Location History:
- Yamato, JP (2000 - 2005)
- Miyagi, JP (2010 - 2013)
Company Filing History:
Years Active: 2000-2013
Title: Akira Ohtomo: Innovator in Semiconductor Technology
Introduction
Akira Ohtomo is a prominent inventor based in Miyagi, Japan. He has made significant contributions to the field of semiconductor technology, particularly in the development of p-type MgZnO-based thin films and devices. With a total of 5 patents to his name, Ohtomo's work has advanced the understanding and application of semiconductor materials.
Latest Patents
Ohtomo's latest patents include innovations such as a p-type MgZnO-based thin film and a semiconductor light-emitting device. This p-type MgZnO-based thin film is formed on a substrate made of a ZnO-based semiconductor. The composition allows for a ratio of magnesium to zinc (X) to be between 0 and 1, preferably between 0 and 0.5. The thin film contains nitrogen as p-type impurities at a concentration of approximately 5.0×10 cm or more, while n-type impurities made of group IV elements like silicon are limited to a concentration of approximately 1.0×10 cm or less. Additionally, the thin film is designed to include n-type impurities from group III elements such as boron and aluminum, also at a concentration of approximately 1.0×10 cm or less.
Another significant patent involves a ZnO-based thin film and semiconductor device that aims to reduce the burden on manufacturing apparatuses, improve controllability and reproducibility of doping, and achieve p-type conduction without altering the crystalline structure. This is accomplished through a superlattice structure of MgZnO/ZnO layers, which enhances the controllability and reproducibility of doping while preventing changes in the crystalline structure due to doping materials.
Career Highlights
Throughout his career, Akira Ohtomo has worked with notable companies such as Rohm Co., Ltd. and the Japan Science and Technology Corporation. His expertise in semiconductor technology has positioned him as a key figure in the industry.
Collaborations
Ohtomo has collaborated with esteemed colleagues, including Masashi Kawasaki and Ken Nakahara, who have contributed to his research and development efforts in semiconductor technology.
Conclusion
Akira Ohtomo's innovative work in semiconductor technology, particularly in p-type MgZnO-based thin films, has made a lasting impact on the field. His contributions continue to influence advancements