Master device for optical recording medium producing method, has secondary track structure exhibiting disruptions, which vary optically detectable surface property of recording medium such that auxiliary information is produced on medium

摘要

The device has a spiral-shaped or concentrically running main track structure, and a spiral-shaped or concentrically running secondary track structure that is arranged on a side of the main track structure. The secondary track structure exhibits disruptions, which vary an optically detectable surface property of a recording medium in such a manner that auxiliary information is produced on the recording medium. The storage medium exhibits a predetermined surface level, and the optically detectable surface property is a deviation from the surface level between two disruptions. Independent claims are also included for the following: (1) a device for manufacturing a master device (2) a method for manufacturing a master device.