Disk drive adjusting closed-loop fly height target based on change in open-loop fly height control signal

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9183864
SERIAL NO

13927109

Stats

ATTORNEY / AGENT: (SPONSORED)

Importance

Loading Importance Indicators... loading....

Abstract

See full text

A disk drive is disclosed comprising a head actuated over a disk, the head comprising a fly height actuator (FHA). A fly height of the head is measured, and a closed-loop fly height control signal is generated based on the measured fly height and a target fly height. The target fly height is adjusted based on a delta generated based on a change in an environmental condition, and an FHA control signal is applied to the FHA based on the closed-loop fly height control signal.

Loading the Abstract Image... loading....

First Claim

See full text

Family

Loading Family data... loading....

Patent Owner(s)

  • WESTERN DIGITAL TECHNOLOGIES, INC.

International Classification(s)

  • [Classification Symbol]
  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chia, Galvin T Rancho Santa Margarita, US 13 373
Haralson, Phillip S Laguna Niguel, US 10 91

Cited Art Landscape

Load Citation

Patent Citation Ranking

Forward Cite Landscape

Load Citation

Maintenance Fees

Fee Large entity fee small entity fee micro entity fee due date
11.5 Year Payment $7400.00 $3700.00 $1850.00 May 10, 2027
Fee Large entity fee small entity fee micro entity fee
Surcharge - 11.5 year - Late payment within 6 months $160.00 $80.00 $40.00
Surcharge after expiration - Late payment is unavoidable $700.00 $350.00 $175.00
Surcharge after expiration - Late payment is unintentional $1,640.00 $820.00 $410.00