Title :
Dual-stripe MR heads for one gigabit per inch square recording density
Author :
Hsu, Y. ; Han, C.C. ; Chang, H. ; Ching, G. ; Hernandez, D. ; Chen, M.M. ; Ju, K. ; Che, C. ; Fitzpatrick, J.
Author_Institution :
Headway Technol., Milpitas, CA, USA
fDate :
11/1/1995 12:00:00 AM
Abstract :
The dual-stripe MR head configuration has advantages such as high signal amplitude, symmetrical waveform, symmetrical cross-track profile and thermal asperity immunity. We have designed, fabricated and tested dual-stripe MR heads for 1 Gb/in2 areal density. Small read gap-length (0.28 μm), narrow track width (2 μm read/3 μm write), low fly height (1.4 μin) and planarized shared poles are the key design parameters. Test results of these heads have shown typical isolated-pulse amplitude of 800 μVp-p, positive-negative peak amplitude ratio less than 10%, symmetrical track-profiles, and good stability. Using a PRML channel, we have demonstrated a linear bit density of 150 kbpi and a track density of 6700 tpi. The off-track capability is about 0.6 μm at the error rate of 10-7
Keywords :
magnetic heads; magnetoresistive devices; maximum likelihood detection; partial response channels; 0.28 micron; 1.4 micron; 2 micron; 3 micron; PRML channel; areal density; design parameters; dual-stripe MR head configuration; error rate; fly height; isolated-pulse amplitude; linear bit density; off-track capability; partial response maximum likelihood; planarized shared poles; positive-negative peak amplitude ratio; read gap-length; signal amplitude; symmetrical cross-track profile; symmetrical track-profiles; symmetrical waveform; thermal asperity immunity; track density; track width; Conductors; Disk recording; Error analysis; Magnetic heads; Magnetic recording; Magnetoresistance; Signal design; Signal to noise ratio; Stability; Testing;
Journal_Title :
Magnetics, IEEE Transactions on
