Patent ID: 6661749
Filing Date: 2003-12-09
Classification: G11B

Abstract:
A substrate for an optical recording medium comprising:a plurality of recording tracks formed at least in guide grooves on a disc; and an address section comprising an address pit sequence formed between said recording tracks in said guide grooves along an information reading direction of said recording tracks, and wherein: said recording tracks in said guide grooves are divided into a prescribed number of zones, in each of said zones, the center of said address section corresponding at least to the recording track in the radially outermost or radially innermost guide groove is disposed so as to shift in a radial direction of said disc in relative relationship to the center of said recording track in said guide groove, and said substrate is used to produce an optical recording medium, and the amount and direction of shift of the center of said address section are determined so as to offset the amount and direction of shift of the center of said address section that appear in a signal reproduced from said optical recording medium when said optical recording medium is produced using a calibration substrate on which the amount of shift of the center of said address section is set to zero.