Interactive optical disk, method of fabrication and...

Details Interactive optical disk, method of fabrication and... Interactive optical disk, method of fabrication and...

G - Physics

11

B

G11B 7/24 (2006.01) G11B 7/0045 (2006.01)

Patent

CA 2055454

2055454 9014663 PCTABS00002 A method and apparatus for recording and reading both permanently stored information (4) and user-supplied information (2) on an optical disk (Fig. 1) are disclosed. The optical disk (Fig. 3) is provided with permanent information via pits (102a, 102b) in a substrate (100) of the disk. User-supplied information (112a, 112b) is recorded in an expansion/retention layer (104) adjacent the substrate (100). The permanent (4, 102a, 102b) and user-supplied information (2, 112a, 112b) may be read via laser beams having unequal wavelengths.

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