Hitachi has showcased their experimental 4 layered Blu-Ray discs at the Ceatec 2007 in Tokyo. It can hold up to 100GB. The company is currently working on the signal quality stabilization in addition to changing the lens focus so it can read and write on 4 layers. They are also do research on the 8 layer Blu-Ray media which can hold up 200GB of data but with layers the reflected laser from the disc decreases which weakens the signal. Wow I just can’t imagine a 100GB disc.

[via New Launches]