Patent · US Active

Method for screening magnetic-recording heads

US8174781B2 · kind B2 · utility

2Cited by

13References

8Claims

0Family size

Assignee

Hitachi Global Storage Technologies Netherlands B.V. · NL

Inventors

Scott E. Heeren · San Jose, US
Masaki Kohno · San Jose, US
Tue Ngo · Milpitas, US

Key dates

Filing date	May 5, 2008
Grant date	May 8, 2012
Priority date	—
Expiry date	Mar 9, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG11B2220/2516
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A method for screening a magnetic-recording head utilizing a simulated-cross-track-gain profile of the magnetic-recording head to provide a manufacturing-qualified, magnetic-recording head. The method includes measuring a track profile of the magnetic-recording head, and providing the simulated-cross-track-gain profile of the magnetic-recording head synthesized utilizing the track profile of the magnetic-recording head. The method also includes calculating a peak-to-peak value of the simulated-cross-track-gain profile, and applying a selection criterion based on the peak-to-peak value of the simulated-cross-track-gain profile to screen the magnetic-recording head for use as the manufacturing-qualified, magnetic-recording head.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.