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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

  • US 6,480,960 B1
  • Filed: 11/15/2000
  • Issued: 11/12/2002
  • Est. Priority Date: 10/09/1995
  • Status: Expired due to Term
First Claim
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1. 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.

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