Yasuo Nagaoka

Title: Yasuo Nagaoka: Innovator in Wafer Manufacturing Technology

Introduction

Yasuo Nagaoka is a prominent inventor based in Annaka, Japan. He has made significant contributions to the field of wafer manufacturing, holding a total of 2 patents. His innovative methods have advanced the technology used in producing bonded wafers, which are essential in various electronic applications.

Latest Patents

Nagaoka's latest patents include a method for manufacturing bonded wafers through an ion implantation delamination method. This method involves bonding a bond wafer with a micro bubble layer to a base wafer, followed by delaminating the bond wafer to form a thin film. The process includes cleaning the bonded wafer with ozone water and performing rapid thermal annealing under a hydrogen-containing atmosphere. This innovative approach effectively removes damage caused by ion implantation and minimizes the occurrence of concave defects on the thin film's surface.

Another notable patent is a method for producing a direct bonded wafer. This method entails forming a thermal oxide film on the surface of either the bond wafer or the base wafer, bonding them via the oxide film, and subsequently thinning the bond wafer. The process includes annealing the bonded wafer in an atmosphere that helps remove the oxide film, resulting in a direct bonded wafer with a low void count.

Career Highlights

Yasuo Nagaoka is associated with Shin-Etsu Handotai Co., Ltd., a leading company in the semiconductor industry. His work has been instrumental in enhancing the efficiency and quality of wafer production processes.

Collaborations

Throughout his career, Nagaoka has collaborated with notable colleagues, including Norihiro Kobayashi and Hiroji Aga. These collaborations have contributed to the development of innovative technologies in wafer manufacturing.

Conclusion

Yasuo Nagaoka's contributions to wafer manufacturing technology have established him as a key figure in the industry. His innovative methods and patents continue to influence the production of high-quality bonded wafers, showcasing his expertise and commitment to advancing technology.