Location History:
- Chiba-ken, JP (2006)
- Chiba, JP (2007 - 2015)
- Ichikawa, JP (2009 - 2017)
- Tokyo, JP (2016 - 2017)
- Ome, JP (2017 - 2018)
Company Filing History:
38 out of 898 
1 out of 987 
1 out of 395 
Years Active: 2006-2018
Title: Innovations of Tokuyuki Nakayama
Introduction
Tokuyuki Nakayama is a prominent inventor based in Ichikawa, Japan, known for his significant contributions to the field of semiconductor technology. With a remarkable tally of 39 patents, his work primarily focuses on the development of oxide sintered bodies, sputtering targets, and oxide semiconductor thin films.
Latest Patents
Among his latest innovations are the oxide sintered body, sputtering target, and oxide semiconductor thin film obtained using sputtering target. He provided an oxide sintered compact that enables low carrier density and high carrier mobility when used to obtain an oxide semiconductor thin film through sputtering. This oxide sintered compact comprises oxides of indium, gallium, and aluminum, featuring a gallium content ranging from 0.15 to 0.49 by Ga/(In+Ga) atomic ratio, as well as an aluminum content from 0.0001 to less than 0.25 by Al/(In+Ga+Al) atomic ratio. The crystalline oxide semiconductor thin film formed using this oxide sintered compact exhibits a carrier density of 4.0×10^cm or less and a carrier mobility of 10 cm/Vsec or greater. Additionally, Nakayama has developed another oxide sintered body that facilitates a low carrier concentration and high carrier mobility when utilized in a sputtering method, which also involves a sputtering target using this oxide sintered body.
Career Highlights
Throughout his career, Tokuyuki Nakayama has made valuable contributions while working with notable organizations such as Sumitomo Metal Mining Company, Ltd. and Tohoku University. His expertise in the semiconductor field has led to significant advancements in oxide materials, which are pivotal for various applications in electronics.
Collaborations
Nakayama has collaborated with esteemed colleagues including Yoshiyuki Abe and Eiichiro Nishimura. This collaborative effort has resulted in innovative outcomes and has bolstered advancements in semiconductor technologies.
Conclusion
Tokuyuki Nakayama continues to push the boundaries of semiconductor innovation with his patents and contributions. His work not only enhances the field of semiconductor technology but also paves the way for future developments in electronic devices, making him a notable figure among contemporary inventors.