JPH0432013A - Yoke type mr head - Google Patents
Yoke type mr headInfo
- Publication number
- JPH0432013A JPH0432013A JP13872590A JP13872590A JPH0432013A JP H0432013 A JPH0432013 A JP H0432013A JP 13872590 A JP13872590 A JP 13872590A JP 13872590 A JP13872590 A JP 13872590A JP H0432013 A JPH0432013 A JP H0432013A
- Authority
- JP
- Japan
- Prior art keywords
- yoke
- filler
- magnetic
- head
- characteristic
- 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 claims abstract description 31
- 239000000945 filler Substances 0.000 claims abstract description 15
- 230000035699 permeability Effects 0.000 claims abstract description 9
- 239000000696 magnetic material Substances 0.000 claims abstract description 7
- 230000004907 flux Effects 0.000 abstract description 10
- 238000012856 packing Methods 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 12
- 239000004020 conductor Substances 0.000 description 3
- 239000011810 insulating material Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000011241 protective layer Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- 239000004642 Polyimide Substances 0.000 description 1
- 229910000808 amorphous metal alloy Inorganic materials 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229920001721 polyimide Polymers 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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3906—Details related to the use of magnetic thin film layers or to their effects
- G11B5/3916—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide
- G11B5/3919—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path
- G11B5/3922—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure
- G11B5/3925—Arrangements in which the active read-out elements are coupled to the magnetic flux of the track by at least one magnetic thin film flux guide the guide being interposed in the flux path the read-out elements being disposed in magnetic shunt relative to at least two parts of the flux guide structure the two parts being thin films
-
- 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
- G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
- G11B5/39—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects
- G11B5/3903—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using magneto-resistive devices or effects using magnetic thin film layers or their effects, the films being part of integrated structures
- G11B5/3967—Composite structural arrangements of transducers, e.g. inductive write and magnetoresistive read
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (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、ＭＲ素子を用いた磁気ヘッドであるヨーク型
ＭＲ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 yoke-type MR head, which is a magnetic head using an MR element.
「従来の技術およびその課題」
周知のように、ＭＲ素子（磁気抵抗素子）は、磁界の強
弱を電気抵抗の変化として取り出すように構成された電
子部品であって、近年、これを用いた磁気ヘッドすなわ
ちＭＲヘッドが実用化されている。"Prior art and its problems" As is well known, an MR element (magnetoresistive element) is an electronic component configured to extract the strength of a magnetic field as a change in electrical resistance. MR heads have been put into practical use.
そのようなＭＲヘッドの一従来例を第２図に示す。これ
は、薄膜形成技術の応用により製作されたもので、先端
部がギャップ層１を介して積層された下部ヨーク２と上
部ヨーク３とでリング状の磁気回路を形成して、その内
側に絶縁材４で被包されたコイル導体５を配し、かつ、
上部ヨーク３に切欠部６を形成してその内側にＭＲ素子
７を装着した構成のものである。A conventional example of such an MR head is shown in FIG. This is manufactured by applying thin film formation technology, and a ring-shaped magnetic circuit is formed by a lower yoke 2 and an upper yoke 3, which are laminated with a gap layer 1 in between. A coil conductor 5 covered with a material 4 is disposed, and
This has a structure in which a notch 6 is formed in the upper yoke 3 and an MR element 7 is mounted inside the notch.
ところで、このようなヨーク型ＭＲヘッドは、再生時に
は大きな出力か得られるので再生へノドとしては優れて
いる反面、ＭＲ素子７の装着部に形成されている切欠部
６により上部ヨーク３が分断されているために、記録時
にはギャップに十分な磁界が得られず、このため、記録
用へ７ドとしては効率が悪く、オーバーライド特性が良
くないものであった。Incidentally, such a yoke-type MR head is excellent as a reproduction throat because it can obtain a large output during reproduction, but on the other hand, the upper yoke 3 is divided by the notch 6 formed in the mounting portion of the MR element 7. Because of this, a sufficient magnetic field could not be obtained in the gap during recording, and as a result, it was inefficient as a recording medium and had poor override characteristics.
本発明は上記の事情に鑑みてなされたもので、再生特性
のみならず、記録特性にも優れたＭＲへラドを提供する
ことを目的としている。The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an MR RAD that is excellent not only in reproduction characteristics but also in recording characteristics.
「課題を解決するだめの手段」
本発明は、上部ヨークと下部ヨークの先端部をギャップ
層を介して積層するとともに、前記上部ヨークに切欠部
を形成してその内側にＭＲ素子を装着した構成のヨーク
型ＭＲヘッドにおいて、前記切欠部に、前記ヨークより
も透磁率の小さい磁性材料からなる充填材を充填してな
ることを特徴としている。"Means for Solving the Problem" The present invention has a structure in which the tips of an upper yoke and a lower yoke are laminated with a gap layer interposed therebetween, and a notch is formed in the upper yoke, and an MR element is mounted inside the notch. In the yoke type MR head, the notch is filled with a filler made of a magnetic material having a lower magnetic permeability than the yoke.
「作用 」
本発明のＭＲヘッドでは、再生時にヨークに生じる磁束
が、ＭＲ素子と充填材の磁気抵抗比に応じて分割される
が、その場合においてもＭＲ素子を駆動するに十分な磁
界か得られ、従来の場合と同様に大きな再生出力が得ら
れる。また、記録時にはＭＲ素子は飽和してしまっては
とんとの磁束が充填材を通過することになり、したがっ
て、ギャップには十分な磁界か形成されてオーバーライ
ド特性が改善される。"Function" In the MR head of the present invention, the magnetic flux generated in the yoke during reproduction is divided according to the magnetoresistance ratio between the MR element and the filler, but even in that case, a magnetic field sufficient to drive the MR element can be obtained. As in the conventional case, a large playback output can be obtained. Furthermore, when the MR element is saturated during recording, a large amount of magnetic flux passes through the filler, and therefore a sufficient magnetic field is formed in the gap, improving the override characteristic.
「実施例」
以下、本発明に係るＭＲへ・ラドの一実施例を第１図を
参照して説明する。"Embodiment" Hereinafter, an embodiment of the MR/RAD according to the present invention will be described with reference to FIG.
本実施例のＭＲヘッドは薄膜形成技術の応用により製作
されたもので、基板１０の表面に、絶縁層１１．下部ヨ
ーク１２、ギャップ層１３、絶縁材１４で被包されたコ
イル導体１５、上部ヨーク１６、保護層１７を順次積層
してなるものであって、下部ヨーク１２と上部ヨーク１
６の先端部をギャップ層１３を介して重ね合わせること
でギャップを形成したものとなっている。The MR head of this example was manufactured by applying thin film formation technology, and an insulating layer 11. A lower yoke 12, a gap layer 13, a coil conductor 15 covered with an insulating material 14, an upper yoke 16, and a protective layer 17 are sequentially laminated, and the lower yoke 12 and the upper yoke 1
A gap is formed by overlapping the tips of 6 with a gap layer 13 interposed therebetween.
上記の基板１０としてはたとえばＡ Ｉ２ｏ 、−Ｔｉ
Ｃ等のセラミックが用いられ、絶縁層１１ ギャップ層
１３、保護層１７としては！二とえばＡｌ２Ｏ３，５１
０２等の酸化物からなる非磁性材料が用いられ、絶縁材
１４としてはポリイミド、レジスト、Ｓ ＋ ０２、Ａ
＋ ｚ Ｏｓ等の材料が用いられている。また、下部ヨ
ーク１２および上部ヨーク１６としては、たとえはパー
マロイ等の強磁性材料が用いられ、それらの透磁率の値
はＣＧＳ単位系において１ 、ｏ ｏ ｏ〜３，０００
程度とされている。Examples of the above substrate 10 include A I2o, -Ti
Ceramics such as C are used for the insulating layer 11, gap layer 13, and protective layer 17! 2 For example Al2O3,51
A non-magnetic material made of oxide such as 02 is used, and the insulating material 14 is made of polyimide, resist, S + 02, A
Materials such as + z Os are used. Further, as the lower yoke 12 and the upper yoke 16, a ferromagnetic material such as permalloy is used, and their magnetic permeability values range from 1, o o o to 3,000 in the CGS unit system.
It is said that the degree of
そして、上部ヨーク１６には切欠部１８が形成されてい
て、その内側に絶縁層１９を介してＭＲ素子２０が装着
され、さらに、上記の切欠部１８には充填材２１が充填
されている。上記ＭＲ素子２０はその厚みが２００〜５
００人程度とされ、その透磁率の値がヨーク１２．１６
と同等の１，０００〜３０００程度とされている。また
、上記充填材２１としては、ヨーク１２．１６よりも透
磁率の小さい磁性材料、たとえばＣＯ系アモルファス合
金等、が用いられて、その透磁率の値は数十〜数百程度
（たとえは１０〜８００程度）とされ、かつ、飽和磁束
密度Ｂｓの値がヨーク１２．１６と同程度かそれより大
きいものとされている。なお、上記の絶縁層１９の厚み
は数百〜数千人程度である。A cutout 18 is formed in the upper yoke 16, and an MR element 20 is mounted inside the cutout 18 with an insulating layer 19 interposed therebetween.Furthermore, the cutout 18 is filled with a filler 21. The MR element 20 has a thickness of 200 to 5
00 people, and its magnetic permeability value is 12.16
It is said to be about 1,000 to 3,000, which is equivalent to . Further, as the filler 21, a magnetic material having a lower magnetic permeability than that of the yoke 12.16, such as a CO-based amorphous alloy, is used, and the value of the magnetic permeability is on the order of tens to hundreds (for example, 10 ~800), and the value of the saturation magnetic flux density Bs is about the same as or larger than that of the yoke 12.16. Note that the thickness of the insulating layer 19 is approximately several hundred to several thousand.
上記構成のＭＲへラドにおいては、再生時にヨーク１２
．１６に生じる磁束が、ＭＲ素子２０と充填材２１の磁
気抵抗比に応じて分割されることになるが、その場合に
おいてもＭＲ素子２０を駆動するに十分な磁界が得られ
、したがって、従来のＭＲヘッドと同様に大きな再生出
力が得られる。In the MR head with the above configuration, the yoke 12 is
．． The magnetic flux generated in the MR element 16 is divided according to the magnetic resistance ratio of the MR element 20 and the filler 21, but even in that case, a magnetic field sufficient to drive the MR element 20 can be obtained. Similar to the MR head, a large reproduction output can be obtained.
一方、記録時にはＭＲ素子２０は飽和してしまってほと
んどの磁束は充填材２１を通過することになるので、ギ
ャップには十分な磁界が形成され、その結果、上部ヨー
クが切欠部により分断されている従来のＭＲヘッドに比
してオーバーライド特性を大きく改善できるものである
。On the other hand, during recording, the MR element 20 is saturated and most of the magnetic flux passes through the filler 21, so a sufficient magnetic field is formed in the gap, and as a result, the upper yoke is divided by the notch. The override characteristics can be greatly improved compared to conventional MR heads.
「発明の効果」
以上で詳細に説明したように、本発明のＭＲヘッドは、
ＭＲ素子の装着部に形成した上部ヨークの切欠部を、ヨ
ークよりも透磁率の小さい磁性材料からなる充填材によ
り充填した構成であるから、再生時にヨークに生じる磁
束がＭＲ素子と充填材の磁気抵抗比に応じて分割され、
これによって再生時においてはＭＲ素子を駆動するに十
分な磁界が得られることは勿論のこと、記録時にはほと
んどの磁束は充填材を通過することになってギャップに
は十分な磁界が形成され、その結果、オーバーライド特
性を大きく改善できるものであり、したがって、再生特
性のみならず記録特性にも優れる、という利点がある。"Effects of the Invention" As explained in detail above, the MR head of the present invention has the following features:
Since the notch of the upper yoke formed at the mounting part of the MR element is filled with a filler made of a magnetic material having a lower magnetic permeability than the yoke, the magnetic flux generated in the yoke during reproduction is transferred to the magnetic flux of the MR element and the filler. divided according to resistance ratio,
This not only provides a magnetic field sufficient to drive the MR element during playback, but also allows most of the magnetic flux to pass through the filler during recording, creating a sufficient magnetic field in the gap. As a result, the override characteristics can be greatly improved, and therefore, there is an advantage that not only the reproduction characteristics but also the recording characteristics are excellent.
第１図は本発明に係るＭＲヘッドの一実施例を示す要部
概略構成図、第２図は従来のＭＲへノドの一例を示す概
略構成図である。
０・・・・・・基板、１１・・・・・絶縁層、２・・・
・・・下部ヨーク、１３・・・・・・ギャップ層、４・
・・・・・絶縁材、１５・・・・・・コイル導体、６・
・・・・・上部ヨーク、１７・・・・・・保護層、８・
・・・・・切欠部、１９・・・・・絶縁層、０・・・・
・・ＭＲ素子、２１・・・・・充填材。
出願人 アルプス電気株式会社
代表者 片 岡 政 隆
＄１図
第２図FIG. 1 is a schematic diagram showing the main parts of an embodiment of an MR head according to the present invention, and FIG. 2 is a schematic diagram showing an example of a conventional MR head. 0...Substrate, 11...Insulating layer, 2...
... Lower yoke, 13 ... Gap layer, 4.
... Insulating material, 15 ... Coil conductor, 6.
... Upper yoke, 17 ... Protective layer, 8.
...Notch, 19...Insulating layer, 0...
...MR element, 21...Filling material. Applicant Alps Electric Co., Ltd. Representative Masataka Kataoka $1 Figure 2
Claims (1)
積層するとともに、前記上部ヨークに切欠部を形成して
その内側にＭＲ素子を装着した構成のヨーク型ＭＲヘッ
ドにおいて、前記切欠部に、前記ヨークよりも透磁率の
小さい磁性材料からなる充填材を充填してなることを特
徴とするヨーク型ＭＲヘッド。In a yoke-type MR head having a structure in which the tips of an upper yoke and a lower yoke are stacked with a gap layer interposed therebetween, a notch is formed in the upper yoke, and an MR element is mounted inside the notch, the notch includes the A yoke-type MR head characterized by being filled with a filler made of a magnetic material having a lower magnetic permeability than the yoke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13872590A JPH0432013A (en) | 1990-05-29 | 1990-05-29 | Yoke type mr head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13872590A JPH0432013A (en) | 1990-05-29 | 1990-05-29 | Yoke type mr head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0432013A true JPH0432013A (en) | 1992-02-04 |
Family
ID=15228697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13872590A Pending JPH0432013A (en) | 1990-05-29 | 1990-05-29 | Yoke type mr head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0432013A (en) |
-
1990
- 1990-05-29 JP JP13872590A patent/JPH0432013A/en active Pending
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