Toshiaki Shigeoka

Title: Toshiaki Shigeoka: Innovator in Semiconductor and Phosphor Technologies

Introduction

Toshiaki Shigeoka is a notable inventor based in Kirishima, Japan. He has made significant contributions to the fields of semiconductor devices and phosphor materials. With a total of 2 patents, his work has advanced the technology used in various electronic applications.

Latest Patents

Shigeoka's latest patents include a cordierite sintered body and a member for semiconductor devices composed of a cordierite sintered body. This invention discloses a cordierite sintered body that includes both a crystal phase and an amorphous phase. The crystal phase consists of a main crystal phase primarily made up of cordierite crystal grains, along with a sub crystal phase containing alumina, mullite, or sapphirine. The amorphous phase, which contains calcium, is located at the grain boundaries of the cordierite crystal grains and the sub crystal grains. The proportions of the crystal phases are carefully defined, ensuring optimal performance in semiconductor manufacturing.

Another significant patent involves a phosphor that absorbs ultraviolet or visible light and emits visible light at a longer wavelength. This invention details a wavelength converter phosphor material that includes essential components such as Europium, Magnesium, Manganese, and Silicon. This phosphor is designed to convert the wavelength of light emitted from light-emitting elements, such as LEDs, into a different wavelength suitable for illumination devices.

Career Highlights

Throughout his career, Toshiaki Shigeoka has worked with prominent companies, including Kyocera Corporation and Honda Motor Co., Ltd. His experience in these organizations has allowed him to develop innovative technologies that have practical applications in the electronics and automotive industries.

Collaborations

Shigeoka has collaborated with notable colleagues, including Tatsuji Furuse and Hiroaki Seno. These partnerships have contributed to the advancement of his research and the successful development of his patents.

Conclusion

Toshiaki Shigeoka's contributions to semiconductor and phosphor technologies highlight his innovative spirit and dedication to advancing electronic applications. His patents reflect a deep understanding of material science and engineering, making him a significant figure in his field.