This pocket-sized diamond wafer might last up to 25exabytes

This pocket-sized diamond wafer might last up to 25exabytes ...

Two Japanese researchers have developed a new method of mass-producing 2-inch diamond wafers, also known as Kenzan Diamonds, that could be used to store up to 25 exabytes of data, which is 25 million terabytes or the equivalent of 1 billion Blu-ray discs.

Unfortunately, these diamond wafers will not replace SSDs in our computers anytime soon as they act as quantum memory. It uses a diamond defect, called the nitrogen-vacancy center, to store a quantum bit.

This error permits researchers to see out the specific spin of an electron. It''s notable that these diamond qubits may be used even at room temperature, not just under the usual cryogenic circumstances.

A diamond wafer with the required clarity for quantum computing applications was previously limited to a 4mm square. Attempting to make larger wafers would result in higher levels of nitrogen impurities, rendering them useless.

Researchers at Saga University and Adamant Namiki Precision Jewel Co. have collaborated to solve this problem. Using a step flow growth, they grow the diamonds on a sapphire substrate coated with an iridium film. This new technique, they claim, allows them to be cheaper, while decreasing nitrogen absorption, keeping it below three parts per billion.

The company intends to make Kenzan Diamond wafers available for purchase next year, and it is already working on producing 4-inch wafers.

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