Optical information recording medium

Abstract

Abstract PURPOSE:To facilitate the automation of process control and shipping inspection without impairing disk quality by forming identification information such as serial numbers of optical disks in information tracks. CONSTITUTION:Tracking patterns 1, information recording patterns 2 and identification information patterns formed by dropping out part of the tracking patterns are formed. These patterns are an information recording area 4 and the identification information such as serial numbers 5 with a completed disk plate. The reading of the identification information by visual observation or optically is thereby enabled, by which the automation in the process control and shipping inspection is facilitated. Since the generation of dust at the time of forming the identification information is obviated, the rate of non-defective articles is improved.

Inventors

• 👤 Toshimitsu Tanaka

Bibliographic Details