JPH0384705A - Modulation magnetic field generator - Google Patents
Modulation magnetic field generatorInfo
- Publication number
- JPH0384705A JPH0384705A JP22021289A JP22021289A JPH0384705A JP H0384705 A JPH0384705 A JP H0384705A JP 22021289 A JP22021289 A JP 22021289A JP 22021289 A JP22021289 A JP 22021289A JP H0384705 A JPH0384705 A JP H0384705A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic field
- recording medium
- recording
- magneto
- heat
- 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
- 238000004804 winding Methods 0.000 claims abstract description 6
- 230000005415 magnetization Effects 0.000 claims description 3
- 230000003287 optical effect Effects 0.000 claims description 3
- 230000005381 magnetic domain Effects 0.000 claims description 2
- 230000001678 irradiating effect Effects 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 239000000696 magnetic material Substances 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 4
- 239000000126 substance Substances 0.000 abstract 2
- 239000004020 conductor Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000020169 heat generation Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
Landscapes
- Recording Or Reproducing By Magnetic Means (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、光磁気記録方式における変調磁界発生装置に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a modulated magnetic field generating device in a magneto-optical recording system.
（従来の技術）
従来、この種の変調磁界発生装置は一般に第２図に示す
ような構成になっている。ここでは変調磁界発生装置２
２は光学ヘッド２１に対向する位置にアーム２５にて、
光磁気ディスク２０を挟むように配設されており、その
コイルに対して情報信号源２３から信号電流をうける。(Prior Art) Conventionally, this type of modulated magnetic field generating device generally has a configuration as shown in FIG. Here, modulated magnetic field generator 2
2 has an arm 25 at a position facing the optical head 21,
It is arranged to sandwich the magneto-optical disk 20, and receives a signal current from an information signal source 23 to the coil.
一方、光磁気ディスク２０はスピンドルモータ２４で回
転駆動される。上記変調磁界発生装置２２は、例えば、
第３図に示すように、磁性体ブロック１上に導体パター
ンにより端子４を形成し、その内端に上方に連なる接続
点６を構成するように上記接続点および端子４を残して
絶縁層７を積層し、ここに渦巻状の導体パターンによっ
てプリントコイル３を形成することで、上記コイル内端
を上記接続点６に接続すると共に、その外端を上記絶縁
層７の縁から磁性体ブロック１にかけて設けた端子５に
接続するように構成されている。しかしながら、記録密
度の向上や高速動作の要求から上記磁界発生装置２２は
数ＭＨｚ程度の高周波を供給した場合、所望の磁界強度
を得ることができず、数ＭＨｚ程度の高周波を供給した
場合、所望の磁界強度を得ることができず、また、発熱
という弊害が生じる。On the other hand, the magneto-optical disk 20 is rotationally driven by a spindle motor 24. The modulated magnetic field generator 22 includes, for example,
As shown in FIG. 3, terminals 4 are formed by a conductor pattern on the magnetic block 1, and an insulating layer 7 is formed, leaving the connection points and the terminals 4 so as to form connection points 6 extending upward at the inner ends thereof. By laminating the printed coil 3 with a spiral conductor pattern, the inner end of the coil is connected to the connection point 6, and the outer end is connected to the magnetic block 1 from the edge of the insulating layer 7. It is configured to be connected to a terminal 5 provided across. However, due to the demands for improved recording density and high-speed operation, the magnetic field generator 22 cannot obtain the desired magnetic field strength when it supplies a high frequency of about several MHz; It is not possible to obtain a magnetic field strength of
すなわち、上記変調磁界発生装置は光磁気記録媒体の磁
化の方向を反転させるために必要で十分な所要の磁界を
上記記録媒体に印加する必要がある。That is, the modulating magnetic field generating device needs to apply a required magnetic field necessary and sufficient to reverse the direction of magnetization of the magneto-optical recording medium to the recording medium.
しかし、磁性体材料の周波数特性から所望の磁界強度を
得ることが困難である。これに対して上記変調磁界発生
装置に供給する信号電流を大きくすれば、所望の磁界強
度を得ることが可能であるが、清貧電力の増大、発熱、
導体パターンの断線が生じることになる。However, it is difficult to obtain a desired magnetic field strength due to the frequency characteristics of the magnetic material. On the other hand, if the signal current supplied to the modulated magnetic field generator is increased, it is possible to obtain the desired magnetic field strength, but this results in an increase in power consumption, heat generation,
This will result in disconnection of the conductor pattern.
（発明が解決しようとする課題）
上記変調磁界発生装置の発熱により、磁性体材料の特性
劣化が生じ、高周波帯での必要な強磁界を得ることがで
きない。また、上記発熱の影響を受けて光磁気記録媒体
自体が温度上昇することで、記録時の記録条件が変化し
、安定した記録動作ができず、エラー発生の原因ともな
る。さらに、導体パターンなどの熱的損傷が発生するお
それもある。(Problems to be Solved by the Invention) The heat generated by the modulated magnetic field generating device causes characteristic deterioration of the magnetic material, making it impossible to obtain a necessary strong magnetic field in a high frequency band. Furthermore, the temperature of the magneto-optical recording medium itself increases under the influence of the heat generation, which changes the recording conditions during recording, making it impossible to perform stable recording operations and causing errors. Furthermore, there is a risk that thermal damage to the conductive patterns and the like may occur.
（発明の目的）
本発明は上記事情にもとづいてなされたもので、変調磁
界発生装置の放熱効果を向上させ、高周波の変調磁界を
発生させ、光磁気記録媒体への安定した記録動作を実現
するようにした変調磁界発生装置を提供しようとするも
のである。(Object of the Invention) The present invention has been made based on the above circumstances, and has an object to improve the heat dissipation effect of a modulated magnetic field generator, generate a high frequency modulated magnetic field, and realize stable recording operation on a magneto-optical recording medium. It is an object of the present invention to provide a modulated magnetic field generating device as described above.
（課題を解決するための手段）
このため、本発明では光磁気記録媒体に光学ヘッドから
の光ビームを照射して温度上昇させると共に、変調磁界
を印加して磁化配向を有する磁区の向きをかえ、情報を
記録するようにした光磁気記録方式において、主たる磁
界成分が上記記録媒体の記録層に対して垂直となるよう
に配置された磁界発生用コイルが上記記録媒体の記録層
に対向した平面において、渦巻状の巻線部を具備し、か
つ上記平面よりも、上記記録媒体から離れる方向に磁性
体ブロックおよび放熱板を配設している。(Means for Solving the Problems) Therefore, in the present invention, a magneto-optical recording medium is irradiated with a light beam from an optical head to raise its temperature, and a modulated magnetic field is applied to change the direction of magnetic domains having magnetization orientation. , in a magneto-optical recording system for recording information, a plane in which a magnetic field generating coil, which is arranged so that the main magnetic field component is perpendicular to the recording layer of the recording medium, faces the recording layer of the recording medium. The recording medium includes a spiral winding portion, and a magnetic block and a heat sink are arranged in a direction away from the recording medium rather than the plane.
（作用）
このような構成では、上記巻線部から発生した熱を磁性
材料の基板を介し放熱板により放熱させるので、放熱効
果が向上し、基板温度の上昇を抑えられる。したがって
、変調磁界発生装置の発熱が抑制でき、高周波の変調磁
界を発生させるに際して、光磁気記録媒体への安定した
記録動作が行なえる。(Function) In such a configuration, the heat generated from the winding portion is radiated by the heat radiating plate through the substrate made of a magnetic material, so that the heat radiating effect is improved and a rise in substrate temperature can be suppressed. Therefore, heat generation in the modulated magnetic field generating device can be suppressed, and stable recording operation on the magneto-optical recording medium can be performed when generating a high frequency modulated magnetic field.
（実施例）
以下、本発明の一実施例を図面を参照して具体的に説明
する。なお、本実施例において光磁気記録装置について
の構成部分が先述の従来例と同様な構成部分であるとこ
ろは、同一符号を付けてその説明を省略し、本発明に係
る部分について詳述する。第１図（ａ） 、（ｂ）に示
すように、ここでは磁性体ブロック１上に導体パターン
８によって端子４を構威し、また、その内端に上方に連
なる接続点６を構成する。そして、上記接続点６および
端子４の外端を残して絶縁層７をその上に積層する。(Example) Hereinafter, an example of the present invention will be specifically described with reference to the drawings. In this embodiment, the same constituent parts of the magneto-optical recording apparatus as those of the prior art described above are given the same reference numerals, and the explanation thereof will be omitted, and only the parts related to the present invention will be described in detail. As shown in FIGS. 1(a) and 1(b), a terminal 4 is provided on the magnetic block 1 by a conductive pattern 8, and a connecting point 6 extending upward is provided at the inner end thereof. Then, the insulating layer 7 is laminated thereon, leaving the connection point 6 and the outer end of the terminal 4.
また、上記絶縁層７上に渦巻状の導体パターン８によっ
てプリントコイル３を形成し、そのコイル内端を上記接
続点に接続する。また、上記コイルの外端を上記絶縁層
７の縁から磁性体ブロック１にかけて設けた端子５に接
続する。そして、このプリントコイル３が設けられてい
るのとは反対側において、上記磁性体ブロック１には放
熱板９が配設されている。Further, a printed coil 3 is formed by a spiral conductor pattern 8 on the insulating layer 7, and the inner end of the coil is connected to the connection point. Further, the outer end of the coil is connected to a terminal 5 provided from the edge of the insulating layer 7 to the magnetic block 1. A heat sink 9 is provided on the magnetic block 1 on the side opposite to where the printed coil 3 is provided.
このような構成では、プリントコイル３に信号電流が流
れた時発生する熱は、絶縁層２、絶縁層７および放熱板
９を介して空気中に放出される。In such a configuration, heat generated when a signal current flows through the printed coil 3 is released into the air via the insulating layer 2, the insulating layer 7, and the heat sink 9.
とくに、プリントコイル３から発生した熱は磁性体ブロ
ック１を介して放熱板９に到り、そこから効率よく放散
される。その結果、磁性体ブロック１の温度上昇を抑制
でき、その特性劣化がさけられる。したがって、変調磁
界発生装置としての発熱を抑制でき、高周波の変調磁界
を得る際、光磁気記録媒体への安定した記録動作が行な
える。In particular, the heat generated from the printed coil 3 reaches the heat sink 9 via the magnetic block 1 and is efficiently dissipated from there. As a result, the temperature rise of the magnetic block 1 can be suppressed, and deterioration of its characteristics can be avoided. Therefore, heat generation as a modulated magnetic field generating device can be suppressed, and stable recording operation on the magneto-optical recording medium can be performed when obtaining a high frequency modulated magnetic field.
（発明の効果）
本発明は以上詳述したようになり、放熱効果を向上する
ことができるため、変調磁界発生装置の温度上昇を抑制
し、高周波の変調磁界を発生させる際、安定した記録動
作を確保し、信頼性を向上できる。(Effects of the Invention) As described in detail above, the present invention can improve the heat dissipation effect, suppress the temperature rise of the modulated magnetic field generator, and ensure stable recording operation when generating a high frequency modulated magnetic field. and improve reliability.
第１図（ａ） 、（ｂ）は本発明の一実施例を示す上面
図および断面図、第２図は従来の変調磁界発生装置の構
成を示す光磁気記録装置の模式図、第３図（ａ） 、
（ｂ）は従来例の上面図および断面図である。
１・・・磁性体ブロック、２・・・絶縁層、３・・・プ
リントコイル、４．５・・・端子、６・・・接続点、７
・・・絶縁層、８・・・プリント導体パターン、９・・
・放熱板。FIGS. 1(a) and (b) are a top view and a sectional view showing an embodiment of the present invention, FIG. 2 is a schematic diagram of a magneto-optical recording device showing the configuration of a conventional modulated magnetic field generating device, and FIG. (a),
(b) is a top view and a sectional view of a conventional example. DESCRIPTION OF SYMBOLS 1... Magnetic block, 2... Insulating layer, 3... Printed coil, 4.5... Terminal, 6... Connection point, 7
...Insulating layer, 8...Printed conductor pattern, 9...
・Heat sink.
Claims (1)
温度上昇させると共に、変調磁界を印加して磁化配向を
有する磁区の向きをかえ、情報を記録するようにした光
磁気記録方式において、主たる磁界成分が上記記録媒体
の記録層に対して垂直となるように配置された磁界発生
用コイルが上記記録媒体の記録層に対向した平面におい
て渦巻状の巻線部を具備し、かつ上記平面よりも、上記
記録媒体から離れる方向に磁性体ブロックおよび放熱板
を配設していることを特徴とする変調磁界発生装置。The main method of magneto-optical recording is to record information by irradiating a magneto-optical recording medium with a light beam from an optical head to raise its temperature, and by applying a modulating magnetic field to change the direction of magnetic domains with magnetization orientation. A magnetic field generating coil arranged such that a magnetic field component is perpendicular to the recording layer of the recording medium has a spiral winding portion in a plane facing the recording layer of the recording medium, and Also, a modulated magnetic field generating device characterized in that a magnetic block and a heat sink are arranged in a direction away from the recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22021289A JPH0384705A (en) | 1989-08-29 | 1989-08-29 | Modulation magnetic field generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22021289A JPH0384705A (en) | 1989-08-29 | 1989-08-29 | Modulation magnetic field generator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0384705A true JPH0384705A (en) | 1991-04-10 |
Family
ID=16747646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22021289A Pending JPH0384705A (en) | 1989-08-29 | 1989-08-29 | Modulation magnetic field generator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0384705A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999057718A1 (en) * | 1998-05-07 | 1999-11-11 | Canon Kabushiki Kaisha | Coil for magnetic head, magnetic head, and magneto-optical recorder |
| US6963474B2 (en) * | 2001-01-16 | 2005-11-08 | Tdk Corporation | Thin film magnetic head, magnetic head and magnetic disk driving device |
-
1989
- 1989-08-29 JP JP22021289A patent/JPH0384705A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1999057718A1 (en) * | 1998-05-07 | 1999-11-11 | Canon Kabushiki Kaisha | Coil for magnetic head, magnetic head, and magneto-optical recorder |
| EP1085505A1 (en) * | 1998-05-07 | 2001-03-21 | Canon Kabushiki Kaisha | Coil for magnetic head, magnetic head, and magneto-optical recorder |
| EP1085505A4 (en) * | 1998-05-07 | 2002-07-17 | Canon Kk | Coil for magnetic head, magnetic head, and magneto-optical recorder |
| US6584045B1 (en) | 1998-05-07 | 2003-06-24 | Canon Kabushiki Kaisha | High speed magnetic coil for magneto-optical head |
| US6963474B2 (en) * | 2001-01-16 | 2005-11-08 | Tdk Corporation | Thin film magnetic head, magnetic head and magnetic disk driving device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100377703B1 (en) | Coil for magnetic head, magnetic head, and magnetic-optical recorder | |
| EP0742557B1 (en) | Thin film magnetic head for use with magneto-optic disc drive | |
| JP2897462B2 (en) | Thin film magnetic head assembly and method of manufacturing the same | |
| JPH0863824A (en) | Magnetic head for magnetooptical recording, manufacture thereof, and magnetooptical recorder | |
| JPH0384705A (en) | Modulation magnetic field generator | |
| JPH0384704A (en) | Modulation magnetic field generator | |
| JP2000090403A (en) | Magnetic head for magneto-optical recording and magneto-optical recording device | |
| JP2000030203A (en) | Coil for magnetic head, magnetic head for magneto-optical recording, and magneto-optical recorder | |
| JP2830940B2 (en) | Modulated magnetic field generator | |
| JPH10255205A (en) | Magnetic head for magneto-optical recording, and magneto-optical recording apparatus | |
| JP2923384B2 (en) | Magnetic head | |
| JP2940649B2 (en) | Magnetic field generator for magneto-optical recording | |
| JP3040629B2 (en) | Magnetic head device | |
| JPH0430303A (en) | Magneto-optical recording and reproducing device | |
| JP2001307302A (en) | Optical head for magneto-optical recording | |
| JPH02130701A (en) | Magneto-optical recording device | |
| JPH0358303A (en) | Magnetic field modulating head for magneto-optical recording | |
| JP2793902B2 (en) | Magnetic field generator for magneto-optical recording | |
| JP2801380B2 (en) | Floating magnetic head for magneto-optical recording and magneto-optical recording device | |
| JPH04102202A (en) | Magnetic field generator for magneto-optical recording | |
| JPH08339585A (en) | Magnetic head for magneto-optical recording | |
| JPH08249743A (en) | External magnetic field generating head | |
| JPH04119503A (en) | Magnetic head unit for magneto-optical recording | |
| JPH08106665A (en) | Magneto-optical recorder and magnetic head | |
| JPH02235203A (en) | Bias magnetic field generator |