JPH0283808A - Thin-film magnetic head - Google Patents
Thin-film magnetic headInfo
- Publication number
- JPH0283808A JPH0283808A JP23702788A JP23702788A JPH0283808A JP H0283808 A JPH0283808 A JP H0283808A JP 23702788 A JP23702788 A JP 23702788A JP 23702788 A JP23702788 A JP 23702788A JP H0283808 A JPH0283808 A JP H0283808A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- magnetic pole
- film
- substrate
- coil
- 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 16
- 239000010408 film Substances 0.000 claims abstract description 35
- 239000000758 substrate Substances 0.000 claims abstract description 23
- 230000001681 protective effect Effects 0.000 claims abstract description 14
- 239000002184 metal Substances 0.000 claims description 10
- 230000006698 induction Effects 0.000 abstract 1
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000004544 sputter deposition Methods 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
- G11B5/3103—Structure or manufacture of integrated heads or heads mechanically assembled and electrically connected to a support or housing
- G11B5/3106—Structure or manufacture of integrated heads or heads mechanically assembled and electrically connected to a support or housing where the integrated or assembled structure comprises means for conditioning against physical detrimental influence, e.g. wear, contamination
-
- 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
- G11B5/10—Structure or manufacture of housings or shields for heads
- G11B5/11—Shielding of head against electric or magnetic fields
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は薄膜磁気ヘッドに関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a thin film magnetic head.
［従来の技術］
従来の薄膜磁気ヘッドは、第３図、第４図に示すように
、非磁性基板２の上に絶縁膜７を介して金属磁性膜で作
られた上部磁極３と下部磁極４と、これらの磁極３，４
に間に絶縁スペーサ５で挟まれたコイル６が設けられ、
磁極３，４とコイル６は全体が保護膜８で覆われた構成
になっていた。[Prior Art] As shown in FIGS. 3 and 4, a conventional thin-film magnetic head includes an upper magnetic pole 3 and a lower magnetic pole made of a metal magnetic film on a non-magnetic substrate 2 with an insulating film 7 interposed therebetween. 4 and these magnetic poles 3, 4
A coil 6 sandwiched between insulating spacers 5 is provided,
The magnetic poles 3 and 4 and the coil 6 were entirely covered with a protective film 8.
［発明が解決しようとする課題］
この薄膜磁気ヘッドは、上部磁極３および下部磁極４が
電気的にはコイル６あるいは非磁性基板２あるいは他の
電極（不図示）等に接続されていない。しかしながら、
コイル６は上部磁極３および下部磁極４とは絶縁スペー
サ５を介して静電気的に結合されている。このため、上
部磁極３または下部磁極４が金属膜性の導電性磁性媒体
に接触すると、アース電位になっている磁性媒体へ上部
磁極３および下部磁極４にコイル６との静電結合で荷電
されている電荷が瞬間的に移動する現象が起きる。この
電荷の移動はコイル６に電圧の変化として現われる。[Problems to be Solved by the Invention] In this thin film magnetic head, the upper magnetic pole 3 and the lower magnetic pole 4 are not electrically connected to the coil 6, the nonmagnetic substrate 2, or other electrodes (not shown). however,
The coil 6 is electrostatically coupled to the upper magnetic pole 3 and the lower magnetic pole 4 via an insulating spacer 5. Therefore, when the upper magnetic pole 3 or the lower magnetic pole 4 comes into contact with a conductive magnetic medium made of a metal film, the magnetic medium, which is at ground potential, is charged due to the electrostatic coupling between the upper magnetic pole 3 and the lower magnetic pole 4 and the coil 6. A phenomenon occurs in which the electric charge that is currently moving moves instantaneously. This charge movement appears in the coil 6 as a change in voltage.
以上述べたように、従来の薄膜磁気ヘッドは、金属膜な
どの導電性磁性媒体が磁極に接触すると、磁性媒体から
の本来の信号とは異なる雑音信号がコイルに誘起される
という欠点がある。As described above, the conventional thin film magnetic head has a drawback that when a conductive magnetic medium such as a metal film comes into contact with a magnetic pole, a noise signal different from the original signal from the magnetic medium is induced in the coil.
［課題を解決するための手段］
本発明の薄膜磁気ヘッドは、導電性の基板−ｈに絶縁膜
を介して保護膜に覆われた金属磁性膜で作られた磁極と
コイルが配置され、前記磁極の一部は前記保護膜より露
出して前記基板の磁性媒体対向面以外の面に電気的に接
続されている。[Means for Solving the Problems] A thin-film magnetic head of the present invention includes magnetic poles and coils made of a metal magnetic film covered with a protective film via an insulating film on a conductive substrate-h, A portion of the magnetic pole is exposed from the protective film and is electrically connected to a surface of the substrate other than the surface facing the magnetic medium.
［作 用］
金属磁性膜で作られた磁極の保護膜から露出している部
分が使用状態でアース電位になる導電性基板の磁性媒体
対向面以外の面に電気的に接続されてるので、磁極は基
板と同電位になり、磁極にアース電位の導電性磁性媒体
が接触しても、磁極に荷電されていた電荷が移動して雑
音信号がコイルに誘起されることがない。[Function] The part of the magnetic pole made of a metal magnetic film that is exposed from the protective film is electrically connected to the surface of the conductive substrate other than the surface facing the magnetic medium, which is at ground potential during use. has the same potential as the substrate, and even if a conductive magnetic medium at ground potential comes into contact with the magnetic pole, the electric charge on the magnetic pole will not move and a noise signal will not be induced in the coil.
［実施例］
次に、本発明の実施例について図面を参照して説明する
。[Example] Next, an example of the present invention will be described with reference to the drawings.
第１図は本発明の薄膜磁気ヘッドの一実施例の斜視図、
第２図は第１図のＡ−Ａ線縦断面図である。FIG. 1 is a perspective view of an embodiment of the thin film magnetic head of the present invention;
FIG. 2 is a longitudinal sectional view taken along line A--A in FIG. 1.
薄膜磁気ヘッド１は葛おむね長方形をした導電性の基板
９の磁性媒体対向面１３とは垂直な１面の上に絶縁膜７
を介してコイル６と磁極ＩＯが設けられ、コイル６およ
び磁極１０の全体が保護膜８で覆われている。磁極１０
は金属膜で作られ、第４図の磁極３，４に延長部分１１
がつけられた形状をなしており、第２図に示すように、
基板９の磁性媒体対向面Ｉ３の側に記録再生ギャップ部
分が保護膜８から露出しているほかに、延長部分１１の
先端が基板９の背面１４の側に保護膜８から露出し、こ
の磁極１０の延長部分１１の露出部が導電性接着剤によ
って基板９に電気的に接続されている。The thin film magnetic head 1 has an insulating film 7 on one surface perpendicular to the magnetic medium facing surface 13 of a generally rectangular conductive substrate 9.
The coil 6 and the magnetic pole IO are provided through the coil 6 and the magnetic pole 10, and the entire coil 6 and the magnetic pole 10 are covered with a protective film 8. magnetic pole 10
is made of a metal film, and has extension portions 11 on the magnetic poles 3 and 4 in Fig. 4.
As shown in Figure 2,
In addition to the recording/reproducing gap portion exposed from the protective film 8 on the side of the magnetic medium facing surface I3 of the substrate 9, the tip of the extension portion 11 is exposed from the protective film 8 on the side of the back surface 14 of the substrate 9, and this magnetic pole An exposed portion of the extension portion 11 of the substrate 10 is electrically connected to the substrate 9 by a conductive adhesive.
磁極ＩＯと基板９との電気的接続は、本実施例の導電性
接着剤によるほか、半田付、金属膜の蒸着またはスパッ
タあるいは機械的にバネで押える方法などが可能である
。The electrical connection between the magnetic pole IO and the substrate 9 can be made by using the conductive adhesive of this embodiment, or by soldering, vapor deposition or sputtering of a metal film, or mechanically pressing with a spring.
以上の構成により磁極ＩＯが基板９に電気的に接続され
ているので、本実施例の使用状態においては基板９が保
持されている磁気ヘッド保持基体（不図示）を通じてＪ
＃膜磁気ヘッド１が装着されている装置のアースと同電
位となり、アース電位の金属磁性膜などを使った磁性媒
体が磁極１０に接触しても、磁極１０から電荷が移動せ
ず、コイル６に雑音信号が誘起されない。With the above configuration, the magnetic pole IO is electrically connected to the substrate 9, so in the usage state of this embodiment, the magnetic pole IO is connected to the magnetic head holding base (not shown) on which the substrate 9 is held.
# The potential is the same as the ground of the device in which the film magnetic head 1 is mounted, and even if a magnetic medium made of a metal magnetic film or the like at ground potential comes into contact with the magnetic pole 10, the charge does not move from the magnetic pole 10 and the coil 6 No noise signal is induced.
［発明の効果］
以上説明したように本発明は、薄膜磁気ヘッドにおいて
、導電性の基板上に絶縁膜を介して保護膜に覆われた金
属磁性膜で作られた磁極とコイルを配置し、前記磁極の
一部を保護膜より露出させて基板の磁性媒体対向面以外
の面に電気的に接続することにより、磁極がアース電位
になる基板と同電位となるので、磁極にアース電位の金
属膜などの導電性磁性媒体が接触しても、磁極にコイル
との静電結合で荷電されていた電荷が前記磁性媒体に移
動してコイルに電圧変化を生じ雑音信号を発生すること
を防止できる効果がある。[Effects of the Invention] As explained above, the present invention provides a thin film magnetic head in which magnetic poles and coils made of a metal magnetic film covered with a protective film are placed on a conductive substrate via an insulating film, By exposing a part of the magnetic pole from the protective film and electrically connecting it to the surface of the substrate other than the surface facing the magnetic medium, the magnetic pole becomes at the same potential as the substrate, which is at ground potential. Even if a conductive magnetic medium such as a film comes into contact with the magnetic pole, it is possible to prevent the charge that was charged on the magnetic pole due to electrostatic coupling with the coil from moving to the magnetic medium, causing a voltage change in the coil and generating a noise signal. effective.
第１図は本発明の薄膜磁気ヘッドの一実施例の斜視図、
第２図は第１図のＡ−Ａ線縦断面図、第３図は薄膜磁気
ヘッドの従来例の斜視図、第４図は第３図のＢ−Ｂ線縦
断面図である。
１・・・薄膜磁気ヘッド、
６・・・コイル、
７・・・絶縁膜、
８・・・保護膜、
９・・・基板、
１０・・・磁極、
１１−・・延長部分、
１２−・・導電性接着剤、
１３−・磁性媒体対向面、
１４−・背面。FIG. 1 is a perspective view of an embodiment of the thin film magnetic head of the present invention;
2 is a longitudinal cross-sectional view taken along the line A--A in FIG. 1, FIG. 3 is a perspective view of a conventional thin film magnetic head, and FIG. 4 is a longitudinal cross-sectional view taken along the line B--B in FIG. DESCRIPTION OF SYMBOLS 1... Thin film magnetic head, 6... Coil, 7... Insulating film, 8... Protective film, 9... Substrate, 10... Magnetic pole, 11-... Extension part, 12-...・Conductive adhesive, 13-・Magnetic medium facing surface, 14-・Back surface.
Claims (1)
を介して保護膜に覆われた金属磁性膜で作られた磁極と
コイルが配置され、前記磁極の一部は前記保護膜より露
出して前記基板の磁性媒体対向面以外の面に電気的に接
続されていることを特徴とする薄膜磁気ヘッド。1. In a thin film magnetic head, a magnetic pole and a coil made of a metal magnetic film covered with a protective film are arranged on a conductive substrate through an insulating film, and a part of the magnetic pole is exposed from the protective film. A thin film magnetic head, wherein the thin film magnetic head is electrically connected to a surface of the substrate other than the surface facing the magnetic medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23702788A JPH0283808A (en) | 1988-09-20 | 1988-09-20 | Thin-film magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23702788A JPH0283808A (en) | 1988-09-20 | 1988-09-20 | Thin-film magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0283808A true JPH0283808A (en) | 1990-03-23 |
Family
ID=17009309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23702788A Pending JPH0283808A (en) | 1988-09-20 | 1988-09-20 | Thin-film magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0283808A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0470349A3 (en) * | 1990-08-09 | 1992-05-06 | Hewlett-Packard Company | A disk drive in which magnetic head-to-disk capacitive coupling is eliminated |
| US6166880A (en) * | 1991-08-13 | 2000-12-26 | Tdk Corporation | Thin film magnetic head which prevents errors due to electric discharge |
| JP2002347907A (en) * | 2001-05-28 | 2002-12-04 | Ishikawajima Harima Heavy Ind Co Ltd | Moving shelf control method and control device |
-
1988
- 1988-09-20 JP JP23702788A patent/JPH0283808A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0470349A3 (en) * | 1990-08-09 | 1992-05-06 | Hewlett-Packard Company | A disk drive in which magnetic head-to-disk capacitive coupling is eliminated |
| US6166880A (en) * | 1991-08-13 | 2000-12-26 | Tdk Corporation | Thin film magnetic head which prevents errors due to electric discharge |
| JP2002347907A (en) * | 2001-05-28 | 2002-12-04 | Ishikawajima Harima Heavy Ind Co Ltd | Moving shelf control method and control device |
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