DE4091977T - - Google Patents

Info

Publication number: DE4091977T
Authority: DE; Germany
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 Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.): Withdrawn

Application number

DE19904091977

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.)

1989-10-27

Filing date

1990-10-26

Publication date

1991-10-10

1990-03-23 Priority claimed from JP7392590A external-priority patent/JPH0719372B2/ja

1990-03-23 Priority claimed from JP7392490A external-priority patent/JPH03205616A/ja

1990-03-23 Priority claimed from JP7392690A external-priority patent/JPH03273528A/ja

1990-10-26 Application filed filed Critical

1991-10-10 Publication of DE4091977T publication Critical patent/DE4091977T/de

Status Withdrawn legal-status Critical Current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
- G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
- G11B5/65—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition
- G11B5/656—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent characterised by its composition 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
- G11B5/73—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
- G11B5/7368—Non-polymeric layer under the lowermost magnetic recording layer
- G11B5/7373—Non-magnetic single underlayer comprising chromium
- 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
- 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
- G11B5/84—Processes or apparatus specially adapted for manufacturing record carriers
- 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
- Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10S428/00—Stock material or miscellaneous articles
- Y10S428/922—Static electricity metal bleed-off metallic stock
- Y10S428/9265—Special properties
- Y10S428/928—Magnetic property

DE19904091977 1989-10-27 1990-10-26 Withdrawn DE4091977T (de)

Applications Claiming Priority (4)

Application Number	Priority Date	Filing Date	Title
JP28048089		1989-10-27
JP7392590A JPH0719372B2 (ja)	1990-03-23	1990-03-23	磁気記録媒体の製造方法
JP7392490A JPH03205616A (ja)	1989-10-27	1990-03-23	磁気記録媒体の製造方法
JP7392690A JPH03273528A (ja)	1990-03-23	1990-03-23	磁気ディスクの製造方法

Publications (1)

Publication Number	Publication Date
DE4091977T true DE4091977T (de)	1991-10-10

Family

ID=27465639

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DE19904091977 Withdrawn DE4091977T (de)	1989-10-27	1990-10-26

Country Status (4)

Country	Link
US (1)	US5252367A (de)
DE (1)	DE4091977T (de)
GB (1)	GB2245599B (de)
WO (1)	WO1991006948A1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH03242983A (ja) *	1990-02-06	1991-10-29	Internatl Business Mach Corp <Ibm>	磁気構造体の製造方法
GB2254620B (en) *	1991-03-25	1994-10-05	Kobe Steel Ltd	Manufacturing method of magnetic disk
GB9126207D0 (en) *	1991-12-10	1992-02-12	Nat Res Dev	Magnetostrictive material
DE69233233T2 (de) *	1991-12-27	2004-08-26	Honeywell International Inc.	Anordnung mehrschichtiger Filmmaterialien
US5492775A (en) *	1993-05-28	1996-02-20	International Business Machines Corporation	Barium ferrite thin film for longitudinal recording
US5746951A (en) *	1994-02-28	1998-05-05	Nisshinbo Industries, Inc.	Process for production of magnetic recording medium
EP0817174A1 (de) *	1995-03-08	1998-01-07	TAKAHASHI, Migaku	Magnetisches aufzeichnungsmedium und verfahren zu seiner herstellung
ATA119098A (de) *	1998-07-09	1999-05-15	Ims Ionen Mikrofab Syst	Verfahren zur erzeugung eines kohlenstoffilmes auf einem substrat
US20030059604A1 (en)	2001-09-05	2003-03-27	Fuji Photo Film Co., Ltd.	Material coated with dispersion of ferromagnetic nanoparticles, and magnetic recording medium using the material
JP4524078B2 (ja) *	2002-05-31	2010-08-11	富士フイルム株式会社	磁性粒子およびその製造方法、並びに、磁気記録媒体およびその製造方法
JP4179922B2 (ja) *	2002-07-03	2008-11-12	富士フイルム株式会社	磁気記録媒体及びその製造方法
JP2004165630A (ja) *	2002-10-21	2004-06-10	Fuji Photo Film Co Ltd	磁性粒子塗布物、磁性粒子塗布物の製造方法、磁気記録媒体、電磁シールド材
EP1477968B1 (de) *	2003-05-13	2007-09-26	FUJIFILM Corporation	Verfahren zur Herstellung magnetischen Aufzeichnungsmittels
US20070111036A1 (en) *	2005-11-16	2007-05-17	Masaru Ito	Substrate for magnetic recording medium and fabrication method thereof
WO2020032146A1 (ja) *	2018-08-07	2020-02-13	Hoya株式会社	磁気ディスク用基板及び磁気ディスク

Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3837724A1 (de) *	1987-11-07	1989-06-01	Kobe Steel Ltd	Kohlenstoffmaterial und verfahren zu seiner herstellung

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPS62234232A (ja) *	1986-04-04	1987-10-14	Hitachi Ltd	磁気デイスク基板およびその製造方法

1990
- 1990-10-26 DE DE19904091977 patent/DE4091977T/de not_active Withdrawn
- 1990-10-26 WO PCT/JP1990/001386 patent/WO1991006948A1/ja active Application Filing
- 1990-10-26 US US07/688,555 patent/US5252367A/en not_active Expired - Fee Related
1991
- 1991-05-02 GB GB9109659A patent/GB2245599B/en not_active Expired - Fee Related

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
DE3837724A1 (de) *	1987-11-07	1989-06-01	Kobe Steel Ltd	Kohlenstoffmaterial und verfahren zu seiner herstellung

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Patents Abstracts of Japan 1-256017 (A) *

Also Published As

Publication number	Publication date
GB2245599A (en)	1992-01-08
GB2245599B (en)	1993-08-04
US5252367A (en)	1993-10-12
GB9109659D0 (en)	1991-07-24
WO1991006948A1 (en)	1991-05-16

Legal Events

Date	Code	Title	Description
1997-01-23	8110	Request for examination paragraph 44
2003-08-07	8139	Disposal/non-payment of the annual fee

Publication	Publication Date	Title
DE8905585U1 (de)	1989-06-29
DE4091977T (de)	1991-10-10
DE8903154U1 (de)	1989-06-22
DE8901603U1 (de)	1989-03-30
DE8902256U1 (de)	1989-07-06
DE8901613U1 (de)	1989-05-11
DE8904398U1 (de)	1990-08-09
DE8902081U1 (de)	1989-06-01
DE8904527U1 (de)	1989-11-30
DE8903520U1 (de)	1989-05-11
DE8904833U1 (de)	1989-08-17
DE8900993U1 (de)	1989-03-30
DE8906494U1 (de)	1990-03-22
DE8902358U1 (de)	1989-05-11
DE8901082U1 (de)	1989-06-15
DE8900737U1 (de)	1989-05-24
DE8904710U1 (de)	1990-08-09
DE8902315U1 (de)	1989-04-20
DE8902977U1 (de)	1989-06-15
DE8902786U1 (de)	1989-05-03
DE8902618U1 (de)	1989-05-11
DE8901896U1 (de)	1989-04-06
DE8902087U1 (de)	1989-04-06
DE8903393U1 (de)	1989-06-01
DE8903000U1 (de)	1989-06-29