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About Dual Layer Recording

Fujifilm DVD+R DL media utilize two dye-recording layers sandwiched between two polycarbonate bases and semi-reflective layers. Each recording layer consists of a "wobbled pre-groove" track that controls the rotation speed and addressing for that layer. A laser optic system focuses a beam of light on the dye layers, first "burning" the data to one layer, and then refocusing on the underlying layer to complete the recording.

The make up of the recording dye is very important to its ability to receive a pulse of energy from the laser that records the digitized data - while the disc is spinning at a very high speed. Additionally, in a double layer disc the energy must pass through one layer in order to record to the second layer. While a spacer layer separates the two recording layers to prevent cross layer recording, the dye formulation and recording "grooves" in dual layer discs must be optimized to minimize error.

The Fujifilm DVD+R DL media will be available in multiple disc packs and specialized use formats in Q4 2004 through key distributors, resellers and retail stores.

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