Japanese researchers develop silicon carbide transistor capable of operating at 1,110°F, targeting Venus exploration and extreme-environment applications
A new junction field-effect transistor design solves long-standing problems with high-temperature reliability, opening possibilities for electronics on Venus and in jet engines.
What happened
Scientists at Kyoto University built a silicon carbide JFET that operates stably at temperatures exceeding 1,110°F (600°C), addressing two persistent engineering problems: low controllability and excessive leakage current at high temperatures. The researchers implemented a bottom-gate structure and used dopants to create semiconductor wells that limit voltage threshold errors to under 0.1V at 400°F and prevent current bypass when the transistor is off. The design was published August 17 in APL Electronic Devices and tested across temperatures from room temperature to 1,110°F, demonstrating stable switching performance throughout the range.
Context
Venus's surface reaches 860°F (460°C), but conventional silicon-based electronics have failed within hours—the Soviet lander Venera 13 survived only 2 hours 7 minutes. Silicon carbide JFETs have been considered promising for Venus missions since the early 2000s due to their inherent heat tolerance, but previous versions could only reliably operate long-term at 930°F (500°C) and suffered from design flaws that made them unreliable at higher temperatures. Beyond Venus probes, transistors that withstand extreme heat without thermal shielding or cooling systems could enable new designs in jet engines and other aerospace applications, currently constrained by the need for protective infrastructure. The researchers still must integrate, test, and scale the transistor to wafer-level production before practical deployment.