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US 6,480,960 B1Granted
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
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsYoshiho Gotoh, Mitsuaki Oshima, Shinichi Tanaka, Kenji Koishi, Mitsuro Moriya
Life of this patent
Estimating the term…
Abstract
A barcode is formed on an optical disk. An optical disk is provided which has a control data area and an identifier for indicating the presence or absence of the barcode in the control data area. A beam pattern is focused on a reflective film of the optical disk in an information signal region on which data is recorded. The optical disk is rotated to form the barcode.
Claims4
A method of for a barcode on an optical disk, said method comprising the steps of:
- a) providing said optical disk having a control data area and an identifier for indicating the presence or absence of said barcode in said control data area,
- b) focusing a beam pattern on a reflective film of said optical disk in an information signal region on which data is recorded, and
- c) rotating said optical disk while performing step b) to form said barcode.
Dependencies are inferred from the claim text.