Method and apparatus for estimating and controlling the flying height of a read-write head in a hard disk drive
AssigneeSamsung Electronics Co., Ltd.
InventorsHaesung Kwon, Vinod Sharma, Hyung Lee
Life of this patent
Estimating the term…
Abstract
Method estimating flying height of read-write head in slider near rotating disk surface. Sensing leakage current between slider and spindle motor to create potential difference measurement. Converting potential difference measurement to create estimate of flying height. Method controlling flying height using method for estimating by adjusting vertical actuation signal to micro-actuator assembly. Embodiments implement these methods. Embedded circuit and hard disk drive, each including the apparatus. The invention includes methods of manufacturing and their products.
Claims37
A method for estimating the flying height of a read-write head in a slider near a rotating disk surface included in a hard disk drive, comprising the steps:
- sensing a leakage current between said slider and a spindle motor electrically coupling through a spindle to said rotating disk surface to create a potential difference measurement;
- and
- converting said potential difference measurement to create an estimate of said flying height of said read-write head near said rotating disk surface.
Dependencies are inferred from the claim text.