Optical recording medium

Details Optical recording medium Optical recording medium

2006-04-28

2008-09-23

Mulvaney, Elizabeth (Department: 1794)

Stock material or miscellaneous articles

Circular sheet or circular blank

C428S064400, C428S064800, C430S270110, C430S270140

Reexamination Certificate

active

07427432

ABSTRACT:
A dual-layer optical recording medium, which is formed by adhering a disk substrate (inverted-stack structure) formed by stacking a reflective layer (1) and a recording layer (1) on a substrate (1) and a disk substrate (conventional-stack structure) formed by sequentially stacking a recording layer (2) and a reflective layer (2) on a transparent substrate (2) with a transparent resin layer interposed therebetween, is prepared such that the transparent resin layer has a product obtained by multiplying the thickness by the elastic modulus at 25±5° C. falling within the range of not less than 2.0×104MPa·μm to not more than 30.0×104MPa·μm, resulting in suppressing excessive deformation involving an adjacent track portion produced by recording optical information in the recording layer (1) of the inverted-stack structure, thereby reducing crosstalk and providing satisfactory recording and/or reading characteristics in high-speed recording applications.

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