Back to results
US 2003/0157290 A1Published application
Optical information recording medium
AssigneeCMC Magnetics Corporation
InventorsSue-Min Yeh, Kao-Ming Chang, Wen-Pin Chiu, Lii-Chyuan Tsai
Life of this patent
Estimating the term…
Abstract
An optical information recording medium with a recording layer enables a recording and reproducing to be effected with a 650 nm (or further) laser beam, and the recording layer contains at least one kind of the trimethine-cyanine dye which is a compound represented by the following general formula [1], [2], [3], [4]. 1 The “EWG” represents any electron-withdrawing substituted group such as cyano or nitro group.
Claims4
An optical information recording medium provided on a substrate with a recording layer, said recording layer contains at least one kind of the trimethine-cyanine dye,
- wherein said trimethine-cyanine dye can be represented by the following general formula [1], [2], [3], [4];
- 20
- wherein said “EWG” represents any electron-withdrawing substituted group;
- wherein said “R1” and “R2” may be the same or different from each other and are individually substituted or unsubstitued alkyl, phenyl, benzyl, alkylphenyl or phenoxyalkyl group;
- wherein said “R3” and “R4” may be the same or different from each other and are hydrogen atom, halogen atom, alkoxy, hydroxyl, alkyl group;
- wherein said “Y” may be hydrogen atom, halogen atom or alkyl group;
- and
- wherein said “X−” is an anion selected from the group consisting of F−, Cl−, Br−, I−, ClO4−, BF4−, PF6−, SbF6−, OTs−, OMs−, SCN−, alkylsulfonate, akylcarboxylate.
5 more elements
Dependencies are inferred from the claim text.