Patent ID: 7413788

Claim:
A write-once-read-many optical recording medium comprising: a first inorganic thin film; and an organic thin film, wherein the first inorganic thin film comprises at least “R” and “O”, wherein “R” represents at least one element selected from the group consisting of Y, Bi, In, Mo, V and lanthanum series elements; and “O” represents oxygen atom, the organic thin film comprises a colorant wherein the colorant is selected from the group consisting of polymethine colorant, naphthalocyanine colorant, phthalocyanine colorant, squarylium colorant, chroconium colorant, pyrylium colorant, naphthoquinone colorant, anthraquinone colorant, xanthene colorant, tripenylmethane colorant, azulene colorant, tetrahydrocholine colorant, phenanthrene colorant, triphenothiazine colorant, azo colorant, formazan colorant, and metal complex thereof, and the organic thin film is capable of suppressing at least one of deformation and breakage of the first inorganic thin film and receiving the change of state of the first inorganic thin film.