Patent ID: 7067183
Filing Date: 2006-06-27
Classification: G11B,Y10T

Abstract:
1. A write once recording medium (WORM) comprising: a substrate; a first protective layer on the substrate; an inorganic recording layer on the first protective layer, wherein the inorganic recording layer, upon heating via irradiation of a laser beam, is induced to undergo a local reaction and heat absorption to form a recorded mark with distinctive reflectivity, and the inorganic recording layer is made of materials comprising those as shown in formula I:  wherein A is comprised of silicon (Si) or tin (Sn); M is selected from the group consisting of aluminum (Al), silver (Ag), Gold (Au), Zinc (Zn), titanium (Ti), nickel (Ni), copper (Cu), cobalt (Co), tantalum (Ta), iron (Fe), tungsten (W), chromium (Cr), vanadium (V), gallium (Ga), lead (Pb), molybdenum (Mo), indium (In), and tellurium (Te); y is in the range of 0.02˜0.8; a second protective layer on the inorganic recording layer; and a reflective layer on the second protective layer.