Magnetization Distribution of Tb/in2 Class Hard Disks Recorded With Bit Printing and Edge Printing

In this paper, printing characteristics for the bit printing and the edge printing were compared by micromagnetic simulation. As a result, servo signal can be clearly recorded using both printing methods, and printing field dependence of printing performance for each method is considerably different. The transition of bit-printed magnetization is almost straight for any pattern, while that of edge-printed magnetization has several ridges. On the other hand, the edge printing is robust for the change in the printing field, compared with the bit printing.