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Long-Term Storage
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Data Saved In Quartz Glass Might Last 300 Million Years

The electronics giant partnered with Kyoto University's Kiyotaka Miura to develop "semiperpetual" slivers of quartz glass that Hitachi says can preserve information for hundreds of millions of years with virtually no degradation.
The prototype is made of a square of quartz two centimetres wide and two millimetres thick. It houses four layers of dots that are created with a femtosecond laser, which produces extremely short pulses of light. The dots represent information in binary form, a standard that should be comprehensible even in the distant future and can be read with a basic optical microscope. Because the layers are embedded, surface erosion would not affect them.

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