Tokyo, Japan

Mitsunori Yokoyama

This inventor holds 5 USPTO granted patents and 1 published patent application. Top assignee: Sumitomo Electric Industries, Limited. Active years: 2014-2015.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Mitsunori Yokoyama. Retrieved from https://idiyas.com/inventor/mitsunori-yokoyama

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

Calculating rank
USPTO Granted Patents = 5 

% Patents Active = 40.0

Average Co-Inventor Count = 6.2

ph-index = 3

Forward Citations = 16(Granted Patents)


Location History:

  • Tokyo, JP (2014 - 2015)
  • Yokohama, JP (2014 - 2015)

Company Filing History:


Years Active: 2014-2015

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5 patents (USPTO):Explore Patents

Title: Innovations of Mitsunori Yokoyama

Introduction

Mitsunori Yokoyama is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of five patents. His work focuses on improving the performance and reliability of semiconductor devices.

Latest Patents

Yokoyama's latest patents include a vertical GaN-based semiconductor device. This device features improved pinch-off characteristics and breakdown voltage characteristics by stabilizing the electric potential of a p-type GaN barrier layer. The design incorporates a GaN-based stacked layer with an opening, a regrown layer that includes a channel, and a p-type GaN-based supplementary layer that forms a tunnel junction with the n-type source layer. Another notable patent is for a semiconductor device and method for producing the same, which aims to enhance the breakdown voltage characteristics of a vertical semiconductor device. This device includes a channel formed of two-dimensional electron gas and a GaN-based stacked layer that consists of various layers, including n-type GaN drift and contact layers.

Career Highlights

Mitsunori Yokoyama is currently employed at Sumitomo Electric Industries, Limited, where he continues to innovate in semiconductor technology. His work has been instrumental in advancing the capabilities of GaN-based devices, which are crucial for various applications in electronics.

Collaborations

Yokoyama has collaborated with notable coworkers such as Seiji Yaegashi and Makoto Kiyama. Their combined expertise has contributed to the successful development of advanced semiconductor technologies.

Conclusion

Mitsunori Yokoyama's contributions to semiconductor technology through his innovative patents highlight his role as a leading inventor in the field. His work continues to influence the development of more efficient and reliable electronic devices.

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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