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在纳米间隙条件下,以楔型滑块和双轨式磁头为例,推导出楔型及双轨式磁头范德华力的计算公式,考察了范德华力对计算机磁头/磁盘超薄气膜承载性能的影响.结果表明,范德华力对计算机磁头/磁盘的承载性能影响很大,范德华力可以降低磁头的承载能力,尤其在最小空气间隙小于6 nm时;在相同尺寸的磁头中,双轨式磁头的范德华力小于楔型滑块的范德华力,而前者的承载力大于后者,双轨式磁头的范德华力对其承载性能影响较小.范德华力可以使飞行高度降低,为磁头设计和磁头/磁盘装配的重要依据.
Under the conditions of nanogap, wedge-type slider and dual-rail head are taken as an example to deduce the formulas of van der Waals force of wedge-type and dual-rail head. The influence of van der Waals forces on the bearing performance of ultra-thin film of magnetic head / disk is investigated. The results show that the van der Waals forces have a great influence on the bearing capacity of computer head / disk. Van der Waal’s force can reduce the carrying capacity of the head, especially when the minimum air gap is less than 6 nm. In the same size head, the van der Waals force of the dual- Van der Waals force wedge slider, while the former bearing capacity greater than the latter, the van der Waals force of the dual-rail head has a smaller impact on its carrying capacity Van der Waals forces can reduce the flight height for head design and head / disk assembly an important basis .