Abstract
Flying head sliders with constant spacing during head motion over a disk surface are designed. For this purpose, a powerful iterative method to solve the inverse problem is derived, wherein the slider operating attitude is obtained from a given load and a pivoting point. At first, static and dynamic Reynolds equations are solved to give not only the load and the pressure center, but also the stiffnesses of the lubricating film. Then unbalanced force and moments are divided by stiffnesses to provide new attitude parameters to be used in the next iteration. A newly designed slider having inclined grooved rails (IGR slider) is found to feature a minimum spacing variation of 3.9%, which is comparable to 3.3% obtained for the currently designed transverse pressure contour slider (TPC slider). The IGR slider has excellent dynamic characteristics of large damping even for a high-frequency region, while damping of the TPC slider decreases considerably to a negative value with increasing frequency.
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