Multilayer optical recording medium and recording method on...

Details Multilayer optical recording medium and recording method on... Multilayer optical recording medium and recording method on...

2011-05-10

2011-05-10

Chow, Van N (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Optical track structure

C369S275200, C369S059110, C369S047520, C369S094000

Reexamination Certificate

active

07940634

ABSTRACT:
In a multilayer optical recording medium having three or more recording layers, when data is recorded on a recording layer far away from an incident surface of laser light, and especially on a recording layer farthest away from the incident surface of the laser light, by applying the laser light, the recording power margin of the farthest recording layer allows for a variation in the optimal recording sensitivity even if the transmittance of the recording layers located between the laser light incident surface side and the target recording layer is varied due to existing recordings and the amount of the laser light passing therethrough is also varied. In this case, the recording layer which is the farthest from an incident surface of laser light has a phase change recording film, and the recording layer which is the nearest from the incident surface of the laser light has a write-once read-multiple recording film.

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