Magnetic recording media

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 4717622
SERIAL NO

06838814

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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A magnetic recording medium has a protective layer made of high hardness carbon synthesized under a low-temperature and a low-pressure by blowing hydrocarbon gas plasma onto a magnetic recording layer. The resistance thereof is large, and therefore, high density magnetic recording can be realized in a magnetic recording system wherein the magnetic head contacts the magnetic recording medium. Durability of the magnetic recording medium is substantially improved.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.OSAKA11035

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Kurokawa, Hideo Katano, JP 38 672
Mitani, Tsutomu Neyagawa, JP 33 537
Yonezawa, Taketoshi Ibaraki, JP 12 410

Cited Art Landscape

Patent Info (Count) # Cites Year
 
ASAHI KOMAG CO., LTD. (1)
* 4411963 Thin film recording and method of making 72 1981
 
XEBEC, INC. (1)
* 4503125 Protective overcoating for magnetic recording discs and method for forming the same 74 1981
* Cited By Examiner

Patent Citation Ranking

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Patent Info (Count) # Cites Year
 
MINNESOTA MINING AND MANUFACTURING COMPANY (1)
* 5464667 Jet plasma process and apparatus 77 1994
 
Other [Check patent profile for assignment information] (1)
6974629 Low-emissivity, soil-resistant coating for glass surfaces 17 1999
 
3M INNOVATIVE PROPERTIES COMPANY (5)
6203898 Article comprising a substrate having a silicone coating 38 1997
6348237 Jet plasma process for deposition of coatings 35 2001
* 2002/0102,361 Jet plasma process and apparatus for deposition of coatings and the coatings thereof 0 2001
7189436 Flash evaporation-plasma coating deposition method 5 2004
* 2005/0003,098 Flash evaporation-plasma coating deposition method 23 2004
 
THE BOARD OF TRUSTEES OF THE LELAND STANFORD JUNIOR UNIVERSITY (1)
* 4898748 Method for enhancing chemical reactivity in thermal plasma processes 24 1988
 
GLOBALFOUNDRIES INC. (2)
* 5470661 Diamond-like carbon films from a hydrocarbon helium plasma 248 1993
* 5569501 Diamond-like carbon films from a hydrocarbon helium plasma 46 1995
 
HITACHI GLOBAL STORAGE TECHNOLOGIES JAPAN, LTD. (1)
* 5500296 Magnetic recording medium, process for producing magnetic recording medium, apparatus for producing magnetic recording medium, and magnetic recording apparatus 18 1994
 
UNIVERSITY OF LOUISVILLE RESEARCH FOUNDATION, INC. (2)
7964013 FeRh-FePt core shell nanostructure for ultra-high density storage media 3 2009
* 2010/0323,219 FeRh-FePt CORE SHELL NANOSTRUCTURE FOR ULTRA-HIGH DENSITY STORAGE MEDIA 0 2009
 
CARDINAL CG COMPANY (23)
6964731 Soil-resistant coating for glass surfaces 37 1999
6660365 Soil-resistant coating for glass surfaces 19 2000
6939446 Soil-resistant coating for glass surfaces 1 2003
7294403 Soil-resistant coating for glass surfaces 0 2004
* 2005/0025,982 Soil-resistant coating for glass surfaces 4 2004
7491301 Methods and apparatuses for depositing film on both sides of a pane 0 2004
* 2005/0016,835 Soil-resistant coating for glass surfaces 12 2004
7294404 Graded photocatalytic coatings 17 2004
* 2005/0137,084 Graded photocatalytic coatings 7 2004
8092660 Methods and equipment for depositing hydrophilic coatings, and deposition technologies for thin films 1 2005
* 2006/0118,408 Methods and equipment for depositing hydrophilic coatings, and deposition technologies for thin films 5 2005
* 2006/0000,706 Soil-resistant coating for glass surfaces 0 2005
7713632 Low-maintenance coatings 9 2005
7604865 Low-maintenance coatings 10 2005
* 2006/0057,298 Low-maintenance coatings 10 2005
* 2006/0115,655 Low-emissivity, soil-resistant coating for glass surfaces 1 2005
7923114 Hydrophilic coatings, methods for depositing hydrophilic coatings, and improved deposition technology for thin films 2 2005
7989094 Opposed functional coatings having comparable single surface reflectances 0 2007
* 2007/0248,756 OPPOSED FUNCTIONAL COATINGS HAVING COMPARABLE SINGLE SURFACE REFLECTANCES 13 2007
8696879 Low-maintenance coating technology 0 2010
8506768 Low-maintenance coatings, and methods for producing low-maintenance coatings 1 2010
RE44155 Low-maintenance coatings 0 2011
RE43817 Low-maintenance coatings 0 2011
 
HITACHI, LTD. (1)
* 5275850 Process for producing a magnetic disk having a metal containing hard carbon coating by plasma chemical vapor deposition under a negative self bias 46 1991
 
FUJI ELECTRIC CO., LTD. (1)
* 5614314 Magnetic recording medium having an enhanced diamond bonding ratio and a method for the manufacture thereof 13 1993
 
UNITED MODULE CORPORATION (1)
* 5470447 Method for applying a protective coating on a magnetic recording head 5 1994
 
NEXEON LIMITED (1)
* 2014/0004,426 FABRICATION AND USE OF CARBON-COATED SILICON MONOXIDE FOR LITHIUM-ION BATTERIES 0 2012
 
SEAGATE TECHNOLOGY LLC (1)
* 5945191 Multi-phase carbon overcoats for magnetic discs 17 1997
 
WD MEDIA, INC. (3)
* 5227211 Magnetic recording disk medium comprising a magnetic thin film and a carbon overcoat having surface nitrogen atoms, a specified carbon structure, and oxygen atoms 42 1991
* 5567512 Thin carbon overcoat and method of its making 49 1993
* 5679431 Sputtered carbon overcoat in a thin-film medium and sputtering method 39 1994
 
SEMICONDUCTOR ENERGY LABORATORY CO., LTD. (17)
* 5190824 Electrostatic-erasing abrasion-proof coating 31 1991
* 6207281 Electrostatic-erasing abrasion-proof coating and method for forming the same 18 1993
* 5637373 Magnetic recording medium 20 1993
* 6165582 Magnetic recording medium 11 1997
* 5989672 Magnetic recording medium 36 1997
* 5871847 Electrostatic-erasing abrasion-proof coating and method for forming the same 10 1997
* 6194047 Magnetic recording medium 23 1997
6265070 Electrostatic-erasing abrasion-proof coating and method for forming the same 10 1998
6805941 Magnetic recording medium 4 1999
6649246 Magnetic recording medium 0 1999
6623836 Magnetic recording medium 3 1999
6583481 Electrostatic-erasing abrasion-proof coating and method for forming the same 5 2001
7144629 Electrostatic-erasing abrasion-proof coating and method for forming the same 0 2003
7083873 Magnetic recording medium including a diamond-like carbon protective film with hydrogen and at least two additional elements 4 2003
* 2004/0157,059 Magnetic recording medium 0 2003
* 2005/0089,648 Apparatus for fabricating coating and method of fabricating the coating 20 2004
7391592 Magnetic recording medium including a diamond-like carbon protective film and at least two additional elements 0 2006
 
EMTEC MAGNETICS GMBH (1)
* 4891114 Magnetic recording media 2 1987
 
APPLIED MATERIALS, INC. (13)
6423384 HDP-CVD deposition of low dielectric constant amorphous carbon film 35 1999
6573030 Method for depositing an amorphous carbon layer 441 2000
6841341 Method of depositing an amorphous carbon layer 24 2002
6852647 Removable amorphous carbon CMP stop 15 2003
7223526 Method of depositing an amorphous carbon layer 21 2004
* 2005/0112,509 Method of depositing an amrphous carbon layer 0 2004
7148156 Removable amorphous carbon CMP stop 1 2005
* 2005/0191,848 Removable amorphous carbon CMP stop 1 2005
7507677 Removable amorphous carbon CMP stop 2 2006
* 2007/0054,500 Removable amorphous carbon cmp stop 17 2006
7335462 Method of depositing an amorphous carbon layer 2 2007
* 2007/0128,538 METHOD OF DEPOSITING AN AMORPHOUS CARBON LAYER 33 2007
* 2008/0254,233 PLASMA-INDUCED CHARGE DAMAGE CONTROL FOR PLASMA ENHANCED CHEMICAL VAPOR DEPOSITION PROCESSES 5 2007
 
The United States of America as represented by the Secretary of the Navy (1)
* 5075094 Method of growing diamond film on substrates 34 1990
 
SHOWA DENKO K.K. (1)
* 6132875 Magnetic recording medium and magnetic head having carbon protective layers 11 1996
 
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. (4)
* 5110676 Magnetic recording medium incorporating metallic magnetic thin film 26 1990
* 5364690 Magnetic recording medium comprising a ferromagnetic metal film and two carbon protective layers 31 1992
* 5451427 Magnetic recording medium and method of producing the same 7 1993
* 5443888 Magnetic recording medium having a carbon protective layer and partially fluorinated alkyl carboxylic acid lubricant layer 13 1993
 
CANON KABUSHIKI KAISHA (2)
* 4897829 Cardlike optical recording medium 23 1987
* 5132173 Magnetic recording medium having a silicon oxide protective layer with an electrical specific resistance of from 3.3.times.10.sup.13 to 5.0.times..sup.15 ohm.cm 12 1990
* Cited By Examiner