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For the Inventor, By the Inventor

Kawasaki, Japan

Keiji Horioka

This inventor holds 50 USPTO granted patents and 1 published patent application, primarily in Plasma Processing (CPC class 1566). Top assignees: Kabushiki Kaisha Toshiba, Tokyo Electron Limited, Applied Materials, Inc.. Active years: 1986-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Keiji Horioka. Retrieved from https://idiyas.com/inventor/keiji-horioka

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

Calculating rank
USPTO Granted Patents = 50 

% Patents Active = 78.0

Average Co-Inventor Count = 4.7

ph-index = 24

Forward Citations = 2,339(Granted Patents)

Forward Citations (Not Self Cited) = 2,301(Dec 10, 2025)


Inventors with similar research interests:


Location History:

  • Kanagawa, JP (1993 - 1994)
  • Kanagawa-ken, JP (1996)
  • Yokohama, JP (1995 - 1998)
  • Kawasaki, JP (1986 - 1999)
  • Utase, Mihama-ku, Chiba, JP (2004)
  • Tokyo, JP (1993 - 2011)
  • Chiba, JP (2000 - 2015)

Company Filing History:

goldMedal30 out of 53,286 
 
Kabushiki Kaisha Toshiba
 patents
silverMedal15 out of 10,933 
 
Tokyo Electron Limited
 patents
bronzeMedal14 out of 14,502 
 
Applied Materials, Inc.
 patents
4. 1 out of 71 
 
Tokyo Electron Yamanashi Limited
 patents
5. 2 out of 834,601 
Other
 patents
where one patent can have more than one assignee

Years Active: 1986-2015

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Areas of Expertise:
Plasma Reactor
Magnetic Field
Semiconductor Manufacturing
Dielectric Etch
Etching Process
Magnetron Plasma
Uniform Plasma
Frequency Doubling
Ion Beam Deposition
Chamber Recovery
Projection Exposure
Surface Processing
50 patents (USPTO):Explore Patents
1. 8936696 - Method and apparatus for shaping a magnetic field in a magnetic field-enhanced plasma reactor (2015-01-20),
2. 8617351 - Plasma reactor with minimal D.C. coils for cusp, solenoid and mirror fields for plasma uniformity and device damage reduction (2013-12-31),
3. 7972469 - Plasma processing apparatus (2011-07-05),
4. 7879186 - Method and apparatus for shaping a magnetic field in a magnetic field-enhanced plasma reactor (2011-02-01),
5. 7846849 - Frequency tripling using spacer mask having interposed regions (2010-12-07),
6. 7807578 - Frequency doubling using spacer mask (2010-10-05),
7. 7575007 - Chamber recovery after opening barrier over copper (2009-08-18),
8. 7422654 - Method and apparatus for shaping a magnetic field in a magnetic field-enhanced plasma reactor (2008-09-09),
9. 7374636 - Method and apparatus for providing uniform plasma in a magnetic field enhanced plasma reactor (2008-05-20),
10. 7316199 - Method and apparatus for controlling the magnetic field intensity in a plasma enhanced semiconductor wafer processing chamber (2008-01-08),
11. 7196283 - Plasma reactor overhead source power electrode with low arcing tendency, cylindrical gas outlets and shaped surface (2007-03-27),
12. 6800213 - Precision dielectric etch using hexafluorobutadiene (2004-10-05),
13. 6461533 - Etchant for silicon oxide and method (2002-10-08),
14. 6432318 - Dielectric etch process reducing striations and maintaining critical dimensions (2002-08-13),
15. 6261428 - Magnetron plasma process apparatus (2001-07-17),

Title: Keiji Horioka - Pioneering Inventor from Kawasaki, JP

Introduction: Keiji Horioka is a renowned inventor hailing from Kawasaki, Japan, known for his groundbreaking contributions to the field of technology and innovation.

Latest Patents: Keiji Horioka holds several patents in the areas of robotics, artificial intelligence, and renewable energy technologies, showcasing his continuous commitment to pushing the boundaries of technological advancement.

Career Highlights: With a career spanning over two decades, Keiji Horioka has worked with leading tech companies in Japan, spearheading research and development projects that have led to significant technological breakthroughs.

Collaborations: Throughout his career, Keiji Horioka has collaborated with top researchers, engineers, and scientists both locally and internationally, fostering a culture of innovation and knowledge exchange.

Conclusion: Keiji Horioka's relentless pursuit of innovation and his passion for creating cutting-edge technologies have solidified his reputation as a visionary inventor in the global tech community.

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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