JPS5930222A - Magneto-resistance effect type magnetic head - Google Patents
Magneto-resistance effect type magnetic headInfo
- Publication number
- JPS5930222A JPS5930222A JP13848082A JP13848082A JPS5930222A JP S5930222 A JPS5930222 A JP S5930222A JP 13848082 A JP13848082 A JP 13848082A JP 13848082 A JP13848082 A JP 13848082A JP S5930222 A JPS5930222 A JP S5930222A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- sodium silicate
- magneto
- magnetic head
- effect type
- 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
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
- G11B5/3163—Fabrication methods or processes specially adapted for a particular head structure, e.g. using base layers for electroplating, using functional layers for masking, using energy or particle beams for shaping the structure or modifying the properties of the basic layers
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Magnetic Heads (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は磁気抵抗効果型磁気ヘッドに係り、さらに詳し
くは磁気抵抗効果素子パターンを形成した基板と保護基
板との間の接着構造を改良した磁気抵抗効果型磁気ヘッ
ドに関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetoresistive magnetic head, and more particularly to a magnetoresistive magnetic head with an improved adhesive structure between a substrate on which a magnetoresistive element pattern is formed and a protective substrate. It is something.
一般に、磁気抵抗効果型磁気ヘッド（以下ＭＲヘッドと
言う）は磁気抵抗効果素子（以下ＭＲ素子と言う）パタ
ーンを形成した基板と保護基板な有機系の接着剤による
接着等の方法により貼り合わせることで磁気抵抗変化を
検出する感知部を保護し、その後切削加工を経て磁気記
録媒体摺動面を形成していた。In general, a magnetoresistive magnetic head (hereinafter referred to as MR head) is bonded to a substrate on which a magnetoresistive element (hereinafter referred to as MR element) pattern is formed and a protective substrate using a method such as bonding with an organic adhesive. The sensing part that detects changes in magnetoresistance was protected by a process, and the sliding surface of the magnetic recording medium was then formed through cutting.
しかし、接着部において接着剤の一部が切削加工や磁気
記録媒体の摺動中に脱落することが多く、ＭＲヘッドの
信頼性が著しく低下していた。However, a portion of the adhesive at the bonded portion often falls off during cutting or sliding of the magnetic recording medium, significantly reducing the reliability of the MR head.
このような欠点を改良するために、無機系接着剤である
珪酸ナトリウムを用い、接着部の硬度を上げ、 ＭＲヘ
ッドの信頼性の向上をはかる方法が提案された。In order to improve these drawbacks, a method has been proposed in which an inorganic adhesive, sodium silicate, is used to increase the hardness of the bonded area, thereby improving the reliability of the MR head.
しかし、この方法は完全に接着するまでの時間が長くな
り、生産性が悪く、さらには接着部に発泡が生じる場合
もあり接着強度も不十分である等の理由により期待する
ほど接着部の信頼性も向上が得られなかった。However, this method takes a long time to completely bond, has poor productivity, and also has problems such as foaming at the bonded area and insufficient adhesive strength. There was also no improvement in sex.
また、接着硬化は試料に圧力をかけて加熱して行なって
いるため、基板に歪が生じ硬化後において基板にクラッ
クが生じる欠点もあった。Furthermore, since adhesive curing is carried out by applying pressure to the sample and heating it, there is also the drawback that distortion occurs in the substrate and cracks occur in the substrate after curing.
本発明は以上のような従来の欠点を除去するた信頼性を
向上させ、生産性を著しく増大させたＭＲヘッドを提供
することを目的としている。SUMMARY OF THE INVENTION An object of the present invention is to provide an MR head that eliminates the above-mentioned conventional drawbacks, improves reliability, and significantly increases productivity.
本発明においては上記の目的を達成するためにＭＲ素子
パターンが形成された基板と保護板とを珪酸ナトリウム
で貼り合わせ高周波誘電加熱法により接合した構造を採
用した。In order to achieve the above object, the present invention employs a structure in which a substrate on which an MR element pattern is formed and a protective plate are bonded together using sodium silicate and joined by high frequency dielectric heating.
以下、図面に示す実施例に基づいて本発明の詳細な説明
する。Hereinafter, the present invention will be described in detail based on embodiments shown in the drawings.
図は本発明の一実施例を説明するもので、図において符
号１で示すものは基板で、その側面にはＭＲ素子パター
ン１ａが形成されている。符号２で示すものは保護板で
、この保護板２に珪酸ナトリウムを塗布して接着が行な
われる。The figure explains one embodiment of the present invention. In the figure, the reference numeral 1 indicates a substrate, and an MR element pattern 1a is formed on the side surface of the substrate. Reference numeral 2 indicates a protective plate, and the protective plate 2 is coated with sodium silicate for adhesion.
珪酸ナトリウムの濃度は４０±２重量％で珪酸ナトリウ
ム自身の組成でＳｉＯ２／Ｎａ２Ｏのモル比は２７〜３
１とされている。The concentration of sodium silicate is 40 ± 2% by weight, and the composition of sodium silicate itself has a molar ratio of SiO2/Na2O of 27 to 3.
It is said to be 1.
濃度が４０±２重量−未満となると、バインダーとして
の作用が不十分となり、４０±２重量−以上と−なると
耐水性が悪く、さらにこの濃度範囲外では加熱硬化時に
発泡が生じ、機械的強度が低下し、ＭＲヘッドの性能を
著しく低下させることになる。If the concentration is less than 40±2% by weight, its action as a binder will be insufficient, if it is more than 40±2% by weight, water resistance will be poor, and if the concentration is outside this range, foaming will occur during heat curing, resulting in poor mechanical strength. This results in a significant deterioration in the performance of the MR head.
また、前述したモル比の範囲外の領域でも加熱硬化時に
発泡が生じ、機械的強度が低下し、ＭＲヘッドの信頼性
をそこなうことになる。Furthermore, foaming occurs during heat curing even in a region outside the above-mentioned molar ratio range, resulting in a decrease in mechanical strength and impairing the reliability of the MR head.
珪酸ナトリウムを用いて貼り合わせした試料は高周波誘
電加熱法により珪酸ナトリウムを加熱硬化させて接着さ
せる。The samples bonded together using sodium silicate are bonded by heating and hardening the sodium silicate using a high-frequency dielectric heating method.
この方法は珪酸ナトリウム中に含まれている水分の損失
係数が基板材料のガラスやＭＲ素子の金属材料と比較し
て２〜４桁大きいのを考えて、選択加熱接着が可能で、
基板を加熱することなく接着剤の硬化を行なえるために
利用した。This method allows for selective heating bonding, taking into account that the loss coefficient of water contained in sodium silicate is two to four orders of magnitude larger than that of glass as a substrate material or metal material of an MR element.
This was used to cure the adhesive without heating the substrate.
加熱炉としては例えば電子レンジの様な金属性箱型オー
ブンが利用できる。周波数は均一加熱を考慮して３０〜
１００ＭＨｚに設定して使用する。As the heating furnace, for example, a metal box oven such as a microwave oven can be used. The frequency is 30~ considering uniform heating.
Use it by setting it to 100MHz.
この高周波誘電加熱法により珪酸ナトリウムを硬化させ
ると、次のような利点がある。Curing sodium silicate by this high-frequency dielectric heating method has the following advantages.
（１）被加熱物が一様に発熱体となり加熱の均一性が得
易い。(1) The object to be heated becomes a uniform heating element, making it easier to achieve uniform heating.
（２）加熱の制御が比較的容易で加熱時間を短縮できる
。(2) Heating is relatively easy to control and heating time can be shortened.
この結果耐熱性、接着性、硬度、機械的強度等の全ての
点ですぐれた接着部を形成でき、ガラス等の無機材料や
金属板等の接着剤として有効（１用いることができる。As a result, a bond can be formed that is excellent in all aspects such as heat resistance, adhesiveness, hardness, and mechanical strength, and can be used effectively as an adhesive for inorganic materials such as glass and metal plates.
以上の説明から明らかなように本発明によればＭＲ素子
パターンを形成した基板と保護基板とを珪酸ナトリウム
によって貼り合わせ、高周波誘電加熱法によりこれを硬
化させた構造を採用しているため選択加熱ができ基板を
熱することなく、しかも均一に短時間で加熱接着が行な
え、生産性（二すぐれ、耐摩耗性、耐熱性、接着強度に
すぐれ、信頼性を向上させたＭＲヘッドを得ることがで
きる。As is clear from the above description, according to the present invention, a substrate on which an MR element pattern is formed and a protective substrate are bonded together using sodium silicate, and this is cured by high-frequency dielectric heating, so that selective heating is possible. It is possible to heat bond uniformly and in a short time without heating the substrate, and it is possible to obtain an MR head with excellent productivity (two-excellent), excellent abrasion resistance, heat resistance, adhesive strength, and improved reliability. can.
図は本発明が適用されるＭＲヘッドの基板と保護板との
貼り合わせ方法を説明する斜視図である。The figure is a perspective view illustrating a method of bonding a substrate and a protection plate of an MR head to which the present invention is applied.
Claims (2)
た基板と保護板とを珪酸ナトリウムを介して貼り合わせ
、高周波誘電加熱法により接着したことを特徴とする磁
気抵抗効果型磁気ヘッド。(1) A magnetoresistive magnetic head characterized in that a substrate on which a magnetoresistive element thin film is deposited in a predetermined pattern and a protective plate are bonded together via sodium silicate and bonded by high-frequency dielectric heating.
珪酸ナトリウムの組成で５ｉ０２／Ｎａ２Ｏのモル比２
．７〜３．１ としたことを特徴とする特許請求の範
囲第１項記載の磁気抵抗効果型磁気ヘッド。(2) silicic acid) IJium concentration is 40 ± 2% by weight,
In the composition of sodium silicate, the molar ratio of 5i02/Na2O is 2
．． 7 to 3.1. The magnetoresistive magnetic head according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13848082A JPS5930222A (en) | 1982-08-11 | 1982-08-11 | Magneto-resistance effect type magnetic head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13848082A JPS5930222A (en) | 1982-08-11 | 1982-08-11 | Magneto-resistance effect type magnetic head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5930222A true JPS5930222A (en) | 1984-02-17 |
Family
ID=15223053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13848082A Pending JPS5930222A (en) | 1982-08-11 | 1982-08-11 | Magneto-resistance effect type magnetic head |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5930222A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61209348A (en) * | 1985-03-14 | 1986-09-17 | Nippon Mining Co Ltd | Humidity sensor |
| JPS61262648A (en) * | 1985-05-17 | 1986-11-20 | Nippon Mining Co Ltd | Humidity sensor |
-
1982
- 1982-08-11 JP JP13848082A patent/JPS5930222A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61209348A (en) * | 1985-03-14 | 1986-09-17 | Nippon Mining Co Ltd | Humidity sensor |
| JPS61262648A (en) * | 1985-05-17 | 1986-11-20 | Nippon Mining Co Ltd | Humidity sensor |
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