| US 7,520,001 B2 | ||
| Optical disk, an optical disk barcode forming method, an optical disk reproduction apparatus, a marking forming apparatus, a method of forming a laser marking on an optical disk, and a method of manufacturing an optical disk | ||
| Yoshiho Gotoh, Osaka (Japan); Mitsuaki Oshima, Kyoto (Japan); Shinichi Tanaka, Kyoto (Japan); Kenji Koishi, Sanda (Japan); and Mitsuro Moriya, Ikoma (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Filed on Jan. 25, 2006, as Appl. No. 11/339,224. | ||
| Application 11/339224 is a continuation of application No. 10/067171, filed on Feb. 04, 2002, granted, now 7,110,544. | ||
| Application 10/067171 is a continuation of application No. 09/595139, filed on Jun. 15, 2000, granted, now 6,457,128, filed on Sep. 24, 2002. | ||
| Application 09/595139 is a continuation of application No. 09/441338, filed on Nov. 16, 1999, granted, now 6,141,419, filed on Oct. 31, 2000. | ||
| Application 09/441338 is a continuation of application No. 08/649411, filed on May 16, 1996, granted, now 6,052,465, filed on Apr. 18, 2000. | ||
| Claims priority of application No. 7-261247 (JP), filed on Oct. 09, 1995; and application No. 8-008910 (JP), filed on Jan. 23, 1996. | ||
| Prior Publication US 2006/0131407 A1, Jun. 22, 2006 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06F 21/24 (2006.01) | ||
| U.S. Cl. 726—30 [380/201; 380/203; 713/193; 369/278; 369/275.3; 369/275.4; 270/52.02] | 11 Claims |
| 1. A method of forming a barcode on an optical disk, said method comprising;
a) providing the optical disk which has a substrate having a track thereon, a reflective layer disposed over the track and
an identifier, the identifier indicating the presence or absence of the barcode on the optical disk; and
b) trimming a part of the reflective layer with laser beam to form the barcode,
wherein at least a part of the barcode is formed on the track, the substrate of the optical disk has a control data area thereon,
said control data area containing physical feature information of the optical disk, and
the barcode is formed on a region which is located inwardly to the control data area.
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