Masakazu Sano

Title: Masakazu Sano: Innovator in Semiconductor Technology

Introduction

Masakazu Sano is a prominent inventor based in Saga, Japan. He has made significant contributions to the field of semiconductor technology, holding a total of 4 patents. His work focuses on improving the quality and fabrication methods of silicon wafers, which are essential components in electronic devices.

Latest Patents

Sano's latest patents include innovations in semiconductor silicon wafers and their fabrication processes. One of his notable inventions aims to provide a single-crystal silicon wafer that effectively eliminates octahedral voids of grown-in defects. These defects are known to generate crystal-originated particles (COP) on the surface and at various depths within the wafer. His fabrication method involves annealing in a hydrogen or inactive gas environment to out-diffuse oxygen near the surface. This process also removes oxide films from the inner walls of the octahedral voids, followed by oxidation annealing in an oxygen or mixed gas ambient. This innovative approach ensures the complete elimination of octahedral voids and the creation of an interstitial silicon layer within the wafer.

Another significant invention by Sano involves a method and equipment for annealing a vertical stack of two or more groups of unseparated wafers. This method allows for the annealing of approximately 10 wafers in each group in a single operation. It addresses various conditions, including oxygen outer diffusion annealing, control of bulk micro defects, and enhancement of gate oxide integrity.

Career Highlights

Throughout his career, Masakazu Sano has worked with notable companies such as Sumitomo Metal Industries, Inc. and Sumitomo Sitix Corporation. His experience in these organizations has contributed to his expertise in semiconductor technology and wafer fabrication.

Collaborations

Sano has collaborated with esteemed colleagues, including Naoshi Adachi and Takehiro Hisatomi. These partnerships have further enriched his work and innovations in the semiconductor field.

Conclusion

Masakazu Sano's contributions to semiconductor technology through his patents and collaborations highlight his role as an influential inventor. His innovative approaches to silicon wafer fabrication continue to impact the industry positively.