KR880004439A - 자기 기록 매체 - Google Patents
자기 기록 매체 Download PDFInfo
- Publication number
- KR880004439A KR880004439A KR870010497A KR870010497A KR880004439A KR 880004439 A KR880004439 A KR 880004439A KR 870010497 A KR870010497 A KR 870010497A KR 870010497 A KR870010497 A KR 870010497A KR 880004439 A KR880004439 A KR 880004439A
- Authority
- KR
- South Korea
- Prior art keywords
- magnetic
- magnetic recording
- recording media
- flux density
- gauss
- Prior art date
Links
- 230000004907 flux Effects 0.000 claims description 2
- 239000000696 magnetic material Substances 0.000 claims description 2
- 239000006249 magnetic particle Substances 0.000 claims 3
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims 2
- 239000010941 cobalt Substances 0.000 claims 1
- 229910017052 cobalt Inorganic materials 0.000 claims 1
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 3
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
-
- 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
- G11B5/706—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 composition of the magnetic material
- G11B5/70626—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 composition of the magnetic material containing non-metallic substances
- G11B5/70642—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 composition of the magnetic material containing non-metallic substances iron oxides
- G11B5/70652—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 composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3
- G11B5/70668—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 composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant
- G11B5/70673—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 composition of the magnetic material containing non-metallic substances iron oxides gamma - Fe2 O3 containing a dopant containing Co
-
- 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
-
- 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
-
- 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
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
- Y10T428/256—Heavy metal or aluminum or compound thereof
- Y10T428/257—Iron oxide or aluminum oxide
Landscapes
- Magnetic Record Carriers (AREA)
- Paints Or Removers (AREA)
Abstract
내용 없음
Description
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 각종 자기 테이프의 특성과 화질과의 관계를 도시하는 도면.
제2도는 자기 테이프에 도포되는 자성체의 항자력에 대한 캐리어 출력 노이즈비와 최적 기록 전류와의 관계를 도시하는 도면.
제3도는 자성체의 잔류 자속 밀도에 대한 캐리어 출력 노이즈비의 관계를 도시하는 도면.
Claims (2)
- 베이스 필름위에 형성된 자성층의 항자력이 750Oe내지 980Oe의 범위에 있으며, 또한 잔류 자속 밀도가 1250 가우스 이상이며, 또한 이 자성층을 구성하는 자성 입자의 자성입자 길이가 0.2㎛이하인 것을 특징으로 하는 자기 기록 매체.
- 제1항에 있어서, 이 자성 입자가 코발트를 첨가 혹은 피착한 산화철 자성체임을 특징으로 하는 자기 기록매체.※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP61224293A JPS6379232A (ja) | 1986-09-22 | 1986-09-22 | 磁気記録媒体 |
JP224293 | 1986-09-22 |
Publications (2)
Publication Number | Publication Date |
---|---|
KR880004439A true KR880004439A (ko) | 1988-06-04 |
KR920001570B1 KR920001570B1 (ko) | 1992-02-18 |
Family
ID=16811501
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1019870010497A KR920001570B1 (ko) | 1986-09-22 | 1987-09-22 | 자기 기록 매체 |
Country Status (5)
Country | Link |
---|---|
US (1) | US4863795A (ko) |
EP (1) | EP0261944B1 (ko) |
JP (1) | JPS6379232A (ko) |
KR (1) | KR920001570B1 (ko) |
DE (2) | DE261944T1 (ko) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04246475A (ja) * | 1991-01-31 | 1992-09-02 | Daikin Ind Ltd | 磁性塗料の製造方法 |
CA2111172A1 (en) * | 1993-09-23 | 1995-03-24 | Dennis S. Everhart | Nonwoven fabric formed from alloy fibers |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3865627A (en) * | 1972-05-22 | 1975-02-11 | Minnesota Mining & Mfg | Magnetic recording medium incorporating fine acicular iron-based particles |
NL7902902A (nl) * | 1978-04-17 | 1979-10-19 | Montedison Spa | Werkwijze ter bereiding van magnetische poeders op basis van gamma-fe203, de aldus verkregen poeders en magnetische banden, die deze poeders bevatten. |
JPS5677926A (en) * | 1979-11-28 | 1981-06-26 | Tdk Corp | Magnetic recording medium using cobalt adhesion type iron oxide |
JPS5752106A (en) * | 1980-09-11 | 1982-03-27 | Tdk Corp | Magnetic powder for magnetic recording |
JPS57183627A (en) * | 1981-05-07 | 1982-11-12 | Fuji Photo Film Co Ltd | Magnetic recording medium |
JPS5852806A (ja) * | 1981-09-24 | 1983-03-29 | Hitachi Maxell Ltd | 磁気記録媒体 |
JPS5852804A (ja) * | 1981-09-24 | 1983-03-29 | Hitachi Maxell Ltd | 磁気記録媒体 |
JPS5852805A (ja) * | 1981-09-24 | 1983-03-29 | Hitachi Maxell Ltd | 磁気記録媒体 |
US4657816A (en) * | 1982-04-19 | 1987-04-14 | Memorex Corporation | Ferromagnetic recording materials |
JPS595424A (ja) * | 1982-07-01 | 1984-01-12 | Sony Corp | 磁気記録媒体 |
JPS60111329A (ja) * | 1983-11-21 | 1985-06-17 | Fuji Photo Film Co Ltd | 磁気記録媒体 |
DE3413752A1 (de) * | 1984-04-12 | 1985-10-24 | Basf Ag, 6700 Ludwigshafen | Verfahren zur herstellung isotroper magnetischer, kobalthaltiger eisenoxide |
-
1986
- 1986-09-22 JP JP61224293A patent/JPS6379232A/ja active Pending
-
1987
- 1987-09-21 US US07/099,067 patent/US4863795A/en not_active Expired - Lifetime
- 1987-09-22 EP EP87308404A patent/EP0261944B1/en not_active Expired - Lifetime
- 1987-09-22 DE DE198787308404T patent/DE261944T1/de active Pending
- 1987-09-22 KR KR1019870010497A patent/KR920001570B1/ko not_active IP Right Cessation
- 1987-09-22 DE DE3789649T patent/DE3789649T2/de not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DE3789649D1 (de) | 1994-05-26 |
EP0261944A3 (en) | 1989-11-29 |
KR920001570B1 (ko) | 1992-02-18 |
EP0261944A2 (en) | 1988-03-30 |
EP0261944B1 (en) | 1994-04-20 |
DE261944T1 (de) | 1988-09-01 |
DE3789649T2 (de) | 1994-08-04 |
US4863795A (en) | 1989-09-05 |
JPS6379232A (ja) | 1988-04-09 |
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E902 | Notification of reason for refusal | ||
G160 | Decision to publish patent application | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant | ||
FPAY | Annual fee payment |
Payment date: 20061229 Year of fee payment: 16 |
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EXPY | Expiration of term |