KR920013284A - 자기 기록 매체 - Google Patents
자기 기록 매체 Download PDFInfo
- Publication number
- KR920013284A KR920013284A KR1019910024719A KR910024719A KR920013284A KR 920013284 A KR920013284 A KR 920013284A KR 1019910024719 A KR1019910024719 A KR 1019910024719A KR 910024719 A KR910024719 A KR 910024719A KR 920013284 A KR920013284 A KR 920013284A
- Authority
- KR
- South Korea
- Prior art keywords
- magnetic recording
- outermost layer
- recording medium
- less
- coercive force
- Prior art date
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
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
-
- 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
-
- 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
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/714—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by the dimension of the magnetic particles
-
- 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
- G11B5/68—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent
- G11B5/70—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer
- G11B5/716—Record carriers characterised by the selection of the material comprising one or more layers of magnetisable material homogeneously mixed with a bonding agent on a base layer characterised by two or more magnetic 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
- G11B5/62—Record carriers characterised by the selection of the material
- G11B5/73—Base layers, i.e. all non-magnetic layers lying under a lowermost magnetic recording layer, e.g. including any non-magnetic layer in between a first magnetic recording layer and either an underlying substrate or a soft magnetic underlayer
- G11B5/739—Magnetic recording media substrates
- G11B5/73923—Organic polymer substrates
- G11B5/73927—Polyester substrates, e.g. polyethylene terephthalate
Landscapes
- Magnetic Record Carriers (AREA)
- Paints Or Removers (AREA)
- Manufacturing Of Magnetic Record Carriers (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 자기 기록 매체의 한 예의 단면도, 제2도는 자기 기록 매체의 다른 예의 단면도, 제3도는 자기 기록 매체의 제조 장치의 개략도
Claims (6)
- 비자성 지지체 상에 복수의 층이 적충되어 있고, 이들 층 중의 최외층이 평균 장축 길이가 250mm이하이며 평균 X-선 측정 입경에 대한 평균 장축 길이의 비가 12미만인 금속 자성 분발을 함유하고 있는 자기 기록 매체.
- 제1항에 있어서, 최외층 이외의 적어도 1층이 코발트 및 FeOx(단, 1.33x≤1.5)를 함유하는 자성 분말로 이루어짐을 특징으로 하는 자기 기록 매체.
- 제1항에 있어서, 최외층의 두께가 ㎛미만임을 특징으로 하는 자기 기록 매체.
- 제2항에 있어서, 최외층의 보자력이 1600 Oe를 초과함을 특징으로 하는 자기 기록 매체.
- 제4항에 있어서, 최외층의 보자력이 1700 Oe를 초과함을 특징으로 하는 자기 기록 매체.
- 제5항에 있어서, 최외층의 보자력이 1700 Oe를 초과하고 2200Oe이하임을 특징으로 하는 자기 기록 매체.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP90-417542 | 1990-12-28 | ||
JP2417542A JPH04251434A (ja) | 1990-12-28 | 1990-12-28 | 磁気記録媒体 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR920013284A true KR920013284A (ko) | 1992-07-28 |
KR100288348B1 KR100288348B1 (ko) | 2001-05-02 |
Family
ID=18525631
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019910024719A KR100288348B1 (ko) | 1990-12-28 | 1991-12-27 | 자기기록매체 |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0493114B1 (ko) |
JP (1) | JPH04251434A (ko) |
KR (1) | KR100288348B1 (ko) |
DE (1) | DE69118671T2 (ko) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0566378B2 (en) † | 1992-04-14 | 2001-05-09 | Konica Corporation | Magnetic recording medium |
JP3474706B2 (ja) * | 1996-06-10 | 2003-12-08 | 富士写真フイルム株式会社 | 磁気ディスク及び磁気記録再生方法 |
DE19838799A1 (de) * | 1998-08-26 | 2000-03-02 | Emtec Magnetics Gmbh | Magnetischer Aufzeichnungsträger mit hoher Aufzeichnungsdichte |
US6746508B1 (en) | 1999-10-22 | 2004-06-08 | Chrysalis Technologies Incorporated | Nanosized intermetallic powders |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4851289A (en) * | 1987-01-30 | 1989-07-25 | Fuji Photo Film Co., Ltd. | Magnetic recording medium |
JPH0690786B2 (ja) | 1987-01-30 | 1994-11-14 | 富士写真フイルム株式会社 | 磁気記録媒体 |
-
1990
- 1990-12-28 JP JP2417542A patent/JPH04251434A/ja active Pending
-
1991
- 1991-12-24 EP EP91312017A patent/EP0493114B1/en not_active Revoked
- 1991-12-24 DE DE69118671T patent/DE69118671T2/de not_active Revoked
- 1991-12-27 KR KR1019910024719A patent/KR100288348B1/ko not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
DE69118671D1 (de) | 1996-05-15 |
DE69118671T2 (de) | 1996-10-31 |
JPH04251434A (ja) | 1992-09-07 |
EP0493114B1 (en) | 1996-04-10 |
EP0493114A3 (en) | 1993-04-21 |
EP0493114A2 (en) | 1992-07-01 |
KR100288348B1 (ko) | 2001-05-02 |
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A201 | Request for examination | ||
AMND | Amendment | ||
E902 | Notification of reason for refusal | ||
AMND | Amendment | ||
E601 | Decision to refuse application | ||
J201 | Request for trial against refusal decision | ||
AMND | Amendment | ||
B601 | Maintenance of original decision after re-examination before a trial | ||
J301 | Trial decision |
Free format text: TRIAL DECISION FOR APPEAL AGAINST DECISION TO DECLINE REFUSAL REQUESTED 19990731 Effective date: 20001031 |
|
S901 | Examination by remand of revocation | ||
GRNO | Decision to grant (after opposition) | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20070125 Year of fee payment: 7 |
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LAPS | Lapse due to unpaid annual fee |