Improved recording performance using side-shielded pole head in PMR drive

Author

Hong, Sooyoul ; Bekkers, Gerhard ; Lee, Hyung J.

Author_Institution

HDD R&D Center, Samsung Inf. Syst. America Inc., San Jose, CA, USA

Volume

40

Issue

4

fYear

2004

fDate

7/1/2004 12:00:00 AM

Firstpage

2374

Lastpage

2376

Abstract

A recording performance for the side shielded pole head (SSPH) with trapezoidal pole tip is compared to a conventional single pole head (CSPH) with the SiO₂ dispersed double-layered perpendicular magnetic recording (PMR) media. The SSPH showed 3 dB higher SNR, 22.5% enhanced D₅₀, and about 10 dB better NLTS compared to the CSPH design. Noise analysis showed the SSPH had lower noise than the CSPH. The lower transition noise and better NLTS is attributed to reduction of transition jitter in SSPH. The perpendicular magnetic recording drive having a storage capacity of 80 GB/platter has been successfully demonstrated with SSPH. Finally, the on-track bit-error rate (BER) measured for 10 sectors of a linear density of 653.2 kb/in at 7200 rpm was about 10 × 10^-6.7 for the SSPH design, about two orders improvement over the CSPH design.

Keywords

magnetic heads; magnetic recording noise; perpendicular magnetic recording; CSPH design; PMR drive; SSPH design; SiO₂; double-layered perpendicular magnetic recording; noise analysis; on-track bit-error rate; recording performance improvements; side-shielded pole head; transition jitter reduction; transition noise; trapezoidal pole tip; Bit error rate; Drives; Magnetic heads; Magnetic noise; Magnetic recording; Magnetic shielding; Optical recording; Perpendicular magnetic recording; Probes; Shape; Double-layered PMR media; perpendicular magnetic recording; side shielded pole head;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/TMAG.2004.834217

Filename

1325509