JPH03104002A - Magnetic memory device - Google Patents
Magnetic memory deviceInfo
- Publication number
- JPH03104002A JPH03104002A JP1239963A JP23996389A JPH03104002A JP H03104002 A JPH03104002 A JP H03104002A JP 1239963 A JP1239963 A JP 1239963A JP 23996389 A JP23996389 A JP 23996389A JP H03104002 A JPH03104002 A JP H03104002A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- recording medium
- head
- recording
- thin film
- 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 claims abstract description 24
- 239000006247 magnetic powder Substances 0.000 claims abstract description 5
- 230000035699 permeability Effects 0.000 claims abstract description 5
- 230000001747 exhibiting effect Effects 0.000 claims 2
- 230000005415 magnetization Effects 0.000 claims 2
- 238000006243 chemical reaction Methods 0.000 claims 1
- 239000000843 powder Substances 0.000 abstract description 10
- 229910000889 permalloy Inorganic materials 0.000 abstract description 7
- 239000000758 substrate Substances 0.000 abstract description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 abstract description 4
- 229910052782 aluminium Inorganic materials 0.000 abstract description 4
- 239000011347 resin Substances 0.000 abstract description 2
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011248 coating agent Substances 0.000 abstract 1
- 238000000576 coating method Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 229910006297 γ-Fe2O3 Inorganic materials 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 5
- 229910000859 α-Fe Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 229910001566 austenite Inorganic materials 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
Landscapes
- Paints Or Removers (AREA)
- Magnetic Record Carriers (AREA)
- 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〕
本発明は薄膜ヘッドの特性を十分に発揮させる磁気記録
媒体に関する．
〔従来の技術〕
従来の磁気記憶装置にはＭｎ−ＺｎフェライトやＮｉ−
Ｚｎフェライトなどのフエライト材で作られた磁気ヘッ
ドが用いられていた．しかし、近年になって、記録再生
特性が優れているとの理由でバーマロイ等で代表される
磁性薄膜により磁気回路を形或した薄膜磁気ヘッドが使
用されている。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic recording medium that fully exhibits the characteristics of a thin film head. [Prior art] Conventional magnetic storage devices include Mn-Zn ferrite and Ni-
Magnetic heads made of ferrite materials such as Zn ferrite were used. However, in recent years, thin film magnetic heads in which the magnetic circuit is formed of a magnetic thin film such as vermalloy have been used because of their excellent recording and reproducing characteristics.
薄膜磁気ヘッドが記録時に記録媒体側につくる記録磁界
の強さは、薄膜磁気ヘッド先端部の形状に強く依存する
ため、薄膜磁気ヘッドの先端部形状に種々の工夫がなさ
れている。その一例として特開昭５８−１３７１２０号
公報が挙げられる。Since the strength of the recording magnetic field that a thin film magnetic head creates on the recording medium side during recording strongly depends on the shape of the tip of the thin film magnetic head, various improvements have been made to the shape of the tip of the thin film magnetic head. An example of this is JP-A-58-137120.
これはギャップ部両側にある磁性薄膜の片側をもう一方
より厚くして記録磁界を強くするものである．
〔発明が解決しようとする課題〕
上記従来技術による改良は主に薄膜磁気ヘッドにおける
改良，すなわち磁気記録媒体に対する記録磁界強さを強
くするものであり、磁気ヘッド以外の改良ではない。This is done by making one side of the magnetic thin film on both sides of the gap thicker than the other to make the recording magnetic field stronger. [Problems to be Solved by the Invention] The improvements made by the above-mentioned prior art are mainly improvements in the thin film magnetic head, that is, improvements in the strength of the recording magnetic field for the magnetic recording medium, and are not improvements in anything other than the magnetic head.
本発明の目的は、新規な磁気記録媒体とともに薄膜磁気
ヘッドを用いることにより，これらの相互作用を強め、
記録磁界の強い記録特性の優れた磁気記憶装置を提供す
ることにある。The purpose of the present invention is to strengthen these interactions by using a thin film magnetic head with a new magnetic recording medium.
An object of the present invention is to provide a magnetic storage device with a strong recording magnetic field and excellent recording characteristics.
本発明のさらに他の目的は、薄膜ヘッドによりリードラ
イトを行う場合に好適な磁気記録媒体を提供することに
ある。Still another object of the present invention is to provide a magnetic recording medium suitable for reading and writing using a thin film head.
上記目的は従来の磁気記録媒体にパーマロイ半分等の高
透磁率の軟磁性体を混入することにより達或される。The above object is achieved by incorporating a soft magnetic material of high magnetic permeability, such as half permalloy, into a conventional magnetic recording medium.
本発明の原理を、第１図を用いて説明する．第１図（ａ
）は薄膜磁気ヘッドを示し、（ｂ）は、磁気記録媒体を
示している。The principle of the present invention will be explained using FIG. Figure 1 (a
) shows a thin film magnetic head, and (b) shows a magnetic recording medium.
記録時において薄膜磁気ヘッド内に作られる磁束の大部
分はギャップ内１４を通り、ヘッド先端を通って媒体側
の記録磁界に寄与する磁束は一部のみである。これは磁
性薄１ｌＡ１２・１３の厚みが薄いため磁気回路の磁気
抵抗が高く、非磁性とはいえギャップ内１４を磁束が通
りやすいためである。このため、ヘッド先端に多くの磁
束が届くようにする、言い換えれば記録磁界を強くする
ためには，ギャップ深さを小さくする、磁性薄膜の厚み
を厚くすることが必要である。ヘッド先端部の形状を精
度良く作る必要があるのはこのためである．
本発明は、上記手段の他に，磁気記録媒体への磁気抵抗
を小さくすることによりヘッド先端に届き記録磁界に寄
与する磁束量を増加するものであり、磁気記録媒体に高
透磁率の軟磁性体を混入する。この手段は、従来の記憶
媒体に軟磁性粉を混入するという容易な変更で薄膜ヘッ
ドの記録磁界を強めることができる。すなわち、記録特
性を向上した磁気記憶装置を得ることができる。Most of the magnetic flux generated within the thin film magnetic head during recording passes through the gap 14, and only a portion of the magnetic flux passes through the head tip and contributes to the recording magnetic field on the medium side. This is because the magnetic circuit 11A 12 and 13 is thin, so the magnetic resistance of the magnetic circuit is high, and magnetic flux easily passes through the gap 14 even though it is non-magnetic. Therefore, in order to allow more magnetic flux to reach the tip of the head, in other words, to strengthen the recording magnetic field, it is necessary to reduce the gap depth and increase the thickness of the magnetic thin film. This is why it is necessary to create the shape of the tip of the head with high precision. In addition to the above-mentioned means, the present invention increases the amount of magnetic flux that reaches the tip of the head and contributes to the recording magnetic field by reducing the magnetic resistance to the magnetic recording medium. Mix the body. This means can strengthen the recording magnetic field of a thin film head by simply changing the conventional storage medium by mixing soft magnetic powder. That is, a magnetic storage device with improved recording characteristics can be obtained.
以下、本発明の一実施例を第１図を用いて詳細に説明す
る。Hereinafter, one embodiment of the present invention will be described in detail using FIG. 1.
第１図（ａ）は、薄膜ヘッドを示し、（ｂ）は磁気記録
媒体を示した図である．
第１図において、アルミ基板２２上にγ−Ｆｅ，Ｏ，粉
２３を５０Ｗｔ％，パーマロイ微粉２４を５Ｗｔ％，有
機樹脂２５を４５Ｗｔ％を或分とする磁性塗料を塗布，
加熱硬化した．さらにアルミ基板２２上の記憶媒体部厚
さが約０．５μｌとなるように研磨加工を行ない、ディ
スク状の記憶媒体を作或した。この記憶媒体と従来通り
に作られた薄膜磁気ヘッドとをディスク装置に取り付け
オーバーライト特性を測定した。表１にその結果を従来
の記憶媒体（パーマロイ微粉Ｏ％）の結果と共に示した
。同表にはパーマロイ微粉１０Ｗｔ％の記憶媒体での結
果も示した。同表より、バーマロイ微粉を添加した磁気
ディスクではオーバーライト特性が向上しており、薄膜
磁気ヘッドの記録磁界が強まっていることがわかる．
〔発明の効果〕
本発明によれば、従来の磁気記録媒体に高透磁率の軟磁
性粉を混入するという簡易な方法で、薄膜ヘッドを用い
た磁気記憶装置の記録特性を向上させるという効果があ
る。FIG. 1(a) shows a thin film head, and FIG. 1(b) shows a magnetic recording medium. In FIG. 1, a magnetic paint containing 50 Wt% of γ-Fe, O powder 23, 5 Wt% of Permalloy fine powder 24, and 45 Wt% of organic resin 25 is applied on an aluminum substrate 22.
It was heated and cured. Furthermore, polishing was performed so that the thickness of the storage medium on the aluminum substrate 22 was approximately 0.5 μl, thereby producing a disk-shaped storage medium. This storage medium and a conventionally manufactured thin film magnetic head were attached to a disk device and the overwrite characteristics were measured. The results are shown in Table 1 together with the results of the conventional storage medium (permalloy fine powder O%). The same table also shows the results for a storage medium containing 10 wt % of permalloy fine powder. From the same table, it can be seen that the overwrite characteristics of the magnetic disk containing Vermalloy fine powder are improved, and the recording magnetic field of the thin-film magnetic head is strengthened. [Effects of the Invention] According to the present invention, the recording characteristics of a magnetic storage device using a thin-film head can be improved by a simple method of mixing a soft magnetic powder with high magnetic permeability into a conventional magnetic recording medium. be.
第１図（ａ）は本発明における薄膜磁気ヘッド先端部を
示す図、第１図（ｂ）は磁気記憶媒体の断面を示す図で
ある．表１は本発明における，パーマロイ粉の含有率に
対応したオーバーライト特性を示す表である．
１１・・・薄膜磁気ヘッド先端部、１２．１３・・・磁
性薄膜、１４・・・ギャップ、２１・・・磁気記録媒体
、２ ２−・・アルミ基板、２３−ｙ−Ｆｅ，Ｏｎ粉、
２４・・・パーマロイ粉。FIG. 1(a) is a diagram showing the tip of a thin film magnetic head according to the present invention, and FIG. 1(b) is a diagram showing a cross section of a magnetic storage medium. Table 1 is a table showing overwriting characteristics corresponding to the content of permalloy powder in the present invention. DESCRIPTION OF SYMBOLS 11... Thin film magnetic head tip, 12.13... Magnetic thin film, 14... Gap, 21... Magnetic recording medium, 2 2-... Aluminum substrate, 23-y-Fe, On powder,
24... Permalloy powder.
Claims (1)
る磁気記録媒体とにより成る磁気記憶装置において、前
記磁気ヘッドとして磁性薄膜で磁気回路を構成した薄膜
磁気ヘッドを用い、前記磁気記録媒体中に高透磁性を示
す磁性粉を混入したことを特徴とする磁気記憶装置。 ２、信号を磁化の形で記憶する磁気記録媒体であって、
前記磁気記録媒体上層に高透磁性を示す磁性粉を含有さ
せたことを特徴とする磁気記録媒体。[Claims] 1. In a magnetic storage device comprising a magnetic head for electromagnetic conversion and a magnetic recording medium for storing signals in the form of magnetization, the magnetic head is a thin-film magnetic head in which a magnetic circuit is formed of a magnetic thin film. 1. A magnetic storage device characterized in that a magnetic powder exhibiting high magnetic permeability is mixed into the magnetic recording medium. 2. A magnetic recording medium that stores signals in the form of magnetization,
A magnetic recording medium characterized in that the upper layer of the magnetic recording medium contains magnetic powder exhibiting high magnetic permeability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1239963A JPH03104002A (en) | 1989-09-18 | 1989-09-18 | Magnetic memory device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1239963A JPH03104002A (en) | 1989-09-18 | 1989-09-18 | Magnetic memory device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH03104002A true JPH03104002A (en) | 1991-05-01 |
Family
ID=17052440
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1239963A Pending JPH03104002A (en) | 1989-09-18 | 1989-09-18 | Magnetic memory device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH03104002A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2367261A2 (en) | 2010-03-17 | 2011-09-21 | Shin-Kobe Electric Machinery Co., Ltd. | Direct-current power source apparatus |
-
1989
- 1989-09-18 JP JP1239963A patent/JPH03104002A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2367261A2 (en) | 2010-03-17 | 2011-09-21 | Shin-Kobe Electric Machinery Co., Ltd. | Direct-current power source apparatus |
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