Information recording carrier

1. An information recording carrier having minute pattern including plural grooves or lands formed to be substantially in parallel and adjacent each other, comprising:

a supporting body having a first minute pattern thereon;

a first recording layer formed on the first minute pattern;

a first light transmission layer formed on the first recording layer and having a second minute pattern on a side opposite to the first recording layer;

a second recording layer formed on the second minute pattern; and

a second light transmission layer formed on the second recording layer,

wherein when a pitch of each groove or land is P, a wavelength of a laser beam is λ and a numerical aperture of an objective lens is NA, the first and second minute patterns are formed under a relation of P<λ/NA;

wherein the plural grooves or lands include at least a wobbling region and data is recorded wobblingly in the wobbling region by frequency shift modulation; and

wherein digital recording using the frequency shift modulation is carried out by frequency shift modulation in which with a predetermined frequency having either of 1-100 waves as a channel bit, the frequency is changed over for each channel bit.

2. A method of reproducing the information recording carrier as recited in claim 1 , comprising:

irradiating the laser light on the first or second recording layer through the light transmission layer in such a way that the laser light tracks the grooves or lands therebeneath;

detecting the laser light reflected by the first or second recording layer; and

recognizing the frequencies that are used in frequency shift modulation through the detected laser light.