Patent Number: 7,787,742

Title: Compact optical permanent read-only recording discs with read-write sections enabling users to write data to personalize the discs to the users' needs

Abstract: A consumer is provided with an implementation to personalize his compact optical recording discs. A compact optical recording disc comprising a primary section including a read-only permanent digital data recording, and an ancillary read-write section enabling a user to digitally record data to thereby personalize the recording disc to the needs of the user. The section including the read-only permanent digital recording is on a spiral track on said recording disc, and the read-write section is on a spiral track extension continuous with the continuous track. The read-only spiral track comprises a layer of sequential bumps defining the permanent digital data recording pattern, and the read-write spiral track extension comprises a smooth layer of laser beam sensitive material, the material reversibly darkens upon exposure to define the digital data recording pattern.

Inventors: Dietz; Timothy Alan (Austin, TX), Kobrosly; Walid (Round Rock, TX), Malik; Nadeem (Austin, TX)

Assignee: International Business Machines Corporation

International Classification: H04N 5/91 (20060101); H04N 7/26 (20060101)

Expiration Date: 8/31/12018