JPH04195812A - Magnetic resistance effect type magnetic head - Google Patents
Magnetic resistance effect type magnetic headInfo
- Publication number
- JPH04195812A JPH04195812A JP32718990A JP32718990A JPH04195812A JP H04195812 A JPH04195812 A JP H04195812A JP 32718990 A JP32718990 A JP 32718990A JP 32718990 A JP32718990 A JP 32718990A JP H04195812 A JPH04195812 A JP H04195812A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetoresistive
- magnetoresistive element
- shield layer
- magnetic head
- 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
- 230000000694 effects Effects 0.000 title abstract description 6
- 239000000696 magnetic material Substances 0.000 claims abstract description 11
- 239000000758 substrate Substances 0.000 abstract description 9
- 230000001681 protective effect Effects 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 6
- 229910003271 Ni-Fe Inorganic materials 0.000 abstract description 2
- 238000013459 approach Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 17
- 238000009826 distribution Methods 0.000 description 10
- 239000010409 thin film Substances 0.000 description 6
- 239000010408 film Substances 0.000 description 5
- 239000011810 insulating material Substances 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000004544 sputter deposition Methods 0.000 description 2
- 229910017709 Ni Co Inorganic materials 0.000 description 1
- 229910003267 Ni-Co Inorganic materials 0.000 description 1
- 229910003262 Ni‐Co Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000001312 dry etching Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 230000005381 magnetic domain Effects 0.000 description 1
- 230000001105 regulatory effect Effects 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）
本発明は薄膜形成技術等により製作される高性能な磁気
抵抗効果型磁気ヘッドに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a high-performance magnetoresistive magnetic head manufactured by thin film forming technology or the like.
（従来の技術）
磁気抵抗を有する磁気抵抗素子（感磁部）に作用する信
号磁界による磁化方向と、磁気抵抗素子に流れる電流の
向きとのなす角によって磁気抵抗素子の電気抵抗（導電
率）が変化する性質を利用した磁気抵抗効果型磁気ヘッ
ドが知られている。(Prior art) The electrical resistance (conductivity) of a magnetoresistive element is determined by the angle formed by the direction of magnetization due to a signal magnetic field that acts on a magnetoresistive element (magnetic sensing part) and the direction of the current flowing through the magnetoresistive element. A magnetoresistive magnetic head is known that utilizes the property that the magnetic field changes.
この磁気抵抗効果型磁気ヘッドは、狭トラツク幅でも高
感度で出力が媒体速度に依存しないため、垂直磁気記録
による高密度の記録・再生用磁気ヘッドとじて注目され
ている。This magnetoresistive magnetic head is attracting attention as a magnetic head for high-density recording and reproducing using perpendicular magnetic recording because it has high sensitivity even with a narrow track width and its output does not depend on the medium speed.
斯かる磁気抵抗効果型磁気ヘッドとしては第８図（ａ）
に示すノンシールド型、第８図（ｂ）に示すヨーク型及
び第８図（Ｃ）に示すシールド型がある。FIG. 8(a) shows such a magnetoresistive magnetic head.
There are a non-shield type shown in FIG. 8, a yoke type shown in FIG. 8(b), and a shielded type shown in FIG. 8(C).
ノンシールド型は磁性薄膜からなる磁気抵抗素子１００
の両側に非磁性材１０１，１０１を配置し、且つ磁気抵
抗素子１００の一端を磁気記録媒体１０２との対向面に
露出したものであり、ヨーク型は磁気抵抗素子１００を
非磁性材１０１を介して軟磁性材からなるヨーク１０３
内に配置するとともに、磁気抵抗素子Ｚｏｏを磁気記録
媒体１０２との対向面から後方に位置させたものであり
、シールド型は、磁気抵抗素子１００の側方に非磁性材
１０１を介して軟磁性材からなるシールド層１０４を配
置し、且つ磁気抵抗素子１００の一端を磁気記録媒体１
０２との対向面に露出したものである。尚、第８図にお
いて５０１は基板、５０２は保護膜または保護基板であ
る。The non-shielded type is a magnetoresistive element 100 made of a magnetic thin film.
, and one end of the magnetoresistive element 100 is exposed on the surface facing the magnetic recording medium 102. In the yoke type, the magnetoresistive element 100 is placed through the nonmagnetic material 101. Yoke 103 made of soft magnetic material
In addition, the magnetoresistive element Zoo is located behind the surface facing the magnetic recording medium 102. In the shield type, a soft magnetic material is placed on the side of the magnetoresistive element 100 via a non-magnetic material 101. A shield layer 104 made of material is arranged, and one end of the magnetoresistive element 100 is connected to the magnetic recording medium 1.
It is exposed on the surface facing 02. In FIG. 8, 501 is a substrate, and 502 is a protective film or a protective substrate.
そして上記のシールド型の磁気ヘッドとして特開昭６０
−１４５５２０号及び特開昭６１−２４２３１５号が提
案されている。Then, as the above-mentioned shield type magnetic head, JP-A-60
-145520 and JP-A-61-242315 have been proposed.
（発明が解決しようとする課題）
第９図（ａ−１）はノンシールド型磁気ヘッドの磁束密
度分布を示すグラフ、第９図（ａ−２）はノンシールド
型磁気ヘッドの記録密度と出力との関係を示すグラフで
あり、また第９図（ｂ−１）及び（ｂ−２）はヨーク型
磁気ヘッドの磁束密度分布を示すグラフ及び記録密度と
出力との関係を示すグラフであり、第９図（ｃ−１）及
び（ｃ −２）はシールド型磁気ヘッドの磁束密度分布
を示すグラフ及び記録密度と出力との関係を示すグラフ
である。グラフ（ａ−１）、（ｂ−１）、（Ｃ〜１）の
横軸には磁気抵抗素子１００の素子幅をとり、縦軸には
出力に最も効果のある素子幅方向の最大出力が得られた
時の信号磁界による磁束密度分布をとっている。(Problems to be Solved by the Invention) Figure 9 (a-1) is a graph showing the magnetic flux density distribution of a non-shielded magnetic head, and Figure 9 (a-2) is a graph showing the recording density and output of the non-shielded magnetic head. FIGS. 9(b-1) and (b-2) are graphs showing the magnetic flux density distribution of the yoke-type magnetic head and graphs showing the relationship between recording density and output, FIGS. 9(c-1) and (c-2) are graphs showing the magnetic flux density distribution of the shield type magnetic head and graphs showing the relationship between recording density and output. The horizontal axis of graphs (a-1), (b-1), and (C~1) shows the element width of the magnetoresistive element 100, and the vertical axis shows the maximum output in the element width direction, which has the most effect on the output. The magnetic flux density distribution due to the signal magnetic field at the time of acquisition is taken.
ノンシールド型の場合は第８図（ａ）に示すように媒体
１０２から磁気抵抗素子１００に入った磁束は後方に向
うにしたがって徐々に洩れて媒体１０２に戻るため、磁
束分布は磁気抵抗素子１００の先端（ｉ出端）で密で後
部で０となる。したがって、記録波長が長い場合には磁
束は磁気抵抗素子の後部まで作用するため出力は高いが
、垂直磁気記録には短波長を用い、この短波長の場合に
は磁束は磁気抵抗素子の先端のみに作用するため出力が
低下し分解能が落ちることとなる。In the case of a non-shielded type, as shown in FIG. 8(a), the magnetic flux that enters the magnetoresistive element 100 from the medium 102 gradually leaks backward and returns to the medium 102, so that the magnetic flux distribution is similar to that of the magnetoresistive element 100. It is dense at the tip (i-output end) and zero at the rear. Therefore, when the recording wavelength is long, the magnetic flux acts all the way to the rear of the magnetoresistive element, resulting in a high output, but for perpendicular magnetic recording, a short wavelength is used, and in the case of this short wavelength, the magnetic flux only reaches the tip of the magnetoresistive element. As a result, the output decreases and the resolution decreases.
またヨーク型の場合はギャップを挟んだヨークの磁位差
により流れる磁束の一部が磁気抵抗素子を磁化させる構
造のため、記録波長がギャップとほぼ同等となる時には
出力はなくなり、ギャップにより規制される分解能しか
得られない。In addition, in the case of a yoke type, part of the magnetic flux flowing due to the magnetic potential difference between the yokes with a gap magnetizes the magnetoresistive element, so when the recording wavelength becomes almost equal to the gap, there is no output, and the output is regulated by the gap. Only the resolution that can be obtained is obtained.
一方シールド型にあっては、記録波長が長波長の場合に
は磁気抵抗素子１００とシールド層１０４の両方に媒体
１０２からの磁束が流れ込むので先端部においては同方
向に磁化し出力は抑えられるが、垂直磁化記録に用いる
短波長の場合には磁気抵抗素子とシールド層が反対方向
にされ、媒体からの磁束が効率よく流れるため出力が向
上し分解能が高くなる。On the other hand, in the shield type, when the recording wavelength is long, the magnetic flux from the medium 102 flows into both the magnetoresistive element 100 and the shield layer 104, so the tips are magnetized in the same direction and the output is suppressed. In the case of a short wavelength used for perpendicular magnetization recording, the magnetoresistive element and the shield layer are placed in opposite directions, and the magnetic flux from the medium flows efficiently, resulting in improved output and resolution.
したがって、シールド型の磁気抵抗型磁気ヘッドは分解
能において最も有利ということになるが、この磁気ヘッ
ドにおいてもシールド層の存在により出力が抑えられ十
分なＳ／Ｎが得られないという問題がある。Therefore, a shielded magnetoresistive magnetic head is most advantageous in terms of resolution, but this magnetic head also has the problem that the presence of the shield layer suppresses the output and makes it impossible to obtain a sufficient S/N ratio.
（課題を解決するための手段）
」１記課題を解決すへく本発明は、磁気抵抗素子の片側
又は両側に非磁性材を介して軟磁性材からなるシールド
層を対向させたシールド型の磁気抵抗効果型磁気ヘッド
のシールド層の例えば後部を磁気抵抗素子に接触させる
か近接させるようにした。(Means for Solving the Problems) To solve the problem described in item 1, the present invention provides a shield-type shield layer in which a shield layer made of a soft magnetic material is opposed to one or both sides of a magnetoresistive element via a non-magnetic material. For example, the rear portion of the shield layer of the magnetoresistive magnetic head is brought into contact with or close to the magnetoresistive element.
（作用）
磁気抵抗素子は媒体との対向面に露出しているため、媒
体からの磁束が直接作用するため高感度で、更にシール
ド層の一部を磁気抵抗素子に接触させるか近接させるこ
とで高密度記録においても高い出力が得られる。(Function) Since the magnetoresistive element is exposed on the surface facing the medium, the magnetic flux from the medium acts directly on it, resulting in high sensitivity. High output can be obtained even in high-density recording.
（実施例） 以下に本発明の実施例を添付図面に基いて説明する。(Example) Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図は本発明に係る磁気抵抗効果型磁気ヘッドの断面
図であり、磁気抵抗効果型磁気ヘッド１はＮｉ−Ｆｅ膜
やＮｉ−Ｃｏ膜等の磁性薄膜からなる磁気抵抗素子２の
先端を磁気記録媒体１０との対向面に露出させ、磁気抵
抗素子２の両側に非磁性絶縁層３．３を介して軟磁性材
料からなるシールド層４．４を形成し、一方のシールド
層４の外側を非磁性基板５とし、他方のシールド層４の
外側を保護膜６（保護基板）としている。FIG. 1 is a sectional view of a magnetoresistive magnetic head according to the present invention, in which a magnetoresistive head 1 has a tip end of a magnetoresistive element 2 made of a magnetic thin film such as a Ni-Fe film or a Ni-Co film. A shield layer 4.4 made of a soft magnetic material is formed on both sides of the magnetoresistive element 2 via a non-magnetic insulating layer 3.3, and is exposed on the surface facing the magnetic recording medium 10. is used as a non-magnetic substrate 5, and the outside of the other shield layer 4 is used as a protective film 6 (protective substrate).
そして、前記シールド層４．４は媒体対向面から離れた
磁気抵抗素子２の後方部分において、磁気抵抗素子２に
近接している。The shield layer 4.4 is close to the magnetoresistive element 2 at the rear portion of the magnetoresistive element 2 away from the medium facing surface.
第２図に示す別実施例にあっては、磁気抵抗素子２の後
方部分においてシールド層４，４を磁気抵抗素子２に接
触せしめ、第３図に示す実施例にあっては、磁気抵抗素
子２の中間部に対向する部分においてシールド層４と磁
気抵抗素子２との間隔を広くし、媒体１０との対向面及
び媒体１０との対向面から離れた磁気抵抗素子２の後方
部分においてシールド層４を磁気抵抗素子２に近接せし
め、更に第４図に示す実施例にあっては、磁気抵抗素子
２の中間部に対向する部分においてシールド層４と磁気
抵抗素子２との間隔を広くし、媒体１０との対向面にお
いてシールド層４を磁気抵抗素子２に近接せしめ、媒体
１０との対向面から離れた磁気抵抗素子２の後方部分に
おいてシールド層４を磁気抵抗素子２に接触せしめてい
る。In another embodiment shown in FIG. 2, the shield layers 4, 4 are brought into contact with the magnetoresistive element 2 at the rear part of the magnetoresistive element 2, and in the embodiment shown in FIG. The gap between the shield layer 4 and the magnetoresistive element 2 is widened in the part facing the middle part of the magnetoresistive element 2, and the shield layer 4 is widened in the rear part of the magnetoresistive element 2 away from the surface facing the medium 10 and the surface facing the medium 10. 4 close to the magnetoresistive element 2, and in the embodiment shown in FIG. The shield layer 4 is brought close to the magnetoresistive element 2 on the surface facing the medium 10, and the shield layer 4 is brought into contact with the magnetoresistive element 2 at the rear part of the magnetoresistive element 2 away from the surface facing the medium 10.
以上のごとき構成の磁気ヘッドの製作手順を第５図（ａ
）乃至（１）を参照して以下に説明する。The manufacturing procedure for the magnetic head with the above configuration is shown in Figure 5 (a).
) to (1) below.
尚、第２図乃至第４図に示した実施例は第１図に示した
実施例と製造方法については同様のため説明を省略する
。Note that the manufacturing method of the embodiment shown in FIGS. 2 to 4 is the same as that of the embodiment shown in FIG. 1, and therefore a description thereof will be omitted.
先ず第５図（ａ）に示すように非磁性基板５の媒体との
対向面となる部分にドライエツチング等の薄膜微細加工
技術や機械加工技術によって磁気抵抗素子よりも狭い幅
の切欠或いは溝５ａを形成し、次ニ同図（ｂ）に示すよ
うにスパッタリング等の薄膜形成技術によって軟磁性材
料からなるシールド層４を非磁性基板５上に形成し、同
図（ｅ）に示すようにシールド層４を覆うようにスパッ
タリング等によって非磁性絶縁材層３を形成し、同図（
ｄ）に示すように研磨して満５ａの部分にのみ非磁性絶
縁材層３を残し、更に同図（ｅ）に示すように再び非磁
性絶縁材層３を形成する。First, as shown in FIG. 5(a), a notch or groove 5a having a width narrower than that of the magnetoresistive element is formed in the portion of the nonmagnetic substrate 5 that will be the surface facing the medium using a thin film microfabrication technique such as dry etching or a machining technique. Next, as shown in Figure (b), a shield layer 4 made of a soft magnetic material is formed on the non-magnetic substrate 5 by a thin film forming technique such as sputtering, and as shown in Figure (e), a shield layer 4 is formed on the non-magnetic substrate 5. A non-magnetic insulating material layer 3 is formed by sputtering or the like so as to cover the layer 4, and as shown in FIG.
As shown in d), the non-magnetic insulating material layer 3 is polished to leave only the portion 5a, and then the non-magnetic insulating material layer 3 is formed again as shown in FIG. 4(e).
この後、同図（ｆ）に示すように磁気抵抗素子２どなる
磁気抵抗効果を有する磁性薄膜を形成し、これを所定形
状にパターンニングする。この後、図示しないリード線
を素子２の両端に形成する。Thereafter, as shown in FIG. 2F, a magnetic thin film having a magnetoresistive effect such as the magnetoresistive element 2 is formed and patterned into a predetermined shape. After this, lead wires (not shown) are formed at both ends of the element 2.
尚、同図（ｇ）は（ｆ）で形成した素子とリード線を」
二面より見た図であり、（ｇ）に示すように磁気抵抗素
子２には外部よりバイアス磁界が必要とならないように
トラック幅方向と略４５″方向に容易磁区が固定されて
いる。また磁気抵抗素子２の両側には（ｆ）で説明した
ようにリード線２ａが接続されている。In addition, the same figure (g) shows the element and lead wire formed in (f).
This is a diagram seen from two sides, and as shown in (g), the magnetic resistance element 2 has easy magnetic domains fixed in the track width direction and in the approximately 45'' direction so that an external bias magnetic field is not required. Lead wires 2a are connected to both sides of the magnetoresistive element 2 as described in (f).
本製法は説明を簡単にするため、バイアスが不要となる
方法により説明したが、他のバイアス方法、例えば電流
、永久磁石、交換結合、バーバーポール、シャント等信
のバイアス手段をとってもかまわない。その場合は本基
本構成図である第１図若しくは第２図乃至第４図中に他
バイアス手段が紐み込まれたものとなる。In order to simplify the explanation, this manufacturing method has been described using a method that does not require a bias, but other bias methods such as current, permanent magnet, exchange coupling, barber pole, shunt, etc., may be used. In that case, other bias means will be included in the basic configuration diagram of FIG. 1 or FIGS. 2 to 4.
次いで同図（ｈ）に示すように磁気抵抗素子２の表面に
前記同様の非磁性絶縁層３を形成し、更にリフトオフ用
のレジストマスク１１を介して同図（１）に示すように
非磁性絶縁層３を重ね、同図（ｊ）に示すようにレジス
トマスク１１を剥がした後、同図（ｋ）に示すように軟
磁性材料からなるシールド層４を形成し、このシールド
層４を同図（１）に示すように保護膜６で覆うことで目
的とする磁気抵抗効果型磁気ヘッド１を得る。Next, as shown in the figure (h), a non-magnetic insulating layer 3 similar to that described above is formed on the surface of the magnetoresistive element 2, and a non-magnetic insulating layer 3 is further formed as shown in the figure (1) through a resist mask 11 for lift-off. After overlapping the insulating layer 3 and peeling off the resist mask 11 as shown in FIG. 1(j), a shield layer 4 made of a soft magnetic material is formed as shown in FIG. By covering with a protective film 6 as shown in FIG. 1, the intended magnetoresistive magnetic head 1 is obtained.
尚、本発明に係る磁気抵抗効果型磁気ヘッドは垂直磁気
記録方式に用いるヘッドに限定されず、他の記録方式の
磁気ヘッドとしても用いることができるのは勿論である
。It should be noted that the magnetoresistive magnetic head according to the present invention is not limited to a head used in a perpendicular magnetic recording system, but can of course be used as a magnetic head for other recording systems.
（効果）
第６図は本発明に係る磁気抵抗効果型磁気ヘッドと従来
のシールド型の磁気抵抗効果型磁気ヘッドの磁束分布を
比較したグラフ、第７図は本発明に係る磁気抵抗効果型
磁気ヘッドと従来のシールド型の磁気抵抗効果型磁気ヘ
ッドの記録密度と出力との関係を比較したグラフであり
、それぞれ実線が本実施例による結果であり、点線が従
来例による結果である。これらのグラフからも明らがな
ように本発明によれば、シールド層の例えば後部を磁気
抵抗素子に接触させるようにすることで、高密度記録に
おいても高い出力を維持できる磁気抵抗効果型磁気ヘッ
ドが得られる。(Effects) FIG. 6 is a graph comparing the magnetic flux distribution of the magnetoresistive magnetic head according to the present invention and a conventional shield type magnetoresistive magnetic head, and FIG. 7 is a graph comparing the magnetic flux distribution of the magnetoresistive magnetic head according to the present invention. This is a graph comparing the relationship between recording density and output between a head and a conventional shielded magnetoresistive magnetic head, in which the solid line is the result of this embodiment, and the dotted line is the result of the conventional example. As is clear from these graphs, according to the present invention, by bringing the rear part of the shield layer into contact with the magnetoresistive element, a magnetoresistive effect type magnet that can maintain high output even during high-density recording can be achieved. You will get the head.
第１図は本発明に係る磁気抵抗効果型磁気ヘッドの断面
図、第２図乃至第４図は別実施例に係る磁気抵抗効果型
磁気ヘッドの断面図、第５図（ａ）乃至（１）は本発明
に係る磁気抵抗効果型磁気ヘッドの製作方法を示す図、
第６図は本発明に係る磁気抵抗効果型磁気ヘッドと従来
のシールド型の磁気抵抗効果型磁気ヘッドの磁束密度分
布を比較したグラフ、第７図は本発明に係る磁気抵抗効
果型磁気ヘッドと従来のシールド型の磁気抵抗効果型磁
気ヘッドの記録密度と出力との関係を比較したグラフ、
第８図（ａ）乃至（Ｃ）は従来の磁気抵抗効果型磁気ヘ
ッドの断面図、第９図（ａ −１）、（ａ−２）、（ｂ
−１）、（ｂ−２）、（ｃ −１）及び（ｃ−２）は従
来の磁気抵抗効果型磁気ヘッドの磁束密度分布を示すグ
ラフ及び記録密度と出力との関係を示すグラフである。
１・・・磁気抵抗効果型磁気ヘッド、２・・・磁気抵抗
素子、３・・・非磁性絶縁材層、４・・・シールド層。
特 許 出 願 人 日本ビクター株式会社代 理
人 弁理士 下 １）容 一部間 弁理士 小
山 ｎ
１・・・磁気抵抗効果型磁気ヘッド
２・・・磁気抵抗素子
３・・・非磁性絶縁材層
４・・・シールド層
１’Ｃ
第４図
第７図
り
平成 ３年 ５月 ８日FIG. 1 is a cross-sectional view of a magnetoresistive magnetic head according to the present invention, FIGS. 2 to 4 are cross-sectional views of a magnetoresistive magnetic head according to another embodiment, and FIGS. ) is a diagram showing a method of manufacturing a magnetoresistive magnetic head according to the present invention,
FIG. 6 is a graph comparing the magnetic flux density distribution of the magnetoresistive magnetic head according to the present invention and a conventional shield type magnetoresistive magnetic head, and FIG. 7 is a graph comparing the magnetic flux density distribution of the magnetoresistive magnetic head according to the present invention and A graph comparing the relationship between recording density and output of conventional shielded magnetoresistive magnetic heads.
FIGS. 8(a) to (C) are cross-sectional views of conventional magnetoresistive magnetic heads, and FIGS. 9(a-1), (a-2), (b)
-1), (b-2), (c -1) and (c-2) are graphs showing the magnetic flux density distribution of conventional magnetoresistive magnetic heads and graphs showing the relationship between recording density and output. . DESCRIPTION OF SYMBOLS 1... Magnetoresistive magnetic head, 2... Magnetoresistive element, 3... Nonmagnetic insulating material layer, 4... Shield layer. Patent applicant: Japan Victor Co., Ltd. Agent
Person Patent attorney 2 1) Part 1 Patent attorney Koyama n 1... Magnetoresistive magnetic head 2... Magnetoresistive element 3... Nonmagnetic insulating material layer 4... Shield layer 1'C Figure 4 Figure 7 Map May 8, 1991
Claims (3)
軟磁性材からなるシールド層を対向させたシールド型の
磁気抵抗効果型磁気ヘッドにおいて、前記シールド層の
一部を磁気抵抗素子に接触させるか近接させたことを特
徴とする磁気抵抗効果型磁気ヘッド。(1) In a shield type magnetoresistive magnetic head in which a shield layer made of a soft magnetic material is opposed to one or both sides of a magnetoresistive element through a non-magnetic material, a part of the shield layer is attached to the magnetoresistive element. A magnetoresistive magnetic head characterized by being in contact with or in close proximity to each other.
素子の後方部分において、磁気抵抗素子に接触させるか
近接させたことを特徴とする請求項１に記載の磁気抵抗
効果型磁気ヘッド。(2) The magnetoresistive magnetic head according to claim 1, wherein the shield layer is brought into contact with or close to the magnetoresistive element at a rear portion of the magnetoresistive element away from the medium facing surface.
る部分において磁気抵抗素子との間隔を広くし、媒体対
向面において磁気抵抗素子に近接し、更に媒体対向面か
ら離れた磁気抵抗素子の後方部分において磁気抵抗素子
に接触させるか近接させたことを特徴とする請求項１に
記載の磁気抵抗効果型磁気ヘッド。(3) The shield layer widens the distance from the magnetoresistive element in the part facing the middle part of the magnetoresistive element, and the part of the magnetoresistive element that is close to the magnetoresistive element on the medium facing surface and further away from the medium facing surface. 2. The magnetoresistive magnetic head according to claim 1, wherein the rear portion is in contact with or in close proximity to a magnetoresistive element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32718990A JPH04195812A (en) | 1990-11-27 | 1990-11-27 | Magnetic resistance effect type magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP32718990A JPH04195812A (en) | 1990-11-27 | 1990-11-27 | Magnetic resistance effect type magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04195812A true JPH04195812A (en) | 1992-07-15 |
Family
ID=18196308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP32718990A Pending JPH04195812A (en) | 1990-11-27 | 1990-11-27 | Magnetic resistance effect type magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04195812A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59227022A (en) * | 1983-06-08 | 1984-12-20 | Sanyo Electric Co Ltd | Magneto-resistance effect type magnetic head |
| JPS61258322A (en) * | 1985-05-10 | 1986-11-15 | Nec Corp | Magneto-resistance effect head |
-
1990
- 1990-11-27 JP JP32718990A patent/JPH04195812A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59227022A (en) * | 1983-06-08 | 1984-12-20 | Sanyo Electric Co Ltd | Magneto-resistance effect type magnetic head |
| JPS61258322A (en) * | 1985-05-10 | 1986-11-15 | Nec Corp | Magneto-resistance effect head |
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