Amplifier circuits could collect data inside nuclear reactors

The silicon-carbide amplifiers have applications in aerospace and energy industries as they are claimed to be able to collect data inside nuclear reactors or rocket engines.

Dr Steven L Garverick, a professor of electrical engineering and computer science, described the team’s work in a paper he presented on 31 May at the 2012 IEEE EnergyTech conference, held at Case Western Reserve. The paper is co-authored by PhD candidate Chia-Wei Soong and Mehran Mehregany, director of the Case School of Engineering, San Diego programme.

These integrated circuits are constructed on a wide-band-gap semiconductor.

‘Most semiconductors are made out of silicon, but silicon will not function above 300°C, and there are some important applications above that range,’ said Garverick.

According to a statement, his team’s solution is to use silicon carbide because at high temperatures the material begins to act as a semiconductor.

Engineers at NASA Glenn Research Center pioneered techniques used to manufacture these circuits. Team members at Case Western Reserve have used them to fabricate complete circuits by depositing three distinct silicon-carbide layers on top of silicon-carbide wafers, which measure one-tenth of the thickness of a human hair.