KR860002785A - Magnetic recording media - Google Patents

Magnetic recording media Download PDF

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Publication number
KR860002785A
KR860002785A KR1019840005664A KR840005664A KR860002785A KR 860002785 A KR860002785 A KR 860002785A KR 1019840005664 A KR1019840005664 A KR 1019840005664A KR 840005664 A KR840005664 A KR 840005664A KR 860002785 A KR860002785 A KR 860002785A
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KR
South Korea
Prior art keywords
magnetic
layer
magnetic layer
magnetic recording
thickness
Prior art date
Application number
KR1019840005664A
Other languages
Korean (ko)
Other versions
KR910008676B1 (en
Inventor
사도루 야마구지 (외 3)
Original Assignee
나가이 아쯔시
히다찌마구세루 가부시기 가이샤
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 나가이 아쯔시, 히다찌마구세루 가부시기 가이샤 filed Critical 나가이 아쯔시
Priority to KR1019840005664A priority Critical patent/KR910008676B1/en
Publication of KR860002785A publication Critical patent/KR860002785A/en
Application granted granted Critical
Publication of KR910008676B1 publication Critical patent/KR910008676B1/en

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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
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature

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  • Magnetic Record Carriers (AREA)

Abstract

내용 없음No content

Description

자기 기록 매체Magnetic recording media

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제 1도는 자성 분말의 평균 단일 입자 지름과 노이즈 레벨과의 관계도.1 is a relationship between the average single particle diameter of the magnetic powder and the noise level.

제 2도는 자성 분말의 평균 단일 입자 지름과 충진도와의 관계도.2 is a relationship between the average single particle diameter and the filling degree of the magnetic powder.

제 3도는 보자력과 소거율과의 관계도.3 is a relation between coercive force and elimination rate.

Claims (2)

기판 위에 평균 단일 입자 지름(장축 지름)이 0.4∼0.7μ의 자성 분말을 포함하는 제1의 자성층을 형성하고, 또한 그위에 평균 단일 입자 지름(장축 지름)이 0.15∼0.35μ의 자성 분말을 포함하는 보자력이 370∼460에루스데드의 제2의 자성층을 중층 형성하여, 상하 양 자성층의 보자력의 비를 상층의 제2 자성층의 보자력/하층의 제1의 자성층의 보자력으로 1.05∼1.5로 하는 것을 특징으로 하는 자기 기록매체.A first magnetic layer comprising a magnetic powder having an average single particle diameter (long axis diameter) of 0.4 to 0.7 mu is formed on a substrate, and thereon also a magnetic powder having an average single particle diameter (long axis diameter) of 0.15 to 0.35 mu The coercive force of the second magnetic layer of 370 to 460 Erusade forms a middle layer, and the ratio of the coercive forces of the upper and lower magnetic layers is 1.05 to 1.5 as the coercive force of the second magnetic layer of the upper layer and the coercive force of the first magnetic layer of the lower layer. Magnetic recording medium. 상하 양자성층의 두께의 비가 상층의 제2자성층의 두께/하층의 제1의 자성층의 두께로 3/7∼6/5의 범위내에 있는 특허청구의 범위 제1항 기재의 자기 기록매체.The magnetic recording medium according to claim 1, wherein a ratio of the thickness of the upper and lower quantum layers is within the range of 3/7 to 6/5 in the thickness of the upper magnetic layer and the thickness of the lower magnetic layer. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019840005664A 1984-09-17 1984-09-17 Maghnetic memory medium KR910008676B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019840005664A KR910008676B1 (en) 1984-09-17 1984-09-17 Maghnetic memory medium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019840005664A KR910008676B1 (en) 1984-09-17 1984-09-17 Maghnetic memory medium

Publications (2)

Publication Number Publication Date
KR860002785A true KR860002785A (en) 1986-04-30
KR910008676B1 KR910008676B1 (en) 1991-10-19

Family

ID=19235415

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019840005664A KR910008676B1 (en) 1984-09-17 1984-09-17 Maghnetic memory medium

Country Status (1)

Country Link
KR (1) KR910008676B1 (en)

Also Published As

Publication number Publication date
KR910008676B1 (en) 1991-10-19

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