Recording member for laser beam and process for recording
AssigneeCanon Kabushiki Kaisha
InventorsMasanao Kasai, Hitoshi Hanadate, Yoshioki Hajimoto, Takashi Kitamura, Kiyonobu Endo
Life of this patent
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Abstract
A laser beam recording member capable of recording information by absorbing the radiation energy of a laser beam to cause a thermal melting deformation and/or evaporation removal at the portion exposed to the laser beam wherein the recording layer is composed of a non-metallic layer mainly composed of S, Se, Te or chalcogenide compounds thereof.
Claims10
A laser beam recording member which consists essentially of a recording layer disposed on a surface of a support and which has information in said recording layer in the form of a groove which extends at least to said surface of said support and which is formed directly therein by evaporation of the recording layer by means of the radiation energy of a laser beam in those portions exposed to the laser beam without application of further means, wherein said recording layer is from 10 microns 10 millimicrons in thickness and is composed of a non-metallic layer composed of a member selected from the group consisting of the chalcogen elements S, Se and Te, mixtures thereof and a chalcogenide compound of at least one of S, Se and Te with at least one of As, Bi, Sb, Ge, Si, Sn, In, Zn, Fe, Cu, Ag, Ni, Al, V and Pb.
A laser beam recording member which consists essentially of a recording layer disposed on a surface of a support and which has information in said recording layer in the form of a groove which extends at least to said surface of said support and which is formed directly therein by evaporation of the recording layer by means of the radiation energy of a laser beam in those portions exposed to the laser beam without application of further means, wherein said recording layer is composed of a laminate of a non-metallic layer and a metal layer, said non-metallic layer being from 10 microns to 10 millimicrons in thickness and being composed of a member selected from the group consisting of the chalocogen elements S, Se and Te, mixtures thereof and a chalcogenide compound of at least one of S, Se and Te with at least one of As, Bi, Sb, Ge, Si, Sn, In, Zn, Fe, Cu, Ag, Ni, Al, V and Pb, said metal layer being from 5 millimicrons to 200 millimicrons in thickness and being composed of a member selected from the group consisting of the metal elements Ag and Cu, and alloys containing at least one of Ag and Cu, wherein said Ag and Cu melts in said metal layer are capable of diffusing into said non-metallic layer when exposed to light to thereby expand the absorption range of said non-metallic layer to a long wavelength side of the visible light region or near the infrared region.
A process for laser beam recording which comprises exposing a recording member to a modulated laser beam, said recording member comprising a recording layer which is disposed on a surface of a support and which comprises a non-metallic layer which is from 10 microns to 10 millimicrons in thickness and is composed of a member selected from the group consisting of the chalcogen elements, S, Se and Te, mixtures thereof and a chalcogenide compound of at least one of S, Se and Te with at least one of As, Bi, Sb, Ge, Si, Sn, In, Zn, Fe, Cu, Ag, Ni, Al, V and Pb to thereby record information in the recording layer in the form of a groove which extends at least to said surface of said support and which is formed directly therein by evaporation of the recording layer by means of the radiation energy of said modulated laser beam in accordance with the pattern formed thereon by the modulated laser beam without application of further means.
A process for laser beam recording with comprises exposing a recording member to a modulated laser beam, said recording member comprising a recording layer disposed on a surface of a support and composed of a laminate of a non-metallic layer and a metal layer, said non-metallic layer being from 10 millimicrons in thickness and being composed of a member selected from the group consisting of the chalcogen elements S, Se and Te, mixtures thereof and a chalcogenide compound of at least one of S, Se and Te with at least one of As, Bi, Sb, Ge, Si, Sn, In, Zn, Fe, Cu, Ag, Ni, Al, V and Pb said metal layer being from 5 millimicrons to 200 millimicrons in thickness and being composed of a member selected from the group consisting of the metal elements Ag and Cu, and alloys containing at least one of Ag and Cu, wherein said Ag and Cu in said metal layer are capable of diffusing into said non-metallic layer when exposed to light to thereby expand the absorption range of said non-metallic layer to a long wavelength side of the viible light region or near the infrared region to thereby record information in the recording layer in the form of a groove which extends at least to said surface of said support and which is formed directly therein by evaporation of the recording layer by means of the radiation energy of said modulated laser beam in accordance with the pattern fromed thereon by the modulated laser beam without application of further means.
Dependencies are inferred from the claim text.