material or the like. 1. A magnetic head having a gap portion, characterized in that a groove or notch is formed on the side of the gap portion between the slider portion and the center rail.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17972688A JPH0229915A (en) | 1988-07-18 | 1988-07-18 | Magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17972688A JPH0229915A (en) | 1988-07-18 | 1988-07-18 | Magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0229915A true JPH0229915A (en) | 1990-01-31 |
Family
ID=16070797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17972688A Pending JPH0229915A (en) | 1988-07-18 | 1988-07-18 | Magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0229915A (en) |
-
1988
- 1988-07-18 JP JP17972688A patent/JPH0229915A/en active Pending
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