JPS58208935A - Magnetic recording medium - Google Patents

Magnetic recording medium

Info

Publication number
JPS58208935A
JPS58208935A JP57090820A JP9082082A JPS58208935A JP S58208935 A JPS58208935 A JP S58208935A JP 57090820 A JP57090820 A JP 57090820A JP 9082082 A JP9082082 A JP 9082082A JP S58208935 A JPS58208935 A JP S58208935A
Authority
JP
Japan
Prior art keywords
layer
oxide
ferromagnetic
magnetic recording
recording medium
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
Application number
JP57090820A
Other languages
Japanese (ja)
Inventor
Soichi Matsuzaki
松崎　壮一
Minoru Osada
実 長田
Seiji Yasui
政治 安井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Lincstech Circuit Co Ltd
Original Assignee
Hitachi Condenser Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Condenser Co Ltd filed Critical Hitachi Condenser Co Ltd
Priority to JP57090820A priority Critical patent/JPS58208935A/en
Publication of JPS58208935A publication Critical patent/JPS58208935A/en
Pending legal-status Critical Current

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
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/72—Protective coatings, e.g. anti-static or antifriction

Abstract

PURPOSE:To prevent oxidation of a ferromagnetic metal layer, clogging of a magnetic head with the peeled oxidation product, and deterioration of saturation magnetization, by forming the ferromagnetic layer on a base, and a ferromagnetic metallic oxide layer as a protective layer on the surface of this layer. CONSTITUTION:The ferromagnetic metallic layer 2 is formed on a base 1 of plastic film, and the layer 3 of ferromagnetic metallic oxide such as cobalt oxide and nickel oxide is formed on the layer 2 by a vacuum vapor deposition method to protect the layer 2. The oxide layer 3 of high peeling strength thus obtained prevents the oxide produced by oxygen, etc. in the air during the use of the layer 2 and easily peeled off by friction with the magnetic head, from clogging the head, and it also prevents deterioration of saturation magnetization. Hence, a magnetic recording medium superior in durability is obtained.

Description

【発明の詳細な説明】 本発明は保護層を有する磁気記録媒体に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a magnetic recording medium having a protective layer.

プラスチックフィルム等の基体に強磁性体金属な真空蒸
着法やイオンブレーティング法等によって斜めに付着さ
せた磁気記録媒体は、一般に抗磁力や角形化、磁気記録
密度が共に従来の塗布型のものＩ（比べて犬ざいという
長所がある。Magnetic recording media, which are made by diagonally attaching ferromagnetic metal to a substrate such as a plastic film by vacuum evaporation or ion blating, generally have better coercive force, squareness, and magnetic recording density than conventional coated media. (In comparison, it has the advantage of being dog-friendly.

ところで、基体に設けられた強磁性体金属は空気−中に
晒されると酸化するが、酸化物が生じると飽和磁化か減
少する欠点があり、さらにこのようにして生じた酸化物
は剥離し易く、磁気へ、Ｆ等により！ＩＩ　１ｌｌｌｔ
されさらに内側の強磁性体金属が酸化され飽和磁化が益
々減少する。また、擦られた酸化物のために磁気へラド
等が目づまりを起こす欠点もあった。By the way, the ferromagnetic metal provided on the substrate oxidizes when exposed to air, but it has the disadvantage that the saturation magnetization decreases when oxides are formed, and furthermore, the oxides formed in this way are easy to peel off. , to magnetism, by F etc.! II 1llllt
Furthermore, the inner ferromagnetic metal is oxidized and the saturation magnetization further decreases. There was also the drawback that the rubbed oxide caused the magnetic helad, etc. to become clogged.

本発明は１以上の欠点を改良し２強磁性体金属層の酸化
を防止しつる磁気記録媒体の提供を目的とする。SUMMARY OF THE INVENTION It is an object of the present invention to provide a magnetic recording medium which improves one or more disadvantages and prevents oxidation of the two ferromagnetic metal layers.

本発明は、上記の目的を達成するために２強磁性体金属
層の表面に主として強磁性体金属の酸化物からなる保護
層を設けることを特徴とする磁気記録媒体を提供するも
のである。In order to achieve the above object, the present invention provides a magnetic recording medium characterized in that a protective layer mainly made of ferromagnetic metal oxide is provided on the surface of two ferromagnetic metal layers.

以下１本発明の実施例を図面に基づ（・て説明する。An embodiment of the present invention will be described below based on the drawings.

第１図（（おいて、１は厚さ６〜４０μのプラスチック
フィルムからなる基体である。２は基体１０表面に、真
空蒸着法やイオンプレーティング法。In FIG. 1, 1 is a substrate made of a plastic film with a thickness of 6 to 40 μm. 2 is a substrate 10 that is coated on the surface by vacuum evaporation or ion plating.

スハノタリング法等により鉄や二、ケル、コノ、ルト等
の強磁性体金属を斜めに付着させ形成した強磁性体金１
１である。５は強磁性体金属層２の表而ｅこ予じめブ７
’Ｊ−’Ｊ中等において設けられた１強磁性体金媚の酸
化物からなる保護層である。Ferromagnetic gold 1 formed by obliquely adhering ferromagnetic metals such as iron, ferromagnetic metal, ferromagnetic metal, ferromagnetic metal, etc. using the Suhanota ring method etc.
It is 1. 5 is the surface of the ferromagnetic metal layer 2.
'J-' This is a protective layer made of a ferromagnetic metal oxide provided in J, etc.

すなわち、予じめ強磁性体金属層２０表面に酸化フハル
トや酸化二、ケル等の酸化物の保護層３を真空蒸着法等
（・こより設けているが、このような酸化物ｌま１強磁
性体金属層２の一部が酸化したものと異なり、剥離強度
が非常−に大き−１＜、磁気へットに擦られたとしても
保護層３はほとんど制れることかなく１強磁性体金属層
２の酸化を防止でき。That is, a protective layer 3 of oxides such as Fhard oxide, dioxide, Kel oxide, etc. is previously provided on the surface of the ferromagnetic metal layer 20 by vacuum evaporation method. Unlike the part of the magnetic metal layer 2 that is oxidized, the peel strength is extremely high.Even if it is rubbed by a magnetic field, the protective layer 3 is almost unrestrained and remains a ferromagnetic material. Oxidation of the metal layer 2 can be prevented.

飽和磁化の低下を防止できる。Decrease in saturation magnetization can be prevented.

以上の通り１本発明によれば２強磁性体金属層の酸（ヒ
を防止飽和磁化の低下を防ぐことができ。As described above, according to the present invention, it is possible to prevent the acid in the ferromagnetic metal layer and to prevent the saturation magnetization from decreasing.

磁気へ、ト等による刺離を防止しつる磁気記録媒体か得
られる。A magnetic recording medium can be obtained that prevents pricking due to magnetism, etc.

【図面の簡単な説明】[Brief explanation of drawings]

図は本発明の実施例の断面図を示す。 １・・・基体、２・・・・・・強磁性体金属層。 ６・・・・・保護層。 特許出願人　日立コンデンサ株式会社 The figure shows a cross-sectional view of an embodiment of the invention. 1...Substrate, 2...Ferromagnetic metal layer. 6...Protective layer. Patent applicant: Hitachi Capacitor Co., Ltd.

Claims (1)

【特許請求の範囲】[Claims] （１）　　基体に強磁性体金属を付着した磁気記録媒体
において１強磁性体金属の表面に主として強磁性体金属
の酸化物からなる保護層を設けることを特徴とする磁気
記録媒体。(1) A magnetic recording medium having a ferromagnetic metal attached to a base, characterized in that a protective layer mainly consisting of an oxide of the ferromagnetic metal is provided on the surface of the ferromagnetic metal.
JP57090820A 1982-05-28 1982-05-28 Magnetic recording medium Pending JPS58208935A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP57090820A JPS58208935A (en) 1982-05-28 1982-05-28 Magnetic recording medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP57090820A JPS58208935A (en) 1982-05-28 1982-05-28 Magnetic recording medium

Publications (1)

Publication Number Publication Date
JPS58208935A true JPS58208935A (en) 1983-12-05

Family

ID=14009225

Family Applications (1)

Application Number Title Priority Date Filing Date
JP57090820A Pending JPS58208935A (en) 1982-05-28 1982-05-28 Magnetic recording medium

Country Status (1)

Country Link
JP (1) JPS58208935A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0180242A2 (en) * 1984-11-02 1986-05-07 Teijin Limited Magnetic recording medium, method for producing the same, and method of recording and reproduction using the same and magnetic head
US5013583A (en) * 1984-02-11 1991-05-07 Teijin Limited Method of producing a magnetic recording medium

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5013583A (en) * 1984-02-11 1991-05-07 Teijin Limited Method of producing a magnetic recording medium
EP0180242A2 (en) * 1984-11-02 1986-05-07 Teijin Limited Magnetic recording medium, method for producing the same, and method of recording and reproduction using the same and magnetic head

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