Radiation imagery chemistry: process – composition – or product th – Imaging affecting physical property of radiation sensitive... – Radiation sensitive composition or product or process of making
Reexamination Certificate
2007-07-24
2007-07-24
Angebranndt, Martin (Department: 1756)
Radiation imagery chemistry: process, composition, or product th
Imaging affecting physical property of radiation sensitive...
Radiation sensitive composition or product or process of making
C430S945000, C430S270190, C430S270180, C428S064800, C369S284000
Reexamination Certificate
active
10657205
ABSTRACT:
The present invention provides an optical recording medium that includes a recording layer composed mainly of an organic compound and can utilize blue-violet semiconductor laser light (390 to 420 nm in wavelength) as recording/reproducing laser light. The present invention also provides an optical recording/reproducing method using the optical recording medium. The optical recording medium1comprises at least a supporting substrate2; a recording layer3on the supporting substrate2, the recording layer3containing an organic compound as a major component; and a light-transmitting layer5on the recording layer3, the light-transmitting layer5being capable of transmitting laser light with a wavelength of 390 to 420 nm for recording and reproducing information. The organic compound in the recording layer3includes a trimethine cyanine dye that has the minimum value nminof its refractive index n (real part of the complex refractive index) within the range of 370 to 425 nm and has a refractive index n of 1.2 or lower with respect to the wavelength of the recording/reproducing laser light. The organic compound, when absorbing the laser light, melts or degrades to bring about a change in the refractive index, thereby effecting recording of the information.
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Machine translation of JP 2001-232945.
Machine translation of JP 06-295469.
Fisher et al., “A comparison of the absorption spectra of some typical symmetrical cyanine dyes”, Royal Soc. Proc., Series A, vol. 154 p. 703-722 (1936).
Beilenson et al., “A comparison of the absorption spectra of some typical unymmetrical cyanine dyes”, Royal Soc. Proc., Series A, vol. 163 p. 138-155 (1937).
Fukuzawa Narutoshi
Horai Takashi
Take Hiroshi
Angebranndt Martin
TDK Corporation
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