Dr. is a Japanese electrical engineer, active in the fields of nanotechnology

Nanotechnology

Nanotechnology is the study of manipulating matter on an atomic and molecular scale. Generally, nanotechnology deals with developing materials, devices, or other structures possessing at least one dimension sized from 1 to 100 nanometres...

 and electronic and photonic devices, best known for his success in fabricating hot-electron transistors and invention of resonant-tunneling transistors.

Yokoyama born in Osaka, Japan, received his bachelor's degree in Physics from Osaka City University

Osaka City University

, abbreviated to , is a public university in Japan. It is located in Sumiyoshi-ku, Osaka City.- History :OCU's predecessor was founded in 1880, as the Osaka Commercial Training Institute with donations by local merchants. It developed into Osaka Commercial School in 1885, then was municipalized in...

 (1971), and master's (1973) and PhD (1984) degrees in Engineering from the Graduate School of Engineering Science at Osaka University

Osaka University

, or , is a major national university located in Osaka, Japan. It is the sixth oldest university in Japan as the Osaka Prefectural Medical College, and formerly one of the Imperial Universities of Japan...

. He joined the Semiconductor Devices Laboratory of Fujitsu

Fujitsu

is a Japanese multinational information technology equipment and services company headquartered in Tokyo, Japan. It is the world's third-largest IT services provider measured by revenues....

 Laboratories Ltd. in 1973, where he was subsequently named a Fellow and General Manager of its Nanotechnology Research Center in 2000. He is also Visiting Professor of the University of Tokyo

University of Tokyo

, abbreviated as , is a major research university located in Tokyo, Japan. The University has 10 faculties with a total of around 30,000 students, 2,100 of whom are foreign. Its five campuses are in Hongō, Komaba, Kashiwa, Shirokane and Nakano. It is considered to be the most prestigious university...

.

Yokoyama received the 1987 GaAs Symposium Young Scientist Award, and 1998 IEEE Morris N. Liebmann Memorial Award

IEEE Morris N. Liebmann Memorial Award

The initially called Morris Liebmann Memorial Prize provided by the Institute of Radio Engineers , the IEEE Morris N. Liebmann Memorial Award was created in 1919 in honor of Colonel Morris N. Liebmann. It was initially given to awardees who had "made public during the recent past an important...

 "for contributions to and leadership in the development of self-aligned refractory-gate gallium arsenide MESFET

MESFET

MESFET stands for metal semiconductor field effect transistor. It is quite similar to a JFET in construction and terminology. The difference is that instead of using a p-n junction for a gate, a Schottky junction is used...

 integrated circuit

Integrated circuit

An integrated circuit or monolithic integrated circuit is an electronic circuit manufactured by the patterned diffusion of trace elements into the surface of a thin substrate of semiconductor material...

s." He was elected an IEEE Fellow

IEEE Fellow

An IEEE member is elevated to the grade of IEEE Fellow for "unusual distinction in the profession and shall be conferred by the Board of Directors upon a person with an extraordinary record of accomplishments in any of the IEEE fields of interest"...

 in 2000, Fellow of the Institute of Electronics, Information and Communication Engineers

Institute of Electronics, Information and Communication Engineers

The is a Japanese institute specializing in the areas of electronic, information and communication engineering and associated fields. It was established in May, 1917. Its headquarters are located in Tokyo, Japan....

 in 2003, and Fellow of the Applied Physics Society in 2007.

Selected works

• Masayuki Abe, Naoki Yokoyama, Semiconductor heterostructure devices, Volume 8 of Japanese technology reviews, Taylor & Francis US, 1989. ISBN 9782881243387.