JPH043308A - Floating magnetic head - Google Patents
Floating magnetic headInfo
- Publication number
- JPH043308A JPH043308A JP10409190A JP10409190A JPH043308A JP H043308 A JPH043308 A JP H043308A JP 10409190 A JP10409190 A JP 10409190A JP 10409190 A JP10409190 A JP 10409190A JP H043308 A JPH043308 A JP H043308A
- Authority
- JP
- Japan
- Prior art keywords
- slider
- magnetic
- core
- length
- side face
- 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
- 238000007667 floating Methods 0.000 title claims description 14
- 229910000859 α-Fe Inorganic materials 0.000 claims abstract description 11
- 239000000919 ceramic Substances 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 3
- 239000000696 magnetic material Substances 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000010409 thin film Substances 0.000 claims description 2
- 230000001172 regenerating effect Effects 0.000 abstract 2
- 230000000052 comparative effect Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Adjustment Of The Magnetic Head Position Track Following On Tapes (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は磁気ディスク装置に使用される浮上型磁気ヘッ
ドに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a flying magnetic head used in a magnetic disk device.
浮上型磁気ヘッドとしては第４図に示すモノリシック型
と第５図に示すコンボジフト型が一般に用いられている
。モノリシック型磁気ヘッドはスライダ一部自体が主磁
路の一部を構成するためインダクタンスが高く、再生に
おいて高出力を得られる。As floating magnetic heads, the monolithic type shown in FIG. 4 and the combo dift type shown in FIG. 5 are generally used. In a monolithic magnetic head, a portion of the slider itself constitutes a portion of the main magnetic path, so the inductance is high and high output can be obtained during reproduction.
一部コンボジット型磁気ヘッドは、先端にトラック部分
を研削加工した磁気コア９をスライダーのスリット８へ
挿入し、ガラスで固定されている構造を持つため、狭ト
ラツク化に有利である。Some composite magnetic heads have a structure in which a magnetic core 9 with a track portion ground at its tip is inserted into a slit 8 of a slider and fixed with glass, which is advantageous for narrowing the track.
また、特開平１−２６０６０６ではスライダー側面にま
で及ぶ切り欠けを設は磁気コアをスライダーの側面より
接合するコンポジット型磁気ヘッドを示している。Furthermore, Japanese Patent Laid-Open No. 1-260606 discloses a composite magnetic head in which a notch extending to the side surface of the slider is provided and a magnetic core is joined from the side surface of the slider.
特開昭６３−１１３９２１は磁気コアの両側面に一対の
スライダーを接合した浮上型磁気ヘッドを示している。JP-A-63-113921 discloses a floating magnetic head in which a pair of sliders are bonded to both sides of a magnetic core.
モノリシック型磁気ヘッドはトランク部３を斜め加工に
より形成しており、トラック部のみスライダーから吐出
しているため狭トラツクにするとカケを発生しやすいと
いう問題があり、狭トラツク化に適していない。In the monolithic type magnetic head, the trunk portion 3 is formed by diagonal machining, and since only the track portion is ejected from the slider, there is a problem that chipping is likely to occur when the track is made narrow, and therefore it is not suitable for making the track narrow.
コンポジット型磁気ヘッドは狭トラツク化しやすいが、
磁気コアが形成する主磁路の断面積が狭く、インダクタ
ンスが低いため、再生において出力が低くなり、近年の
小型高密度化に対応しきれない事が問題となってきてい
る。Composite magnetic heads tend to have narrower tracks, but
Since the cross-sectional area of the main magnetic path formed by the magnetic core is narrow and the inductance is low, the output during reproduction is low, and it has become a problem that it cannot cope with the recent trend toward smaller size and higher density.
また、特開平１−２６０６０６における浮上型磁気ヘッ
ドはやはり磁気コアの断面積が狭いため、高い再生出力
を望めない。Furthermore, the floating magnetic head disclosed in Japanese Patent Application Laid-Open No. 1-260606 cannot achieve high reproduction output because the cross-sectional area of the magnetic core is narrow.
特開昭６３−１１３９２１における浮上型磁気ヘッドは
、磁気ギャップ部がスライダーの中心近傍に位置するた
め、小型ディスクにて大記録容量化を行う場合、ディス
クの外周部を使用できなくなる問題がある。In the floating magnetic head disclosed in Japanese Patent Application Laid-Open No. 63-113921, the magnetic gap portion is located near the center of the slider, so when increasing the recording capacity of a small disk, there is a problem that the outer peripheral portion of the disk cannot be used.
本発明による浮上型磁気ヘッドは、非磁性セラミックか
らなるスライダーの側面にＭ ｎ −Ｚ ｎフェライト
よりなる磁気コアを接着した浮上型磁気ヘッドにおいて
、磁気ギャップ部をスライダーの側面部に形成し、磁気
コアの長さがスライダーの側面の長さとほぼ等しくした
ことを特徴とするものであり、磁気コアの磁路の断面積
を広くできるため、高出力が得られるものである。また
、磁気コアの側面がスライダーの側面にささえられてい
るため、斜め研削加工負荷に耐えやすくなり狭トラツク
化しやすくなるものである。The floating magnetic head according to the present invention has a magnetic core made of Mn-Zn ferrite bonded to the side surface of a slider made of non-magnetic ceramic, in which a magnetic gap portion is formed on the side surface of the slider, and magnetic It is characterized in that the length of the core is approximately equal to the length of the side surface of the slider, and because the cross-sectional area of the magnetic path of the magnetic core can be widened, high output can be obtained. Furthermore, since the side surface of the magnetic core is supported by the side surface of the slider, it can easily withstand the load of diagonal grinding, making it easier to narrow the track.
さらにスライダー材としてＭｎ−Ｚｎフェライト材を用
いても、スライダーと磁気コアを非磁性材にて接着して
いるためスライダーと磁気コアの絶縁を確保できるので
、何ら支障はない。Further, even if Mn--Zn ferrite material is used as the slider material, there is no problem because the slider and the magnetic core are bonded with a non-magnetic material, so insulation between the slider and the magnetic core can be ensured.
さらに、磁気ギャップ部をスライダーの側面部に形成し
ているため、ディスクの最外周部まで記録可能となる。Furthermore, since the magnetic gap portion is formed on the side surface of the slider, it is possible to record up to the outermost periphery of the disk.
また、スライダー側面の長さに対する磁気コアの長さの
比が０．６〜１．０としてもモノリシック型の再生出力
に対し、９０％以上の再生出力を得られるが、比が０．
８〜１．０の範囲では、モノリシック型と同等の再生出
力を得られるものである。Further, even if the ratio of the length of the magnetic core to the length of the slider side surface is 0.6 to 1.0, a reproduction output of 90% or more can be obtained compared to that of a monolithic type, but if the ratio is 0.6 to 1.0, a reproduction output of 90% or more can be obtained.
In the range of 8 to 1.0, reproduction output equivalent to that of a monolithic type can be obtained.
以下実施例及び比較例を参照しながら本発明についてさ
らに詳細に説明する。第１．２図に実施例及び比較例を
示す０Ｍｎ０３１モル％、 ＺｎＯ１６モル％、 Ｆｅ
ｅ’ｓ ５３モル％よりなるフェライトコアの磁気ギャ
ップ形成面にＦｅ８５＋４ｔ％、ＡＩｔ６ｓｍｔ％、５
１９ｗｔ％の金属磁性薄膜を２μｍ厚に形成し、さらに
フェライトコア対向面へガラスを０．６μｍ厚にスパッ
タした。この後コア同志をガラスで７００℃にて溶着し
た０次いでこの溶着体を切断し、磁気ヘッドコアを作製
した。The present invention will be described in more detail below with reference to Examples and Comparative Examples. Examples and comparative examples are shown in Figure 1.2. 0Mn031 mol%, ZnO 16 mol%, Fe
Fe85+4t%, AIt6smt%, 5 on the magnetic gap forming surface of the ferrite core consisting of 53 mol%
A 19 wt % metal magnetic thin film was formed to a thickness of 2 μm, and glass was further sputtered to a thickness of 0.6 μm on the surface facing the ferrite core. Thereafter, the cores were welded together using glass at 700° C. The welded body was then cut to produce a magnetic head core.
次いでスライダー側面に低融点ガラスを５μｍ厚にスパ
ッタし、スライダーと磁気コアを加圧しながら５２０℃
に加熱し溶着することによってスライダーと磁気コアを
溶着した。次にエアーベアリング面をラップ加工した後
、露出した磁気コアの片面側を斜め研削加工することに
より、トラック幅Ｗを形成した。この場合、磁気コアの
側面はスライダーの側面にささえられているため、斜め
研削加工負荷に耐えやすくなっており、７μｍ幅のトラ
ック幅までカケを発生することなく加工することができ
た。またスライダー側面の長さ１０に対する磁気コアの
長さｌの比を、比較例１では０．３２．比較例２では０
．５．実施例１では０．６．実施例２では０．８．実施
例３では１．０として、記録電流に対する再生出力を比
較した。第３図、第１表に示すように、モノリシック型
ヘッドの再生出力を１とすると、比較例１は０．８．比
較例２は０．８７となった。実施例２，３においてはモ
ノリシック型ヘッドとほぼ同等の再生出力を得られた。Next, low-melting glass was sputtered to a thickness of 5 μm on the side of the slider, and heated to 520°C while applying pressure to the slider and magnetic core.
The slider and magnetic core were welded together by heating and welding. Next, after lapping the air bearing surface, the track width W was formed by diagonally grinding one side of the exposed magnetic core. In this case, since the side surfaces of the magnetic core were supported by the side surfaces of the slider, it was easier to withstand the load of diagonal grinding, and it was possible to process up to a track width of 7 μm without causing any chips. Further, the ratio of the length l of the magnetic core to the length 10 of the slider side surface was 0.32 in Comparative Example 1. 0 in comparative example 2
．． 5. In Example 1, 0.6. In Example 2, 0.8. In Example 3, the reproduction output was compared with respect to the recording current by setting it to 1.0. As shown in FIG. 3 and Table 1, when the reproduction output of the monolithic head is 1, Comparative Example 1 has an output of 0.8. Comparative Example 2 had a value of 0.87. In Examples 2 and 3, almost the same reproduction output as the monolithic head was obtained.
なお、媒体の測定半径は２２．９ｍ、回転数は３６００
ｒｐｍ。The measurement radius of the medium is 22.9 m, and the number of rotations is 3600.
rpm.
浮上量は０６１８μｍ、）ラック幅は１２μｍである。The flying height is 0618 μm, and the rack width is 12 μm.
本実施例において、２つのエアーベアリング面の幅をほ
ぼ等しくしたため２つのエアーベアリング面の流出端に
おける浮上量の差は０．０３μｍ以下でもった。In this example, since the widths of the two air bearing surfaces were made almost equal, the difference in flying height at the outflow end of the two air bearing surfaces was 0.03 μm or less.
第１表
上型磁気ヘッドの斜視図、第５図は従来のコジット型浮
上型磁気ヘッドの斜視図である。FIG. 5 is a perspective view of a conventional coduit-type floating magnetic head.
ｌ・・・エアーヘアリング面、２・・・トランク。l...Air hair ring surface, 2...Trunk.
磁気ギャップ、４・・・スライダー、５・・・スリ・ノ
ロ・・・磁気コア、７・・・ガラス
ンボ
３・・・
ト。Magnetic gap, 4...slider, 5...pickpocket...magnetic core, 7...glass board 3...t.
以上の実施側からも明らかな通り、本発明の磁気ヘッド
はコンポジット型磁気ヘッドにもかかわらず、モノリシ
ック型磁気ヘッドと同等な再生出力が得られるものであ
り、小型ディスク装置において、低速度、高記録密度化
に対応し得るものである。なお、磁気コアが多結晶フェ
ライトや単結晶フェライトでも発明の効果は変わらない
。As is clear from the implementation described above, although the magnetic head of the present invention is a composite magnetic head, it can obtain the same reproduction output as a monolithic magnetic head, and can be used in small disk devices at low speeds and high speeds. This makes it possible to cope with increasing recording density. Note that the effects of the invention do not change even if the magnetic core is made of polycrystalline ferrite or single-crystalline ferrite.
第１図、第２図は本発明の実施例の浮上型磁気ヘッドの
斜視図であり、第３図は測定結果を示すグラフである。
第４図は従来のモノリシック型浮第
図
第
図
す
第２
図
記録電流（ｍＡＰ
第
図
第
図1 and 2 are perspective views of a floating magnetic head according to an embodiment of the present invention, and FIG. 3 is a graph showing measurement results. Figure 4 shows the conventional monolithic type floating diagram. Figure 2 shows recording current (mAP).
Claims (3)
Ｍｎ−Ｚｎフェライトよりなる磁気コアを接着した浮上
型磁気ヘッドにおいて、磁気ギャップ部をスライダーの
側面部に形成し、スライダーの側面の長さに対する磁気
コアの長さの比が０．６以上であることを特徴とする浮
上型磁気ヘッド。(1) In a floating magnetic head in which a magnetic core made of Mn-Zn ferrite is bonded to the side surface of a slider made of nonmagnetic ceramics, a magnetic gap portion is formed on the side surface of the slider, and the magnetic core is adjusted to the length of the side surface of the slider. A floating magnetic head characterized in that the length ratio of is 0.6 or more.
る磁気コアを接着した浮上型磁気ヘッドにおいて、スラ
イダー材をＭｎ−Ｚｎフェライトとし、スライダーの側
面と磁気コアを非磁性材にて接着したことを特徴とする
浮上型磁気ヘッド。(2) A floating magnetic head with a magnetic core made of Mn-Zn ferrite bonded to the side surface of the slider, characterized in that the slider material is Mn-Zn ferrite, and the side surface of the slider and the magnetic core are bonded with a non-magnetic material. A floating magnetic head.
磁性フェライトの磁気ギャップ形成面に金属磁性薄膜を
付与してなる磁気コアを用いたことを特徴とする浮上型
磁気ヘッド。(3) In claim 1 or 2, Mn-Zn
A floating magnetic head characterized by using a magnetic core formed by applying a metal magnetic thin film to the magnetic gap forming surface of magnetic ferrite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10409190A JPH043308A (en) | 1990-04-19 | 1990-04-19 | Floating magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10409190A JPH043308A (en) | 1990-04-19 | 1990-04-19 | Floating magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH043308A true JPH043308A (en) | 1992-01-08 |
Family
ID=14371454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10409190A Pending JPH043308A (en) | 1990-04-19 | 1990-04-19 | Floating magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH043308A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52138577A (en) * | 1976-05-14 | 1977-11-18 | Mitsubishi Heavy Ind Ltd | Apparatus for forming breaker layer |
| EP0602486A2 (en) * | 1992-12-14 | 1994-06-22 | Minebea Co.,Ltd. | Floating magnetic head |
| US5847736A (en) * | 1994-05-17 | 1998-12-08 | Seiko Epson Corporation | Ink jet recorder and recording head cleaning method |
| US6278581B1 (en) * | 1992-05-28 | 2001-08-21 | Minebea Co., Ltd. | Floating magnetic head having a magnetic head core fixed to a slider side surface |
-
1990
- 1990-04-19 JP JP10409190A patent/JPH043308A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52138577A (en) * | 1976-05-14 | 1977-11-18 | Mitsubishi Heavy Ind Ltd | Apparatus for forming breaker layer |
| US6278581B1 (en) * | 1992-05-28 | 2001-08-21 | Minebea Co., Ltd. | Floating magnetic head having a magnetic head core fixed to a slider side surface |
| EP0602486A2 (en) * | 1992-12-14 | 1994-06-22 | Minebea Co.,Ltd. | Floating magnetic head |
| EP0602486A3 (en) * | 1992-12-14 | 1995-08-23 | Minebea Co Ltd | Floating magnetic head. |
| US5548459A (en) * | 1992-12-14 | 1996-08-20 | Minebea Co., Ltd. | Floating magnetic head |
| US5847736A (en) * | 1994-05-17 | 1998-12-08 | Seiko Epson Corporation | Ink jet recorder and recording head cleaning method |
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