A write-once disk with AlSi alloy was proposed and studied. A jitter of 6.5% and a modulation of larger than 0.8 were obtained at a linear velocity of 8.4 m/s. Jitter is less than 5% in the blue laser system at a clock frequency of 66 MHz and a linear speed of 8.25 m/s for track pitch of 0.68 and 0.45 µm disk.

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I. IntroductionWith the advantages of low cost, portability and compliance with ROM disc, write once disk has become the most popular storage media for computer and audio/video application. In addition, write once media, like CD-R and DVD-/+ R, are used to store permanent or nonalterable information, such as financial data transitions, legal documentation, and medical data. Several write once recording materials, such as TeO[1], TeOPd[2] and Si/Cu [3] have been proposed to realize inorganic write once media. Moreover, we propose AlSi alloy [4] to be used for recording layer of write once media. It had good recording properties in DVD system although the reflectivity is too low to be used for DVD-R disk. In this paper, we report the further results in blue laser system, such as the static and dynamic characteristics of write once media.

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