Multi-layered phase-change optical recording medium

Details Multi-layered phase-change optical recording medium Multi-layered phase-change optical recording medium

2007-08-30

2011-12-27

Mulvaney, Elizabeth (Department: 1785)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064500, C430S270130

Reexamination Certificate

active

08084113

ABSTRACT:
A multi-layered phase-change optical recording medium having a first substrate and a second substrate, and a plurality of information layers, wherein each of thermal diffusion layers of information layers other than an information layer disposed at the innermost side as viewed from the first substrate side has In oxide, Zn oxide, Sn oxide and Si oxide, and when the contents of thereof are represented by “a”, “b”, “c” and “d” [mol %] respectively, the following requirements are satisfied, and when the refractive index of the first and second substrates was represented by “n”, the laser light wavelength is represented by “λ” and the depth of the groove guide of the first and second substrates is represented by H, the H satisfied the following requirement,in-line-formulae description="In-line Formulae" end="lead"?3≦a≦50in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?0≦d≦30in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?a+b+c+d=100in-line-formulae description="In-line Formulae" end="tail"?in-line-formulae description="In-line Formulae" end="lead"?λ/17n≦H≦λ/11.5n.in-line-formulae description="In-line Formulae" end="tail"?

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Mar. 22, 2011 Taiwanese official action (with English translation) in connection with a counterpart Taiwanese patent application.

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