Inventor · disambiguated record
Yukinori Ikegawa
Also filed as: IKEGAWA YUKINORI
51 granted patents·4 pending applications·330 citations·filing 1995–2024
98Inventor score
Top patents by PatentIndex Score
55 records- 0193US8416528B1Magnetic head for perpendicular magnetic recording having a return path sectionSASAKI YOSHITAKA·Filed 2012·Granted Apr 9, 2013·20 cites·12 claims
- 0292US9230568B1Magnetic head for perpendicular magnetic recording including a coil having an inclined front end faceIKEGAWA YUKINORI·Filed 2015·Granted Jan 5, 2016·15 cites·9 claims
- 0392US9218835B1Thermally-assisted magnetic recording head including a heat sinkSASAKI YOSHITAKA·Filed 2014·Granted Dec 22, 2015·18 cites·9 claims
- 0491US11514931B1Magnetic head including main pole having top surface including first inclined portion, second inclined portion, and third inclined portion, and spin torque oscillatorARAKI HIRONORI·Filed 2022·Granted Nov 29, 2022·3 cites·10 claims
- 0591US11049516B1Near-field light generator and thermally-assisted magnetic recording headIKEGAWA YUKINORI·Filed 2020·Granted Jun 29, 2021·4 cites·16 claims
- 0691US8947986B1Heat sink for thermally assisted magnetic recording (TAMR)HEADWAY TECHNOLOGIES INC·Filed 2014·Granted Feb 3, 2015·14 cites·30 claims
- 0791US6510024B2Magnetic head and method of manufacturing the sameFUJITSU LTD·Filed 2001·Granted Jan 21, 2003·34 cites·2 claims
- 0890US9502053B1Magnetic head for perpendicular magnetic recording with a trailing shield including a plurality of portions different in saturation flux densitySASAKI YOSHITAKA·Filed 2015·Granted Nov 22, 2016·11 cites·17 claims
- 0987US9489969B1Magnetic head including a main pole and a write shield to provide improved write characteristics without compromising the function of the write shieldIKEGAWA YUKINORI·Filed 2015·Granted Nov 8, 2016·9 cites·8 claims
- 1085US9218827B1Thermally-assisted magnetic recording head including a return path sectionSASAKI YOSHITAKA·Filed 2014·Granted Dec 22, 2015·8 cites·11 claims
- 1185US9082422B2Magnetic 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 shieldSASAKI YOSHITAKA·Filed 2013·Granted Jul 14, 2015·7 cites·7 claims
- 1284US8867169B2Magnetic head for perpendicular magnetic recording having a main pole and a shieldSASAKI YOSHITAKA·Filed 2012·Granted Oct 21, 2014·7 cites·9 claims
- 1383US9336798B1Magnetic head for perpendicular magnetic recording including a main pole with a lower protrusionSASAKI YOSHITAKA·Filed 2014·Granted May 10, 2016·6 cites·17 claims
- 1483US8691102B1Method of manufacturing plasmon generatorARAKI HIRONORI·Filed 2012·Granted Apr 8, 2014·6 cites·14 claims
- 1581US8576674B2Plasmon generator including two portions made of different metalsSASAKI YOSHITAKA·Filed 2011·Granted Nov 5, 2013·5 cites·14 claims
- 1680US8400884B1Method of manufacturing plasmon generatorARAKI HIRONORI·Filed 2012·Granted Mar 19, 2013·5 cites·10 claims
- 1780US6751052B1Thin film magnetic head with short lower magnetic pole pieceFUJITSU LTD·Filed 2000·Granted Jun 15, 2004·16 cites·20 claims
- 1880US6614620B2Thin film magnetic headFUJITSU LTD·Filed 2001·Granted Sep 2, 2003·15 cites·13 claims
- 1980US5583726AMagneto-resistive head using flux guideFUJITSU LTD·Filed 1995·Granted Dec 10, 1996·31 cites·6 claims
- 2075US12456485B1Noble metal coated plasmonic waveguide blocker for heat assisted magnetic recording headHEADWAY TECH INC·Filed 2024·Granted Oct 28, 2025·0 cites·21 claims
- 2175US8461050B2Taper-etching method and method of manufacturing near-field light generatorARAKI HIRONORI·Filed 2011·Granted Jun 11, 2013·3 cites·12 claims
- 2270US10872624B1Magnetic head including a return path sectionSASAKI YOSHITAKA·Filed 2019·Granted Dec 22, 2020·2 cites·9 claims
- 2370US9704513B2Magnetic 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 turnSASAKI YOSHITAKA·Filed 2015·Granted Jul 11, 2017·2 cites·2 claims
- 2470US9330702B2Thermally-assisted magnetic recording head having a heat sinkARAKI HIRONORI·Filed 2013·Granted May 3, 2016·2 cites·7 claims
- 2570US9030776B1Magnetic head for perpendicular magnetic recording including a main pole and a shieldSASAKI YOSHITAKA·Filed 2013·Granted May 12, 2015·2 cites·11 claims
- 2667US9653100B1Magnetic head for perpendicular magnetic recording capable of preventing unwanted erasureSASAKI YOSHITAKA·Filed 2015·Granted May 16, 2017·2 cites·17 claims
- 2766US6083410AThin film magnetic head and process for producing sameFUJITSU LTD·Filed 1997·Granted Jul 4, 2000·18 cites·12 claims
- 2865US9741370B2Magnetic head for perpendicular magnetic recording including a coil having an inclined surfaceSASAKI YOSHITAKA·Filed 2015·Granted Aug 22, 2017·2 cites·9 claims
- 2965US6282776B1Magnetic head and method of manufacturing the sameFUJITSU LTD·Filed 1998·Granted Sep 4, 2001·18 cites·9 claims
- 3063US11996126B2Iridium film with a thin iridium template layer for a heat-assisted magnetic recording (HAMR) writerHEADWAY TECH INC·Filed 2022·Granted May 28, 2024·0 cites·19 claims
- 3163US9478241B1Thermally-assisted magnetic recording head having inclined main magnetic pole and coreTANEMURA SHIGEKI·Filed 2016·Granted Oct 25, 2016·2 cites·6 claims
- 3262US10545287B1Waveguide including first and second layers and manufacturing method thereofIKEGAWA YUKINORI·Filed 2018·Granted Jan 28, 2020·1 cites·14 claims
- 3362US9640202B2Method of manufacturing plasmon generatorTANEMURA SHIGEKI·Filed 2013·Granted May 2, 2017·1 cites·9 claims
- 3461US9754614B1Plasmon generator including a heat sink layer interposed between two portions formed of different metal materialsSASAKI YOSHITAKA·Filed 2016·Granted Sep 5, 2017·1 cites·29 claims
- 3560US9792929B1Magnetic head for perpendicular magnetic recording including a coil having an inclined surfaceSASAKI YOSHITAKA·Filed 2017·Granted Oct 17, 2017·1 cites·6 claims
- 3659US9958769B1Method of manufacturing a plasmon generatorARAKI HIRONORI·Filed 2016·Granted May 1, 2018·1 cites·10 claims
- 3758US5717630AMagnetic memory deviceFUJITSU LTD·Filed 1996·Granted Feb 10, 1998·13 cites·33 claims
- 3855US11664045B1Manufacturing method for magnetoresistive elementARAKI HIRONORI·Filed 2022·Granted May 30, 2023·0 cites·7 claims
- 3952US5870262AMagneto resistive effect type head having a stressed insulation layerFUJITSU LTD·Filed 1996·Granted Feb 9, 1999·11 cites·10 claims
- 4051US6088908AMethod of making a head sliderFUJITSU LTD·Filed 1998·Granted Jul 18, 2000·9 cites·4 claims
- 4149US2007293035A1Interlayer insulating layer and method of manufacturing the sameFUJITSU LTD·Filed 2006·Application pending·0 cites
- 4248US9824702B2Magnetic 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 turnHEADWAY TECH INC·Filed 2017·Granted Nov 21, 2017·0 cites·3 claims
- 4348US2008008840A1Method of manufacturing a metal patternFUJITSU LTD·Filed 2006·Application pending·0 cites
- 4448US2008218902A1Method for measuring width of plating layer, magnetic recording head, and manufacturing method thereofFUJITSU LTD·Filed 2008·Application pending·0 cites
- 4547US11495251B1Manufacturing method for magnetic head for perpendicular magnetic recording including a pair of first side shields and a pair of second side shieldsIKEGAWA YUKINORI·Filed 2022·Granted Nov 8, 2022·0 cites·8 claims
- 4646US9777387B2Method of manufacturing a thin-film magnetic head including a coil and a magnetic path forming sectionIKEGAWA YUKINORI·Filed 2014·Granted Oct 3, 2017·0 cites·7 claims
- 4746US9076465B1Magnetic head including a first and second insulating film between a coil element and a write shieldSASAKI YOSHITAKA·Filed 2013·Granted Jul 7, 2015·0 cites·7 claims
- 4846US2024161772A1Gold-Copper Alloy In A Heat-Assisted Magnetic Recording WriterHEADWAY TECH INC·Filed 2022·Application pending·0 cites
- 4945US11604313B2Waveguide and manufacturing method thereofIKEGAWA YUKINORI·Filed 2021·Granted Mar 14, 2023·0 cites·17 claims
- 5042US11410688B1Thermally-assisted magnetic recording head having plasmon generator of multiple metal layersSASAKI YOSHITAKA·Filed 2021·Granted Aug 9, 2022·0 cites·15 claims
Showing the top 50 of 55 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →