Patent ID: 6038207
Filing Date: 2000-03-14
Classification: G11B

Abstract:
A recording medium having pits in which address and data information are formed for reproduction by irradiating a laser beam on said pits, said recording medium further containing a first reproducing film for generating said pits in which reflectance therefrom is reduced by irradiating said laser beam having a higher strength than a predetermined value, wherein a depth of pits in which address information is formed is between .lambda./8+n.lambda./2 and .lambda./6+n.lambda./2, where n is an integer and .lambda. is a wavelength of the laser beam, and wherein a depth of pits in which data information is formed is substantially .lambda./4+m.lambda./2, where m is an integer, and wherein a depth of grooves located on either side of said pits in which address and data information is formed is substantially .lambda./8, and wherein a spatial frequency of said pits in which address information is formed to be read out by said laser beam is less than a spatial frequency of said pits in which data information is formed to be read out by said laser beam.