Patent ID: 7760462
Filing Date: 2010-07-20
Classification: G11B

Abstract:
1. A method of controlling a flying height of a head slider having a heating element that controls the flying height, the method comprising the steps of: measuring a first correlation value between an air pressure and a heating element sensitivity of the head slider; measuring a second correlation value between the air pressure and the flying height of the head slider; calculating a reference heating-element sensitivity at normal air pressure from the first correlation value; measuring a current heating element sensitivity of the heating element when the head slider is lifted and calculating the difference between the current heating element sensitivity and the reference heating-element sensitivity to calculate an amount of variation in air pressure from the first correlation value; and calculating an amount of variation in the flying height of the head slider from the amount of variation in air pressure and the second correlation value and controlling the heating element to adjust the flying height of the head slider.