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Sukumar Rajauria

This inventor holds 40 USPTO granted patents and 4 published patent applications, primarily in Heat-Assisted Magnetic Recording. Top assignees: Western Digital Technologies, Inc., Hgst Netherlands, B.v.. Active years: 2016-2026.

USPTO Granted Patents = 40 (Patent Applications = 4)

% Patents Active = 97.5

Average Co-Inventor Count = 3.0

ph-index = 4

Forward Citations = 81(Granted Patents)

Company Filing History:

38 out of 5,419

Western Digital Technologies, Inc.

patents

2 out of 987

Hgst Netherlands, B.v.

patents

Years Active: 2016-2026

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Areas of Expertise:

Heat-Assisted Magnetic Recording

Near-Field Transducer

Laser Diode Temperature Control

Data Storage Devices

Thermal Calibration

Magnetic Recording Heads

Optically Transparent Material

Data Timestamp

Write Assist Element

Electromagnetic Shielding

Thermal Gradient

Fly Height Calibration

40 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 12688864 - Data storage device shaping read thermal sensor bias signal to balance write thermal sensor signal during laser operation (2026-07-21),

2. 12424248 - Devices and methods for metal organic framework (MOF) based oxygen replenishment in data storage devices (2025-09-23),

3. 12417786 - Thermal fly height calibration for data storage device (2025-09-16),

4. 12406699 - Passive and active gas compensation techniques for data storage devices (2025-09-02),

5. 12354630 - Reducing laser diode temperature swings in heat-assisted magnetic recording (HAMR) using a slider-mounted heat sink (2025-07-08),

6. 12300285 - Measuring NFT protrusion in a heat assisted magnetic recording drive using burst writing and a constant laser diode temperature (2025-05-13),

7. 12283293 - Measuring laser diode temperature and predicting mode hops using laser diode resistance (2025-04-21),

8. 12198737 - Temperature control of a laser diode by applying reverse bias in a data storage device configured for heat-assisted magnetic recording (2025-01-14),

9. 12190908 - Near-field transducer (NFT) designs for improved performance of heat-assisted magnetic recording (HAMR) (2025-01-07),

10. 12170435 - Managing laser diode cavity thermal transients in HAMR disk drives (2024-12-17),

11. 12165681 - Touchdown detection and write-spacing setting in magnetic recording heads with protruding features (2024-12-10),

12. 12159654 - Local extension of head overcoat with a near-field transducer extending toward the media-facing surface (2024-12-03),

13. 12159653 - Data storage device with laser write bias optimization using disk thermal-magnetic response mapping in heat-assisted magnetic recording (2024-12-03),

14. 12142896 - Preheating laser diodes with reverse bias for HAMR disk drives (2024-11-12),

15. 12125509 - Dark laser heating by positive pulse biasing in heat assisted magnetic recording (2024-10-22),

Title: Innovator Spotlight: Sukumar Rajauria

Introduction: Sukumar Rajauria, a prolific inventor based in San Jose, CA, has made significant contributions in the field of data storage technologies, holding an impressive portfolio of 25 patents.

Latest Patents:

1. "Full disk serpentine write path for tamper-proof disk drive": Rajauria's innovative approach in multi-disk drive design enhances data security by disabling write access to specific media surfaces, ensuring tamper-proof data storage.

2. "Heat treatment of NFT and surrounding material": His work on conditioning the Near Field Transducer (NFT) in a magnetic recording head improves the longevity of the head by preventing thermal shock and fatigue.

Career Highlights: Rajauria has been instrumental in advancing data storage technologies through his roles at Western Digital Technologies, Inc. and HGST Netherlands B.V., where he played a pivotal role in research and development.

Collaborations: Rajauria has collaborated with esteemed professionals in the industry, including Erhard Theodor Schreck and Robert Lee Smith, further enriching his innovative endeavors and contributing to the advancement of data storage solutions.

Conclusion: Sukumar Rajauria's groundbreaking work in data storage technologies exemplifies his commitment to innovation and excellence, solidifying his position as a leading inventor in the field. His patents and collaborations stand as a testament to his profound impact on the industry.

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