Yokohama, Japan

Seiji Hayashi

This inventor holds 15 USPTO granted patents and 2 EPO patents, primarily in Printed Circuit Boards. Top assignees: Canon Kabushiki Kaisha, Sega Enterprises, Ltd.. Active years: 2002-2020.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Seiji Hayashi. Retrieved from https://idiyas.com/inventor/seiji-hayashi-aat7v7zb

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

Calculating rank

% Patents Active = 40.0

 

Average Co-Inventor Count = 1.8

ph-index = 4

Forward Citations = 69(Granted Patents)


Location History:

  • Kanagawa, JP (2003 - 2006)
  • Tokyo, JP (2002 - 2007)
  • Yokohama, JP (2008 - 2020)

Company Filing History:


Years Active: 2002-2020

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Areas of Expertise:
Printed Circuit Board
Uniform Impedance
Noise Filter
Transmission Apparatus
Multilayered
Printed Wiring Board
Semiconductor Package
Cable Arranging Structure
Electronic Apparatus
Race Game Device
15 patents (USPTO):Explore Patents

Title: Seiji Hayashi: Innovator in Printed Circuit Board Technology

Introduction

Seiji Hayashi is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of printed circuit board technology, holding a total of 15 patents. His innovative designs have helped advance the efficiency and functionality of electronic devices.

Latest Patents

One of Hayashi's latest patents involves a printed circuit board that features a printed wiring board and a semiconductor package mounted on it. The connection between the printed wiring board and the semiconductor package is established using a plurality of solder balls. An underfill material, which covers these solder balls, is filled between the printed wiring board and the semiconductor package. This underfill material has a relative dielectric constant ranging from 8.6 to 54.4. This design effectively reduces crosstalk noise generated in wiring in the out-of-plane direction without increasing the mounting area.

Career Highlights

Throughout his career, Seiji Hayashi has worked with notable companies such as Canon and Sega Enterprises, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to various innovative projects.

Collaborations

Hayashi has collaborated with talented individuals in the industry, including Hideho Inagawa and Takuya Kondo. These partnerships have fostered a creative environment that has led to the development of groundbreaking technologies.

Conclusion

Seiji Hayashi's work in printed circuit board technology exemplifies his commitment to innovation and excellence. His patents and collaborations continue to influence the electronics industry, showcasing the importance of creativity in technological advancement.

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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