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For the Inventor, By the Inventor

Hong Kong, China

Won Choul Yang

USPTO Granted Patents = 11

Average Co-Inventor Count = 2.4

ph-index = 5

Forward Citations = 76(Granted Patents)


Company Filing History:

goldMedal11 out of 8,682 
 
Seagate Technology Incorporated
 patents

Years Active: 2015-2018

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11 patents (USPTO):Explore Patents
1. 10043540 - Health monitoring for head of a heat-magnetic recording device using a writer-reader offset (2018-08-07),
2. 9741378 - Health monitoring for head of a heat-assisted magnetic recording device using a writer-reader offset (2017-08-22),
3. 9607642 - Head-medium contact detection using a thermal sensor and surface charge control of a slider (2017-03-28),
4. 9472229 - Adaptive laser output control in a HAMR device (2016-10-18),
5. 9437234 - Head-medium contact detection using high frequency heater oscillation (2016-09-06),
6. 9355671 - Controlling laser output in a HAMR device (2016-05-31),
7. 9245561 - Apparatus and method for measuring surface charge of a slider (2016-01-26),
8. 9195533 - Addressing variations in bit error rates amongst data storage segments (2015-11-24),
9. 9153272 - Characterizing laser output in a HAMR device (2015-10-06),
10. 8934188 - Adaptive write pole tip protrusion compensation (2015-01-13),
11. 8934185 - Storage device head instability recovery by heating from head heater (2015-01-13),

Title: Innovations of Won Choul Yang

Introduction

Won Choul Yang is a prominent inventor based in Hong Kong, CN. He has made significant contributions to the field of heat-assisted magnetic recording technology. With a total of 11 patents to his name, Yang continues to push the boundaries of innovation in his industry.

Latest Patents

One of Yang's latest patents focuses on health monitoring for the head of a heat-magnetic recording device using a writer-reader offset. This method involves moving a heat-assisted magnetic recording head relative to a magnetic recording medium that comprises a plurality of tracks. The head includes a reader and a writer, which features a near-field transducer (NFT) optically coupled to a laser diode. The writer is designed with a center that is laterally offset from the center of the reader, defining a writer-reader offset (WRO) between them. Patterns are written to a specific track at various laser diode current levels. The patterns are then read, and a WRO value is calculated at a peak amplitude position for each of the laser diode current levels. A slope of the WRO values is determined in relation to the laser current diode levels. The health condition of the NFT is assessed by checking if the slope exceeds a predetermined threshold, indicating non-uniform activation across the NFT.

Career Highlights

Yang is currently employed at Seagate Technology Incorporated, where he applies his expertise in magnetic recording technologies. His work has been instrumental in advancing the capabilities of data storage solutions.

Collaborations

Throughout his career, Yang has collaborated with notable colleagues, including Shi Jung Kim and Ju Yong Lee. These partnerships have fostered innovation and contributed to the development of cutting-edge technologies in their field.

Conclusion

Won Choul Yang is a distinguished inventor whose work in heat-assisted magnetic recording technology has led to numerous patents and advancements in the industry. His contributions continue to shape the future of data storage solutions.

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