材料和几何尺寸对充气硬盘磁头滑块飞行特性的影响

Effects of Materials and Geometric Dimensions on the Flying Characteristics of a Slider in Gas-Filled Hard Disk Drives

摘要: 随着硬盘磁记录密度增加，磁头滑块的飞行高度已经小于10纳米，当硬盘遭受外界冲击载荷时，磁头滑块飞行特性参数(最小飞行高度hm、俯仰角α和侧倾角β)会随时间发生变化。通过求解磁头/磁盘界面气膜润滑方程和建立硬盘结构系统有限元模型，本文研究了硬盘外壳材料、悬臂材料、磁盘材料、悬臂厚度、磁盘厚度对磁头滑块飞行特性的影响。研究结果发现：磁盘材料和厚度对磁头滑块飞行特性参数影响较小，悬臂材料和厚度对磁头滑块飞行特性参数影响最大；对于各种不同材料，当硬盘外壳材料为ABS塑料时，磁头滑块飞行特性参数的变化幅度相对最小。

Abstract: With increasing of the magnetic recording density in hard disk drives (HDDs), the flying height of the slider is less than 10 nm. When a HDD is subjected to external shock loadings, the flying para-meters of the slider, including the minimum flying height, the pitch angle, the roll angle, will change over time. By solving the gas film lubrication equation in the head/disk interface and establishing a structural finite element model of a HDD system, effects of HDD cover materials, suspension materials, disk materials, suspension thickness, disk thickness, on the flying characteristics of the slider are studied in this paper. The results show that the disk materials and thicknesses have a less effect on the flying parameters of the slider, the effects of suspension materials and thicknesses on the flying characteristics of the slider are obvious. The flying parameters of the slider are changed least for a HDD with an ABS plastic cover among the studied different materials.