DE69104861D1 - Magnetische Aufzeichnungsträger. - Google Patents

Magnetische Aufzeichnungsträger.

Info

Publication number: DE69104861D1
Authority: DE; Germany
Prior art keywords: magnetic recording; recording media; media; magnetic; recording
Prior art date: 1990-02-13
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.): Expired - Fee Related

Application number

DE69104861T

Other languages

English (en)

Other versions

DE69104861T2 (de

Inventor

Hideo Hatanaka

Masaru Higashionji

Hideaki Mukae

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.)

Panasonic Holdings Corp

Original Assignee

Matsushita Electric Industrial 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.)

1990-02-13

Filing date

1991-02-11

Publication date

1994-12-08

1990-02-13 Priority claimed from JP2032067A external-priority patent/JP2945696B2/ja

1990-06-11 Priority claimed from JP2153197A external-priority patent/JP2667040B2/ja

1991-02-11 Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd

1994-12-08 Application granted granted Critical

1994-12-08 Publication of DE69104861D1 publication Critical patent/DE69104861D1/de

1995-06-08 Publication of DE69104861T2 publication Critical patent/DE69104861T2/de

2011-02-12 Anticipated expiration legal-status Critical

Status Expired - Fee Related legal-status Critical Current

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
- G11B5/73—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
- G11B5/735—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 characterised by the back 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
- 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
- G11B5/733—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 characterised by the addition of non-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
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- 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
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2911—Mica flake
- 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
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2913—Rod, strand, filament or fiber
- Y10T428/298—Physical dimension
- 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
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]

DE69104861T 1990-02-13 1991-02-11 Magnetische Aufzeichnungsträger. Expired - Fee Related DE69104861T2 (de)

Applications Claiming Priority (2)

Application Number	Priority Date	Filing Date	Title
JP2032067A JP2945696B2 (ja)	1990-02-13	1990-02-13	磁気記録媒体
JP2153197A JP2667040B2 (ja)	1990-06-11	1990-06-11	磁気記録媒体

Publications (2)

Publication Number	Publication Date
DE69104861D1 true DE69104861D1 (de)	1994-12-08
DE69104861T2 DE69104861T2 (de)	1995-06-08

Family

ID=26370580

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
DE69104861T Expired - Fee Related DE69104861T2 (de)	1990-02-13	1991-02-11	Magnetische Aufzeichnungsträger.

Country Status (3)

Country	Link
US (1)	US5541008A (de)
EP (1)	EP0442422B1 (de)
DE (1)	DE69104861T2 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH04195819A (ja) *	1990-11-27	1992-07-15	Victor Co Of Japan Ltd	磁気記録媒体
EP0798701B1 (de) *	1992-01-08	2001-07-25	Fuji Photo Film Co., Ltd.	Magnetisches Aufzeichnungsmedium
JPH05347017A (ja) *	1992-04-14	1993-12-27	Konica Corp	磁気記録媒体
DE69311834T3 (de) *	1992-04-14	2001-11-15	Konica Corp., Tokio/Tokyo	Magnetisches Aufzeichnungsmedium
WO1994008336A1 (en) *	1992-09-30	1994-04-14	Tdk Corporation	Magnetic recording medium
US5366795A (en) *	1992-10-21	1994-11-22	Konica Corporation	Magnetic recording medium having three layers each containing particles and a binder wherein the relationship of particle crystal size in the second and third layers is specified
JP3559388B2 (ja) *	1996-04-26	2004-09-02	富士写真フイルム株式会社	磁気テープ記録媒体
EP0823399B1 (de) *	1996-08-09	2000-11-15	Toda Kogyo Corporation	Rechteckige, parallelopipedale Lepidokrokitteilchen und Verfahren zu ihrer Herstellung

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
US4568619A (en) *	1983-06-09	1986-02-04	E. I. Du Pont De Nemours And Company	Nonmagnetic particles to improve properties of magnetic recording compositions
JPS60143433A (ja) *	1983-12-28	1985-07-29	Matsushita Electric Ind Co Ltd	磁気記録媒体及びその製造方法
JPS60205821A (ja) *	1984-03-30	1985-10-17	Teijin Ltd	フロツピ−デイスク
JP2500934B2 (ja) *	1985-03-27	1996-05-29	ティーディーケイ株式会社	磁気記録媒体
JPS6329318A (ja) *	1986-07-23	1988-02-08	Hitachi Maxell Ltd	磁気記録媒体
JPS63191315A (ja) *	1987-02-04	1988-08-08	Fuji Photo Film Co Ltd	磁気記録媒体
US5019446A (en) *	1988-11-21	1991-05-28	Battelle Memorial Institute	Enhancement of mechanical properties of polymers by thin flake addition and apparatus for producing such thin flakes

1991
- 1991-02-11 EP EP91101886A patent/EP0442422B1/de not_active Expired - Lifetime
- 1991-02-11 DE DE69104861T patent/DE69104861T2/de not_active Expired - Fee Related
1994
- 1994-11-18 US US08/345,353 patent/US5541008A/en not_active Expired - Fee Related

Also Published As

Publication number	Publication date
EP0442422A1 (de)	1991-08-21
DE69104861T2 (de)	1995-06-08
EP0442422B1 (de)	1994-11-02
US5541008A (en)	1996-07-30

Publication	Publication Date	Title
DE3885825D1 (de)	1994-01-05	Magnetische Aufzeichnungsträger.
DE69333235D1 (de)	2003-11-06	Magnetisches Aufzeichnungsmedium
DE69213636D1 (de)	1996-10-17	Magnetaufzeichnungsträger
DE69222823D1 (de)	1997-11-27	Magnetisches Aufzeichnungsmedium
DE69402216D1 (de)	1997-04-30	Magnetisches Aufzeichnungsmedium
DE69211945D1 (de)	1996-08-08	Magnetisches Aufzeichnungsmedium
DE68917903D1 (de)	1994-10-06	Magneto-optischer Aufzeichnungsträger.
DE69007261D1 (de)	1994-04-14	Langgestreckter magnetischer Aufzeichnungsträger.
DE59007831D1 (de)	1995-01-12	Magnetische Aufzeichnungsträger.
DE69325331D1 (de)	1999-07-22	Magnetisches Aufzeichnungsmdedium
DE69111130D1 (de)	1995-08-17	Magnetisch aufzeichnendes Plattensystem.
DE69326441D1 (de)	1999-10-21	Magnetisches aufzeichnungsmedium
DE59205483D1 (de)	1996-04-04	Magnetische Aufzeichnungsträger
DE59305529D1 (de)	1997-04-03	Magnetische Aufzeichnungsträger
DE69110362D1 (de)	1995-07-20	Magnetischer Aufzeichnungsträger.
DE69110945D1 (de)	1995-08-10	Magnetisches Aufzeichnungsmedium.
FR2710773B1 (fr)	1997-10-31	Supports magnétiques d'enregistrement.
DE69104861D1 (de)	1994-12-08	Magnetische Aufzeichnungsträger.
DE69200172D1 (de)	1994-07-14	Magnetisches Aufnahmemedium.
DE69105810D1 (de)	1995-01-26	Magnetischer Aufzeichnungsträger.
DE69201404D1 (de)	1995-03-23	Magnetisches Aufzeichnungsmedium.
DE59102837D1 (de)	1994-10-13	Magnetische Aufzeichnungsträger.
DE59101674D1 (de)	1994-06-23	Magnetische Aufzeichnungsträger.
DE69103778D1 (de)	1994-10-13	Magnetische Aufzeichnungsplatte.
DE69109094D1 (de)	1995-05-24	Magnetische Aufzeichnungsträger.

Legal Events

Date	Code	Title
1995-11-30	8364	No opposition during term of opposition
1997-11-13	8320	Willingness to grant licences declared (paragraph 23)
2006-12-14	8339	Ceased/non-payment of the annual fee