Novel characterization and control of recorded track edges

A novel technique for characterization of track widths was developed, offer ing much improved measurement precision over previous methods. Using this t echnique, the effects of media parameters, such as coercivity, H-c, remanen t-moment-thickness-product, M(r)t, orientation ratio and carbon overcoat th ickness, and head parameters, such as write current, recording frequency, w ere studied. The results revealed that the recording track edges are critic al to performance of a recording system. Proper control of track edges thro ugh selected media and head parameters can optimize the recording performan ce in the disk drive.