Author :
Yuan, Samuel W. ; Lee, E. ; Hsiao, W. ; Santini, H. ; Lam, H. ; Sui, G. ; Lam, T. ; Luo, Y. ; Madison, M. ; Nikitin, V. ; Webb, B. ; Shen, Y. ; Ramasubramanian, M. ; Jarratt, J. ; Hsiao, R. ; Harris, T. ; Sahami, S. ; Robertson, N. ; Freitas, D. ; Hsu, Y.
Author_Institution :
IBM Storage Technol. Div., San Jose, CA, USA
Abstract :
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.
Keywords :
error statistics; magnetic heads; magnetic moments; magnetic recording noise; 1.0 to 1.1 Gbit/s; 1.5 Gbit/s; 15 micron; bit-error rate; channel data rate; high data rate recording; high density recording; high moment poles; high-speed recording; soft error rate; spin-stand testing; stitched pole; sunken coil/P1 pedestal structure; track width; write efficiency; write head designs; writing parametrics; yoke length; Bit error rate; Coercive force; Coils; Disk recording; Driver circuits; Electronic equipment testing; Error analysis; Magnetic heads; Process design; Writing;
