【摘要】：磁頭折片組件是由磁頭與懸臂折片組件通過環(huán)氧樹脂膠水粘合而成,其是實現(xiàn)硬盤高可靠性、低價格的關(guān)鍵環(huán)節(jié)。目前磁頭與懸臂折片之間的粘合生產(chǎn)工藝主要采用點涂環(huán)氧樹脂膠水然后再高溫固化或者UV光預(yù)固化然后再高溫固化,本課題主要研究采用激光輻照至磁頭表面產(chǎn)生熱輻射和熱傳導(dǎo)進而預(yù)固化環(huán)氧樹脂膠水的磁頭粘貼工藝。通過研究當(dāng)前的磁頭與懸臂折片之間的膠水固化方案,由此總結(jié)出激光預(yù)固化方案的可行性,并通過仿真與實驗結(jié)果分析了激光預(yù)固化方案的可行性,可以完成針對封閉式舌片結(jié)構(gòu)的懸臂折片的膠水的預(yù)固化,并且由此結(jié)合現(xiàn)有的磁頭裝配工序,設(shè)計開發(fā)了激光預(yù)固化系統(tǒng)。分析了激光光束分布對膠水激光預(yù)固化的影響,根據(jù)仿真實驗結(jié)果,激光光束在X和Y方向上相對磁頭中心的偏移會導(dǎo)致膠水的固化效果減弱,光束中心越接近磁頭中心,固化效果越好。由此設(shè)計了激光預(yù)固化系統(tǒng)的工裝夾具并且完成了該系統(tǒng)的設(shè)計工作。通過參數(shù)優(yōu)化實驗找到較優(yōu)的激光預(yù)固化粘合工藝參數(shù)。針對激光預(yù)固化之后的靜態(tài)俯仰角的離散問題,通過DOE分析了其影響原因。通過問題樣本的表征發(fā)現(xiàn)環(huán)氧樹脂膠水內(nèi)存在的細微氣泡是造成俯仰角變化的主要因素、工裝夾具對產(chǎn)品的靜態(tài)俯仰角影響細微,可以忽略;優(yōu)化環(huán)氧樹脂膠水的粘稠度可以使產(chǎn)品的靜態(tài)俯仰角的離散問題得到明顯改善。并且對激光預(yù)固化系統(tǒng)對磁頭微變形的影響進行了探討,通過相關(guān)實驗數(shù)據(jù)驗證優(yōu)化后的參數(shù)對磁頭極尖的影響微乎其微,而且對磁頭整個表面的微變形也非常小,從而驗證了當(dāng)前的激光預(yù)固化工序?qū)Υ蓬^本身的可靠性沒有顯著的影響,不會對磁頭本身的性能造成損害。
[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.
【學(xué)位授予單位】：哈爾濱工業(yè)大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：TP333.35

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