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
2005-03-17
2009-10-13
Angebranndt, Martin J (Department: 1795)
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, C428S064400, C428S064500, C369S275200, C369S275500
Reexamination Certificate
active
07601481
ABSTRACT:
The object of the present invention is to provide a multilayer phase-change information recording medium comprises a substrate, and N layers of information layer (N represents an integral number of 2 or more), and each of the information layers comprises at least a recording layer in which information is recorded by irradiating laser beam to induce a phase change between crystalline phase and amorphous phase. The present invention is characterized in that when the information layer is disposed so that a first information layer, a second information layer, a third information layer . . . , and N information layer are disposed in this sequence from the laser beam irradiation side, at least one information layer other than the N information layer comprises a lower protective layer, a recording layer, an upper protective layer, a reflective layer, and a thermal diffusion layer disposed in this sequence from the laser beam irradiation side; the thermal diffusion layer comprises at least indium (In) and oxygen (O) and further comprises any one of titanium (Ti) and zirconia (Zr); and the atomic ratio of indium (In) to all the metal elements in the thermal diffusion layer, In/all the metal elements, is 0.75 to 0.9.
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Machine translation of JP 2004-039039.
Machine translation of JP 2004-005938.
Noboru Yamada et al. (Apr. 2001) “Phase Change Material for Use in Rewritable Dual-layer Optical Disk Utilizing a Blue-violet Laser”, Optical Data Storage Topical Meeting 2001, Santa Fe, New Mexico, pp. 22-23.
Iwasa Hiroyuki
Shinkai Masaru
Shinotsuka Michiaki
Angebranndt Martin J
Cooper & Dunham LLP
Ricoh & Company, Ltd.
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