Title :
TMR considerations at 5 Gb/in2 and 10 MB/s
Author :
Arnett, Patrick ; Tsang, Ching ; Diola, Tom ; Vo, Lang
Author_Institution :
IBM Res. Div., Almaden Res. Center, San Jose, CA, USA
fDate :
9/1/1997 12:00:00 AM
Abstract :
Successful error rate performance has been obtained at an areal density of 5 Gb/in2 using dual element (thin film inductive write/AMR read) heads and low noise, high resolution thin film media with a PRML channel operating at 10 MB/s. A detailed investigation of the TMR requirements to achieve these densities is reported here. This analysis allows the trade-offs between linear density and track density, wide/narrow write and read heads, and TMR to be explored in a single context. Clear differences in TMR requirements exist between the three head designs in this study even though all are capable of 5 Gb/in2 . The best head design requires a TMR of <0.24 μm which appears well within the demonstrated capability of several experimental submicron servo systems
Keywords :
magnetic heads; 10 MB/s; AMR read head; PRML channel; TMR; areal density; dual element head; error rate; linear density; noise; servo system; thin film inductive write head; thin film medium; track density; track misregistration; Disk drives; Disk recording; Enterprise resource planning; Error analysis; Finite impulse response filter; Magnetic heads; Maximum likelihood detection; Mean square error methods; Servomechanisms; Surface-mount technology; Time measurement; Transistors;
Journal_Title :
Magnetics, IEEE Transactions on
