Ten-Year Overview and Future Prospects of Write-Once Organic Recordable Media

Abstract

The CD-R market has grown rapidly since the development of this media in 1988. In addition, PC applications have continued to demand ever higher recording speeds. In order to achieve higher speed recording, it is necessary to reduce thermal interference during the recording process. Higher density recording is subject to the same effects of thermal interference as higher speed recording. To directly compare such thermal effects during recording on different density disks with different scanning velocities, we introduce a new parameter. Applying this parameter, it can be clearly demonstrated that thermal interference in higher density digital versatile disc-recordable (DVD-Rs) is approximately equal to that in 8x-speed recording with the lower density CD-R. Today, the possibility of 4x-speed DVD-R recording has already been confirmed. It can thus be concluded that write-once organic recordable media with a 15 GB capacity per 12 cm diameter disk format is very promising, because the thermal effects associated with the 15 GB recordable media are shown to be equivalent to those in 4x-speed DVD-R.