TDK Corp showcased an optical disc with a capacity of 1 Tbyte (1,024 Gbytes) at Ceatec Japan 2010, a trade show that runs from Oct 5 to 9, 2010, in Japan.
The company realized the large capacity by forming 16 recording layers, each of which has a capacity of 32 Gbytes on each side of the disc. The number of layers of an existing Blu-ray disc is four at most.
TDK succeeded in forming 16 layers by developing a disc material with a high light transmittance. Specifically, the light transmittance of one layer is 95.1%, and that of 16 layers is 72.6%.