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For the Inventor, By the Inventor

San Jose, CA, United States of America

Yongchul Ahn

This inventor holds 20 USPTO granted patents and 4 published patent applications, primarily in Spintronics Technology. Top assignees: Western Digital Technologies, Inc., Hgst Netherlands, B.v.. Active years: 2013-2026.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Yongchul Ahn. Retrieved from https://idiyas.com/inventor/yongchul-ahn

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

Calculating rank
USPTO Granted Patents = 20 

% Patents Active = 85.0

Average Co-Inventor Count = 6.2

ph-index = 5

Forward Citations = 76(Granted Patents)


Company Filing History:

goldMedal15 out of 5,432 
 
Western Digital Technologies, Inc.
 patents
silverMedal5 out of 987 
 
Hgst Netherlands, B.v.
 patents

Years Active: 2013-2026

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Areas of Expertise:
Spintronics
Magnetic Sensors
Spin Torque Oscillators
Topological Insulators
Non-Volatile Memory
Magnetic Memory Devices
Self-Cooling Function
Anisotropy Field
Magnetic Bias Structure
Patterned Decoupling Layer
Sb Diffusion Prevention
Shape Enhanced Pin Read Head
20 patents (USPTO):Explore Patents
1. 12597437 - Rear soft bias dual free layer sensor with patterned decoupling layer (2026-04-07),
2. 12527232 - BiSb topological insulator with seed layer or interlayer to prevent Sb diffusion and promote BiSb (012) orientation (2026-01-13),
3. 12314842 - Matrix-vector multiplication using SOT-based non-volatile memory cells (2025-05-27),
4. 11925120 - Spintronic devices with self-cooling function (2024-03-05),
5. 11862205 - Spin torque oscillator with multilayer seed for improved performance and reliability (2024-01-02),
6. 11489108 - BiSb topological insulator with seed layer or interlayer to prevent sb diffusion and promote BiSb (012) orientation (2022-11-01),
7. 11393516 - SOT-based spin torque oscillators for oscillatory neural networks (2022-07-19),
8. 11283008 - Apparatus and methods for magnetic memory devices with magnetic assist layer (2022-03-22),
9. 10943611 - Spintronic devices with narrow spin polarization layers (2021-03-09),
10. 10872627 - Reversed mode spin torque oscillator with shaped field generation layer (2020-12-22),
11. 10839845 - Magnetic sensors with effectively shaped side shields (2020-11-17),
12. 10762917 - Reversed mode spin torque oscillator with shaped field generation layer (2020-09-01),
13. 10720570 - Magnetic sensor using spin hall effect (2020-07-21),
14. 10381032 - Magnetic sensors with effectively shaped side shields (2019-08-13),
15. 10311901 - Anisotropy field induced self pinned recessed antiferromagnetic reader (2019-06-04),

Title: The Innovative Mind of Yongchul Ahn

Introduction

Yongchul Ahn is a distinguished inventor based in San Jose, CA, who has made substantial contributions to the field of spintronics. With a remarkable portfolio of 17 patents, he continues to push the boundaries of technology through his innovative designs and applications.

Latest Patents

Among his latest inventions are groundbreaking advancements in spintronic devices. One of his notable patents is for **self-cooling spintronic devices**, which includes a unique configuration with a first layer and a second layer, each having different Seebeck coefficients. This self-cooling feature has significant implications for enhancing the performance of modern electronic systems.

Another patent highlights his work on a **spin torque oscillator**, which incorporates a multilayer seed for improved performance and reliability. This invention features a magnetic recording device with a spintronic configuration positioned strategically between a main pole and a trailing shield. The inclusion of a multilayer seed layer and a cooling layer, composed of materials like Ruthenium (Ru) and Chromium (Cr), showcases his innovative approach to optimizing device efficiency and manufacturing processes.

Career Highlights

Yongchul Ahn has held positions in prominent companies such as Western Digital Technologies, Inc. and HGST Netherlands B.V. His tenure at these organizations has allowed him to collaborate on cutting-edge technologies, leading to the impressive array of patents he currently holds.

Collaborations

Throughout his career, Ahn has worked alongside talented professionals like Quang Le and Xiaoyong Liu. Their collaborative efforts have played a crucial role in developing advanced spintronic devices and furthering innovations in the field.

Conclusion

Yongchul Ahn's contributions to spintronics and his impressive patent portfolio reflect his commitment to innovation and excellence. As technology continues to evolve, his inventions will undoubtedly leave a lasting impact on the industry and inspire future generations of inventors.

Profile summary based on public USPTO records.
Data Sources: USPTO Patent Grant XML, Patent Center, EPO & CIPO • Normalized by IDiyas Innovation Graph. Methodology & provenance architecturePlease report any incorrect information to [email protected]
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