Ten layers, plenty of space
TDK Corp seems to be keen on sending the Blu-ray packing, as the company developed a 10-layer optical disc with capacity of 320GB, where each layer is capable of storing up to 32GB of data. Just for comparison, Blu-ray discs can store up to 25GB per layer.
Apparently, the more layers the medium has, the weaker the signal gets, so expanding optical drives by introducing more layers requires improved transmittance, something that TDK effectively tackled by enhancing the composition of used materials.
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