High data rate recording at over 60 Mbytes per second

Arnett, P.; Olson, Ryan M.; Cheng, D.; Klaassen, K.B.; Peppen, J. van; Hsiao, Wen-Chien; Lee, E.; Werner, D.; Yuan, S.W.

doi:10.1109/20.800879

Cited by 12 publications

(3 citation statements)

References 9 publications

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“…Fujitsu and IBM reported 360 Mbit/s and 480 Mbit/s data rate capability, respectively, with conventional arm-electronics architecture [1], [2]. Here we report a data rate capability of 1000 Mbit/s achieved with our advanced write head architecture and dual synthetic spin-valve reader using conventional armelectronics architecture.…”

Section: Introductionmentioning

confidence: 58%

Demonstration of 1 Gbit/sec magnetic recording using an integrated inductive write/GMR read head

Shi¹,

Liu²,

Chen³

et al. 2000

IEEE Trans. Magn.

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1 Gbit/sec magnetic recording was demonstrated with integrated inductive write/GMR read heads on a thin film disk with a coercivity of 3200 Oe and an Mrt of 0.34 memu/cm 2 with a spinstand tester prototyped by Guzik Technical Enterprise. The write heads were made with high moment materials on both P1 and P2 and a densely packed coil using conventional manufacturing processes, and the read heads were made of dual synthetic spin valve sensor used for the 36 Gbit/in 2 areal density demonstration. The interconnect between the head and pre-amplifier is a pair of twisted wires of about 2 inch length. The demonstration was done at the outer diameter of the disk rotating at 15 000 RPM. With a modest 35 mA (0-P) write current, we achieved an overwrite of about 30 dB and an on track error rate of better than 10 7 . BER test on a disk with a coercivity of 4000 Oe also showed very good results.Index Terms-High data rate magnetic recording, inductive write head, spin-valve read head.

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Section: Introductionmentioning

confidence: 58%

Demonstration of 1 Gbit/sec magnetic recording using an integrated inductive write/GMR read head

Shi¹,

Liu²,

Chen³

et al. 2000

IEEE Trans. Magn.

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“…We have developed a high-purity Co-Ni-Fe-film write head with a of 2.0 T [1], [2] that can write in a medium with an of 560 A/m (7000 Oe) [3]. Writing speed is also an important consideration for higher data rate [4]. The resistivity of high-purity Co-Ni-Fe is relatively low ( m) and the write performance of heads made of this material was good at 60 MHz [3].…”

Section: Introductionmentioning

confidence: 99%

Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording

Nonaka

Honjo²,

Toba³

et al. 2000

IEEE Trans. Magn.

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We have developed a Co-Ni-Fe write head with a short yoke length for high-speed recording. By reducing the yoke length to 9 5 m, the eddy currents induced in a yoke with a relatively low resistivity (0 2 m) were reduced. The head of this short yoke had good write performance for a medium with a coercivity of 400 kA/m (5000 Oe) at frequencies up to 250 MHz (the overwrite less than 30 dB, and nonlinear transition shift less than 7%).Index Terms-Eddy currents, highmaterial, high-speed recording, short yoke length, write head.

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“…Increasing linear density and faster access time drives rapid acceleration of data rate. Previous high data rate recording demonstrations have used experimental write drivers [1], [2]. In this paper, we will review the design, process, and performance of IBM's advanced write heads for high density and high data rate applications, using both product-level and experimental write drivers.…”

Section: Introductionmentioning

confidence: 99%

Advanced write heads for high density and high data rate recording

et al. 2002

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Advanced write head designs improve write efficiency, by reducing yoke length to less than 15 m, adapting a sunken coil/P1 pedestal structure with stitched pole, and utilizing high moment poles with greater than 2 Tesla moment. Sufficient bit-error rate was achieved up to 680 kBPI, using heads with 50-60 GB/in 2 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. Feasibility of high-speed recording up to 1.5 Gb/s is demonstrated using experimental write drivers.Index Terms-High data rate, high moment, write head.

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High data rate recording at over 60 Mbytes per second

Cited by 12 publications

References 9 publications

Demonstration of 1 Gbit/sec magnetic recording using an integrated inductive write/GMR read head

Demonstration of 1 Gbit/sec magnetic recording using an integrated inductive write/GMR read head

Co-Ni-Fe write heads with a 10-μm yoke length for high-speed recording

Advanced write heads for high density and high data rate recording

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