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Advanced write heads for high density and high data rate recording

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25 Author(s)
Yuan, S.W. ; IBM Storage Technol. Div., San Jose, CA, USA ; Lee, E. ; Hsiao, W. ; Santini, H.
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Advanced write head designs improve write efficiency by reducing yoke length to less than 15 μm, adapting a sunken coil/P1 pedestal structure with stitched pole, and utilizing high moment poles with greater than 2 T moment. Sufficient bit-error rate was achieved up to 680 kBPI using heads with 50-60 GB/in2 dimensions. For wider track width heads, spin-stand testing showed good writing parametrics and soft error rate up to 1.0-1.1 Gb/s channel data rate, with product electronics and channels. The feasibility of high-speed recording up to 1.5 Gb/s is demonstrated using experimental write drivers.

Published in:

Magnetics, IEEE Transactions on  (Volume:38 ,  Issue: 5 )