Optical recording medium having at least two recordable layers

Details Optical recording medium having at least two recordable layers Optical recording medium having at least two recordable layers

2006-09-12

2006-09-12

Miller, Brian E. (Department: 2627)

Dynamic information storage or retrieval

Storage medium structure

Layered

C369S283000

Reexamination Certificate

active

07106687

ABSTRACT:
An optical recording medium having at least two information carrier layers, on which information can be written by means of a focused light beam. In the present invention, a separating layer is arranged between the information carrier layers and a respective transparent covering layer is arranged between the information carrier layer and the surface of the recording medium, the thickness of each transparent covering layer substantially exceeds that of the respective information carrier layer. One object of the present invention is to propose an optical recording medium in the which it is possible to write to both information carrier layers using a low optical power. Further objects of the invention are to specify an apparatus and also a suitable method for writing to recording medium according to the present invention. A recording medium according to the invention has information carrier layers which are both semi-transparent.

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