Scientists Create Memory Chip Resistant to Extreme Heat

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Researchers at the University of Southern California have created a memory chip that can function at temperatures up to 700°C, more than triple the temperature limit of conventional electronics. This breakthrough, which came about accidentally during graphene experiments, unlocks the possibility of computing in extreme environments like Venus and geothermal plants. The device uses a sandwich of tungsten, hafnium oxide, and graphene to prevent short-circuiting, allowing it to retain data for over 50 hours without refresh.

Why it matters

This new memory chip technology could enable computing in environments previously considered too extreme, such as the surface of Venus or inside geothermal power plants. It also has potential applications in the automotive industry and for AI acceleration, as the memristor-based design excels at matrix multiplication.

The details

The key innovation was the use of a graphene layer to prevent the tungsten atoms from migrating and short-circuiting the device, a problem that had plagued previous high-temperature chip designs. The researchers say this is 'the best high-temperature memory ever demonstrated,' far exceeding the capabilities of earlier attempts that could only operate up to around 300°C.

• The breakthrough came from accidental discoveries during graphene experiments.
• The USC team's device operates continuously at 700°C with data retention intact.

What they’re saying

What’s next

The researchers say they had to stop testing the device due to equipment limitations, not because of device failure, suggesting there may be even higher temperature capabilities to explore.