Inventor
IKEGAWA YUKINORI
US51 patents
⚠️ This page may combine multiple inventors who share the name “IKEGAWA YUKINORI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
SASAKI YOSHITAKA
18 patentsUS9502053B1Nov 22, 2016
Magnetic head for perpendicular magnetic recording with a trailing shield including a plurality of portions different in saturation flux density
SASAKI YOSHITAKA11 citations84
US9218835B1Dec 22, 2015
Thermally-assisted magnetic recording head including a heat sink
SASAKI YOSHITAKA18 citations84
US9218827B1Dec 22, 2015
Thermally-assisted magnetic recording head including a return path section
SASAKI YOSHITAKA8 citations84
US9082422B2Jul 14, 2015
Magnetic head for perpendicular magnetic recording including a main pole and a write shield to provide improved write characteristics without compromising the function of the write shield
SASAKI YOSHITAKA7 citations84
US8867169B2Oct 21, 2014
Magnetic head for perpendicular magnetic recording having a main pole and a shield
SASAKI YOSHITAKA7 citations84
US8416528B1Apr 9, 2013
Magnetic head for perpendicular magnetic recording having a return path section
SASAKI YOSHITAKA20 citations84
US10872624B1Dec 22, 2020
Magnetic head including a return path section
SASAKI YOSHITAKA2 citations73
US9741370B2Aug 22, 2017
Magnetic head for perpendicular magnetic recording including a coil having an inclined surface
SASAKI YOSHITAKA2 citations73
US9704513B2Jul 11, 2017
Magnetic head for perpendicular magnetic recording with a coil including a first winding portion of one turn and a second winding portion of less than one turn
SASAKI YOSHITAKA2 citations73
US9653100B1May 16, 2017
Magnetic head for perpendicular magnetic recording capable of preventing unwanted erasure
SASAKI YOSHITAKA2 citations73
US9336798B1May 10, 2016
Magnetic head for perpendicular magnetic recording including a main pole with a lower protrusion
SASAKI YOSHITAKA6 citations73
US8576674B2Nov 5, 2013
Plasmon generator including two portions made of different metals
SASAKI YOSHITAKA5 citations73
US9030776B1May 12, 2015
Magnetic head for perpendicular magnetic recording including a main pole and a shield
SASAKI YOSHITAKA2 citations63
US11410688B1Aug 9, 2022
Thermally-assisted magnetic recording head having plasmon generator of multiple metal layers
SASAKI YOSHITAKA0 citations52
US9792929B1Oct 17, 2017
Magnetic head for perpendicular magnetic recording including a coil having an inclined surface
SASAKI YOSHITAKA1 citations52
US9754614B1Sep 5, 2017
Plasmon generator including a heat sink layer interposed between two portions formed of different metal materials
SASAKI YOSHITAKA1 citations52
US10366712B1Jul 30, 2019
Magnetic head for perpendicular magnetic recording including two side shields configured to enable a reduction in width of an end face of the main pole located in a medium facing surface and an increase in cross-sectional area of the main pole in the vicinity of the medium facing surface
SASAKI YOSHITAKA0 citations42
US9076465B1Jul 7, 2015
Magnetic head including a first and second insulating film between a coil element and a write shield
SASAKI YOSHITAKA0 citations42
FUJITSU LTD
12 patentsUS6510024B2Jan 21, 2003
Magnetic head and method of manufacturing the same
FUJITSU LTD34 citations92
US5583726ADec 10, 1996
Magneto-resistive head using flux guide
FUJITSU LTD31 citations92
US6614620B2Sep 2, 2003
Thin film magnetic head
FUJITSU LTD15 citations84
US6282776B1Sep 4, 2001
Magnetic head and method of manufacturing the same
FUJITSU LTD18 citations84
US6083410AJul 4, 2000
Thin film magnetic head and process for producing same
FUJITSU LTD18 citations84
US6751052B1Jun 15, 2004
Thin film magnetic head with short lower magnetic pole piece
FUJITSU LTD16 citations83
US6088908AJul 18, 2000
Method of making a head slider
FUJITSU LTD9 citations74
US5717630AFeb 10, 1998
Magnetic memory device
FUJITSU LTD13 citations74
US5870262AFeb 9, 1999
Magneto resistive effect type head having a stressed insulation layer
FUJITSU LTD11 citations70
US5777827AJul 7, 1998
Horizontal type magneto-resistive head using flux guide
FUJITSU LTD2 citations63
US6104575AAug 15, 2000
Planar thin-film magnetic head and manufacturing method therefor
FUJITSU LTD3 citations62
US6809902B2Oct 26, 2004
Thin film magnetic head and method of manufacturing the same
FUJITSU LTD0 citations42
ARAKI HIRONORI
8 patentsUS8691102B1Apr 8, 2014
Method of manufacturing plasmon generator
ARAKI HIRONORI6 citations73
US8400884B1Mar 19, 2013
Method of manufacturing plasmon generator
ARAKI HIRONORI5 citations73
US11514931B1Nov 29, 2022
Magnetic head including main pole having top surface including first inclined portion, second inclined portion, and third inclined portion, and spin torque oscillator
ARAKI HIRONORI3 citations72
US9330702B2May 3, 2016
Thermally-assisted magnetic recording head having a heat sink
ARAKI HIRONORI2 citations63
US8461050B2Jun 11, 2013
Taper-etching method and method of manufacturing near-field light generator
ARAKI HIRONORI3 citations63
US11664045B1May 30, 2023
Manufacturing method for magnetoresistive element
ARAKI HIRONORI0 citations52
US9958769B1May 1, 2018
Method of manufacturing a plasmon generator
ARAKI HIRONORI1 citations52
US8465658B2Jun 18, 2013
Method of forming main pole of thermally-assisted magnetic recording head
ARAKI HIRONORI0 citations42
IKEGAWA YUKINORI
6 patentsUS9489969B1Nov 8, 2016
Magnetic head including a main pole and a write shield to provide improved write characteristics without compromising the function of the write shield
IKEGAWA YUKINORI9 citations83
US9230568B1Jan 5, 2016
Magnetic head for perpendicular magnetic recording including a coil having an inclined front end face
IKEGAWA YUKINORI15 citations83
US11049516B1Jun 29, 2021
Near-field light generator and thermally-assisted magnetic recording head
IKEGAWA YUKINORI4 citations72
US10545287B1Jan 28, 2020
Waveguide including first and second layers and manufacturing method thereof
IKEGAWA YUKINORI1 citations62
US11604313B2Mar 14, 2023
Waveguide and manufacturing method thereof
IKEGAWA YUKINORI0 citations51
US11495251B1Nov 8, 2022
Manufacturing method for magnetic head for perpendicular magnetic recording including a pair of first side shields and a pair of second side shields
IKEGAWA YUKINORI0 citations51
HEADWAY TECH INC
3 patentsUS12456485B1Oct 28, 2025
Noble metal coated plasmonic waveguide blocker for heat assisted magnetic recording head
HEADWAY TECH INC0 citations62
US11996126B2May 28, 2024
Iridium film with a thin iridium template layer for a heat-assisted magnetic recording (HAMR) writer
HEADWAY TECH INC0 citations62
US9824702B2Nov 21, 2017
Magnetic head for perpendicular magnetic recording with a coil including a first winding portion of one turn and a second winding portion of less than one turn
HEADWAY TECH INC0 citations52
TANEMURA SHIGEKI
2 patentsHEADWAY TECHNOLOGIES INC
1 patentShowing the top 50 of 51 patents by PatentIndex Score.