From left to right: the QR codes after fabrication, after two hours at 613 K, and after two hours at 763 K (Image: de Vries/University of Twente)
The data is etched in tungsten, which vastly improves resistance to extreme levels of heat (Image: de Vries/University of Twente)
A new optical disc uses QR codes etched in tungsten to achieve extreme levels of heat resistance (Image: de Vries/University of Twente)
A researcher at the University of Twente in the Netherlands has developed a new optical memory disc out of tungsten and silicon nitride that he says could store data safely for extremely long periods of time – up to a billion years.
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