Building radiation-resistant and repairable electronics

October 6, 2020, 9:38AMANS Nuclear Cafe

CMOS sensors such as this could be made more tolerant to ionizing radiation. Photo: NASA/Wikimedia Commons

High-energy radiation can be detrimental to electronic equipment, necessitating the use of radiation-hardened and -resistant electronics in nuclear energy, decommissioning, and space exploration. The online newsletter Tech Xplore reports on a radiation-hardened and repairable integrated circuit being fabricated by researchers at Peking University, Shanghai Tech University, and the Chinese Academy of Sciences.

The radiation-immune and repairable circuits developed by the researchers are based on field-effect transistors (FET) that use a semiconducting carbon nanotube transistor as a channel, an ion gel as its gate, and a substrate made of polyimide. According to the article, the FETs have a radiation tolerance of up to 15 Mrad, which is notably higher than the 1 Mrad tolerance of silicon-based transistors. The FETs are also capable of being recovered by annealing at moderate temperatures (100 °C for 10 minutes).

"Our work aimed to realize a kind of radiation-immune IC [integrated circuit]," said Zhiyong Zhang, one of the researchers who carried out the development work. Zhang added, "When designing our radiation-immune IC, we drew inspiration from the liquid metal robot T-1000 in the classic science fiction movie 'Terminator 2.'"

Research on the circuits was presented in the paper Radiation-hardened and repairable integrated circuits based on carbon nanotube transistors with ion gel gates, published in Nature Electronics.

Related Articles

ANS Task Force: Accelerating nuclear R&D investment is key to securing America’s clean energy future

Strategic federal investment in nuclear research and development is needed to rapidly deploy cost-­effective, flexible energy choices for a zero-­carbon future while strengthening national security and the economy.

February 17, 2021, 11:58AMNuclear News

The ANS Task Force on Public Investment in Nuclear Research and Development has just issued a report titled “The U.S. Nuclear R&D Imperative.” Visit to learn...