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For the Inventor, By the Inventor

Hiratsuka, Japan

Kouichi Nishioka

This inventor holds 21 USPTO granted patents, primarily in Magnetoresistive Sensors. Top assignees: Hgst Netherlands, B.v., Hitachi, Ltd., Hitachi Global Storage Technologies Netherlands B.v.. Active years: 1990-2018.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kouichi Nishioka. Retrieved from https://idiyas.com/inventor/kouichi-nishioka

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

Calculating rank
USPTO Granted Patents = 21

% Patents Active = 71.4

Average Co-Inventor Count = 3.5

ph-index = 8

Forward Citations = 164(Granted Patents)


Location History:

  • Hitachi, JP (1990 - 1993)
  • Kanagawa, JP (2009)
  • Hiratsuka, JP (1994 - 2018)

Company Filing History:

goldMedal10 out of 987 
 
Hgst Netherlands, B.v.
 patents
silverMedal6 out of 42,743 
 
Hitachi, Ltd.
 patents
bronzeMedal4 out of 2,636 
 
Hitachi Global Storage Technologies Netherlands B.v.
 patents
4. 1 out of 5,432 
 
Western Digital Technologies, Inc.
 patents

Years Active: 1990-2018

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Areas of Expertise:
Tunnel Magnetoresistance
Magnetic Sensor
Read Head Stability
Antiferromagnetic Grain Growth
Random Telegraph Noise
Pinned Layer Robustness
Multi-Sensor Head
Thermal Stability
Thin Film Magnetic Head
Magnetoresistance Effect
Current-Perpendicular-To-The-Plane
Magnetic Alloy
21 patents (USPTO):Explore Patents
1. 9940955 - Tunnel magnetoresistance magnetic sensor with scissor sensor and multi-seed layer configuration (2018-04-10),
2. 9349397 - Higher stability read head utilizing a partial milling process (2016-05-24),
3. 9343090 - Magnetoresistive sensor having an Ir seed layer for improved pinned layer robustness (2016-05-17),
4. 9341685 - Antiferromagnetic (AFM) grain growth controlled random telegraph noise (RTN) suppressed magnetic head (2016-05-17),
5. 9269383 - Multi-sensor (MIMO) head having a back side antiferromagnetic middle shield (2016-02-23),
6. 9245549 - Thermally stable low random telegraph noise sensor (2016-01-26),
7. 9099127 - Dual magnetic sensor for multi-input magnetic recording (2015-08-04),
8. 9099125 - Current-perpendicular-to-the-plane (CPP) magnetoresistive (MR) sensor structure with stacked sensors for minimization of the effect of head skew (2015-08-04),
9. 8902549 - Enhanced pinning property by inserted Si seed layer (2014-12-02),
10. 8760821 - Higher stability read head using a read sensor with a flat back edge (2014-06-24),
11. 8568602 - Method of manufacturing a magnetic read sensor having a low resistance cap structure (2013-10-29),
12. 7646569 - Pinned layer in magnetoresistive sensor (2010-01-12),
13. 7535683 - Magnetoresistive head with improved in-stack longitudinal biasing layers (2009-05-19),
14. 7474514 - Magnetoresistive head and manufacturing method thereof (2009-01-06),
15. 7370404 - Method for resetting pinned layer magnetization in a magnetoresistive sensor (2008-05-13),

Title: Kouichi Nishioka: A Pioneer in Magnetic Sensor Technology

Introduction

Kouichi Nishioka, based in Hiratsuka, Japan, has made significant contributions in the field of magnetic sensor technology. With a remarkable portfolio of 21 patents, Nishioka has been a driving force in innovations related to magnetoresistive read heads and sensors, impacting various industries.

Latest Patents

Among his latest patents, Nishioka developed a tunnel magnetoresistance magnetic sensor with a scissor sensor and multi-seed layer configuration. This innovative design includes a read head featuring a bottom magnetic shield, a sequence of non-magnetic and magnetic seed layers, as well as an antiferromagnetic layer and coupling layer, culminating in a robust structure aimed at enhancing performance and stability. Another notable patent is on a higher stability read head that employs a partial milling process. This method involves strategic formation and etching of magnetoresistive layers, improving the functionality and reliability of magnetic domain control films positioned around the free layer.

Career Highlights

Nishioka has carved out a distinguished career, having worked with leading technology companies such as HGST Netherlands B.V. and Hitachi, Ltd. His roles in these organizations have allowed him to leverage his expertise in magnetoresistive technologies, fostering advanced research and development initiatives.

Collaborations

Throughout his career, Nishioka has collaborated with notable colleagues, including Shinji Narishige and Takao Imagawa. These collaborations have not only propelled his research efforts but have also contributed to significant advancements in the field of magnetic sensors, blending their collective expertise to drive innovations.

Conclusion

Kouichi Nishioka's contributions to the domain of magnetic sensor technology are noteworthy. His impressive portfolio of patents and collaborations with prominent companies and colleagues highlight his pivotal role in shaping advancements in this field. As technology continues to evolve, Nishioka's work will likely continue to influence future innovations in magnetic sensing.

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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