Patent ID: 7746589
Filing Date: 2010-06-29
Classification: B82Y,G11B

Abstract:
1. A bit patterned medium comprising: a substrate; and a recording layer including a plurality of bit cells separated from each other along a plurality of tracks forming concentric circles having different radii on the substrate, wherein each track includes a super track having a plurality of sub-tracks, and bit cells formed on one of the sub-tracks are arranged at different positions in a circumference direction of the recording layer to bit cells formed on adjacent sub-tracks, wherein if a number of the plurality of sub-tracks is N, N bit cells are arranged adjacent to each other in a radius direction of the super track to cause interference of a reproduction signal due to bit cell data of each bit cell of the N bit cells, and when the bit cell data stored in the N bit cells is simultaneously read, an interval X between every two adjacent bit cells of the N bit cells in the circumference direction is determined so that at a predetermined position corresponding to one bit cell of the N bit cells, 2