Blue-violet laser diodes cross licensed

Sony Corporation will become the second supplier of blue-violet laser diodes after signing a cross-licensing deal with Nichia Corporation.

Nichia and Sony began to collaborate on the development of Blue-Violet LD back in December 2002. The new agreement will enable both companies to use each other’s patented blue-violet LD technologies; collectively, there are approximately 800 patent applications in total filed by both companies.

Blue-Violet LD is a 405nm wavelength semiconductor laser which is vital for the development of the Blu-ray disc system that enables users to digitally record high-definition (HD) movies.

According to the Blu-ray Disc Founders (BDF), Blu-ray Disc will offer by far the highest capacity of any optical disc storage format ever developed for consumers, and yet the production costs of manufacturing Blu-ray Discs is expected to be comparable to current DVDs when manufactured at mass volumes.

A Blu-ray disc holds 25 GBytes of data or high definition video on a single-layer disc and 50 GBytes on a dual-layer disc. The current DVD disc, holds 4.7 GBytes on single-layer discs and 8.5 GBytes on dual-layer discs.

Sony plans to ship 50Gbyte units by year end.