Ronald Joseph Antonius Van Den Oetelaar

Format of an 8.5-GB double-layer DVD recordable disc

A single-sided double-layer DVD one-time recordable disc with a storage capacity of 8.5 GByte has been developed for the first time. The disc format is designed for maximum compatibility with existing DVD players and DVD read only drives. The physical format of the DVD+R double-layer disc is described in detail. Physical parameters, compatibility, double-layer effects and margins are discussed. At the end a short description of the logical format is given.

Compatible 8.5-Gbyte double-layer recordable DVD disc

A single-sided double-layer recordable DVD disc with a storage capacity of 8.5 Gbyte has been developed. Backwards compatibility with the existing DVD read-only format has been achieved through the use of organic dye recording layers that have intrinsically low absorption at lasers wavelength used for recording and reading. We describe the disc technology that we have developed, present recording results for both layers, and discuss double-layer effects. We demonstrate for the first time the feasibility of a compatible double-layer recordable DVD disc.