Inventor · disambiguated record
Francis H. Liu
Also filed as: LIU FRANCIS · LIU FRANCIS H
41 granted patents·6,299 citations·filing 1996–2013
99Inventor score
Files withWESTERN DIGITAL FREMONT INC14WESTERN DIGITAL FREMONT LLC12READ RITE CORP10LI SHAOPING2WESTERN DIGITAL INC1
Top patents by PatentIndex Score
41 records- 0199US8537495B1Magnetic writer having a split yokeWESTERN DIGITAL FREMONT LLC·Filed 2013·Granted Sep 17, 2013·153 cites·16 claims
- 0299US8373945B1Magnetic writer having a split yokeWESTERN DIGITAL FREMONT LLC·Filed 2007·Granted Feb 12, 2013·150 cites·20 claims
- 0399US7688546B1Perpendicular magnetic recording head having nonmagnetic insertion layersWESTERN DIGITAL FREMONT LLC·Filed 2006·Granted Mar 30, 2010·150 cites·27 claims
- 0499US7443632B1Magnetic head with stitched top pole layer and single layer coil or solenoidal coilWESTERN DIGITAL FREMONT LLC·Filed 2007·Granted Oct 28, 2008·163 cites·8 claims
- 0599US7375926B1Inductive writer design using a soft magnetic pedestal having a high magnetic saturation layerWESTERN DIGITAL FREMONT LLC·Filed 2007·Granted May 20, 2008·151 cites·16 claims
- 0699US7337530B1Method for manufacturing a shielded pole magnetic head for perpendicular recordingWESTERN DIGITAL FREMONT LLC·Filed 2007·Granted Mar 4, 2008·176 cites·14 claims
- 0799US7310204B1Inductive writer design for using a soft magnetic pedestal having a high magnetic saturation layerWESTERN DIGITAL FREMONT LLC·Filed 2003·Granted Dec 18, 2007·171 cites·16 claims
- 0899US7292409B1Magnetic head with thin trailing pedestal layerWESTERN DIGITAL FREMONT LLC·Filed 2004·Granted Nov 6, 2007·154 cites·38 claims
- 0999US7283327B1Magnetic write head having resistive heater coilWESTERN DIGITAL FREMONT LLC·Filed 2006·Granted Oct 16, 2007·156 cites·10 claims
- 1099US7248433B1Magnetic head with stitched top pole layer and single layer coil or solenoidal coilWESTERN DIGITAL FREMONT INC·Filed 2004·Granted Jul 24, 2007·166 cites·19 claims
- 1199US7193815B1Shielded pole magnetic head for perpendicular recordingWESTERN DIGITAL FREMONT INC·Filed 2004·Granted Mar 20, 2007·183 cites·25 claims
- 1299US7126788B1Trailing edge recording magnetic head with reversed double bias coil and deflection pole for perpendicular recording with a non-perpendicular write fieldWESTERN DIGITAL FREMONT INC·Filed 2003·Granted Oct 24, 2006·182 cites·35 claims
- 1399US7092195B1Method of using a magnetic write head having an internal heaterWESTERN DIGITAL FREMONT INC·Filed 2004·Granted Aug 15, 2006·189 cites·11 claims
- 1499US6912106B1Writer with a hot seed zero throat and substantially flat top poleWESTERN DIGITAL FREMONT INC·Filed 2002·Granted Jun 28, 2005·182 cites·24 claims
- 1599US6809899B1Magnetic heads for perpendicular recording with trapezoidal pole tipsWESTERN DIGITAL FREMONT INC·Filed 2003·Granted Oct 26, 2004·266 cites·25 claims
- 1699US6468436B1Method and system for providing a magnetoresistive head having higher efficiencyREAD RITE CORP·Filed 2000·Granted Oct 22, 2002·148 cites·6 claims
- 1798US8514506B1Disk drive comprising a dual read element and delay circuitry to improve read signalLI SHAOPING·Filed 2012·Granted Aug 20, 2013·158 cites·4 claims
- 1898US8385157B1Method and system for performing EAMR recording at high density using a large thermal spot sizeWESTERN DIGITAL TECH INC·Filed 2009·Granted Feb 26, 2013·155 cites·16 claims
- 1998US8139301B1Disk drive comprising a dual read element and delay circuitry to improve read signalLI SHAOPING·Filed 2009·Granted Mar 20, 2012·210 cites·8 claims
- 2098US7660080B1Read/write head with dynamic flying height control by magnetostrictionWESTERN DIGITAL FREMONT LLC·Filed 2004·Granted Feb 9, 2010·165 cites·57 claims
- 2198US7522379B1Write element with recessed pole and heat sink layer for ultra-high density writingWESTERN DIGITAL FREMONT LLC·Filed 2004·Granted Apr 21, 2009·158 cites·13 claims
- 2298US7239478B1Write element for perpendicular recording in a data storage systemWESTERN DIGITAL FREMONT INC·Filed 2004·Granted Jul 3, 2007·189 cites·87 claims
- 2398US7212384B1Magnetic read head with recessed hard bias and current leadsWESTERN DIGITAL FREMONT INC·Filed 2004·Granted May 1, 2007·156 cites·24 claims
- 2498US7126790B1Magnetic head for perpendicular recording with magnetic loop providing non-perpendicular write fieldWESTERN DIGITAL FREMONT INC·Filed 2003·Granted Oct 24, 2006·168 cites·37 claims
- 2598US7113366B1Double-nosed inductive transducer with reduced off-track writingWESTERN DIGITAL FREMONT INC·Filed 2002·Granted Sep 26, 2006·156 cites·6 claims
- 2698US6906894B2Write head having a recessed, magnetic adjunct pole formed atop a main pole, and method of making the sameWESTERN DIGITAL FREMONT INC·Filed 2004·Granted Jun 14, 2005·166 cites·19 claims
- 2798US6791793B1Perpendicular recording write head having a recessed magnetic adjunct pole and method of making the sameWESTERN DIGITAL FREMONT INC·Filed 2001·Granted Sep 14, 2004·193 cites·20 claims
- 2898US6724572B1Inductive transducer with recessed leading pole layerWESTERN DIGITAL INC·Filed 2002·Granted Apr 20, 2004·209 cites·24 claims
- 2998US6721138B1Inductive transducer with stitched pole tip and pedestal defining zero throat heightWESTERN DIGITAL FREMONT INC·Filed 2001·Granted Apr 13, 2004·187 cites·18 claims
- 3098US6459552B1Thin film read head with coplanar pole tipsFiled 2000·Granted Oct 1, 2002·155 cites·5 claims
- 3197US6137661ASystem for providing a magnetoresistive head having higher efficiencyREAD RITE CORP·Filed 1998·Granted Oct 24, 2000·154 cites·4 claims
- 3297US6073338AThin film read head with coplanar pole tipsREAD RITE CORP·Filed 1997·Granted Jun 13, 2000·161 cites·4 claims
- 3396US6989972B1Magnetoresistive sensor with overlapping leads having distributed currentWESTERN DIGITAL FREMONT INC·Filed 2002·Granted Jan 24, 2006·187 cites·15 claims
- 3496US6392850B1Magnetoresistive transducer having a common magnetic bias using assertive and complementary signalsREAD RITE CORP·Filed 1998·Granted May 21, 2002·155 cites·15 claims
- 3595US7508627B1Method and system for providing perpendicular magnetic recording transducersWESTERN DIGITAL FREMONT LLC·Filed 2006·Granted Mar 24, 2009·171 cites·30 claims
- 3693US5726841AThin film magnetic head with trimmed pole tips etched by focused ion beam for undershoot reductionREAD RITE CORP·Filed 1996·Granted Mar 10, 1998·104 cites·15 claims
- 3788US5705973ABias-free symmetric dual spin valve giant magnetoresistance transducerREAD RITE CORP·Filed 1996·Granted Jan 6, 1998·71 cites·7 claims
- 3883US5859754AMagnetoresistive transducer having a common magnetic bias using assertive and complementary signalsREAD RITE CORP·Filed 1997·Granted Jan 12, 1999·47 cites·9 claims
- 3978US5792547ALow noise magnetic head for high frequency recordingREAD RITE CORP·Filed 1996·Granted Aug 11, 1998·32 cites·14 claims
- 4074US5612098AMethod of forming a thin film magnetic structure having ferromagnetic and antiferromagnetic layersREAD RITE CORP·Filed 1996·Granted Mar 18, 1997·34 cites·23 claims
- 4160US5876848AThin film magnetic structure having ferromagnetic and antiferromagnetic layersREAD RITE CORP·Filed 1997·Granted Mar 2, 1999·18 cites·10 claims
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →