Inventor · disambiguated record
Kowang Liu
Also filed as: LIU KOWANG
38 granted patents·1 pending application·359 citations·filing 2001–2024
97Inventor score
Top patents by PatentIndex Score
39 records- 0197US8264792B2PMR writer device with multi-level tapered write poleBAI ZHIGANG·Filed 2009·Granted Sep 11, 2012·80 cites·5 claims
- 0296US7995425B2Power control of TAMR element during read/write transitionHEADWAY TECHNOLOGIES INC·Filed 2009·Granted Aug 9, 2011·30 cites·4 claims
- 0394US8004794B2Perpendicular magnetic recording head laminated with AFM-FM phase change materialHEADWAY TECHNOLOGIES INC·Filed 2007·Granted Aug 23, 2011·30 cites·9 claims
- 0492US12094497B1Optimizing a current distribution in write heads for efficient energy-assisted magnetic recordingHEADWAY TECH INC·Filed 2023·Granted Sep 17, 2024·3 cites·20 claims
- 0592US8848495B1Plasmon generator self-annealing with current injection in TAMRHEADWAY TECHNOLOGIES INC·Filed 2013·Granted Sep 30, 2014·20 cites·30 claims
- 0692US8654618B1TAMR structure with HDI sensor for head-disk interference and temperature rise sensingLIU KOWANG·Filed 2012·Granted Feb 18, 2014·26 cites·20 claims
- 0792US8094418B2Vertically stacked DFH heater design for protrusion shape controlSCHRECK ERHARD·Filed 2008·Granted Jan 10, 2012·16 cites·20 claims
- 0892US8023218B2Electric field assisted magnetic recordingHEADWAY TECHNOLOGIES INC·Filed 2008·Granted Sep 20, 2011·13 cites·11 claims
- 0991US8274758B2Composite writer shield for improving writer performanceWU YAN·Filed 2008·Granted Sep 25, 2012·15 cites·11 claims
- 1090US10279451B1Dual perpendicular magnetic recording (PMR) writer application with special up and down head assignment for best areal density in hard disk drive (HDD)HEADWAY TECH INC·Filed 2018·Granted May 7, 2019·10 cites·23 claims
- 1188US10811034B1Heat sink structure for microwave-assisted magnetic recording (MAMR) headHEADWAY TECH INC·Filed 2019·Granted Oct 20, 2020·9 cites·20 claims
- 1288US10311900B1Magnetic core and coil design for double perpendicular magnetic recording (PMR) writersHEADWAY TECH INC·Filed 2018·Granted Jun 4, 2019·9 cites·20 claims
- 1388US8817425B1Dual-piece heat sink layer for robust reader in magnetic recording headHEADWAY TECHNOLOGIES INC·Filed 2013·Granted Aug 26, 2014·11 cites·28 claims
- 1488US8085498B2PMR write with flux choking areaBAI ZHIGANG·Filed 2009·Granted Dec 27, 2011·9 cites·25 claims
- 1586US10360935B1Dual write heater for slider surface topography control in double perpendicular magnetic recording (PMR) writersHEADWAY TECH INC·Filed 2018·Granted Jul 23, 2019·10 cites·30 claims
- 1686US8670212B2PMR writer device with multi-level tapered write poleBAI ZHIGANG·Filed 2012·Granted Mar 11, 2014·6 cites·5 claims
- 1783US12073857B1Perpendicular magnetic recording head equipping a spin torque oscillator element with an electric current in side gapsHEADWAY TECH INC·Filed 2023·Granted Aug 27, 2024·1 cites·12 claims
- 1883US10482905B2Magnetic core and coil design for double perpendicular magnetic recording (PMR) writersHEADWAY TECH INC·Filed 2018·Granted Nov 19, 2019·6 cites·16 claims
- 1983US8593915B2Thermally-assisted magnetic recording head capable of reducing the transient protrusion of an antennaSCHRECK ERHARD·Filed 2011·Granted Nov 26, 2013·6 cites·8 claims
- 2083US7933095B2Magnetic head for perpendicular magnetic recording including a stopper layer for suppressing protrusion of the front end face of a shieldHEADWAY TECHNOLOGIES INC·Filed 2007·Granted Apr 26, 2011·5 cites·24 claims
- 2182US11211084B1Protective shields under touchdown conditions for thermally assisted perpendicular magnetic recordingSAE MAGNETICS HK LTD·Filed 2020·Granted Dec 28, 2021·2 cites·20 claims
- 2281US8446692B2Perpendicular magnetic recording head laminated with AFM-FM phase change materialZHOU YUCHEN·Filed 2011·Granted May 21, 2013·5 cites·6 claims
- 2380US10566013B1Semiconductor laser for thermally-assisted magnetic recording headSAE MAGNETICS HK LTD·Filed 2019·Granted Feb 18, 2020·5 cites·9 claims
- 2475US9218830B2Magnetic pole self-annealing with current injection in perpendicular magnetic recording (PMR)HEADWAY TECHNOLOGIES INC·Filed 2014·Granted Dec 22, 2015·3 cites·20 claims
- 2575US8881376B2Method of manufacturing a perpendicular magnetic recording head laminated with AFM-FM phase change materialZHOU YUCHEN·Filed 2011·Granted Nov 11, 2014·3 cites·16 claims
- 2674US8054583B2Ta/W film as heating device for dynamic fly height adjustmentHEADWAY TECHNOLOGIES INC·Filed 2008·Granted Nov 8, 2011·2 cites·20 claims
- 2772US9025280B2PMR writer device with multi-level tapered write poleHEADWAY TECHNOLOGIES INC·Filed 2014·Granted May 5, 2015·2 cites·9 claims
- 2871US12469518B1Recessed write gap material for enhanced bias current injection and maximizing aerial density capacity in perpendicular magnetic recordingHEADWAY TECH INC·Filed 2024·Granted Nov 11, 2025·0 cites·18 claims
- 2971US9105287B2Method of forming a PMR writer device with multi-level tapered write poleBAI ZHIGANG·Filed 2012·Granted Aug 11, 2015·2 cites·7 claims
- 3069US10629233B1Bumper pad design for TAMR drivesSAE MAGNETICS HK LTD·Filed 2019·Granted Apr 21, 2020·2 cites·12 claims
- 3165US9659584B2Dynamic flying height read/write head with off-track contact capability at touch down in hard disk drivesLIU KOWANG·Filed 2007·Granted May 23, 2017·1 cites·7 claims
- 3264US7385789B2Magnetostrictive actuator in a magnetic headHEADWAY TECHNOLOGIES INC·Filed 2004·Granted Jun 10, 2008·5 cites·24 claims
- 3360US8810962B2Insertion under read shield for improved read gap actuation in dynamic flying heightWU YAN·Filed 2009·Granted Aug 19, 2014·2 cites·9 claims
- 3460US6608724B2Precision dispensing apparatus and method for manufacturing thin-film optical assemblyOPLINK COMMUNICATIONS INC·Filed 2001·Granted Aug 19, 2003·7 cites·24 claims
- 3557US7748439B2Heat extractor for magnetic reader-writerHEADWAY TECHNOLOGIES INC·Filed 2004·Granted Jul 6, 2010·3 cites·11 claims
- 3651US12387750B1DFH heater designSAE MAGNETICS HK LTD·Filed 2024·Granted Aug 12, 2025·0 cites·19 claims
- 3750US2025378847A1Novel DFH Bulge by Heat Sink DesignSAE MAGNETICS HK LTD·Filed 2024·Application pending·0 cites
- 3848US11973310B2Light source unit and thermally-assisted magnetic headSAE MAGNETICS HK LTD·Filed 2019·Granted Apr 30, 2024·0 cites·8 claims
- 3939US11289116B1Patterned reader shields for a cooler readerHEADWAY TECH INC·Filed 2020·Granted Mar 29, 2022·0 cites·20 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →