Abstract

High speed rewritable digital versatile discs (DVD+RW) can be written well in a speed range from 3.3× to 8×. Special attention points for recording this type of discs are in the area of byte error rate (BER) and archival-overwrite. Archival-overwrite means that the disc is written with data, archived for some time and subsequently overwritten once. The cause of the high BER is unwanted nucleation near the trailing edge of the amorphous marks. This nucleation can be avoided by choosing proper cooling gap lengths in the write strategy. The raised jitter after archival-overwrite is caused by changes of the crystalline phase during aging. These changes might also endanger the reliability of the results of the optimum power control (OPC), which is performed prior to recording. By applying measures from both the drive side and the media side, a good archival-overwrite and a robust OPC-result is ensured.

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