Motoyuki Shigeiwa

Title: Motoyuki Shigeiwa: Innovator in Phosphor Technology

Introduction

Motoyuki Shigeiwa is a prominent inventor based in Yokohama, Japan. He has made significant contributions to the field of phosphor technology, holding a total of 5 patents. His work focuses on developing advanced materials that enhance the performance of light-emitting devices.

Latest Patents

One of his latest patents involves a europium- and strontium-based phosphor. This nitride phosphor contains europium as an activating element and strontium, or a combination of strontium and calcium, as divalent metal elements. The phosphor also includes aluminum and silicon, with at least 85% of the europium in the form of Eu. This phosphor exhibits a peak emission wavelength ranging from 590 nm to 650 nm, making it suitable for converting wavelengths of light emitted from excitation light sources in light-emitting devices. Another notable patent pertains to alloy powder for the raw material of inorganic functional materials and phosphors. This invention relates to a phosphor comprising a nitride or an oxynitride, characterized by an X-ray powder diffraction pattern with specific intensity ratios.

Career Highlights

Motoyuki Shigeiwa has worked with notable organizations, including Mitsubishi Chemical Corporation and the University of California. His experience in these institutions has allowed him to refine his expertise in phosphor technology and contribute to various innovative projects.

Collaborations

He has collaborated with esteemed colleagues such as Naoto Kijima and Hiromu Watanabe, further enhancing the impact of his work in the field.

Conclusion

Motoyuki Shigeiwa's contributions to phosphor technology demonstrate his innovative spirit and commitment to advancing materials science. His patents reflect a deep understanding of the complexities involved in developing efficient light-emitting devices.