Kazuhito Yamasawa

This inventor holds 17 USPTO granted patents and 2 published patent applications, primarily in Magnetic Garnet Materials. Top assignees: Tdk Corporation, Tkd Corporation. Active years: 1995-2023.

IDiyas Innovation Intelligence. (2026). Inventor Profile: Kazuhito Yamasawa. Retrieved from https://idiyas.com/inventor/kazuhito-yamasawa

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

Calculating rank

USPTO Granted Patents = 17 (Patent Applications = 2)

% Patents Active = 94.1

Average Co-Inventor Count = 3.2

ph-index = 5

Forward Citations = 70(Granted Patents)

Location History:

Nihonbashi, JP (2003)
Chuo-ku, JP (2005)
Tokyo, JP (1995 - 2023)

Company Filing History:

Years Active: 1995-2023

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Areas of Expertise:

Magnetic Garnet

Faraday Rotator

Optical Device

Bismuth-Substituted

Single-Crystal Film

Alumina Substrate

Epitaxial Growth

Optical Communication

Thin Film Production

Hard Magnetic Material

Optical Device Manufacturing

17 patents (USPTO):Sort by Forward CitationsExplore Patents

1. 11773508 - Substrate and light-emitting element (2023-10-03),

2. 10458041 - Alumina substrate (2019-10-29),

3. 10337120 - Alumina substrate (2019-07-02),

4. 10294585 - Alumina substrate (2019-05-21),

5. 7517406 - Magnetic garnet material, faraday rotator, optical device, bismuth-substituted rare earth-iron-garnet single-crystal film and method for producing the same and crucible for producing the same (2009-04-14),

6. 7333261 - Magnetic garnet material, faraday rotator, optical device, bismuth-substituted rare earth-iron-garnet single-crystal film and method for producing the same crucible for producing the same (2008-02-19),

7. 7242516 - Hard magnetic garnet material, faraday rotator, optical device, optical communication system, method of manufacturing faraday rotator and method of manufacturing bismuth-substituted rare earth iron garnet single crystal (2007-07-10),

8. 7133189 - Magnetic garnet material, faraday rotator, optical device, bismuth-substituted rare earth-iron-garnet single-crystal film and method for producing the same and crucible for producing the same (2006-11-07),

9. 6875270 - Magnetic garnet single-crystal film and method of producing the same, and Faraday rotator comprising the same (2005-04-05),

10. 6853473 - Faraday rotator and optical device comprising the same, and antireflection film and optical device comprising the same (2005-02-08),

11. 6775052 - HARD MAGNETIC GARNET MATERIAL, FARADAY ROTATOR, OPTICAL DEVICE, OPTICAL COMMUNICATION SYSTEM, METHOD OF MANUFACTURING FARADAY ROTATOR AND METHOD OF MANUFACTURING BISMUTH-SUBSTITUTED RARE EARTH IRON GARNET SINGLE CRYSTAL (2004-08-10),

12. 6641751 - Magnetic garnet single crystal and faraday rotator using the same (2003-11-04),

13. 6527973 - Magnetic garnet material and magnetooptical device using the same (2003-03-04),

14. 6309557 - Magnetic garnet material and faraday rotator using the same (2001-10-30),

15. 5662740 - Process for producing thin film by epitaxial growth (1997-09-02),

Title: Kazuhito Yamasawa: Innovator in Substrate Technology

Introduction

Kazuhito Yamasawa is a prominent inventor based in Tokyo, Japan. He has made significant contributions to the field of substrate technology, holding a total of 17 patents. His work focuses on enhancing the performance and reliability of light-emitting elements and substrates.

Latest Patents

Yamasawa's latest patents include innovative designs for substrates and light-emitting elements. One notable patent describes a substrate that comprises a first layer containing crystalline aluminum nitride, a second layer containing crystalline α-alumina, and an intermediate layer sandwiched between them. This intermediate layer contains aluminum, nitrogen, and oxygen, with the nitrogen content decreasing and the oxygen content increasing in a specific direction. Another patent details an alumina substrate designed to minimize warping while supporting the growth of AlN crystals. This substrate features a gap and a rare earth element-containing region that helps prevent cracking and fracturing during the growth process.

Career Highlights

Throughout his career, Yamasawa has worked with notable companies, including TDK Corporation and TKD Corporation. His expertise in substrate technology has positioned him as a key figure in the development of advanced materials for electronic applications.

Collaborations

Yamasawa has collaborated with esteemed colleagues such as Atsushi Ohido and Tamotsu Sugawara. Their combined efforts have contributed to the advancement of substrate technology and its applications in various industries.

Conclusion

Kazuhito Yamasawa's innovative work in substrate technology has led to significant advancements in the field. His patents reflect a deep understanding of material science and its practical applications. His contributions continue to influence the development of reliable and efficient electronic components.

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]

2 patents pending: