Inventor · disambiguated record
Ching Hwa Tsang
Also filed as: TSANG CHING · TSANG CHING H · TSANG CHING HWA
71 granted patents·5 pending applications·3,155 citations·filing 1982–2017
99Inventor score
Top patents by PatentIndex Score
76 records- 0198US9953692B1Spin orbit torque MRAM memory cell with enhanced thermal stabilitySANDISK TECHNOLOGIES LLC·Filed 2017·Granted Apr 24, 2018·46 cites·22 claims
- 0298US6023395AMagnetic tunnel junction magnetoresistive sensor with in-stack biasingIBM·Filed 1998·Granted Feb 8, 2000·235 cites·28 claims
- 0398US5898548AShielded magnetic tunnel junction magnetoresistive read headIBM·Filed 1997·Granted Apr 27, 1999·190 cites·26 claims
- 0498US5701223ASpin valve magnetoresistive sensor with antiparallel pinned layer and improved exchange bias layer, and magnetic recording system using the sensorIBM·Filed 1996·Granted Dec 23, 1997·214 cites·20 claims
- 0598US4663685AMagnetoresistive read transducer having patterned longitudinal biasIBM·Filed 1985·Granted May 5, 1987·174 cites·18 claims
- 0697US5898547AMagnetic tunnel junction magnetoresistive read head with sensing layer as flux guideIBM·Filed 1997·Granted Apr 27, 1999·150 cites·31 claims
- 0797US5508866AMagnetoresistive sensor having exchange-coupled stabilization for transverse bias layerIBM·Filed 1994·Granted Apr 16, 1996·97 cites·25 claims
- 0897US5438747AMethod of making a thin film merged MR head with aligned pole tipsIBM·Filed 1994·Granted Aug 8, 1995·230 cites·28 claims
- 0996US7580230B2Magnetoresistive sensor having shape enhanced pinning, a flux guide structure and damage free virtual edgesHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Aug 25, 2009·25 cites·5 claims
- 1096US7522391B2Current perpendicular to plane magnetoresistive sensor having a shape enhanced pinned layer and an in stack bias structureHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Apr 21, 2009·32 cites·21 claims
- 1196US7369371B2Magnetoresistive sensor having a shape enhanced pinned layerHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted May 6, 2008·28 cites·21 claims
- 1296US6847510B2Magnetic tunnel junction device with bottom free layer and improved underlayerHITACHI GLOBAL STORAGE TECH·Filed 2002·Granted Jan 25, 2005·66 cites·19 claims
- 1396US6680832B2CPP magnetoresistive sensors with in-stack longitudinal biasing and overlapping magnetic shieldIBM·Filed 2001·Granted Jan 20, 2004·72 cites·9 claims
- 1496US6114719AMagnetic tunnel junction memory cell with in-stack biasing of the free ferromagnetic layer and memory array using the cellIBM·Filed 1998·Granted Sep 5, 2000·213 cites·37 claims
- 1595US5901018AMagnetic tunnel junction magnetoresistive read head with sensing layer as rear flux guideIBM·Filed 1997·Granted May 4, 1999·110 cites·26 claims
- 1695US5452163AMultilayer magnetoresistive sensorIBM·Filed 1993·Granted Sep 19, 1995·128 cites·89 claims
- 1794US6005753AMagnetic tunnel junction magnetoresistive read head with longitudinal and transverse biasIBM·Filed 1998·Granted Dec 21, 1999·120 cites·20 claims
- 1893US7161773B2High linear density tunnel junction flux guide read head with in-stack longitudinal bias stack (LBS)HITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 9, 2007·22 cites·2 claims
- 1992US9001473B1TMR/CPP reader for narrow reader gap applicationHGST Netherlands BV·Filed 2014·Granted Apr 7, 2015·17 cites·20 claims
- 2092US6671139B2In-stack longitudinal bias structure for CIP spin valve sensors with bias layer electrically insulated from free layerIBM·Filed 2002·Granted Dec 30, 2003·43 cites·18 claims
- 2192US6631055B2Tunnel valve flux guide structure formed by oxidation of pinned layerIBM·Filed 2001·Granted Oct 7, 2003·34 cites·29 claims
- 2292US5528440ASpin valve magnetoresistive element with longitudinal exchange biasing of end regions abutting the free layer, and magnetic recording system using the elementIBM·Filed 1994·Granted Jun 18, 1996·95 cites·9 claims
- 2391US6156375AMethod of making read/write magnetoresistive (MR) head with sunken componentsIBM·Filed 1999·Granted Dec 5, 2000·59 cites·42 claims
- 2491US5492720AMethod of manufacturing a magnetoresistive sensorIBM·Filed 1995·Granted Feb 20, 1996·63 cites·15 claims
- 2591US5285339AMagnetoresistive read transducer having improved bias profileIBM·Filed 1992·Granted Feb 8, 1994·55 cites·19 claims
- 2691US4771349AMagnetoresistive read transducerIBM·Filed 1986·Granted Sep 13, 1988·45 cites·6 claims
- 2790US4809109AMagnetoresistive read transducer and method for making the improved transducerIBM·Filed 1988·Granted Feb 28, 1989·56 cites·8 claims
- 2889US7663846B2Magnetoresistive sensor having an enhanced lead overlay design and shape enhanced pinningHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Feb 16, 2010·17 cites·34 claims
- 2989US7420787B2Magnetoresistive sensor having a shape enhanced pinned layerHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Sep 2, 2008·17 cites·8 claims
- 3089US7253991B2Planar perpendicular recording headHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Aug 7, 2007·25 cites·11 claims
- 3187US7324313B2Read sensor having an in-stack biasing structure and an AP coupled free layer structure for increased magnetic stabilityHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Jan 29, 2008·20 cites·39 claims
- 3287US5262904AMethod and apparatus for measuring and compensating nonlinear bitshiftIBM·Filed 1991·Granted Nov 16, 1993·41 cites·29 claims
- 3385US7652855B2Magnetic sensor with extended free layer and overlaid leadsHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jan 26, 2010·6 cites·17 claims
- 3485US7463459B2Self-pinned read sensor design with enhanced lead stabilizing mechanismHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Dec 9, 2008·18 cites·15 claims
- 3584US7245459B2Critically exposed lapping of magnetic sensors for target signal outputHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Jul 17, 2007·17 cites·21 claims
- 3684US5664316AMethod of manufacturing magnetoresistive read transducer having a contiguous longitudinal bias layerIBM·Filed 1995·Granted Sep 9, 1997·57 cites·14 claims
- 3783US5262914AMagnetoresistive head with enhanced exchange bias fieldIBM·Filed 1991·Granted Nov 16, 1993·28 cites·7 claims
- 3882US7317596B2Magnetic recording disk drive having read head with high cross-track resolution and disk with low bit-aspect-ratioHITACHI GLOBAL STORAGE TECH·Filed 2005·Granted Jan 8, 2008·9 cites·20 claims
- 3981US7606065B2Three-dimensional magnetic memory having bits transferrable between storage layersHITACHI GLOBAL STORAGE TECH·Filed 2008·Granted Oct 20, 2009·9 cites·30 claims
- 4081US6833976B2Thin film magnetic recording inductive write head with laminated write gapIBM·Filed 2002·Granted Dec 21, 2004·12 cites·25 claims
- 4180US7043823B2Method of manufacturing a current-perpendicular-to-plane magnetoresistive device with oxidized free layer side regionsIBM·Filed 2004·Granted May 16, 2006·19 cites·24 claims
- 4278US7388776B1Three-dimensional magnetic memoryHITACHI GLOBAL STORAGE TECH·Filed 2006·Granted Jun 17, 2008·8 cites·54 claims
- 4378US6025977ACombined magnetoresistive (MR) read and inductive write head with sunken write coilIBM·Filed 1997·Granted Feb 15, 2000·28 cites·6 claims
- 4478US5282308AThin film planarization process for fabricating magnetic heads employing a stitched pole structureIBM·Filed 1992·Granted Feb 1, 1994·37 cites·8 claims
- 4572US6888705B2High linear density tunnel junction flux guide read head with in-stack longitudinal bias stack (LBS)HITACHI GLOBAL STORAGE TECH·Filed 2002·Granted May 3, 2005·14 cites·14 claims
- 4671US7764469B2Notched shield and pole structure with slanted wing for perpendicular recordingHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Jul 27, 2010·7 cites·29 claims
- 4771US7649711B2Double notched shield and pole structure for stray field reduction in a magnetic headHITACHI GLOBAL STORAGE TECH·Filed 2004·Granted Jan 19, 2010·7 cites·20 claims
- 4870US5458908AMethod of fabricating a magnetoresistive read transducerIBM·Filed 1994·Granted Oct 17, 1995·19 cites·10 claims
- 4969US6175475B1Fully-pinned, flux-closed spin valveIBM·Filed 1998·Granted Jan 16, 2001·29 cites·35 claims
- 5068US5444589ARotary actuator disk drive with identical dual-element read/write transducersIBM·Filed 1993·Granted Aug 22, 1995·18 cites·14 claims
Showing the top 50 of 76 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →