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For the Inventor, By the Inventor

Kobe, Japan

Kazuo Kumagai

This inventor holds 9 USPTO granted patents. Top assignee: Kabushiki Kaisha Kobe Seiko Sho. Active years: 1990-1994.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuo Kumagai. Retrieved from https://idiyas.com/inventor/kazuo-kumagai

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

USPTO Granted Patents = 9

% Patents Active = 100.0

Average Co-Inventor Count = 5.3

ph-index = 6

Forward Citations = 199(Granted Patents)


Company Filing History:

goldMedal9 out of 1,101 
 
Kabushiki Kaisha Kobe Seiko Sho
 patents

Years Active: 1990-1994

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9 patents (USPTO):Explore Patents
1. 5373172 - Semiconducting diamond light-emitting element (1994-12-13),
2. 5358754 - Method for forming diamond films by vapor phase synthesis (1994-10-25),
3. 5304461 - Process for the selective deposition of thin diamond film by gas phase (1994-04-19),
4. 5298766 - Diamond heterojunction diode (1994-03-29),
5. 5160405 - Method of etching diamond thin films (1992-11-03),
6. 5107315 - MIS type diamond field-effect transistor with a diamond insulator (1992-04-21),
7. 5086014 - Schottky diode manufacturing process employing the synthesis of a (1992-02-04),
8. 5066938 - Diamond film thermistor (1991-11-19),
9. 4940015 - Plasma reactor for diamond synthesis (1990-07-10),

Title: The Innovative Journey of Kazuo Kumagai

Introduction

Kazuo Kumagai, a distinguished inventor hailing from Kobe, Japan, has made significant contributions to the field of semiconducting materials. With a total of 9 patents to his name, Kumagai's work revolutionizes the way we understand and utilize diamond in electronics and optoelectronics.

Latest Patents

Among his noteworthy inventions is the "Semiconducting Diamond Light-Emitting Element," which features an innovative structure comprising an electrically conductive substrate, a semiconducting diamond layer, an insulating diamond layer, and electrodes for both front and back. This design allows for customizable light emission colors by adjusting the impurity content within the semiconducting diamond layer. Additionally, the luminescence intensity can be modified by varying the applied voltage, all while avoiding dielectric breakdown.

Another key patent is a "Method for Forming Diamond Films by Vapor Phase Synthesis." This method details a unique process involving direct current discharge plasma to create diamond films on substrates. The reaction occurs in an atmosphere containing carbon and hydrogen gases at specified temperatures and pressures, broadening the scope of diamond fabrication techniques.

Career Highlights

Kazuo Kumagai is currently affiliated with Kabushiki Kaisha Kobe Seiko Sho, where he continues to push the boundaries of technological innovation. His work at the company showcases a strong commitment to advancing the field of diamond semiconductors, which has a vast range of applications in modern technology.

Collaborations

In his journey, Kumagai has collaborated with notable colleagues such as Koji Kobashi and Koichi Miyata. Together, they form a team that fosters creativity and innovation, driving forward research and development within their fields of expertise.

Conclusion

Kazuo Kumagai's contributions to the field of semiconducting materials through his patents underline the importance of innovation in technology. His groundbreaking work continues to influence future advancements in electronics, underlining the perpetual evolution of materials science and engineering.

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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