High speed magnetic recording

Author

Klaassen, K.B. ; Hirko, R.G. ; Contreras, J.T.

Author_Institution

IBM Almaden Res. Center, San Jose, CA, USA

Volume

34

Issue

4

fYear

1998

fDate

7/1/1998 12:00:00 AM

Firstpage

1822

Lastpage

1827

Abstract

The maximum recording speed of a magnetic data storage device depends on the components in the recording channel, viz. electronics, interconnects, heads and media. The projected increase in device data rate (6-fold in 5 years) is higher than that for the electronics (silicon switching speed, 4-fold in 5 years). Driving the write head meets with “driving point impedance” limitations, linking the required MMF, the interconnect and head inductance, supply voltage and write current switching speed. Novel write drivers can break this link. Interconnect limitations and distributed read/write electronics are discussed. Write field waveforms and their dependence on the write current are presented. Various ways of improving the head switching time are treated. Finally, for the projected data rate increase to materialize, one has to solve all component limitations virtually simultaneously

Keywords

magnetic heads; magnetic recording; device data rate; driving point impedance; electronics; head switching time; high speed magnetic recording; interconnects; supply voltage; write current switching speed; write drivers; write head; Driver circuits; Impedance; Inductance; Joining processes; Magnetic devices; Magnetic heads; Magnetic recording; Memory; Silicon; Voltage;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.706718

Filename

706718