Multi-Channel Write and GMR Heads for Over-1TB Tape System

Metal Evaporated Media

“…The corresponding track margin was 0.25 mm, which allowed recording a barium-ferrite tape medium at 57 ktpi with 0.2-mm-wide GMR readers (Cherubini et al, 2011). Alternatively, multichannel recording and nontracking read systems have been proposed to alleviate the mechanical accuracy requirements for tracking on flexible media (Fukuda et al, 2006;Tamakawa et al, 2006). Using a 4-channels write head and a 8-channels GMR read head, recording over 15 ktpi has been demonstrated in a prototype helical-scan drive with a Co-CoO metal evaporated medium (Fukuda et al, 2006;Tamakawa et al, 2006).…”

“…Alternatively, multichannel recording and nontracking read systems have been proposed to alleviate the mechanical accuracy requirements for tracking on flexible media (Fukuda et al, 2006;Tamakawa et al, 2006). Using a 4-channels write head and a 8-channels GMR read head, recording over 15 ktpi has been demonstrated in a prototype helical-scan drive with a Co-CoO metal evaporated medium (Fukuda et al, 2006;Tamakawa et al, 2006). Figure 2.18 shows an Magnetic Force Microscopy (MFM) image of the adjacent tracks written at 15 ktpi on the metal evaporated medium.…”