Abstract
Slider flying instability due to intermolecular force in a head disk interface (HDI) with a 3-5 nm mechanical spacing is a barrier to achieving a 1 Tb/in^2 magnetic recording areal density. A better understanding of the intermolecular force and how to decrease its effect are becoming very important subjects for HDI researchers studying non-contact interfaces. In this paper, a probability model taking account of surface roughness is used to calculate the intermolecular force between disk and slider surfaces with certain roughnesses. A slider with controlled texture/roughness is simulated, and the results indicate that the surface with controlled roughness/texture can greatly reduce the intermolecular force acting on the air bearing surface (ABS).
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