Lubricant transfer and slider–lubricant interaction at ultra-low flying height

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With the decrease in slider flying height, slider–lubricant–disk interaction is becoming increasingly important for the ultra-low flying height head–disk interface because the interaction results in potential slider flying stability problems. In this study, a method to study slider–lubricant interaction quantitatively is developed. The relative amount of lubricant transferred by a slider from a lubed disk surface can be determined. The parameters of slider air bearing surface (ABS) related to the lubricant transfer and the slider–lubricant interaction are identified. It is an effective strategy to minimize the lubricant transfer and the slider–lubricant interaction by reducing the slider effective length and width, which are directly related to the size of slider trailing edge pads.