Russian Scientists Develop Flash Memory Capable of Storing Data for Hundreds of Years

Image: iXBT · Source

Researchers at the Rzhanov Institute of Semiconductor Physics in Russia have developed a radiation-resistant, non-volatile flash memory technology with data retention lasting potentially centuries, aimed at space applications like satellites and orbital data centers.

Scientists from the A. V. Rzhanov Institute of Semiconductor Physics, part of the Siberian Branch of the Russian Academy of Sciences, have proposed a new technology for non-volatile flash memory notable for its enhanced resistance to radiation and an exceptionally long data retention period. This innovation holds promise for use in space technology, including satellites, spacecraft equipped with nuclear power units, and orbital data centers.

The core of the technology is based on dielectric films with structural defects known as electron traps. These traps can capture and hold electrical charge over extended durations, with the presence or absence of charge representing digital information. Initially, the researchers experimented with silicon nitride films, later shifting to materials featuring high dielectric permittivity such as aluminum oxide and zirconium oxide. According to the developers, this approach increases data retention life, reduces power consumption during rewriting, and improves memory resilience to ionizing radiation; patents have been filed covering these solutions.

Vladimir Gritsenko, the institute’s lead scientific collaborator, stated that at room temperature, the theoretical electron retention time in these traps could reach hundreds of years. Unlike traditional flash memory that relies on floating gates, this design localizes charge directly within the dielectric layer.

Radiation resistance is critical for space-based electronics, as exposure to high-energy particles can cause data errors or corruption. Therefore, memories with augmented radiation hardness are especially valuable for prolonged space missions.

One potential application the scientists highlight is orbital data centers. Satellites conducting remote sensing and scientific missions generate large volumes of data, and processing this data onboard could reduce bandwidth demands on communication channels to Earth.

Beyond satellites, the technology may be utilized in more complex systems such as spacecraft powered by nuclear sources and autonomous research stations. However, the researchers emphasize that radiation-resistant memory alone is insufficient; radiation-hardened processors remain a separate technological challenge.

Concurrently, the team is investigating alternative data storage mechanisms that rely on altering the material state rather than charge storage. These experimental methods could offer significantly higher operating speeds and endurance reaching trillions of rewrite cycles, though they remain in early development stages.

This milestone development represents a meaningful advance in creating durable memory technologies tailored for the demanding conditions of space exploration and long-term data storage.