A BD-R based on organic dye recording materials has been successfully developed,
so the existing low-cost spin-coating technologies can still be applied [7, 8].
A BD-R disk with a Cu/Si double layer recording material is the most popular [9],
but other inorganic materials such as Bi-Ge nitride and Te-Pd-O have also used
successfully as BD-R recording media [10, 11].