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For the Inventor, By the Inventor

Ibaraki, Japan

Tadamichi Asai

This inventor holds 7 USPTO granted patents. Top assignees: Hitachi, Ltd., Hitachi Chemical Company, Ltd.. Active years: 1982-1993.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Tadamichi Asai. Retrieved from https://idiyas.com/inventor/tadamichi-asai

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

USPTO Granted Patents = 7

% Patents Active = 100.0

Average Co-Inventor Count = 5.5

ph-index = 5

Forward Citations = 87(Granted Patents)


Location History:

  • Hitachi, JP (1982)
  • Ibaraki, JP (1985 - 1993)

Company Filing History:

goldMedal7 out of 42,726 
 
Hitachi, Ltd.
 patents
silverMedal2 out of 1,641 
 
Hitachi Chemical Company, Ltd.
 patents
where one patent can have more than one assignee

Years Active: 1982-1993

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7 patents (USPTO):Explore Patents
1. 5204166 - Thick film resistor composition, hybrid IC using the composition, and (1993-04-20),
2. 5196915 - Semiconductor device (1993-03-23),
3. 5016089 - Substrate for hybrid IC, hybrid IC using the substrate and its (1991-05-14),
4. 4873022 - Electrically conductive paste, electronic circuit component and method (1989-10-10),
5. 4585706 - Sintered aluminum nitride semi-conductor device (1986-04-29),
6. 4540673 - Sintered aluminum nitride and semi-conductor device using the same (1985-09-10),
7. 4345179 - Resistor glass seal spark plug (1982-08-17),

Title: Tadamichi Asai: Innovator in Thick Film Resistor Technology

Introduction

Tadamichi Asai is a notable inventor based in Ibaraki, Japan. He has made significant contributions to the field of semiconductor devices, particularly in thick film resistor technology. With a total of 7 patents to his name, Asai's work has had a lasting impact on the industry.

Latest Patents

Asai's latest patents include a thick film resistor composition and a hybrid integrated circuit (IC) utilizing this composition. His inventions focus on a thick film resistor material that is particularly suitable for hybrid ICs, which incorporate conductors, resistors, and semiconductor elements. One of the key features of his thick film resistor composition is its ability to be fired in a reducing atmosphere, enhancing its performance. Additionally, he has developed a semiconductor device that contains a boride particle of a metal dispersed in a glass matrix, which helps suppress thermal stress and improves electroconductivity.

Career Highlights

Throughout his career, Tadamichi Asai has worked with prominent companies such as Hitachi, Ltd. and Hitachi Chemical Company, Ltd. His experience in these organizations has allowed him to refine his expertise in semiconductor technology and contribute to various innovative projects.

Collaborations

Asai has collaborated with notable coworkers, including Toshio Ogawa and Kousuke Nakamura. Their joint efforts have further advanced the development of thick film resistor technology and semiconductor devices.

Conclusion

Tadamichi Asai's contributions to thick film resistor technology and semiconductor devices have established him as a key figure in the field. His innovative patents and collaborations reflect his dedication to advancing technology in this area.

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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