HGA的磁头装配激光预固化系统的开发

发布时间：2018-09-10 06:46

【摘要】：磁头折片组件是由磁头与悬臂折片组件通过环氧树脂胶水粘合而成,其是实现硬盘高可靠性、低价格的关键环节。目前磁头与悬臂折片之间的粘合生产工艺主要采用点涂环氧树脂胶水然后再高温固化或者UV光预固化然后再高温固化,本课题主要研究采用激光辐照至磁头表面产生热辐射和热传导进而预固化环氧树脂胶水的磁头粘贴工艺。通过研究当前的磁头与悬臂折片之间的胶水固化方案,由此总结出激光预固化方案的可行性,并通过仿真与实验结果分析了激光预固化方案的可行性,可以完成针对封闭式舌片结构的悬臂折片的胶水的预固化,并且由此结合现有的磁头装配工序,设计开发了激光预固化系统。分析了激光光束分布对胶水激光预固化的影响,根据仿真实验结果,激光光束在X和Y方向上相对磁头中心的偏移会导致胶水的固化效果减弱,光束中心越接近磁头中心,固化效果越好。由此设计了激光预固化系统的工装夹具并且完成了该系统的设计工作。通过参数优化实验找到较优的激光预固化粘合工艺参数。针对激光预固化之后的静态俯仰角的离散问题,通过DOE分析了其影响原因。通过问题样本的表征发现环氧树脂胶水内存在的细微气泡是造成俯仰角变化的主要因素、工装夹具对产品的静态俯仰角影响细微,可以忽略;优化环氧树脂胶水的粘稠度可以使产品的静态俯仰角的离散问题得到明显改善。并且对激光预固化系统对磁头微变形的影响进行了探讨,通过相关实验数据验证优化后的参数对磁头极尖的影响微乎其微,而且对磁头整个表面的微变形也非常小,从而验证了当前的激光预固化工序对磁头本身的可靠性没有显著的影响,不会对磁头本身的性能造成损害。
[Abstract]:The magnetic head folding module is composed of the magnetic head and the cantilever folding piece assembly bonded by epoxy resin glue, which is the key link to realize the high reliability and low price of the hard disk. At present, the bonding process between the magnetic head and the cantilever folding plate is mainly made of dot-coated epoxy resin glue and then high temperature curing or UV light precuring and then high temperature curing. In this paper, the magnetic head bonding technology of precuring epoxy resin glue produced by laser irradiation and heat conduction on the magnetic head surface is studied. The feasibility of laser precuring scheme is summarized by studying the current glue curing scheme between magnetic head and cantilever folding plate, and the feasibility of laser precuring scheme is analyzed by simulation and experimental results. The presolidification of the glue for the cantilever folding plate with closed tongue structure can be completed, and the laser precuring system is designed and developed in combination with the existing assembly procedure of the magnetic head. The effect of laser beam distribution on the precuring of glue laser is analyzed. According to the simulation results, the deviation of laser beam in X and Y directions relative to the magnetic head center will lead to the weakening of the solidification effect of glue, and the closer the beam center is to the magnetic head center, The better the curing effect. The fixture of laser pre-curing system is designed and the design of the system is completed. The optimum process parameters of laser precuring bonding were found by parameter optimization experiment. Aiming at the discrete problem of static pitch angle after laser presolidification, the influence reasons are analyzed by DOE. It is found that the minor bubble in epoxy resin glue is the main factor to cause the change of pitch angle, and the static pitch angle of the product can be neglected because of the influence of fixture on the static pitch angle of the product. Optimizing the viscosity of epoxy resin glue can obviously improve the dispersion problem of static pitch angle. The effect of laser precuring system on the microdeformation of the magnetic head is discussed. The optimized parameters have little effect on the tip of the magnetic head, and the micro-deformation of the whole surface of the head is very small. It is verified that the current laser precuring process has no significant effect on the reliability of the magnetic head itself and will not damage the performance of the head itself.
【学位授予单位】：哈尔滨工业大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TP333.35

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