JPH0467683B2 - - Google Patents
Info
- Publication number
- JPH0467683B2 JPH0467683B2 JP59263244A JP26324484A JPH0467683B2 JP H0467683 B2 JPH0467683 B2 JP H0467683B2 JP 59263244 A JP59263244 A JP 59263244A JP 26324484 A JP26324484 A JP 26324484A JP H0467683 B2 JPH0467683 B2 JP H0467683B2
- Authority
- JP
- Japan
- Prior art keywords
- coil
- layer
- magnetic
- circumferential conductor
- coil layer
- 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.)
- Expired - Lifetime
Links
- 230000005291 magnetic effect Effects 0.000 claims description 52
- 239000004020 conductor Substances 0.000 claims description 18
- 239000010409 thin film Substances 0.000 claims description 13
- 239000000758 substrate Substances 0.000 claims description 4
- 239000010410 layer Substances 0.000 description 41
- 239000011229 interlayer Substances 0.000 description 4
- 239000011241 protective layer Substances 0.000 description 3
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 229910021364 Al-Si alloy Inorganic materials 0.000 description 1
- 229910003271 Ni-Fe Inorganic materials 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000005415 magnetization Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- LIVNPJMFVYWSIS-UHFFFAOYSA-N silicon monoxide Inorganic materials [Si-]#[O+] LIVNPJMFVYWSIS-UHFFFAOYSA-N 0.000 description 1
- 238000007740 vapor deposition Methods 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
- G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
Description
【発明の詳細な説明】
産業上の利用分野
本発明は種々の磁気記録再生装置に用られる薄
膜磁気ヘツ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 thin film magnetic head used in various magnetic recording and reproducing devices.
従来の技術
巻線型の薄膜磁気ヘツドとしては、従来第１図
Ａ，Ｂに示されるものがあつた。この巻線型薄膜
磁気ヘツドは、非磁性基板１上に、上部磁性層２
及び下部磁性層３がコイル層４を挾んで被着され
ている。コイル層４は、層間絶縁層５によつて電
気的に絶縁される。最終的に外力から電磁変換部
を保護するための保護層６が形成されている。こ
のような構成では、媒体摺動面７に直交する軸８
に対して、上部及び下部磁性層２，３、及びコイ
ル層４は略対称に形成される。これにより上部及
び下部磁性層からなる磁気コアの磁路長を短くで
き、記録再生効率が向上する。またコイル巻数の
増加が可能で、低電流化、再生出力の増大が実現
できる。BACKGROUND OF THE INVENTION Conventional wire-wound thin film magnetic heads include those shown in FIGS. 1A and 1B. This wire-wound thin film magnetic head has an upper magnetic layer 2 on a non-magnetic substrate 1.
And a lower magnetic layer 3 is deposited with the coil layer 4 sandwiched therebetween. Coil layer 4 is electrically insulated by interlayer insulating layer 5 . Finally, a protective layer 6 is formed to protect the electromagnetic transducer from external forces. In such a configuration, the axis 8 perpendicular to the medium sliding surface 7
On the other hand, the upper and lower magnetic layers 2 and 3 and the coil layer 4 are formed approximately symmetrically. As a result, the magnetic path length of the magnetic core made up of the upper and lower magnetic layers can be shortened, and recording and reproducing efficiency can be improved. Furthermore, the number of turns of the coil can be increased, resulting in lower current and increased reproduction output.
発明が解決しようとする問題点
しかし、このような従来例の薄膜ヘツドを、２
チヤンネルきわめて接近させて並置するといつた
ニーズには、種々の問題があつた。すなわち、コ
イル層４の横への広がりのため近接配置ができ
ず、また無理に磁気コアを近接配置しても、磁路
長が長くなり効率のよい記録再生ができなかつ
た。このような問題を解決するには、コイル巻数
を減らすなど磁気回路全体の構成に留意せねばな
らないため、従来このような点を改善した薄膜磁
気ヘツドはなかつた。Problems to be Solved by the Invention However, such conventional thin film heads are
The need for very close juxtaposition of channels presented various problems. That is, because of the lateral spread of the coil layer 4, it was not possible to arrange the magnetic cores close to each other, and even if the magnetic cores were forced to be arranged close to each other, the magnetic path length became long and efficient recording and reproducing could not be performed. To solve this problem, it is necessary to pay attention to the overall structure of the magnetic circuit, such as by reducing the number of turns of the coil, so there has been no thin film magnetic head that has improved this problem.
本発明は、２チヤンネルの電磁変換部の記録媒
体摺動部を近接配置することができる薄膜磁気ヘ
ツドを提供することを目的とする。 SUMMARY OF THE INVENTION An object of the present invention is to provide a thin film magnetic head in which recording medium sliding parts of two-channel electromagnetic transducers can be arranged close to each other.
問題点を解決するための手段
本発明の薄膜磁気ヘツドは、一対のヘツド素子
のそれぞれの磁性層を媒体対向面に行くにしたが
つて互いに接近して行くように構成するととも
に、コイル層の媒体対向面側の部分とコイル中心
で挟まれた部分との間で前記磁性層と前記コイル
層が略直角に交差し、しかも２つのコイル層のコ
イル中心で挟まれた部分及びコイル層の媒体対向
面側の部分のそれぞれの外周部導体と内周部導体
との間隔を、コイル中心で挟まれた部分及び前記
媒体対向面側の部分以外でのコイル層の外周部導
体及び内周部導体との間隔よりも狭くした。Means for Solving the Problems In the thin film magnetic head of the present invention, the respective magnetic layers of a pair of head elements are constructed so that they approach each other as they go toward the medium facing surface, and the magnetic layers of the coil layer The magnetic layer and the coil layer intersect at a substantially right angle between the part on the opposing surface side and the part sandwiched between the coil centers, and the part sandwiched between the coil centers of the two coil layers and the coil layer face the medium. The distance between the outer circumferential conductor and the inner circumferential conductor of each of the surface side portions is determined by the distance between the outer circumferential conductor and the inner circumferential conductor of the coil layer other than the portion sandwiched between the coil centers and the portion on the medium facing surface side. narrower than the interval between.
作 用
このような構成により、２チヤンネルの高密度
配置、コイル巻数の増大、磁気コアの磁路長の短
縮が可能になり、記録再生効率を向上させる事が
できる。Function: With such a configuration, it is possible to arrange two channels at high density, increase the number of coil turns, shorten the magnetic path length of the magnetic core, and improve recording and reproducing efficiency.
実施例
本発明の一実施例を第２図および第３図を用い
て説明する。第２図は本実施例の薄膜磁気ヘツド
の平面図、第３はそのＡ−A′断面図である。Embodiment An embodiment of the present invention will be described with reference to FIGS. 2 and 3. FIG. 2 is a plan view of the thin film magnetic head of this embodiment, and FIG. 3 is a sectional view taken along line A-A'.
耐磨耗性に優れた基板１１上に、蒸着または電
着等によつて、Ni−Fe合金Fe−Al−Si合金等強
磁性体を被着し、リフトオフ等により所定形状に
加工し、下部磁性層１２を形成する。その上に、
ギヤツプ層１３をSiO2，Al2O3等耐磨耗性に優れ
た絶縁材で形成し、その上に、コイル層１４を電
気抵抗の低いAu，Cu，Al等で形成する。コイル
層１４は、上部及び下部磁性層１５，１２と層間
絶縁層１６によつて電気的に絶縁される。上部磁
性層１５は、下部磁性層１２と同様にして形成す
る。最終的には、電磁変換部を外力から保護する
為に、耐磨耗性に優れたSiO，SiO2，Al2O3等で
保護層１７を形成し、その上にカバー材１８を接
着する。 A ferromagnetic material such as a Ni-Fe alloy or Fe-Al-Si alloy is deposited on a substrate 11 having excellent wear resistance by vapor deposition or electrodeposition, and is processed into a predetermined shape by lift-off or the like. A magnetic layer 12 is formed. in addition,
The gap layer 13 is formed of an insulating material with excellent wear resistance, such as SiO 2 or Al 2 O 3 , and the coil layer 14 is formed thereon of Au, Cu, Al, or the like having low electrical resistance. Coil layer 14 is electrically insulated by upper and lower magnetic layers 15 and 12 and interlayer insulating layer 16. The upper magnetic layer 15 is formed in the same manner as the lower magnetic layer 12. Finally, in order to protect the electromagnetic transducer from external forces, a protective layer 17 is formed of SiO, SiO 2 , Al 2 O 3, etc., which have excellent wear resistance, and a cover material 18 is bonded thereon. .
以上のような構成の薄膜磁気ヘツドにおいて、
第２図に示す様に、コイルの中心から媒体摺動面
に対して平行に引かれた直線及び垂直に引かれた
直線と各コイルの導体と交叉する部分において、
各コイルの導体が上記直線と直行するようにす
る。またコイル中心と媒体摺動面１９のトラツク
間中心を結ぶ直線２３に交叉する部分において各
コイルの導体をこの直線２３を略直行させる。ま
たコイルの他方のコイル側及び媒体摺動面側及び
直線２３と直行するそれぞれの部分を他の部分よ
りもコイル幅及びコイル間距離を共に狭くする。
すなわち隣接方向２１に沿つて互いのコイル中心
を近づかせるとともにコイル中心を媒体摺動面方
向２２に移動させる事によつて、媒体摺動面とコ
イル中心の間隔を狭くする。さらに直線２３に略
沿つて上部及び下部磁性層１５，１２を設けた。
このような構成により、磁路長の短い２チヤンネ
ルヘツドを高密度配置でき、偏平化に伴う巻線の
増加もはかれる。また、上部及び下部磁性層から
なる磁気コアの近接対峙部では、隣接コイルから
距離が離れたため、低クロストークが得られる。 In the thin film magnetic head configured as above,
As shown in Fig. 2, at the portion where the conductor of each coil intersects a straight line drawn from the center of the coil parallel to the medium sliding surface and a straight line drawn perpendicularly to the medium sliding surface.
Make sure that the conductor of each coil is perpendicular to the above straight line. Further, the conductor of each coil is made to run approximately perpendicular to the straight line 23 at the portion where it intersects the straight line 23 connecting the center of the coil and the center between the tracks of the medium sliding surface 19. Further, the coil width and the distance between the coils are made narrower on the other coil side, on the medium sliding surface side, and on each portion perpendicular to the straight line 23 than the other portions.
That is, by moving the centers of the coils closer to each other along the adjacent direction 21 and moving the coil centers in the direction 22 of the medium sliding surface, the distance between the medium sliding surface and the coil center is narrowed. Furthermore, upper and lower magnetic layers 15 and 12 were provided approximately along the straight line 23.
With this configuration, two-channel heads with short magnetic path lengths can be arranged with high density, and the number of windings can be increased due to flattening. In addition, since the close facing portion of the magnetic core consisting of the upper and lower magnetic layers is separated from the adjacent coil, low crosstalk can be obtained.
ギヤツプデプスｄは、媒体摺動面１９から層間
絶縁層１６の媒体摺動面方向２２の最外端Ｂ−
B′面までの距離で規定される。媒体摺動面１９
とＢ−B′面は平行に配置することにより、ギヤ
ツプデプスｄの管理が容易になる。すなわち、コ
イル端面Ｃ−C′とギヤツプデプス後端面となるＢ
−B′面は、非平行な構成なつていることが特徴
である。またギヤツプ長ｇとコイル層挾持部の上
部及び下部磁性層１５，１２間の距離Ｈの関係
は、Ｈがｇの数10倍になるため、磁気コア途中で
の信号磁化の漏れが減少し、コア効率が向上す
る。 The gear depth d is defined as the distance from the medium sliding surface 19 to the outermost end B- of the interlayer insulating layer 16 in the direction 22 of the medium sliding surface.
It is defined by the distance to plane B′. Media sliding surface 19
By arranging the and B-B' planes in parallel, the gear depth d can be easily managed. In other words, the coil end face C-C′ and the rear end face of the gear depth B
The −B′ plane is characterized by a non-parallel configuration. In addition, the relationship between the gap length g and the distance H between the upper and lower magnetic layers 15 and 12 of the coil layer holding part is that H is several ten times g, so leakage of signal magnetization in the middle of the magnetic core is reduced. Improves core efficiency.
以上の様に本実施例によれば、２チヤンネル構
成で、コイルの形状に特徴をもたせることによつ
て高密度配置を可能にし、巻線の巻数を増大させ
る事ができるとともに磁路長の短い磁気コアを得
る事ができ、効率の良い記録再生が可能になる。
また磁気コアが最近接する部分は、隣接コイルか
ら離れる様になるために低クロストークが得られ
る。 As described above, according to this embodiment, the two-channel configuration allows high-density arrangement by giving characteristics to the shape of the coil, increasing the number of turns of the winding wire, and shortening the magnetic path length. A magnetic core can be obtained, allowing efficient recording and reproduction.
In addition, the portion where the magnetic core is closest is separated from the adjacent coil, resulting in low crosstalk.
発明の効果
本発明は、一対のヘツド素子のそれぞれの磁性
層を媒体対向面に行くにしたがつて互いに接近し
て行くように構成するとともに、コイル層の媒体
対向面側の部分とコイル中心で挟まれた部分との
間で前記磁性層と前記コイル層が略直角に交差
し、しかも２つのコイル層のコイル中心で挟まれ
た部分及びコイル層の媒体対向面側の部分のそれ
ぞれの外周部導体と内周部導体との間隔を、コイ
ル中心で挟まれた部分及び前記媒体対向面側の部
分以外でのコイル層の外周部導体及び内周部導体
との間隔よりも狭くした事により、磁路長の短い
磁気コアを得る事ができ、効率の良い記録再生が
可能になる。Effects of the Invention According to the present invention, the respective magnetic layers of a pair of head elements are configured to approach each other as they go toward the medium facing surface, and the portion of the coil layer on the medium facing surface side and the center of the coil The magnetic layer and the coil layer intersect at a substantially right angle between the sandwiched portions, and the outer periphery of the portion sandwiched between the coil centers of the two coil layers and the portion of the coil layer on the medium facing surface side. By making the distance between the conductor and the inner circumference conductor narrower than the distance between the outer circumference conductor and the inner circumference conductor of the coil layer in areas other than the portion sandwiched between the coil centers and the portion on the medium facing surface side, A magnetic core with a short magnetic path length can be obtained, allowing efficient recording and reproduction.
第１図Ａは、従来の薄膜磁気ヘツドの平面図、
同Ｂは同断面図、第２図は本発明の一実施例にお
ける薄膜磁気ヘツドの平面図、第３図は第２図の
Ａ−A′断面図である。
１１……基板、１２……下部磁性層、１５……
上部磁性層、１４……コイル、１６……層間絶縁
層、１７……保護層、１９……媒体摺動面、１３
……ギヤツプ層。
FIG. 1A is a plan view of a conventional thin film magnetic head.
2 is a plan view of a thin film magnetic head according to an embodiment of the present invention, and FIG. 3 is a sectional view taken along line A-A' in FIG. 11...Substrate, 12...Lower magnetic layer, 15...
Upper magnetic layer, 14... Coil, 16... Interlayer insulating layer, 17... Protective layer, 19... Medium sliding surface, 13
...Gap layer.
Claims (1)
されたコイル層を設けた一対のヘツド素子を基板
の上に形成した薄膜磁気ヘツドであつて、一対の
ヘツド素子のそれぞれの磁性層を媒体対向面に行
くにしたがつて互いに接近して行くように構成す
るとともに、前記コイル層の媒体対向面側の部分
とコイル中心で挟まれた部分との間で前記磁性層
と前記コイル層が略直角に交差し、しかも２つの
コイル層のコイル中心で挟まれた部分及び前記コ
イル層の媒体対向面側の部分のそれぞれの外周部
導体と内周部導体との間隔を、前記コイル中心で
挟まれた部分及び前記媒体対向面側の部分以外で
のコイル層の内周部導体と外周部導体との間隔よ
りも狭くした事を特徴とする薄膜磁気ヘツド。1 A thin-film magnetic head in which a pair of head elements each having a coil layer formed by spirally formed conductors between two magnetic layers is formed on a substrate, and each magnetic layer of the pair of head elements is The magnetic layer and the coil layer are configured to approach each other toward the medium facing surface, and the magnetic layer and the coil layer are arranged between a portion of the coil layer on the medium facing surface side and a portion sandwiched between the coil center. The distance between the outer circumferential conductor and the inner circumferential conductor of each of the portions of the two coil layers that intersect at approximately right angles and are sandwiched between the coil centers and the portion of the coil layer on the side facing the medium is set at the center of the coil. A thin film magnetic head characterized in that the distance between the inner circumferential conductor and the outer circumferential conductor of the coil layer is narrower than the distance between the inner circumferential conductor and the outer circumferential conductor of the coil layer other than the sandwiched portion and the portion on the medium facing surface side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26324484A JPS61142518A (en) | 1984-12-13 | 1984-12-13 | Thin film magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP26324484A JPS61142518A (en) | 1984-12-13 | 1984-12-13 | Thin film magnetic head |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61142518A JPS61142518A (en) | 1986-06-30 |
| JPH0467683B2 true JPH0467683B2 (en) | 1992-10-29 |
Family
ID=17386772
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP26324484A Granted JPS61142518A (en) | 1984-12-13 | 1984-12-13 | Thin film magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61142518A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6045915A (en) * | 1983-08-24 | 1985-03-12 | Canon Inc | Thin film magnetic head |
-
1984
- 1984-12-13 JP JP26324484A patent/JPS61142518A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6045915A (en) * | 1983-08-24 | 1985-03-12 | Canon Inc | Thin film magnetic head |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61142518A (en) | 1986-06-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |