Patent · US Active

Disk drive performing lifetime logging of microactuator sensitivity

US8605384B1 · kind B1 · utility

110Cited by

20References

24Claims

0Family size

Assignee

Western Digital Technologies, Inc. · US

Inventors

Yanning Liu · San Jose, US
Chuanwen Ji · Lake Forest, US
Duc T. Phan · Colonia Juarez, US
Ming Wang · Shanghai, CN

Key dates

Filing date	Nov 6, 2012
Grant date	Dec 10, 2013
Priority date	—
Expiry date	Nov 6, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG11B5/483
WIPO fieldAudio-visual technology
WIPO sectorElectrical engineering

Abstract

A disk drive is disclosed comprising a head, a disk surface, and a voice coil motor (VCM) and a microactuator operable to actuate the head over the disk surface. A sensitivity of the microactuator is periodically measured over a lifetime of the microactuator. Each measured sensitivity is stored in a timeline log, wherein the timeline log represents a degradation curve of the microactuator over the lifetime of the microactuator.

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