Location History:
- Chiyoda-ku, JP (2013)
- Tokyo, JP (1993 - 2015)
- Okayama, JP (2019)
Company Filing History:
15 out of 315 
12 out of 3,091 
3 out of 217 
Years Active: 1993-2019
Title: **Shuji Yamashita: Innovator in Fine Particle Technology and Electroluminescence**
Introduction
Shuji Yamashita, based in Tokyo, Japan, is a noteworthy inventor with a significant portfolio comprising 22 patents. His innovative work, particularly in the fields of fine silver particle dispersions and phosphors for electron beam excitation, highlights his contribution to advanced materials technology.
Latest Patents
Yamashita's latest patents showcase innovative advancements in material science. One of his notable inventions is a **fine silver particle dispersing solution**, which contains 30 to 75% by weight of fine silver particles. These particles are coated with organic acids and dispersed in a water-based medium. The solution is enhanced with ammonia, nitric acid, and a surface regulating agent which incorporates a polyether-modified polydimethylsiloxane. Additionally, the solution can include an antifoaming agent, making it highly versatile for various applications.
Another significant patent is a **phosphor for electron beam excitation** that maintains high luminance even when subjected to increased electron beam densities. This phosphor is produced using raw materials such as CaN, AlN, SiN, and EuO, which are mixed and fired under an inert atmosphere. The resulting phosphor, designated as CaSiAlN:Eu, demonstrates valuable properties for color display devices.
Career Highlights
Throughout his career, Shuji Yamashita has been associated with prominent companies, including **Dowa Electronics Materials Co., Ltd.** and **Nichia Corporation**. His roles in these companies have allowed him to pioneer developments in the production and application of advanced materials, reinforcing his position as a leader in his field.
Collaborations
Yamashita's work has been enriched by collaborative efforts with esteemed colleagues such as Akira Nagatomi and Masahiro Gotoh. Their combined expertise has contributed significantly to the success of their ventures and innovations.
Conclusion
Shuji Yamashita’s contributions to the fields of fine particle technology and electroluminescence stand as a testament to his ingenuity and commitment to innovation. With a wealth of patents and collaborations under his belt, Yamashita remains a prominent figure in the advancement of new materials that are crucial for modern technological applications.