OPTICAL DISC HAVING UNIFORM STRUCTURE

摘要

AN OPTICAL DISC IS MANUFACTURED UNDER A UNIFORM CONDITION BY FORMING GROOVES (123) AND LANDS (125) ON THE ENTIRE SURFACE OF THE DISC. THE OPTICAL DISC IS CONFIGURED TO OBTAIN A RELIABLE REPRODUCTION SIGNAL, AND THE GROOVES AND LANDS ARE FORMED ON A LEAD-IN AREA (100), A USER DATA AREA (120) AND A LEAD-OUT AREA (130) OF THE OPTICAL DISC. SINCE THE SAME MANUFACTURING CONDITION CAN BE ADOPTED IN MASTERING DISCS, THE YIELD CAN BE ENHANCED AND THE MANUFACTURING COST CAN BE REDUCED.