Inventor · disambiguated record
Sukumar Rajauria
Also filed as: Rajauria Sukumar
39 granted patents·4 pending applications·91 citations·filing 2015–2025
96Inventor score
Top patents by PatentIndex Score
43 records- 0194US11257525B1Data storage device predicting failure of near field transducer based on slope of thermal gradientWESTERN DIGITAL TECH INC·Filed 2021·Granted Feb 22, 2022·6 cites·17 claims
- 0294US10950266B1In-situ NFT pre-treatment to accumulate optically transparent material on NFT to improve reliabilityWESTERN DIGITAL TECH INC·Filed 2020·Granted Mar 16, 2021·5 cites·32 claims
- 0394US9601140B1In-situ smear detection and mitigation in heat-assisted magnetic recording head-disk interfaceHGST Netherlands BV·Filed 2016·Granted Mar 21, 2017·16 cites·20 claims
- 0492US11430482B1Data storage device detecting NFT contamination by measuring thermal gradient and magnetic write widthWESTERN DIGITAL TECH INC·Filed 2021·Granted Aug 30, 2022·4 cites·20 claims
- 0591US10950267B1HAMR media to assist optically transparent build-up on NFT to improve reliabilityWESTERN DIGITAL TECH INC·Filed 2020·Granted Mar 16, 2021·4 cites·20 claims
- 0690US11170814B1Heat treatment of NFT on heat-assisted magnetic recording deviceWESTERN DIGITAL TECH INC·Filed 2020·Granted Nov 9, 2021·3 cites·19 claims
- 0790US10910007B1Heat-assisted magnetic recording device capable of providing negative electrical potential at NFTWESTERN DIGITAL TECH INC·Filed 2020·Granted Feb 2, 2021·5 cites·14 claims
- 0889US10395678B1Method and system for determining slider-disk contact in a magnetic recording disk drive with dual fly-height actuatorsWESTERN DIGITAL TECH INC·Filed 2018·Granted Aug 27, 2019·9 cites·14 claims
- 0985US10699736B1Data storage device detecting abnormality with a write assist element based on slope of protrusionWESTERN DIGITAL TECH INC·Filed 2019·Granted Jun 30, 2020·6 cites·17 claims
- 1085US9595280B2Hard disk drive head-disk interface ditheringHGST Netherlands BV·Filed 2015·Granted Mar 14, 2017·8 cites·21 claims
- 1181US12159654B1Local extension of head overcoat with a near-field transducer extending toward the media-facing surfaceWESTERN DIGITAL TECH INC·Filed 2023·Granted Dec 3, 2024·1 cites·19 claims
- 1281US10650850B1Hard disk drive with write gap conductive structure and dual independent interface voltage control circuitryWESTERN DIGITAL TECH INC·Filed 2019·Granted May 12, 2020·4 cites·14 claims
- 1378US9595281B2Tunable contact detection sensitivity to directly measure clearance of protrusions in magnetic recording headsHGST Netherlands BV·Filed 2015·Granted Mar 14, 2017·4 cites·20 claims
- 1477US12142896B2Preheating laser diodes with reverse bias for HAMR disk drivesWESTERN DIGITAL TECH INC·Filed 2023·Granted Nov 12, 2024·0 cites·20 claims
- 1577US9401169B1Implementing enhanced ultrafast touchdown measurement scheme using thermal and voltage actuation for hard disk drivesHGST Netherlands BV·Filed 2015·Granted Jul 26, 2016·4 cites·20 claims
- 1676US12170435B2Managing laser diode cavity thermal transients in HAMR disk drivesWESTERN DIGITAL TECH INC·Filed 2023·Granted Dec 17, 2024·0 cites·26 claims
- 1776US11423939B1Data storage device detecting write pole degradation for magnetic write headWESTERN DIGITAL TECH INC·Filed 2021·Granted Aug 23, 2022·1 cites·23 claims
- 1874US10056098B1Data storage device employing multi-mode sensing circuitry for multiple head sensor elementsWESTERN DIGITAL TECH INC·Filed 2017·Granted Aug 21, 2018·3 cites·20 claims
- 1974US9460739B1Monitoring and controlling the electrochemical wear at the head-disk interfaceHGST Netherlands BV·Filed 2015·Granted Oct 4, 2016·3 cites·16 claims
- 2069US12283293B2Measuring laser diode temperature and predicting mode hops using laser diode resistanceWESTERN DIGITAL TECH INC·Filed 2023·Granted Apr 22, 2025·0 cites·19 claims
- 2167US10783913B1Data storage device measuring air bearing resonant frequency to calibrate fly height touchdown powerWESTERN DIGITAL TECH INC·Filed 2019·Granted Sep 22, 2020·2 cites·19 claims
- 2266US10354680B2Using window underlayer structures to protect near field transducers on heat assisted magnetic recording headsWESTERN DIGITAL TECH INC·Filed 2018·Granted Jul 16, 2019·1 cites·20 claims
- 2365US12424248B2Devices and methods for metal organic framework (MOF) based oxygen replenishment in data storage devicesWESTERN DIGITAL TECH INC·Filed 2023·Granted Sep 23, 2025·0 cites·17 claims
- 2464US12354630B1Reducing laser diode temperature swings in heat-assisted magnetic recording (HAMR) using a slider-mounted heat sinkWESTERN DIGITAL TECH INC·Filed 2024·Granted Jul 8, 2025·0 cites·21 claims
- 2564US12198737B1Temperature control of a laser diode by applying reverse bias in a data storage device configured for heat-assisted magnetic recordingWESTERN DIGITAL TECH INC·Filed 2023·Granted Jan 14, 2025·0 cites·20 claims
- 2663US12125509B1Dark laser heating by positive pulse biasing in heat assisted magnetic recordingWESTERN DIGITAL TECH INC·Filed 2023·Granted Oct 22, 2024·0 cites·20 claims
- 2763US2025308548A1Laser heater feedback control in heat assisted magnetic recordingWESTERN DIGITAL TECH INC·Filed 2025·Application pending·0 cites
- 2862US11881230B2Heat treatment of NFT and surrounding materialWESTERN DIGITAL TECH INC·Filed 2021·Granted Jan 23, 2024·0 cites·19 claims
- 2962US11244703B2In-situ NFT pre-treatment to accumulate optically transparent material on NFT to improve reliabilityWESTERN DIGITAL TECH INC·Filed 2021·Granted Feb 8, 2022·0 cites·18 claims
- 3062US9947346B2Using window underlayer structures to protect near field transducers on heat assisted magnetic recording headsHGST Netherlands BV·Filed 2016·Granted Apr 17, 2018·1 cites·18 claims
- 3161US10283145B2Electromagnetically-shielded near-field transducer thermal sensor for heat-assisted magnetic recordingWESTERN DIGITAL TECH INC·Filed 2017·Granted May 7, 2019·1 cites·20 claims
- 3259US12190908B2Near-field transducer (NFT) designs for improved performance of heat-assisted magnetic recording (HAMR)WESTERN DIGITAL TECH INC·Filed 2023·Granted Jan 7, 2025·0 cites·25 claims
- 3359US11783854B1Data storage device with detection and mitigation of non-nominal head heat dissipationWESTERN DIGITAL TECH INC·Filed 2022·Granted Oct 10, 2023·0 cites·20 claims
- 3458US11934687B2Full disk serpentine write path for tamper-proof disk driveWESTERN DIGITAL TECH INC·Filed 2022·Granted Mar 19, 2024·0 cites·21 claims
- 3557US12165681B1Touchdown detection and write-spacing setting in magnetic recording heads with protruding featuresWESTERN DIGITAL TECH INC·Filed 2023·Granted Dec 10, 2024·0 cites·21 claims
- 3656US12406699B1Passive and active gas compensation techniques for data storage devicesWESTERN DIGITAL TECH INC·Filed 2024·Granted Sep 2, 2025·0 cites·26 claims
- 3756US12300285B1Measuring NFT protrusion in a heat assisted magnetic recording drive using burst writing and a constant laser diode temperatureWESTERN DIGITAL TECH INC·Filed 2024·Granted May 13, 2025·0 cites·20 claims
- 3856US11694722B1Data timestamp and read counter for magnetic recording devicesWESTERN DIGITAL TECH INC·Filed 2022·Granted Jul 4, 2023·0 cites·19 claims
- 3954US12159653B1Data storage device with laser write bias optimization using disk thermal-magnetic response mapping in heat-assisted magnetic recordingWESTERN DIGITAL TECH INC·Filed 2023·Granted Dec 3, 2024·0 cites·20 claims
- 4050US12417786B1Thermal fly height calibration for data storage deviceWESTERN DIGITAL TECH INC·Filed 2024·Granted Sep 16, 2025·0 cites·20 claims
- 4148US2025007238A1Steady state laser diode fingerprint measurement and compensationWESTERN DIGITAL TECH INC·Filed 2023·Application pending·0 cites
- 4243US2023238023A1Heat-assisted magnetic recording (hamr) media with dual-layer media carbon overcoatWESTERN DIGITAL TECH INC·Filed 2023·Application pending·0 cites
- 4333US2017004853A1Implementing enhanced in-situ monitoring of head overcoat wear for controlled burnishing and early detection of head failure in hddHGST Netherlands BV·Filed 2015·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →