Inventor · disambiguated record
Yanning Liu
Also filed as: LIU YANNING
50 granted patents·8 pending applications·1,375 citations·filing 2001–2025
98Inventor score
Files withWESTERN DIGITAL TECH INC34LIU YANNING6SEAGATE TECHNOLOGY LLC4SHUM WING C3SAMSUNG ELECTRONICS CO LTD2
Top patents by PatentIndex Score
58 records- 0198US8605384B1Disk drive performing lifetime logging of microactuator sensitivityWESTERN DIGITAL TECH INC·Filed 2012·Granted Dec 10, 2013·110 cites·24 claims
- 0298US8542465B2Suspension assembly having a microactuator electrically connected to a gold coating on a stainless steel surfaceLIU YANNING·Filed 2010·Granted Sep 24, 2013·93 cites·18 claims
- 0398US8144419B1Disk drive detecting head touchdown from microactuator signalLIU YANNING·Filed 2010·Granted Mar 27, 2012·142 cites·22 claims
- 0497US11456009B1Shared disk configuration in a multiple actuator hard disk driveWESTERN DIGITAL TECH INC·Filed 2021·Granted Sep 27, 2022·8 cites·20 claims
- 0597US8605383B1Methods, devices and systems for characterizing polarities of piezoelectric (PZT) elements of a two PZT element microactuatorWANG XIN·Filed 2012·Granted Dec 10, 2013·26 cites·20 claims
- 0697US8325446B1Disk drive head gimbal assembly having a flexure tail with features to facilitate bondingLIU YANNING·Filed 2011·Granted Dec 4, 2012·76 cites·38 claims
- 0797US8300348B1Disk drive detecting disk boundaries using microactuatorLIU YANNING·Filed 2010·Granted Oct 30, 2012·110 cites·24 claims
- 0897US8295014B1Disk drive head gimbal assembly having a flexure tail with transverse flying leadsTEO KIA MOH·Filed 2011·Granted Oct 23, 2012·63 cites·19 claims
- 0996US8780504B1Disk drive head suspension assembly with load beam inner rails between piezo actuator elementsWESTERN DIGITAL TECH INC·Filed 2013·Granted Jul 15, 2014·48 cites·24 claims
- 1096US8760814B1Disk drive head suspension assembly having a DLC coating between dimple and tongueWESTERN DIGITAL TECH INC·Filed 2013·Granted Jun 24, 2014·47 cites·18 claims
- 1196US8760812B1Disk drive head gimbal assembly having a jumper in a flexible printed circuit overlap regionWESTERN DIGITAL TECH INC·Filed 2013·Granted Jun 24, 2014·50 cites·16 claims
- 1296US8665567B2Suspension assembly having a microactuator grounded to a flexureSHUM WING C·Filed 2010·Granted Mar 4, 2014·60 cites·24 claims
- 1396US8339748B2Suspension assembly having a microactuator bonded to a flexureSHUM WING C·Filed 2010·Granted Dec 25, 2012·95 cites·18 claims
- 1496US8320084B1Disk drive head gimbal assembly having a flexure tail with features to facilitate bondingSHUM WING C·Filed 2011·Granted Nov 27, 2012·73 cites·30 claims
- 1595US8797689B1Disk drive head suspension assembly with piezo element stress relief featuresWESTERN DIGITAL TECH INC·Filed 2012·Granted Aug 5, 2014·50 cites·21 claims
- 1695US8792213B1Tethered gimbal on suspension for improved flyabilityWESTERN DIGITAL TECH INC·Filed 2013·Granted Jul 29, 2014·48 cites·18 claims
- 1795US8208224B1Suspension assemblies for minimizing stress on slider solder jointsTEO KIA MOH·Filed 2011·Granted Jun 26, 2012·53 cites·17 claims
- 1894US8693144B1Head gimbal assemblies and methods for measuring slider parametersWESTERN DIGITAL TECH INC·Filed 2013·Granted Apr 8, 2014·38 cites·20 claims
- 1994US8335049B1Disk drive detecting crack in microactuatorLIU YANNING·Filed 2010·Granted Dec 18, 2012·44 cites·24 claims
- 2090US8499652B1Test ramp for testing microactuators used in a multi-head disk driveTRAN GREGORY·Filed 2010·Granted Aug 6, 2013·49 cites·10 claims
- 2189US9330695B1Disk drive head suspension tail with a noble metal layer disposed on a plurality of structural backing islandsWESTERN DIGITAL TECH INC·Filed 2015·Granted May 3, 2016·9 cites·13 claims
- 2289US7203019B1Latch apparatus for latching an actuator arm assembly in a disk driveMAXTOR CORP·Filed 2005·Granted Apr 10, 2007·12 cites·25 claims
- 2387US8908332B2Suspension assembly having a microactuator grounded to a flexureWESTERN DIGITAL TECH INC·Filed 2014·Granted Dec 9, 2014·5 cites·16 claims
- 2484US8547657B1Disk drive detecting defective microactuatorLIU YANNING·Filed 2010·Granted Oct 1, 2013·23 cites·28 claims
- 2583US7443634B2Asymmetrical storage disk for a disk driveSEAGATE TECHNOLOGY LLC·Filed 2007·Granted Oct 28, 2008·4 cites·26 claims
- 2680US9324344B1Disk drive head suspension tail with ground pad outside of bonding regionWESTERN DIGITAL TECH INC·Filed 2014·Granted Apr 26, 2016·4 cites·7 claims
- 2779US9076473B1Data storage device detecting fly height instability of head during load operation based on microactuator responseWESTERN DIGITAL TECH INC·Filed 2014·Granted Jul 7, 2015·4 cites·34 claims
- 2878US9230580B1Suspension assembly having a microactuator grounded to a flexureWESTERN DIGITAL TECH INC·Filed 2014·Granted Jan 5, 2016·2 cites·16 claims
- 2976US8902538B1Disk drive detecting crack in microactuatorWESTERN DIGITAL TECH INC·Filed 2013·Granted Dec 2, 2014·4 cites·24 claims
- 3075US11482254B2Data storage device independently driving outer and inner fine actuatorsWESTERN DIGITAL TECH INC·Filed 2021·Granted Oct 25, 2022·1 cites·20 claims
- 3175US11482246B2Data storage device independently driving outer and inner fine actuatorsWESTERN DIGITAL TECH INC·Filed 2021·Granted Oct 25, 2022·1 cites·17 claims
- 3271US10381030B1Data storage device controlling dual stage actuator with triple stage servo loopWESTERN DIGITAL TECH INC·Filed 2018·Granted Aug 13, 2019·2 cites·11 claims
- 3370US8144421B2Radial position seek tuning for acoustic performanceSUN YU·Filed 2007·Granted Mar 27, 2012·1 cites·25 claims
- 3470US7227717B1Asymmetric disk surface properties in one head disk drivesSEAGATE TECHNOLOGY LLC·Filed 2002·Granted Jun 5, 2007·6 cites·58 claims
- 3568US9099131B1Suspension assembly having a microactuator electrically connected to a gold coating on a stainless steel surfaceWESTERN DIGITAL TECH INC·Filed 2013·Granted Aug 4, 2015·1 cites·3 claims
- 3667US6598717B1Active-passive hybrid constrained layer for structural damping augmentationPENN STATE RES FOUND·Filed 2001·Granted Jul 29, 2003·12 cites·17 claims
- 3766US2025292792A1Hard disk drive suspension fine actuator with miniaturized single-layer piezoelectric elementsWESTERN DIGITAL TECH INC·Filed 2025·Application pending·0 cites
- 3859US9564156B1Head gimbal assembly having a flexure tail with cover layer standoff islandsWESTERN DIGITAL TECH INC·Filed 2016·Granted Feb 7, 2017·1 cites·24 claims
- 3959US7633707B2Passive test circuit used to determine a back EMF of a voice coil motor during application of a bias voltageSAMSUNG ELECTRONICS CO LTD·Filed 2008·Granted Dec 15, 2009·0 cites·11 claims
- 4057US12361968B1Servo interface circuitry for parallel self-servo writeWESTERN DIGITAL TECH INC·Filed 2024·Granted Jul 15, 2025·0 cites·21 claims
- 4156US12513552B2Method and apparatus for detecting event in communication networkERICSSON TELEFON AB L M·Filed 2020·Granted Dec 30, 2025·0 cites·18 claims
- 4256US8913342B1Data storage device adjusting range of microactuator digital-to-analog converter based on operating temperatureWESTERN DIGITAL TECH INC·Filed 2014·Granted Dec 16, 2014·0 cites·12 claims
- 4353US12354632B1Parallel self-servo write in a data storage deviceWESTERN DIGITAL TECH INC·Filed 2024·Granted Jul 8, 2025·0 cites·22 claims
- 4452US12361970B1Parallel self-servo write circuitry in a data storage deviceWESTERN DIGITAL TECH INC·Filed 2024·Granted Jul 15, 2025·0 cites·20 claims
- 4551US2012188664A1Radial position seek tuning for acoustic performanceSUN YU·Filed 2012·Application pending·0 cites
- 4650US12361965B1Preamplifier circuit for parallel self-servo writeWESTERN DIGITAL TECH INC·Filed 2024·Granted Jul 15, 2025·0 cites·20 claims
- 4750US11227630B2Swage plate assembly with swage boss insertWESTERN DIGITAL TECH INC·Filed 2020·Granted Jan 18, 2022·0 cites·19 claims
- 4850US9472218B2Suspension assembly having a microactuator electrically connected to a gold coating on a stainless steel surfaceWESTERN DIGITAL TECH INC·Filed 2015·Granted Oct 18, 2016·0 cites·4 claims
- 4950US2025266059A1Fine actuator reaction force cancellation flexible suspensionWESTERN DIGITAL TECH INC·Filed 2024·Application pending·0 cites
- 5049US7548391B2Temperature-adaptive open-loop control of active latchSEAGATE TECHNOLOGY LLC·Filed 2007·Granted Jun 16, 2009·0 cites·18 claims
Showing the top 50 of 58 patent records by PatentIndex Score.
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →