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This paper reports results of experimental investigations into the head–disk interface dynamics for the combination of the stiction free slider with super-smooth disk and the influences of disk roughness and lubricant thickness on the flying performance of stiction-free slider. The experiments were carried out with an optical head–disk interaction tester with which the tribologically interface used in the tester is still identical to the actual disk drive case The results indicate that the pad height on the air-bearing surface of the slider is one of the key parameters that determines the take-off and landing velocity of the slider. The flying performance of the slider strongly depends on the lubricant thickness when the disk speed is around the take-off velocity.

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