| US RE40,969 E1 | ||
| Mark forming apparatus, method of forming laser mark on optical disk, reproducing apparatus, optical disk and method of producing optical disk | ||
| Mitsuaki Oshima, Kyoto (Japan); and Yoshiho Gotoh, Osaka (Japan) | ||
| Assigned to Panasonic Corporation, Osaka (Japan) | ||
| Filed on Dec. 07, 2001, as Appl. No. 10/17,965. | ||
| Application 08/560015 is a division of application No. 09/588364, filed on Jun. 02, 2000. | ||
| Application 10/017965 is a reissue of application No. 08/560015, filed on Nov. 17, 1995, now 5,761,301, filed on Jun. 02, 1998. | ||
| Claims priority of application No. 6-283415 (JP), filed on Nov. 17, 1994; application No. 7-016153 (JP), filed on Feb. 02, 1995; and application No. 7-261247 (JP), filed on Oct. 09, 1995. | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. G06K 19/06 (2006.01) | ||
| U.S. Cl. 726—30 [726/26; 726/31; 726/33; 380/201; 380/203; 235/494; 705/51; 705/56; 705/57; 705/62] | 2 Claims |
| [ 29. A method of manufacturing an optical disk comprising the steps of:
forming a track of spiral shape on a substrate of the optical disk;
forming a reflective layer on the track; and
forming a barcode pattern by removing a portion of the reflective layer with a laser,
wherein said barcode pattern has a plurality of bars, each bar extending in a radial direction.]
|