Inventor
KOYAMA NAOKI
JP37 patents
⚠️ This page may combine multiple inventors who share the name “KOYAMA NAOKI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
HITACHI LTD
28 patentsUS5390061AFeb 14, 1995
Multilayer magnetoresistance effect-type magnetic head
HITACHI LTD156 citations99
US6687099B2Feb 3, 2004
Magnetic head with conductors formed on endlayers of a multilayer film having magnetic layer coercive force difference
HITACHI LTD33 citations96
US6011674AJan 4, 2000
Magnetoresistance effect multilayer film with ferromagnetic film sublayers of different ferromagnetic material compositions
HITACHI LTD33 citations96
US5850326ADec 15, 1998
Narrow track thin film magnetic head suitable for high density recording and reproducing operations and fabrication method thereof wherein an air bearing surface has at least one groove containing a non-magnetic electrically conductive layer
HITACHI LTD45 citations96
US5726837AMar 10, 1998
Multilayer magnetoresistance effect-type magnetic head
HITACHI LTD43 citations96
US5287237AFeb 15, 1994
Antiferromagnetic film superior in corrosion resistance, magnetoresistance-effect element and magnetoresistance-effect head including such thin film
HITACHI LTD71 citations96
US5168409ADec 1, 1992
Integrated magnetic head having a magnetic layer functioning as both a magnetic shield and a magnetic pole
HITACHI LTD93 citations96
US5808843ASep 15, 1998
Magnetoresistance effect reproduction head
HITACHI LTD25 citations93
US5461526AOct 24, 1995
Magnetoresistive read head and magnetic storage system using the same
HITACHI LTD46 citations93
US5337203AAug 9, 1994
Magnetoresistive magnetic head
HITACHI LTD23 citations93
US6839200B2Jan 4, 2005
Combination perpendicular magnetic head having shield material formed at both ends of an upper pole of a write element
HITACHI LTD12 citations92
US6538844B2Mar 25, 2003
Method of fabricating a magnetic head by focused ion beam etching
HITACHI LTD13 citations92
US6483663B2Nov 19, 2002
Thin film magnetic head and magnetic disk apparatus including the same
HITACHI LTD14 citations92
US6278593B1Aug 21, 2001
Magnetoresistance effect elements and magnetic heads using the tunneling magnetoresistive effect
HITACHI LTD17 citations92
US5126907AJun 30, 1992
Thin film magnetic head having at least one magnetic core member made at least partly of a material having a high saturation magnetic flux density
HITACHI LTD38 citations92
US4415262ANov 15, 1983
Photomask
HITACHI LTD28 citations92
US6483677B2Nov 19, 2002
Magnetic disk apparatus including magnetic head having multilayered reproducing element using tunneling effect
HITACHI LTD11 citations82
US4502916AMar 5, 1985
Process for forming fine patterns
HITACHI LTD19 citations79
US6307707B1Oct 23, 2001
Narrow track thin film head including magnetic poles machined by focused ion beam etching
HITACHI LTD4 citations74
US6278578B1Aug 21, 2001
Narrow track thin film head having a focused ion beam etched air bearing surface
HITACHI LTD4 citations74
US6111723AAug 29, 2000
Narrow track thin film magnetic head suitable for high density recording and reproducing operations and fabrication method thereof wherein an air bearing surface has at least one groove containing a non-magnetic electrically conductive layer
HITACHI LTD8 citations74
US5212609AMay 18, 1993
Magnetoresistive head
HITACHI LTD15 citations74
US4922360AMay 1, 1990
Magnetic head
HITACHI LTD15 citations74
US5719729AFeb 17, 1998
Magnetic head and recording and reproducing apparatus having an arrangement for improving coincidence between a magnetic center of a read head and physical center of a write head
HITACHI LTD8 citations73
US6665141B2Dec 16, 2003
Magnetic head having track width defined by trench portions filled with magnetic shield material
HITACHI LTD1 citations63
US5521005AMay 28, 1996
Magnetoresistive head
HITACHI LTD4 citations63
US4503517AMar 5, 1985
Magnetic bubble memory device
HITACHI LTD3 citations62
US4772505ASep 20, 1988
Magnetic bubble memory element
HITACHI LTD1 citations52
HITACHI GLOBAL STORAGE TECH
6 patentsUS7054120B2May 30, 2006
Magnetic apparatus with perpendicular recording medium and head having multilayered reproducing element using tunneling effect
HITACHI GLOBAL STORAGE TECH7 citations74
US7382576B2Jun 3, 2008
Thin film magnetic head and magnetic disk apparatus including the same
HITACHI GLOBAL STORAGE TECH5 citations73
US6877212B2Apr 12, 2005
Manufacturing method of a thin film magnetic head
HITACHI GLOBAL STORAGE TECH6 citations73
US7586715B2Sep 8, 2009
Magnetic head with a narrow spacing between magnetic shields at air bearing surface
HITACHI GLOBAL STORAGE TECH7 citations72
US7068467B2Jun 27, 2006
Thin film magnetic head and magnetic disk apparatus including the same
HITACHI GLOBAL STORAGE TECH3 citations62
US7675715B2Mar 9, 2010
Magnetoresistive head and fabricating method thereof, and read write separation type head
HITACHI GLOBAL STORAGE TECH6 citations60