Optical recording medium

Details Optical recording medium Optical recording medium

2007-06-26

2007-06-26

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

Systems having plural physically distinct independent tracks...

Having layered storage medium

C369S275200, C369S121000, C369S283000, C369S288000

Reexamination Certificate

active

10480922

ABSTRACT:
A high-speed, write-once type optical recording medium, which utilizes laser light that is either blue or an even shorter wavelength, as well as an optical recording method and an optical recording apparatus for recording onto this optical recording medium.A high-speed, write-once type optical recording medium10having a recording layer18and a light transmission layer22formed sequentially on top of a support substrate12, wherein the recording layer18is formed by laminating first and second vice-recording layers18A,18B which include Al and Sb respectively as primary components, and irradiation of a laser light of blue wavelength from a laser light source24, through the light transmission layer22and onto the recording layer18, causes diffusion and mixing of the Al and Sb contained within the first and second vice-recording layers18A,18B, and this mixing enables the formation of a recording mark based on an irreversible change in reflectance. The thickness of the recording layer18is set to enable recording at a recording transfer rate of at least 35 Mbps.

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