JPH04163707A - Magnetic head - Google Patents
Magnetic headInfo
- Publication number
- JPH04163707A JPH04163707A JP29032790A JP29032790A JPH04163707A JP H04163707 A JPH04163707 A JP H04163707A JP 29032790 A JP29032790 A JP 29032790A JP 29032790 A JP29032790 A JP 29032790A JP H04163707 A JPH04163707 A JP H04163707A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- film
- magnetic film
- conversion gap
- 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.)
- Granted
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 35
- 230000004907 flux Effects 0.000 claims abstract description 21
- 238000010030 laminating Methods 0.000 claims abstract description 10
- 239000010408 film Substances 0.000 claims description 91
- 239000010409 thin film Substances 0.000 claims description 7
- 230000008929 regeneration Effects 0.000 abstract 1
- 238000011069 regeneration method Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 10
- 230000005415 magnetization Effects 0.000 description 6
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 2
- BYFGZMCJNACEKR-UHFFFAOYSA-N aluminium(i) oxide Chemical compound [Al]O[Al] BYFGZMCJNACEKR-UHFFFAOYSA-N 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229920003986 novolac Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
Landscapes
- 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、磁気ヘッドに関し、変換ギャップを間に挟ん
で向き合う一対のポールの少なくとも一方、特に媒体流
出端側に位置するポールを、複数の磁性膜の積層構造と
し、変換ギャップに隣接する磁性膜を、他の磁性膜より
も飽和磁束密度が大きく、かつ、厚みの薄い磁性膜とす
ることにより、磁界分布及び再生波形を鋭化し、高密度
記録対応を図ると共に、オーバライド特性を向上させた
磁気ヘッドを提供で鮒るようにしたものである。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a magnetic head, and relates to a magnetic head in which at least one of a pair of poles facing each other with a conversion gap in between, particularly the pole located on the media outlet end side, is connected to a plurality of magnetic heads. By adopting a stacked structure of magnetic films, and making the magnetic film adjacent to the conversion gap a thinner magnetic film with a higher saturation magnetic flux density than other magnetic films, the magnetic field distribution and reproduction waveform are sharpened and high In addition to being compatible with high-density recording, the magnetic head is designed to provide improved override characteristics.
〈従来の技術〉
磁気ヘッドは、周知のように、変換ギャップを間に挟ん
で向き合う一対のポールを有する構造となっている。第
５図は従来の磁気ヘッドの基本的な構造と書き込み時の
磁界分布を示す図である。<Prior Art> As is well known, a magnetic head has a structure including a pair of poles facing each other with a conversion gap in between. FIG. 5 is a diagram showing the basic structure of a conventional magnetic head and the magnetic field distribution during writing.
Ｐ、、Ｐ２はポール、Ｇは変換ギャップ、ａは媒体走行
方向、Ｍは磁気ディスク等の磁気記録媒体を示している
。Ｌ２は書き込み時の磁界分布、Ｍｏは磁化反転部、ｍ
、 、ｍ２は磁化方向、ρ１は磁化反転領域をそれぞれ
示している。磁化反転領域ｊ２．は、主として、媒体流
出側のポール、即ち、媒体走行方向ａで見て後方に位置
するポール（図示の場合ポールＰ、）側の磁界によって
決まる。P, , P2 are poles, G is a conversion gap, a is a medium running direction, and M is a magnetic recording medium such as a magnetic disk. L2 is the magnetic field distribution during writing, Mo is the magnetization reversal part, m
, , m2 indicate the magnetization direction, and ρ1 indicates the magnetization reversal region, respectively. Magnetization reversal region j2. is mainly determined by the magnetic field on the side of the pole on the medium outflow side, that is, the pole (pole P in the illustrated case) located at the rear when viewed in the medium running direction a.
第６図は上記磁気ヘッドとその再生波形Ｌ１を示す図で
ある。再生波形り、は第５図に示したポール構造及び磁
界分布を有する磁気ヘッドを使用して磁気記録媒体に記
録した信号を、同じ磁気ヘッドで再生した場合の波形で
あり、横軸に時間軸をとり、縦軸に瞬時値ｅと最大値Ｅ
ｍとの比（ｅ ／ Ｅ ｍ ）を百分率で表示しである
。Ｌｌｌ、Ｌ１２はアンダーシュートを示している。Ｐ
Ｗ、。は（ｅ ／ Ｅ ｍ ）が５０％になるパルス幅
を示している。ＰＷ５ｏ値は再生波形Ｌ１の鋭化の程度
を示し、ＰＷ、。値が小さければ再生波形Ｌ１は鋭くな
り、大きくなれば鈍化する。FIG. 6 is a diagram showing the magnetic head and its reproduction waveform L1. The reproduced waveform is the waveform when a signal recorded on a magnetic recording medium using a magnetic head having the pole structure and magnetic field distribution shown in Fig. 5 is reproduced by the same magnetic head, and the horizontal axis is the time axis. , and the vertical axis shows the instantaneous value e and the maximum value E
The ratio with m (e/E m ) is expressed as a percentage. Lll and L12 indicate undershoot. P
W. indicates the pulse width at which (e/E m ) is 50%. The PW5o value indicates the degree of sharpening of the reproduced waveform L1, PW. If the value is small, the reproduced waveform L1 becomes sharp, and if the value becomes large, it becomes dull.
〈発明が解決しようとする課題〉
しかしながら、上述した従来の磁気ヘッドには次のよう
な問題がある。<Problems to be Solved by the Invention> However, the conventional magnetic head described above has the following problems.
（Ａ）高密度記録に対応するためには、再生波形Ｌ１を
鋭化し、隣接パルスの相互干渉を防止する必要がある。(A) In order to cope with high-density recording, it is necessary to sharpen the reproduction waveform L1 and prevent mutual interference between adjacent pulses.
再生波形り、の鋭化の程度は、前述したようにＰＷｓｏ
値によって評価する。磁気ヘッドの磁界分布し２は、主
として、ポールＰ１、Ｐ２の端面形状によって定まる。The degree of sharpening of the reproduced waveform is determined by PWso as described above.
Evaluate by value. The magnetic field distribution 2 of the magnetic head is mainly determined by the shape of the end faces of the poles P1 and P2.
従来の磁気ヘッドでは、ポールＰＬ、Ｐ２の端面の厚み
ＴＡ１Ｔ！ｌによって定まる以上には、磁界分布し２を
鋭化することができない。また、再生波形Ｌ１は、磁界
分布し２の他に、磁気記録媒体の磁性膜に不可避的に生
じる保磁力Ｈｃの差（保磁力分布）によっても鈍化する
。このため、再生波形Ｌ２をより一層鋭化することが困
難で、高密度記録を達成する上の一つの大きな障害にな
っていた。In the conventional magnetic head, the thickness of the end face of poles PL and P2 is TA1T! The magnetic field distribution cannot be sharpened beyond that determined by l. In addition to the magnetic field distribution 2, the reproduced waveform L1 is also slowed down by the difference in coercive force Hc (coercive force distribution) that inevitably occurs in the magnetic film of the magnetic recording medium. For this reason, it has been difficult to further sharpen the reproduced waveform L2, which has been a major obstacle in achieving high-density recording.
（Ｂ）ポールＰＩ、Ｐ２の厚みＴ Ａ 、 Ｔ ａを小
さくすれば、再生波形を鋭化できる。しかしながら、ポ
ールＰＩ、Ｐ２の厚みＴ Ａ、 Ｔ ａを小さくすると
磁気飽和が起こり、書き込み能力が低下し、オーバライ
ド特性が劣化する。(B) By reducing the thicknesses T A and T a of the poles PI and P2, the reproduced waveform can be sharpened. However, if the thicknesses T A and T a of the poles PI and P2 are made small, magnetic saturation occurs, the writing ability decreases, and the override characteristic deteriorates.
（Ｃ）第６図に示すように、再生波形はポールＰ＋、Ｐ
２のｔ４縁に対応する位置でアンダーシュートＬｌｌ、
Ｌ１２を生じる。アンダーシュートＬｌｌ、Ｌ１２は、
特にポール厚みの薄い薄膜磁気ヘッドにおいて、顕著に
現われる。薄膜磁気ヘッドにおいては、バルク型磁気ヘ
ッドと異なって、磁気記録媒体Ｍの走行方向ａで見たポ
ールＰ１、Ｐ２の端部の厚みが薄く、有限であるため、
パルスの他に、ポールＰ、、Ｐ２の各端部による疑似パ
ルスが発生するためである。(C) As shown in Figure 6, the reproduced waveform is pole P+, P
Undershoot Lll at the position corresponding to the t4 edge of 2,
yields L12. Undershoot Lll, L12 is
This is particularly noticeable in thin-film magnetic heads with thin poles. In a thin film magnetic head, unlike a bulk type magnetic head, the thickness of the ends of the poles P1 and P2 as seen in the running direction a of the magnetic recording medium M is thin and finite.
This is because, in addition to pulses, pseudo pulses are generated by each end of the poles P, P2.
アンダーシュートし１１、Ｌ１２の存在は、高密度記録
の場合、ピークシフトを大きくするため、読み出しのエ
ラーマージンもしくは位相マージンに限界を生じ、高密
度記録の大きな障害となる。In the case of high-density recording, the presence of undershoots 11 and L12 increases the peak shift, which limits the read error margin or phase margin, and becomes a major hindrance to high-density recording.
そこで、本発明の課題は、上述する従来の問題点を解決
し、磁界分布及び再生波形を鋭化して高密度記録対応を
図った書き込み能力の高い磁気ヘッドを提供することで
ある。SUMMARY OF THE INVENTION An object of the present invention is to solve the above-mentioned conventional problems and to provide a magnetic head with high writing ability that is compatible with high-density recording by sharpening the magnetic field distribution and reproduction waveform.
く課題を解決するための手段〉
上述したｉ！題解決のため、本発明は、変換ギャップを
間に挟んで向き合う一対のポールを有する磁気ヘッドで
あって、
前記一対のポールのうち、少なくとも一方は、複数の磁
性膜を積層して構成されており、前記磁性膜のうち、前
記変換ギャップに隣接する磁性膜は、他の磁性膜よりも
飽和磁束密度が大きく、かつ、厚みが薄いこと
を特徴とする。Means for solving the above-mentioned i! To solve this problem, the present invention provides a magnetic head having a pair of poles facing each other with a conversion gap in between, wherein at least one of the pair of poles is configured by laminating a plurality of magnetic films. Among the magnetic films, the magnetic film adjacent to the conversion gap has a higher saturation magnetic flux density and is thinner than other magnetic films.
く作用〉
変換ギャップを間に挟んで向き合う一対のポールのうち
、少なくとも一方は、複数の磁性膜を積層して構成され
ており、複数の磁性膜のうち、変換ギャップに隣接する
磁性膜は、他の磁性膜よりも飽和磁束密度が大きい、変
換ギャップに向う程、磁束が集中し易くなる。このため
、磁界分布及び再生波形が鋭化される。従って、高密度
記録再生が可能になる。特に媒体流出端側のポールを複
数の磁性膜を積層して構成し、変換ギャップに隣接する
磁性膜を、他の磁性膜よりも飽和磁束密度が大きく、か
つ、厚みが薄い構造とした場合、媒体上の磁化分布を決
定する媒体流出端側における磁界強度の傾斜が急峻にな
り、好ましい磁気記録が得られる。Effect> At least one of the pair of poles facing each other with the conversion gap in between is constructed by laminating a plurality of magnetic films, and among the plurality of magnetic films, the magnetic film adjacent to the conversion gap is The magnetic flux becomes more concentrated toward the conversion gap, where the saturation magnetic flux density is higher than that of other magnetic films. Therefore, the magnetic field distribution and reproduction waveform are sharpened. Therefore, high-density recording and reproduction becomes possible. In particular, when the pole on the medium outflow end side is constructed by laminating multiple magnetic films, and the magnetic film adjacent to the conversion gap has a structure that has a higher saturation magnetic flux density and is thinner than other magnetic films, The slope of the magnetic field strength on the medium outlet side, which determines the magnetization distribution on the medium, becomes steeper, and favorable magnetic recording can be obtained.
しかも、変換ギャップに隣接する磁性膜は、他の磁性膜
よりも厚みが薄いから、磁束の集中が一層促進され、磁
界分布及び再生波形が一層鋭化される。Furthermore, since the magnetic film adjacent to the conversion gap is thinner than other magnetic films, the concentration of magnetic flux is further promoted, and the magnetic field distribution and reproduction waveform are further sharpened.
磁束の集中の程度は、変換ギャップ膜に隣接する磁性膜
または積層される他の磁性膜の磁気特性、厚みを選択す
ることによって制御できる。これにより、使用周波数に
合わせて、磁界分布及び再生波形を鋭化できる。The degree of concentration of magnetic flux can be controlled by selecting the magnetic properties and thickness of the magnetic film adjacent to the transducer gap film or other magnetic films to be laminated. This allows the magnetic field distribution and reproduction waveform to be sharpened in accordance with the frequency used.
ポール端面としての全体の先端厚みは、ポールを構成す
る磁性膜の積層構造全体の厚みであるから、優れた書き
込み能力を確保できる。Since the total thickness of the tip as the end face of the pole is the thickness of the entire laminated structure of the magnetic films constituting the pole, excellent writing ability can be ensured.
〈実施例〉
第１図は本発明に係る磁気ヘッドのポール部分の構造と
その磁界分布を示す図である。変換ギャップＧを間に挟
んで向き合う一対のポールＰ１、Ｐ２を有している。一
対のポールＰＩ、Ｐ２のうち、少なくとも媒体流出端側
のポールＰ、は、磁性膜Ｐｌ＋及び磁性ＨＰ１□を積層
して構成されている。磁性膜ｐＨ及び磁性膜Ｐ１２のう
ち、変換ギャップＧに隣接する磁性膜Ｐｌ＋は、磁性膜
Ｐ１２よりも飽和磁束密度が大きく、かつ、厚みＴ目が
磁性膜ＰＩ２の厚みＴ１２よりも薄くなっている。具体
的には、磁性膜Ｐ１２をＮｉＦｅで構成した場合、磁性
膜ｐＨはＣｏＮｂＺｒテ構成する。厚みＴ目、ＴＩ２の
比（ＴＩ２／Ｔ＋＋）は、
１＜ＴＩ２／Ｔ１ｙ≦２５
の範囲が適当である。<Example> FIG. 1 is a diagram showing the structure of a pole portion of a magnetic head according to the present invention and its magnetic field distribution. It has a pair of poles P1 and P2 facing each other with a conversion gap G in between. Of the pair of poles PI and P2, at least the pole P on the medium outflow end side is configured by laminating a magnetic film Pl+ and a magnetic HP1□. Among the magnetic film pH and the magnetic film P12, the magnetic film Pl+ adjacent to the conversion gap G has a higher saturation magnetic flux density than the magnetic film P12, and the thickness T is thinner than the thickness T12 of the magnetic film PI2. . Specifically, when the magnetic film P12 is made of NiFe, the pH of the magnetic film is made of CoNbZr. The ratio of thickness T and TI2 (TI2/T++) is suitably in the following range: 1<TI2/T1y≦25.
上述のように、変換ギャップＧを間に挟んで向艶合う一
対のポールＰＩ、Ｐ２のうち、少なくともポールＰ、は
、複数の磁性膜Ｐ １１％ Ｐ １２を積層して構成さ
れており、複数の磁性膜Ｐ ｌｌｘ Ｐ １２のうち、
変換ギャップＧに隣接する磁性膜ｐＨは、他の磁性膜Ｐ
１２よりも飽和磁束密度が大きいから、変換ギャップＧ
に向う程、磁束が集中し易くなる。このため、磁界分布
し、が第１図に示すように鋭化されると共に、再生波形
Ｌ１が第２図に示すように鋭化され、ＰＷＳ。値が小さ
くなる。As described above, among the pair of poles PI and P2 that face each other with the conversion gap G in between, at least the pole P is constructed by laminating a plurality of magnetic films P11% P12, and a plurality of Of the magnetic film P llx P 12,
The pH of the magnetic film adjacent to the conversion gap G is higher than that of the other magnetic film P.
Since the saturation magnetic flux density is larger than 12, the conversion gap G
The closer it is to the magnetic flux, the easier it is to concentrate the magnetic flux. Therefore, the magnetic field distribution is sharpened as shown in FIG. 1, and the reproduced waveform L1 is sharpened as shown in FIG. 2, resulting in PWS. The value becomes smaller.
従って、高密度記録再生が可能になる。特に、媒体流出
端側のポールＰ１を複数の磁性膜ｐＨ％Ｐ１２を積層し
て構成し、変換ギャップＧに隣接する磁性１１１１ Ｐ
＋ １を、磁性膜Ｐ１２よりも飽和磁束密度が大きく
、かつ、厚みが薄い構造とした場合、媒体Ｍ上の磁化分
布を決定する媒体流出端側における磁界強度の傾斜が急
峻になり、好ましい磁気記録が得られる。Therefore, high-density recording and reproduction becomes possible. In particular, the pole P1 on the medium outflow end side is constructed by laminating a plurality of magnetic films pH%P12, and the magnetic film 1111P adjacent to the conversion gap G is
+ 1 has a structure with a higher saturation magnetic flux density and a smaller thickness than the magnetic film P12, the slope of the magnetic field strength on the medium outlet side, which determines the magnetization distribution on the medium M, becomes steeper, resulting in a preferable magnetic field. Records are obtained.
しかも、変換ギャップＧに隣接する磁性膜ｐＨは、磁性
膜Ｐ１２よりも厚みが薄いから、磁束の集中が一層促進
され、磁界分布し２及び再生波形り、が−層鋭化される
。Moreover, since the magnetic film pH adjacent to the conversion gap G is thinner than the magnetic film P12, the concentration of magnetic flux is further promoted, and the magnetic field distribution 2 and reproduction waveform are sharpened.
ポールＰＩ としての全体の先端厚みは、ポールＰ１１
、ＰＩ２を構成する磁性膜ｐＨ、ＰＩ２の積層構造全体
の厚み（Ｔ ＋＋＋ Ｔ Ｉ２）であるから、優れた書
き込み能力を確保できる。The overall tip thickness as pole PI is pole P11
, the pH of the magnetic film constituting PI2, and the thickness of the entire stacked structure of PI2 (T +++ T I2), so excellent writing ability can be ensured.
第３図は本発明に係る磁気ヘッドの別の実施例を示す図
である。この実施例では、ポールＰ２も、磁性ＩｎＩ
Ｐ ２１及び磁性Ｉｌｌ Ｐ ２２を積層して構成され
ている。変換ギャップＧに隣接する磁性膜Ｐ２１は、磁
性膜Ｐ２２よりも飽和磁束密度が大きく、かつ、厚みＴ
２１が磁性膜Ｐ２２の厚みＴ２２よりも薄くなっている
。厚みの比（Ｔ２２／Ｔ２＋）は、ポールＰ、の場合と
同様に、
１ ＜ ７２２／ Ｔ ２１≦２５
の範囲が適当である。第３図の実施例の場合は、ポール
Ｐ１％Ｐ２の両者において、磁界分布し２及び再生波形
Ｌ１が鋭化される。第３図の曲線Ｌ３は従来磁気ヘッド
の再生波形である。FIG. 3 is a diagram showing another embodiment of the magnetic head according to the present invention. In this example, pole P2 is also magnetic InI
It is constructed by laminating P 21 and magnetic Ill P 22. The magnetic film P21 adjacent to the conversion gap G has a higher saturation magnetic flux density than the magnetic film P22 and has a thickness T.
21 is thinner than the thickness T22 of the magnetic film P22. As in the case of the pole P, the thickness ratio (T22/T2+) is suitably in the range of 1 < 722/T 21 < 25. In the case of the embodiment shown in FIG. 3, the magnetic field distribution 2 and the reproduced waveform L1 are sharpened at both poles P1 and P2. A curve L3 in FIG. 3 is a reproduction waveform of a conventional magnetic head.
第４図は本発明を通用した薄膜磁気ヘッドのトランスジ
ューサ部分の断面図である。１はセラミックで構成され
た基体、２は下部磁性膜、３はアルミナ等でなるギャッ
プ膜、４は上部磁性膜、５はコイル膜、６はノボラック
樹脂等の有機絶縁樹脂で構成された絶縁膜、７はアルミ
ナ等の保護膜である。FIG. 4 is a sectional view of a transducer portion of a thin film magnetic head to which the present invention is applied. 1 is a base made of ceramic, 2 is a lower magnetic film, 3 is a gap film made of alumina, etc., 4 is an upper magnetic film, 5 is a coil film, and 6 is an insulating film made of organic insulating resin such as novolac resin. , 7 is a protective film made of alumina or the like.
基体１はＡｌ２Ｏ，−ＴｉＯ，等で構成された本体部１
０１の表面にＡｌ２Ｏ５等でなる絶縁膜１０２を設け、
この絶縁ｆｉ１０２の上に磁気回路を形成しである。下
部磁性膜２及び上部磁性膜４の先端部はアルミナ等でな
るギャップ膜３を隔てて対向するポールＰ、、Ｐ、とな
フており、このポールＰ２．Ｐ、において読み書きを行
なう。ポールＰ１及びポールＰ２は、ギャップ膜３によ
る変換ギャップＧを介して対向している。上部磁性膜４
はポールＰ＋ とは反対側の後方領域において、結合部
４０によって下部磁性膜２のヨーク部２０と結合されて
いる。コイル膜５は結合部４ｏを渦巻状に回るように形
成されている。The base 1 is a main body 1 made of Al2O, -TiO, etc.
An insulating film 102 made of Al2O5 or the like is provided on the surface of 01,
A magnetic circuit is formed on this insulating fi 102. The tips of the lower magnetic film 2 and the upper magnetic film 4 form poles P, , P, which face each other across a gap film 3 made of alumina or the like. Read and write at P. The pole P1 and the pole P2 face each other with a conversion gap G formed by the gap film 3 interposed therebetween. Upper magnetic film 4
is coupled to the yoke portion 20 of the lower magnetic film 2 by a coupling portion 40 in the rear region opposite to the pole P+. The coil film 5 is formed so as to spiral around the coupling portion 4o.
下部磁性膜２は、磁性膜Ｐ２１及び磁性膜Ｐ２２を積層
した構造となっている。ギャップ膜３に隣接する磁性膜
Ｐ２□はＣｏＮｂＺｒで構成され、磁性膜Ｐ２□はＮｉ
Ｆｅで構成されている。これらの磁性ＩＩ！ Ｐ Ｒ＋
、Ｐ２２はポールＰ２の部分まで延長して設けられてい
る。変換ギャップＧに隣接する磁性ｆｉｌ Ｐ ２１は
、厚みが磁性膜Ｐ２２よりも薄くなっている。The lower magnetic film 2 has a structure in which a magnetic film P21 and a magnetic film P22 are laminated. The magnetic film P2□ adjacent to the gap film 3 is made of CoNbZr, and the magnetic film P2□ is made of Ni.
It is composed of Fe. These magnetic II! PR+
, P22 are provided extending to the pole P2. The magnetic film P21 adjacent to the conversion gap G is thinner than the magnetic film P22.
上部磁性膜４は磁性膜ｐＨ及び磁性膜ＰＩ２を積層した
構造となっている。ギャップｗＡ３に隣接する磁性ＷＡ
Ｐ ＋ ＋はＣｏＮｂＺｒで構成され、磁性膜ＰＩ２
はＮｉＦｅで構成されている。これらの磁性膜ｐＨ％Ｐ
１２はポールＰ、の部分まで延長して設けられており、
ポールＰ１において、磁性Ｍ Ｐ ＋ 、及び磁性膜Ｐ
Ｉ２を構成している。変換ギャップＧに隣接する磁性膜
Ｐｌ＋は、厚みが磁性膜Ｐ１２よりも薄くなっている。The upper magnetic film 4 has a structure in which a magnetic film pH and a magnetic film PI2 are laminated. Magnetic WA adjacent to gap wA3
P + + is composed of CoNbZr, and the magnetic film PI2
is made of NiFe. These magnetic films pH%P
12 is extended to the part of the pole P,
At the pole P1, the magnetic M P + and the magnetic film P
It constitutes I2. The magnetic film Pl+ adjacent to the conversion gap G is thinner than the magnetic film P12.
第４図では磁性膜Ｐ１１、Ｐ１２、Ｐ２＋、Ｐ２２は、
上部磁性膜４及び下部磁性膜２の全体にわたって設けで
あるが、ポールＰＩ、Ｐ２の領域に限フて設けてもよい
。また、薄膜磁気ヘッドを例にとって説明したが、例え
ばモノリシック型磁気ヘッドやコンポジット型磁気ヘッ
ド等にも本発明は同様に適用できる。In FIG. 4, the magnetic films P11, P12, P2+, and P22 are
Although it is provided over the entirety of the upper magnetic film 4 and the lower magnetic film 2, it may be provided only in the regions of the poles PI and P2. Further, although the description has been given using a thin film magnetic head as an example, the present invention can be similarly applied to, for example, a monolithic magnetic head, a composite magnetic head, and the like.
〈発明の効果〉
以上述べたように、本発明によれば、次のような効果が
得られる。<Effects of the Invention> As described above, according to the present invention, the following effects can be obtained.
（ａ）変換ギャップを間に挟んで向き合う一対のポール
のうち、少なくとも一方は、複数の磁性膜を積層して構
成されており、複数の磁性膜のうち、変換ギャップに隣
接する磁性膜は、他の磁性膜よりも飽和磁束密度が大き
いから、磁界分布及び再生波形を鋭化し、高密度記録再
生に適した磁気ヘッドを提供できる。(a) At least one of a pair of poles facing each other with a conversion gap in between is configured by laminating a plurality of magnetic films, and among the plurality of magnetic films, the magnetic film adjacent to the conversion gap is Since the saturation magnetic flux density is higher than that of other magnetic films, the magnetic field distribution and reproduction waveform can be sharpened, and a magnetic head suitable for high-density recording and reproduction can be provided.
（ｂ）変換ギャップに隣接する磁性膜は、他の磁性膜よ
りも厚みが薄いから、磁束集中を一層促進し、磁界分布
及び再生波形を一層鋭化した高密度記録再生用の磁気ヘ
ッドを提供できる。(b) Since the magnetic film adjacent to the conversion gap is thinner than other magnetic films, it further promotes magnetic flux concentration and provides a magnetic head for high-density recording and reproduction that further sharpens magnetic field distribution and reproduction waveform. can.
（Ｃ）変換ギャップ膜に隣接する磁性膜または積層され
る他の磁性膜の磁気特性、厚みを選択することにより、
使用周波数に合わせて、磁界分布及び再生波形を鋭化し
得る磁気ヘッドを提供できる。(C) By selecting the magnetic properties and thickness of the magnetic film adjacent to the conversion gap film or other magnetic films to be laminated,
It is possible to provide a magnetic head that can sharpen the magnetic field distribution and reproduction waveform according to the frequency used.
（ｄ）ポール磁界分布及び再生波形の鋭化と共に、書き
込み能力を確保し、オーバライド特性の優れた高密度記
録用磁気ヘッドを提供できる。(d) It is possible to provide a magnetic head for high-density recording that has sharper pole magnetic field distribution and reproduction waveform, secures writing ability, and has excellent override characteristics.
第１図は本発明に係る磁気ヘッドのポール部分の構造と
その磁界分布を示す図、第２図は同じくポール部分の構
造と再生波形とを示す図、第３図は本発明に係る磁気ヘ
ッドのポール部分の別の構造とその再生波形を示す図、
第、４図は本発明を通用した薄膜磁気ヘッドのトランス
ジューサ部分の断面図、第５図は従来の磁気ヘッドの基
本的な構造と書き込み時の磁界分布を示す図、第６図は
従来の磁気ヘッドとその再生波形を示す図である。
Ｐ、、Ｐ２ ・・・ポール
ｐＨ、ＰＩ２・・・磁性膜
Ｐ２１、Ｐ２２・・・磁性膜
Ｇ・・・変換ギャップFIG. 1 is a diagram showing the structure of the pole portion of the magnetic head according to the present invention and its magnetic field distribution, FIG. 2 is a diagram showing the structure of the pole portion and reproduction waveform, and FIG. 3 is a diagram showing the magnetic head according to the present invention. A diagram showing another structure of the pole part and its playback waveform,
4 is a cross-sectional view of the transducer portion of a thin-film magnetic head to which the present invention is applied, FIG. 5 is a diagram showing the basic structure of a conventional magnetic head and the magnetic field distribution during writing, and FIG. FIG. 3 is a diagram showing a head and its reproduction waveform. P,,P2...Pole pH, PI2...Magnetic film P21, P22...Magnetic film G...Conversion gap
Claims (3)
を有する磁気ヘッドであって、 前記一対のポールのうち、少なくとも一方は、複数の磁
性膜を積層して構成されており、前記磁性膜のうち、前
記変換ギャップに隣接する磁性膜は、他の磁性膜よりも
飽和磁束密度が大きく、かつ、厚みが薄いことを特徴と
する磁気ヘッド。(1) A magnetic head having a pair of poles facing each other with a conversion gap in between, wherein at least one of the pair of poles is configured by laminating a plurality of magnetic films, and wherein The magnetic head is characterized in that the magnetic film adjacent to the conversion gap has a higher saturation magnetic flux density and is thinner than other magnetic films.
出端側のポールであることを特徴とする請求項１に記載
の磁気ヘッド。(2) The magnetic head according to claim 1, wherein the pole having the plurality of magnetic films is a pole on a medium outflow end side.
た薄膜磁気ヘッドであることを特徴とする請求項１また
は２に記載の磁気ヘッド。(3) The magnetic head according to claim 1 or 2, wherein the magnetic head is a thin film magnetic head in which the pole and the conversion gap are formed of a thin film.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2290327A JP3051150B2 (en) | 1990-10-26 | 1990-10-26 | Thin film magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2290327A JP3051150B2 (en) | 1990-10-26 | 1990-10-26 | Thin film magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04163707A true JPH04163707A (en) | 1992-06-09 |
| JP3051150B2 JP3051150B2 (en) | 2000-06-12 |
Family
ID=17754641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2290327A Expired - Lifetime JP3051150B2 (en) | 1990-10-26 | 1990-10-26 | Thin film magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3051150B2 (en) |
-
1990
- 1990-10-26 JP JP2290327A patent/JP3051150B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JP3051150B2 (en) | 2000-06-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS5810764B2 (en) | magnetic recording and reproducing device | |
| JPH0291806A (en) | Vertically magnetized thin-film head | |
| JPH10320720A (en) | Magnetic head for perpendicular recording | |
| JPH04163707A (en) | Magnetic head | |
| JPH04163708A (en) | Magnetic head | |
| JP2565250B2 (en) | Magnetic head | |
| JPH04146510A (en) | Magnetic head | |
| JP3129765B2 (en) | Thin film magnetic head | |
| JPS60256907A (en) | Thin film magnetic head | |
| JP2513746B2 (en) | Perpendicular magnetic recording media | |
| JPS5996517A (en) | Magnetic recording and reproducing method | |
| JPH0327963B2 (en) | ||
| JP3044808B2 (en) | Magnetic head | |
| JPH0546934A (en) | Magnetic head and its manufacture | |
| JPH0192908A (en) | Magnetic head | |
| JPH05101310A (en) | Magnetic recording method | |
| JPH04328312A (en) | Thin-film magnetic head | |
| JPS63306507A (en) | Thin film magnetic head | |
| JPH04298805A (en) | Thin-film magnetic head | |
| JPH01155510A (en) | Magnetic head for vertical magnetic recording and reproduction | |
| JPS5817516A (en) | Magnetic head | |
| JPH05325132A (en) | Magnetic head | |
| JPS6236702A (en) | Magnetic recording method | |
| JPS6381616A (en) | Single magnetic pole type magnetic head for perpendicular recording | |
| JPH0152806B2 (en) |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090331 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100331 Year of fee payment: 10 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110331 Year of fee payment: 11 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110331 Year of fee payment: 11 |