Method for characterizing a perpendicular recording head...

Details Method for characterizing a perpendicular recording head... Method for characterizing a perpendicular recording head...

2005-11-29

2005-11-29

LeDynh, Bot (Department: 2862)

Electricity: measuring and testing

Magnetic

Magnetic information storage element testing

C360S110000, C360S125020, C360S031000

Reexamination Certificate

active

06969989

ABSTRACT:
A method characterizes a generally-trapezoidally-shaped portion of a writing pole of a perpendicular magnetic write head in proximity to a magnetic medium. The method includes providing measured track width data corresponding to magnetic track widths of a plurality of tracks written by the writing pole on a rotating magnetic medium underlying the writing pole. The magnetic track widths vary as a function of skew angle of the writing pole during writing. The method further includes determining a magnetic width of the wider of a leading edge and a trailing edge of the writing pole from a first portion of the measured track width data corresponding to a first range of skew angles. The method further includes determining at least one magnetic taper angle of the writing pole from the measured track width data.

REFERENCES:
patent: 6504675 (2003-01-01), Shukh et al.
patent: 6721131 (2004-04-01), Litvinov et al.
patent: 2003/0193742 (2003-10-01), Matono et al.
patent: 2004/0080856 (2004-04-01), Tomiyama et al.

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