JPH0358303A - Magnetic field modulating head for magneto-optical recording - Google Patents
Magnetic field modulating head for magneto-optical recordingInfo
- Publication number
- JPH0358303A JPH0358303A JP19187389A JP19187389A JPH0358303A JP H0358303 A JPH0358303 A JP H0358303A JP 19187389 A JP19187389 A JP 19187389A JP 19187389 A JP19187389 A JP 19187389A JP H0358303 A JPH0358303 A JP H0358303A
- Authority
- JP
- Japan
- Prior art keywords
- magneto
- magnetic field
- optical recording
- coil
- head
- 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
- 238000001816 cooling Methods 0.000 abstract description 11
- 230000020169 heat generation Effects 0.000 abstract description 4
- 239000000758 substrate Substances 0.000 abstract description 4
- 239000000853 adhesive Substances 0.000 abstract description 2
- 230000015556 catabolic process Effects 0.000 abstract description 2
- 238000006731 degradation reaction Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- 239000010409 thin film Substances 0.000 description 4
- 239000010408 film Substances 0.000 description 3
- 230000007774 longterm Effects 0.000 description 3
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 229910003962 NiZn Inorganic materials 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 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、光磁気記録用磁界変調ヘッドに係わる。[Detailed description of the invention] [Industrial application field] The present invention relates to a magnetic field modulation head for magneto-optical recording.
（発明の概要）
本発明は、記録信号によって変調された高周波電流が印
加される光磁気記録用磁界発生用コイルを有する光磁気
記録用磁界変調ヘッド素子に熱的に結合してベルチェ素
子を設けてるＲ気ヘッド素子の冷却を効果的に行うこと
ができるようにして光磁気記録用の磁界強度を充分高め
得る電流をコイルに通電することを可能にし、また長時
間使用，長寿命化をはかるものである。(Summary of the Invention) The present invention provides a Vertier element thermally coupled to a magnetic field modulation head element for magneto-optical recording having a magnetic field generating coil for magneto-optical recording to which a high frequency current modulated by a recording signal is applied. This makes it possible to effectively cool the head element and to supply a current to the coil that can sufficiently increase the magnetic field strength for magneto-optical recording, and also to achieve long-term use and longevity. It is something.
〔従来の技術］
磁界変調方式による光磁気記録は、その原理的構戒を第
３図に示すように、その光磁気記録媒体（１）例えば光
磁気ディスクの光磁気記録膜面（２）に例えばレーザー
光（３）を集光レンズ系（４）によってフォーカスさせ
てその記録を行わんとする部分を所要の温度に加熱する
と共に、この加熱部にデータ変調器（５）からの記録デ
ータによって変調された高周波電流が印加されて光磁気
記録用磁界を発生する光磁気記録用磁界変調ヘッド（６
）が設けられ、これよりの記録データに基づいて変調さ
れた垂直の磁界旧が印加されて光磁気記録膜面（２）に
垂直磁化による記録がなされる。[Prior Art] Magneto-optical recording using the magnetic field modulation method is basically structured as shown in Figure 3. For example, a laser beam (3) is focused by a condensing lens system (4) to heat the area to be recorded to a required temperature, and the heated area is heated by recording data from a data modulator (5). A magnetic field modulation head (6) for magneto-optical recording that generates a magnetic field for magneto-optical recording by applying a modulated high frequency current.
) is provided, and a perpendicular magnetic field modulated based on recorded data is applied to perform recording by perpendicular magnetization on the magneto-optical recording film surface (2).
このような光磁気記録方式によれば、先に記録した記録
データ上に新しい記録データに基づいた重ね書きいわゆ
るオーバーライトを行うことができる。According to such a magneto-optical recording method, it is possible to overwrite previously recorded data based on new recorded data.
この種の光磁気記録においては、光磁気記録媒体（１）
のゆれ等によって光磁気記録用磁界変調ヘッド（６）と
媒体（１）とが接触して相互に擦傷，破損等の損耗が発
生ずることがないように、その光磁気記録用磁界変調ヘ
ッド（６）は光磁気記録媒体（１）と所要の比較的大な
る間隔が保持されるようにすることが望ましく、これが
ため、確実なデータ記録を行うには記録用磁界Ｈを高め
ることが必要となってく る。In this type of magneto-optical recording, the magneto-optical recording medium (1)
To prevent the magnetic field modulation head (6) for magneto-optical recording from coming into contact with the medium (1) due to vibration etc. and causing wear such as scratches or damage to each other, the magnetic field modulation head (6) for magneto-optical recording ( 6), it is desirable to maintain a relatively large distance from the magneto-optical recording medium (1), and for this reason, it is necessary to increase the recording magnetic field H to ensure reliable data recording. It's coming.
一方、光磁気記録用磁界変調ヘッド（６）としては、そ
の小型量産化の上からその記録用磁界発生用のコイルを
薄膜コイルによって構或することが望まれる。この場合
、特にその発生磁界を高め、かつ高密度記録をはかるこ
とから大電流高周波電流の印加を必要とし、これがため
コイルからの発熱が問題となる。すなわちこの発熱によ
る磁界発生効率の低下．コイルの破損が問題となる。On the other hand, for the magnetic field modulation head (6) for magneto-optical recording, it is desired that the coil for generating the magnetic field for recording be constructed of a thin film coil in order to make the head compact and mass-produced. In this case, in order to particularly increase the generated magnetic field and achieve high-density recording, it is necessary to apply a large current and high frequency current, which poses a problem of heat generation from the coil. In other words, the magnetic field generation efficiency decreases due to this heat generation. Damage to the coil becomes a problem.
このため、この種の磁気ヘッドでは、その冷却が必要と
なってくる。For this reason, this type of magnetic head requires cooling.
従来、磁気ヘッドの冷却には、その磁気ヘッド素子を熱
伝導率の高いアルξニウム等の金属や絶縁体の上に設置
する方法、あるいは電動冷却ファンによって送風冷却す
る方法、あるいはこれらの組合せ等が用いられている。Conventionally, magnetic heads have been cooled by placing the magnetic head element on a metal or insulator with high thermal conductivity such as aluminum, or by blowing air with an electric cooling fan, or a combination of these methods. is used.
しかしながらこのような方法では、上述した薄膜コイル
型の光磁気記録用磁界変調ヘッドにおける冷却としては
充分ではない。そのため、コイルに充分な電流印加を行
うことができず、これによって充分大きな記録用磁界発
生が得られず、光磁気記録媒体と磁気ヘッドとの間隔を
充分大とすることがなし得ないとか、また大きな記録用
磁界を発生できる高周波大電流をコイルに通電すればコ
イルの焼断などの発生から、長時間使用，長寿命化を阻
害するなどの不都合が生じている。However, such a method is not sufficient for cooling the above-mentioned thin film coil type magnetic field modulation head for magneto-optical recording. Therefore, it is not possible to apply a sufficient current to the coil, and as a result, it is not possible to generate a sufficiently large recording magnetic field, and it is not possible to make the distance between the magneto-optical recording medium and the magnetic head sufficiently large. Furthermore, if a high-frequency, large current capable of generating a large recording magnetic field is applied to the coil, the coil may burn out, resulting in disadvantages such as impeding long-term use and longevity.
本発明においては、光磁気記録用磁界変調ヘッドにおい
て、その光磁気記録用磁界発生用コイルを効率よく冷却
することができ、したがって、このコイルに高周波を印
加することができるようにして大きな光磁気記録用磁界
発生を行わしめて、これによって光磁気記録媒体と磁界
変調ヘッドとの間隔を必要充分にとることができ、安定
した動作を長時間連続で行わしめ得、また長寿命化をは
かることができるようにすることを主たる目的とする。In the present invention, in a magnetic field modulation head for magneto-optical recording, the coil for generating a magnetic field for magneto-optical recording can be efficiently cooled. By generating a magnetic field for recording, it is possible to maintain a necessary and sufficient distance between the magneto-optical recording medium and the magnetic field modulation head, to ensure stable operation for a long period of time, and to extend the service life. The main purpose is to make it possible.
（課題を解決するための手段）
本発明は、第１図に示すように高周波大電流が印加され
る光磁気記録用磁界発生用コイル（１ｌ）を有する光磁
気記録用磁界変調ヘッド素子（１２）に熱的に結合して
ペルチェ素子（１３）すなわち電子冷却素子を設ける。(Means for Solving the Problems) As shown in FIG. 1, the present invention provides a magnetic field modulation head element (12) for magneto-optical recording which has a magnetic field generating coil (1l) for magneto-optical recording to which a high frequency large current is applied. ) is thermally coupled to provide a Peltier element (13), that is, an electronic cooling element.
（作用］
上述の本発明装置によれば、光｛狂気記録用磁界変調ヘ
ッド素子（１２）にペルチェ素子（１３）を設けたこと
によってこれを積極的に冷却するようにしたので光磁気
記録用磁界発生用コイル（ｌ１）が効率よく冷却され、
これによってこの磁界発生用コイル（１１）への通電電
流を高周波大電流の印加によってもその発熱によって効
果的にコイルの破損あるいは磁界発生効率の低下を将来
することを回避でき、これによって通電電流量の増大化
をはかることができ、強力な磁界発生を可能にし、確実
な光磁気記録を行うことができると共に光磁気記録媒体
（１）と光磁気記録用磁界変調ヘッド（６）との間隔を
充分大とすることができて、安定な動作を長時間の連続
使用で可能にし、さらに長寿命化を可能にするものであ
る。(Function) According to the above-described apparatus of the present invention, the Peltier element (13) is provided in the magnetic field modulation head element (12) for optical recording, so that it is actively cooled. The magnetic field generating coil (l1) is efficiently cooled,
As a result, even if a high-frequency large current is applied to the magnetic field generation coil (11), it is possible to effectively prevent damage to the coil or a decrease in magnetic field generation efficiency due to the heat generation, and thereby the amount of current applied. It is possible to increase the distance between the magneto-optical recording medium (1) and the magnetic field modulation head (6) for magneto-optical recording, making it possible to generate a strong magnetic field and perform reliable magneto-optical recording. It can be made sufficiently large, allows stable operation for long periods of continuous use, and further extends its life.
［実施例〕
第１図を参照してさらに本発明による光磁気記録用磁界
変調ヘッドの一例を詳細に説明する。[Example] An example of the magnetic field modulation head for magneto-optical recording according to the present invention will be further described in detail with reference to FIG.
（１６）は本発明による光磁気記録用磁界変調ヘッドを
全体として示す。（Ｉ４）はヘッド基板例えば磁性基板
で、例えばＮｉＺｎフエライト等の２０ＭＨｚにおける
透磁率５０〜１００の磁性体より或り、これの上に例え
ば窒化アルミニウム（Ａ Ｉ Ｎ）の絶縁層が被着され
てなり、これの上に光磁気記録用磁界発生用コイル（１
１）が形成される。このコイル（１１）は、基板（１４
）上に被着形或された例えばＣｕ薄膜が線幅１３μｍ程
度をもって渦巻状パターンの下層コイルパターン（Ｉｌ
ｄ） と、これの上に絶縁材（１５）が塗布されて、さ
らにこれの上に被着形戒された同様のＣ ｕ 薄Ｈａよ
り成る上層コイルパターン（ｌｌｕ） との積層コイ
ルによって形威し得る。これら薄膜コイルパターン（ｌ
ｉｄ）及び（ｌｌｕ）は、絶縁１（１５）の一部に開口
した透孔（図示せず）を通じてその一部が連結されて全
体的に連続した１本のコイル（１１）が形威されるよう
になされ、そのコイル（１１）の両端からそれぞれ端子
（ＩＩＡ）及び（ＩＩＢ）の導出例えば両コイルパター
ン（ｌｉｄ）及び（ｌｌｕ）の形戊と同時に形威され、
さらに図示しないがそのコイルの中間部において必要に
応じて中間端子の導出がなされる。(16) shows the magnetic field modulation head for magneto-optical recording according to the present invention as a whole. (I4) is a head substrate, for example a magnetic substrate, made of a magnetic material such as NiZn ferrite having a magnetic permeability of 50 to 100 at 20 MHz, on which an insulating layer of aluminum nitride (AIN) is deposited. On top of this is a coil for generating a magnetic field for magneto-optical recording (1
1) is formed. This coil (11) is connected to the substrate (14
For example, a Cu thin film deposited on top of the spiral pattern (Il) has a line width of about 13 μm.
d), an insulating material (15) is applied on top of this, and a similar upper layer coil pattern (llu) made of thin Ha is deposited on top of this. It is possible. These thin film coil patterns (l
id) and (llu) are partially connected through a through hole (not shown) opened in a part of the insulation 1 (15) to form one continuous coil (11). Terminals (IIA) and (IIB) are derived from both ends of the coil (11), for example, at the same time as the coil patterns (lid) and (llu) are shaped.
Further, although not shown, an intermediate terminal is led out from the intermediate portion of the coil as necessary.
そして、本発明においては、この磁界変調ヘッド素子（
１１）の基板（１４）の裏面に導電性ペースト等の良熱
伝導性の導電性接着剤（２０）を介してペルチェ素子（
１３）の冷却極側を熱的に密に結合する。In the present invention, this magnetic field modulation head element (
A Peltier element (
The cooling electrode side of 13) is thermally tightly coupled.
このようにベルチェ素子（ｌ３）を具備する磁界変調ヘ
ッド素子（１２）のコイル（■１）への通電電流に対す
るコイル温度の測定結果を第２図に示す。同図において
曲線（２１） （２２） （２３） （２４）はそれぞ
れペルチェ素子の通電電流を０．４Ａ．０．６Ａ，０．
８Ａ，１．ＯＡとした場合で、同図中曲線（２５）はペ
ルチェ素子を設けることなく電動冷却ファンのみで冷却
を行った場合、曲線（２６）は全く冷却手段を設けない
場合でこれら曲線（２６）及び（２５）と曲線（２１）
〜（２４）とを比較して明らかなように、通常の記録電
流例えば０．５Ａ程度において格段にコイル温度が低下
することがわかる。通常、ＣｕＦ７膜コイルによる場合
のコイルの破壊温度は５０〜７０゜Ｃ程度であるのでペ
ルチェ素子（１３）を設けることによって充分な温度マ
ージンを得ることができることがわかる。FIG. 2 shows the measurement results of the coil temperature with respect to the current applied to the coil (1) of the magnetic field modulation head element (12) having the Beltier element (13) as described above. In the figure, curves (21), (22), (23), and (24) indicate the current flowing through the Peltier element at 0.4A. 0.6A, 0.
8A, 1. In the case of OA, curve (25) in the figure shows the case where cooling is performed only with an electric cooling fan without providing a Peltier element, and curve (26) shows the case where no cooling means is provided. (25) and curve (21)
As is clear from a comparison of (24) to (24), the coil temperature drops significantly at a normal recording current of, for example, about 0.5 A. Normally, the breakdown temperature of a CuF7 film coil is about 50 to 70 degrees Celsius, so it can be seen that a sufficient temperature margin can be obtained by providing the Peltier element (13).
尚、ベルチェ素子（１３）の温極側には、第１図に示す
ように熱伝導度の高いＡｆｆ等の放熱板（１７）を良熱
伝導接着剤（１９）によって接着し、さらに必要に応じ
て電動冷却ファン（１８）を配置することができる。As shown in Figure 1, a heat dissipation plate (17) such as Aff, which has high thermal conductivity, is glued to the hot pole side of the Beltier element (13) using a good heat conductive adhesive (19), and if necessary, An electric cooling fan (18) can be arranged accordingly.
上述したように本発明方法によれば、ペルチェ素子（１
２）を配置したことによって、格段にコイル（１１）の
温度低下を達或することができるので、これに応じて記
録電流の、より大電流高周波化をはかることができ、確
実なオーバーライト等の光磁気記録すなわち光磁気記録
媒体の光磁気記録膜に対する磁化と高密度記録を行うこ
とができる。As described above, according to the method of the present invention, a Peltier element (1
By arranging 2), the temperature of the coil (11) can be significantly lowered, and accordingly, the recording current can be increased to a higher current and frequency, ensuring reliable overwriting, etc. It is possible to perform magneto-optical recording, that is, magnetization and high-density recording on a magneto-optical recording film of a magneto-optical recording medium.
さらに、その記録磁界強度を高め得ることによって光磁
気記録媒体（１）と光磁気記録用磁界変調ヘッド（１６
）との間隔を充分大とすることができるので、光磁気記
録媒体例えば光磁気ディスクのいわゆるゆれ等による位
置変動によってヘッド（１６）と光磁気記録媒体（１）
とが接触するような不都合が回避されコイル温度の低下
と相俟つ．て安定な動作，長時間連続使用，長寿命化を
可能にするものである。Furthermore, by increasing the recording magnetic field strength, the magneto-optical recording medium (1) and the magnetic field modulation head for magneto-optical recording (16
), the distance between the head (16) and the magneto-optical recording medium (1) can be made sufficiently large, so that the head (16) and the magneto-optical recording medium (1) can
This avoids inconveniences such as contact between coils and lowers the coil temperature. This enables stable operation, long-term continuous use, and long life.
第１図は本発明による光磁気記録用磁界変調ヘッドの一
部を断面とした側面図、第２図はコイル温度一電流測定
曲線図、第３図は光磁気記録の動作原理の説明図である
。
（１）は光磁気記録媒体、（１６）は光磁気記録用磁界
変調ヘッド、（１２）はその光磁気記録用磁界変調一・
ッド素子、（１１）は光磁気記録用磁界発生用コイル、
（１３）はペルチェ素子である。
代
理
人
松
隈
秀
盛Fig. 1 is a partially sectional side view of a magnetic field modulation head for magneto-optical recording according to the present invention, Fig. 2 is a coil temperature-current measurement curve, and Fig. 3 is an explanatory diagram of the operating principle of magneto-optical recording. be. (1) is a magneto-optical recording medium, (16) is a magnetic field modulation head for magneto-optical recording, and (12) is the magnetic field modulation head for magneto-optical recording.
(11) is a coil for generating a magnetic field for magneto-optical recording;
(13) is a Peltier element. Agent Hidemori Matsukuma
Claims (1)
を有する光磁気記録用磁界変調ヘッド素子に熱的に結合
してペルチエ素子が設けられてなる光磁気記録用磁界変
調ヘッド。A magnetic field modulation head for magneto-optical recording comprising a Peltier element thermally coupled to a magnetic field modulation head element for magneto-optical recording having a magnetic field generating coil for magneto-optical recording to which a high frequency current is applied.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19187389A JPH0358303A (en) | 1989-07-25 | 1989-07-25 | Magnetic field modulating head for magneto-optical recording |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19187389A JPH0358303A (en) | 1989-07-25 | 1989-07-25 | Magnetic field modulating head for magneto-optical recording |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0358303A true JPH0358303A (en) | 1991-03-13 |
Family
ID=16281896
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19187389A Pending JPH0358303A (en) | 1989-07-25 | 1989-07-25 | Magnetic field modulating head for magneto-optical recording |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0358303A (en) |
-
1989
- 1989-07-25 JP JP19187389A patent/JPH0358303A/en active Pending
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