Tomoko Yasunaga

Title: Tomoko Yasunaga: Innovator in Semiconductor Technology

Introduction

Tomoko Yasunaga is a prominent inventor based in Tokyo, Japan. She has made significant contributions to the field of semiconductor technology, holding a total of 3 patents. Her innovative approaches have paved the way for advancements in semiconductor manufacturing processes.

Latest Patents

One of her latest patents is titled "Method of manufacturing semiconductor device having shallow junction." This patent discloses a method for manufacturing a semiconductor device with a silicon substrate that contains an impurity diffusion layer. The process involves doping impurities into the silicon substrate through a silicon oxide film that is 2.5 nm thick or less, using an accelerating voltage of 3 keV or less. The silicon oxide film is formed on the silicon substrate, and the substrate is then annealed with the oxide film remaining intact.

Another notable patent is the "Fabrication method of semiconductor device using selective epitaxial growth." This invention provides a method for fabricating a semiconductor device with an IGFET, which reduces current leakage caused by electrical short-circuits between the gate electrode and source/drain regions. The method includes forming first and second single-crystal silicon epitaxial layers on the source/drain regions through a selective epitaxial growth process, followed by oxidizing and etching the surface areas to prevent unwanted grain growth.

Career Highlights

Tomoko Yasunaga is currently employed at NEC Corporation, where she continues to innovate in semiconductor technology. Her work has been instrumental in enhancing the performance and reliability of semiconductor devices.

Collaborations

Throughout her career, Yasunaga has collaborated with notable colleagues, including Seiichi Shishiguchi and Akira Mineji. These collaborations have further enriched her research and development efforts in the semiconductor field.

Conclusion

Tomoko Yasunaga is a trailblazer in semiconductor technology, with her patents reflecting her commitment to innovation. Her contributions continue to influence the industry and inspire future advancements in semiconductor manufacturing.