High Density

HD DVD stands for 'High-Density Digital Versatile Disc'. It is being promoted by Toshiba, NEC and Sanyo as well as being backed by four major film studios. Our parent company, Mitsubishi Kaguku Media, is a member of the HD DVD technology development group meaning that Verbatim has access to the latest in HD DVD technology.

The HD DVD disc, like the Blu-ray disc has a higher storage capacity and also uses a blue laser with a shorter wavelength than the standard red laser used in CD and DVD technology. CD has a wavelength of 780nm and DVD has a wavelength of 650nm, they both use an infrared laser. The HD DVD disc utilises a blue laser with a wavelength of only 405nm and by having a shorter wavelength it is possible to write smaller data pits and therefore vastly increases the amount of data on the disc.

 

 

How a DVD disc works

HD DVD has the same basic structure as a DVD and has many of the same production technologies. It measures 120mm in diameter, uses back-to-back bonding of two 0.6mm thick substrates.