Company Filing History:
3 out of 1,100 
2 out of 7 Years Active: 1994-1998
Title: Innovations of Yuuki Tamura
Introduction
Yuuki Tamura is a notable inventor based in Annaka, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the development of GaP (Gallium Phosphide) light-emitting devices. With a total of five patents to his name, Tamura's work has advanced the capabilities of semiconductor substrates.
Latest Patents
One of his latest patents is a method for fabricating a gap type semiconductor substrate of red light. This invention involves a semiconductor substrate for GaP type light-emitting devices, which includes an n-type single crystal substrate, an n-type GaP layer, and a p-type GaP layer formed on the n-type GaP single crystal substrate. The carbon concentration in the n-type GaP single crystal substrate is maintained between 1.0 x 10^16 atoms/cc and 1.0 x 10^17 atoms/cc. The substrate is produced using the Liquid Encapsulation Czochralski method with B2O3 containing water as an encapsulation liquid.
Another significant patent is for a GaP light-emitting substrate and a method of manufacturing it. This invention comprises an n-type GaP layer, a nitrogen-doped n-type GaP layer, and a p-type GaP layer layered on a multi-layer GaP substrate. The sulfur concentration in the n-type GaP buffer layer is kept at 5 x 10^16 atoms/cc or less. The manufacturing method involves forming an n-type GaP buffer layer on an n-type GaP single crystal substrate to prepare a multi-layer GaP substrate.
Career Highlights
Yuuki Tamura has worked with prominent companies in the semiconductor industry, including Shin-Etsu Handotai Co., Ltd. and Shin-Etsu Handotai Kabushiki Kaisha. His experience in these organizations has contributed to his expertise in semiconductor technology and innovation.
Collaborations
Tamura has collaborated with notable colleagues such as Munehisa Yanagisawa and Susumu Higuchi. Their joint efforts have furthered advancements in the field of semiconductor devices.
Conclusion
Yuuki Tamura's contributions to semiconductor technology, particularly in GaP light-emitting devices, have established him as a significant figure in the field. His innovative patents and collaborations reflect his commitment to advancing technology