JPH0261812A - Thin film magnetic head - Google Patents
Thin film magnetic headInfo
- Publication number
- JPH0261812A JPH0261812A JP21130688A JP21130688A JPH0261812A JP H0261812 A JPH0261812 A JP H0261812A JP 21130688 A JP21130688 A JP 21130688A JP 21130688 A JP21130688 A JP 21130688A JP H0261812 A JPH0261812 A JP H0261812A
- Authority
- JP
- Japan
- Prior art keywords
- layer
- thin film
- magnetic head
- shield plate
- coil conductor
- 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
- 239000010409 thin film Substances 0.000 title claims abstract description 15
- 239000004020 conductor Substances 0.000 claims abstract description 22
- 239000010408 film Substances 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000035699 permeability Effects 0.000 claims abstract description 4
- 239000000758 substrate Substances 0.000 claims abstract description 4
- 238000010030 laminating Methods 0.000 claims abstract 2
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000009413 insulation Methods 0.000 abstract 2
- 230000000694 effects Effects 0.000 description 4
- 230000004907 flux Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 229910000889 permalloy Inorganic materials 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
- G11B5/3109—Details
- G11B5/313—Disposition of layers
- G11B5/3143—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野コ
この発明は薄膜磁気ヘッドに関し、特にその外来雑音の
シールドに関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a thin film magnetic head, and particularly to shielding of external noise therein.
［従来の技術］
第３図は従来の薄膜磁気ヘッドを示す断面図であって、
図においてく１）は基板、（２）は絶縁層、〈３）は下
部磁性層、（４）はコイル導体層、（５）はギャップ層
、（６）は上部磁性層、（７）は保護膜層である。[Prior Art] FIG. 3 is a sectional view showing a conventional thin film magnetic head,
In the figure, 1) is the substrate, (2) is the insulating layer, (3) is the lower magnetic layer, (4) is the coil conductor layer, (5) is the gap layer, (6) is the upper magnetic layer, and (7) is the It is a protective film layer.
第４図は第３図のコイル導体層く４）を示す平面図で、
図において第３図と同一符号は同一部分を示し、（８）
、（９）はそれぞれ引出線である。Figure 4 is a plan view showing the coil conductor layer 4) in Figure 3.
In the figure, the same symbols as in Figure 3 indicate the same parts, (8)
, (9) are respective leader lines.
録音、再生における磁気ヘッドの動作はよく知られてい
るので、この発明に関（系のある部分に就いてだけ簡単
に説明する。磁気録音された磁気テープ（図示せず）の
平面は、第３図の左端の直線が示す研磨された平面に接
触しなから移動する。Since the operation of magnetic heads during recording and playback is well known, only certain parts of the system related to this invention will be briefly explained. Move without touching the polished plane indicated by the straight line at the left end of Figure 3.
この移動によって、録音された磁気テープからでた磁束
は、下部磁性層（３）に入り、第３図右方の下部磁性層
（３）と上部磁性Ｎ（６）との接合部を経て、上部磁性
層（６）を通り磁気テープに帰る。磁気テープの移動に
つれて下部磁性層（３）および」二部磁性層（６）を通
る磁束の大きさが変化し、従ってコイル導体層（４）に
電圧が誘起される。この電圧を引出線（８）、（９）か
ら取り出して増幅し、磁気テープに録音されている情報
を再生している。Due to this movement, the magnetic flux emitted from the recorded magnetic tape enters the lower magnetic layer (3), passes through the junction between the lower magnetic layer (3) and the upper magnetic N (6) on the right side of FIG. It passes through the upper magnetic layer (6) and returns to the magnetic tape. As the magnetic tape moves, the magnitude of the magnetic flux passing through the bottom magnetic layer (3) and the two-part magnetic layer (6) changes, thus inducing a voltage in the coil conductor layer (4). This voltage is taken out from the lead wires (8) and (9) and amplified to reproduce the information recorded on the magnetic tape.
［発明が解決しようとする課題］
上記のような従来の薄膜磁気ヘッドは以上のように構成
されているので、コイル導体層（４）が外部雑音に対し
てシールドされておらず、外部雑音をピックアップして
Ｓ／Ｎ比が低下する。特に薄膜磁気ヘッドは薄膜化構造
のために磁気テープから再生される信号電圧は微小であ
り、外部雑音の影響は無視できないという問題点があっ
た。[Problems to be Solved by the Invention] Since the conventional thin-film magnetic head as described above is configured as described above, the coil conductor layer (4) is not shielded from external noise and is not shielded from external noise. The signal is picked up and the S/N ratio decreases. In particular, because of the thin film structure of thin film magnetic heads, the signal voltage reproduced from the magnetic tape is very small, and the influence of external noise cannot be ignored.
この発明は従来のものにおける上述の課題を解決するた
めになされたもので、外部雑音の影響を受けることの少
ない薄膜磁気ヘッドを得ることを目的としている。The present invention has been made to solve the above-mentioned problems in the prior art, and aims to provide a thin film magnetic head that is less affected by external noise.
［課題を解決するための手段〕
この発明では薄膜磁気ヘッドの絶縁層と保護膜層の中に
それぞれシールド板層を入れて、この２つのシールド板
層によってコイル導体層の上下をカバーして外部雑音を
シールドすることとし、シールド板層の材料には高導磁
率材料または導電材料を用いることとした。[Means for Solving the Problems] In the present invention, a shield plate layer is inserted into each of the insulating layer and the protective film layer of the thin-film magnetic head, and these two shield plate layers cover the top and bottom of the coil conductor layer, and the external In order to shield noise, we decided to use a high magnetic permeability material or a conductive material for the material of the shield plate layer.
［作用］
薄膜磁気ヘッドのコイル導体層に対する外来雑音の影響
は、コイル導体層をカバーするような形状に設けられた
シールド板層によりシールドされることとなる。[Operation] The influence of external noise on the coil conductor layer of the thin film magnetic head is shielded by a shield plate layer provided in a shape that covers the coil conductor layer.
［実施例コ
以下、この発明の実施例を図面を用いて説明する。第１
図はこの発明の一実施例を示す断面図で、図において第
３図と同一符号は同一または相当部分を示し、く１１）
は絶縁層（２）の内部に設けられたシールド板層、（１
２）は保護膜層（７）の内部に設けられたシールド板層
である。、シールド板層（１１）、（１２）はパーマロ
イ等の導電性高導磁率材料または銅などの導電材料によ
り構成され、コイル導体層（４）をカバーするように配
置されており、接地電位に接続（図示せず）されている
。[Embodiments] Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1st
The figure is a sectional view showing an embodiment of the present invention, and the same reference numerals as in FIG. 3 indicate the same or corresponding parts.
is a shield plate layer provided inside the insulating layer (2), (1
2) is a shield plate layer provided inside the protective film layer (7). , the shield plate layers (11) and (12) are made of a conductive material with high magnetic permeability such as permalloy or a conductive material such as copper, and are arranged to cover the coil conductor layer (4), and are connected to the ground potential. (not shown).
第２図は第１図のコイル導体層（４）を示ず平面図であ
って、第１図、第３図と同一符号は同一または相当部分
を示す。第１図及び第２図に示す通り、コイル導体層（
４）のコイルは、シールド板層（１１＞、（１２＞によ
りシールドされており、外部雑音の侵入を防止するよう
になっている。FIG. 2 is a plan view without showing the coil conductor layer (4) of FIG. 1, and the same reference numerals as in FIGS. 1 and 3 indicate the same or corresponding parts. As shown in Figures 1 and 2, the coil conductor layer (
The coil 4) is shielded by shield plate layers (11> and (12>) to prevent external noise from entering.
なお、シールド板層（１１）及び（１２）を図面の右の
部分で接続することにより（第１図及び第２図では省略
しである）、シールド効果をより向上させることが可能
となる。またシールド板層（１１）′、’（１２）のう
ちの何れが一方を省略することとしても、相当のシール
ド効果を期待することができる。Note that by connecting the shield plate layers (11) and (12) at the right side of the drawing (not shown in FIGS. 1 and 2), it is possible to further improve the shielding effect. Further, even if one of the shield plate layers (11)' and '(12) is omitted, a considerable shielding effect can be expected.
［発明の効果］
以上のようにこの発明によれば、薄膜磁気ヘッド内にシ
ールド板層を内蔵しているので、従来の磁気ヘッドのよ
うに磁気ヘッドの周辺にシールド板を配置する必要がな
くなるという効果がある。[Effects of the Invention] As described above, according to the present invention, since the shield plate layer is built into the thin-film magnetic head, there is no need to arrange a shield plate around the magnetic head as in conventional magnetic heads. There is an effect.
第１図はこの発明の一実施例を示す断面図、第２図は第
１図のコイル導体層を示す平面図、第３図は従来の薄膜
磁気ヘッドを示す断面図、第４図は第３図のコイル導体
層を示す平面図。
（１）は基板、（２）は絶縁層、（３）は下部磁性層、
（４）はコイル導体層、（５）はギャップ層、（６）は
上部磁性層、（７）は保護膜層、（１１）、（１２＞は
それぞれシールド板層。
なお、各図中同一符号は同一または相当部分を示すもの
とする。FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a plan view showing the coil conductor layer of FIG. 1, FIG. 3 is a sectional view showing a conventional thin film magnetic head, and FIG. FIG. 4 is a plan view showing the coil conductor layer in FIG. 3; (1) is the substrate, (2) is the insulating layer, (3) is the lower magnetic layer,
(4) is a coil conductor layer, (5) is a gap layer, (6) is an upper magnetic layer, (7) is a protective film layer, (11) and (12> are each a shield plate layer. Note that each figure is the same Codes indicate the same or equivalent parts.
Claims (1)
層、上部磁性層、保護膜層を上記それぞれの順序に積層
して構成される薄膜磁気ヘッドにおいて、 上記絶縁層内及び上記保護膜層内にそれぞれ高導磁率材
料または導電性材料により形成したシールド板層を備え
、これらのシールド板層により上記コイル導体層内に形
成されたコイル導体をカバーすることを特徴とする薄膜
磁気ヘッド。[Scope of Claims] A thin film magnetic head configured by laminating an insulating layer, a lower magnetic layer, a gap layer, a coil conductor layer, an upper magnetic layer, and a protective film layer in the above-mentioned order on a substrate, wherein the insulating layer A shield plate layer formed of a high magnetic permeability material or a conductive material is provided inside and in the above-mentioned protective film layer, respectively, and the coil conductor formed in the above-mentioned coil conductor layer is covered by these shield plate layers. Thin film magnetic head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21130688A JPH0261812A (en) | 1988-08-25 | 1988-08-25 | Thin film magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21130688A JPH0261812A (en) | 1988-08-25 | 1988-08-25 | Thin film magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0261812A true JPH0261812A (en) | 1990-03-01 |
Family
ID=16603760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21130688A Pending JPH0261812A (en) | 1988-08-25 | 1988-08-25 | Thin film magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0261812A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0420606U (en) * | 1990-06-13 | 1992-02-20 | ||
| WO1998011540A1 (en) * | 1996-09-10 | 1998-03-19 | Ampex Corporation | Magnetic core with field confinement structure |
| US6650510B2 (en) * | 2000-11-28 | 2003-11-18 | Samsung Electronics Co., Ltd. | Magnetic head with poles of inductive head above mr head and magnetic shield above inductive head |
-
1988
- 1988-08-25 JP JP21130688A patent/JPH0261812A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0420606U (en) * | 1990-06-13 | 1992-02-20 | ||
| WO1998011540A1 (en) * | 1996-09-10 | 1998-03-19 | Ampex Corporation | Magnetic core with field confinement structure |
| US6650510B2 (en) * | 2000-11-28 | 2003-11-18 | Samsung Electronics Co., Ltd. | Magnetic head with poles of inductive head above mr head and magnetic shield above inductive head |
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