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US 7,067,183 B2Granted
Write once recording medium
AssigneeRitek Corporation
InventorsBing-Mau Chen, Hung-Fa Chen, Li-Chun Chung
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Abstract
A write once recording medium comprising an inorganic material serving as a recording layer is disclosed. The inorganic material has a formula, A(1−y)My, wherein A is comprised of Si or Sn; M is comprised of Al, Ag, Au, Zn, Ti, Ni, Cu, Co, Ta, Fe, W, Cr, V, Ga, Pb, Mo, In or Te; and y is in the range of 0.02˜0.8.
Claims17
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:
- A(1−y)My (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.
7 more elements
A WORM comprising:
- a substrate;
- and
- an inorganic recording layer on the first substrate 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:
- A(1−y)My (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.
4 more elements
Dependencies are inferred from the claim text.