Electrical characteristics of a 500 Mb/in/sup 2/ slanted contact MR head

Several approaches to achieving high area density in rigid disc magnetic recording with magnetoresistive heads are currently being pursued. The mainstream approach has been dictated by the introduction of two IBM products. These products use soft-adjacent layer (SAL) transverse biasing and either ex...

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Bibliographic Details
Published inIEEE transactions on magnetics Vol. 30; no. 6; pp. 3846 - 3848
Main Authors Fernandez-de-Castro, J.J., George, P.K., Machelski, R.J.
Format Journal Article
LanguageEnglish
Published IEEE 01.11.1994
Subjects
Contacts
Couplings
Crosstalk
Electric variables
Geometry
Magnetic heads
Magnetic recording
Magnetoresistance
Permanent magnets
Probability distribution
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Summary:Several approaches to achieving high area density in rigid disc magnetic recording with magnetoresistive heads are currently being pursued. The mainstream approach has been dictated by the introduction of two IBM products. These products use soft-adjacent layer (SAL) transverse biasing and either exchange coupling or permanent magnet longitudinal biasing. Rotated current biasing, characteristic of barberpole and slanted contact (SC) biasing, offers the advantages of processing simplicity but suffers from a relatively wide read sensitivity function (RSF). The 45/spl deg/ contact geometry produces a long tail on one side of the RSF which causes excessive adjacent track crosstalk. It is possible to produce readwidths as narrow as 2.5 /spl mu/m by using the proper current direction and narrow contacts. This approach allows the practical implementation of 5000-6000 tpi devices and 500 Mb/in/sup 2/ technology. This paper describes the electrical characteristics of one such design and attempts to extrapolate the future performance of SC technology.< >
ISSN:0018-9464
1941-0069
DOI:10.1109/20.333920