Toshihiko Umezu

Title: Innovations of Toshihiko Umezu

Introduction

Toshihiko Umezu is a notable inventor based in Anan, Japan. He has made significant contributions to the field of optical semiconductors and light-emitting devices. With a total of 3 patents to his name, Umezu's work has had a considerable impact on modern technology.

Latest Patents

Umezu's latest patents include a light-emitting diode and an optical semiconductor device. One of his notable inventions is an epoxy resin composition suited for optical semiconductor devices, along with a method for manufacturing the same. This method involves producing a fluorescent material by firing a mixture of a stock material and a flux. The process may include a first firing in a weakly reducing atmosphere, followed by a second firing in a more reducing atmosphere. Additionally, his light-emitting diode features an LED chip with a light-emitting layer made of a nitride compound semiconductor. This device incorporates a light-transmitting resin that contains a fluorescent material, which absorbs part of the emitted light and re-emits it at a different wavelength.

Career Highlights

Umezu is currently associated with Nichia Corporation, a leading company in the field of LED technology. His work at Nichia has allowed him to explore innovative solutions in optical semiconductors and contribute to advancements in lighting technology.

Collaborations

Some of Umezu's coworkers include Kensho Sakano and Kazuhiko Sakai. Their collaborative efforts have further enhanced the research and development of optical devices within the company.

Conclusion

Toshihiko Umezu's contributions to the field of optical semiconductors and light-emitting devices demonstrate his innovative spirit and dedication to advancing technology. His patents reflect a commitment to improving the efficiency and functionality of modern lighting solutions.