共查询到17条相似文献,搜索用时 109 毫秒
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He Guorong Yang Guohu Zheng Wanhu Wu Xuming Wang Xiaodong Cao Yulian Wang Qing Chen Lianghui 《半导体学报》2006,27(11):1906-1910
在考虑材料热膨胀系数随温度变化后,采用有限元方法结合ANSYS软件对Si/GaAs键合热应力进行了分析,研究了普通应力、轴向应力和剪切力的分布云图和沿界面的分布. 同时提出了新的键合结构以减小热应力的影响,计算结果证明了该结构的有效性. 相似文献
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通过实验和理论计算,分析了InP/Si键合过程中,界面热应力的分布情况、影响键合结果的关键应力因素及退火温度的允许范围。分析结果表明,由剪切应力和晶片弯矩决定的界面正应力是晶片中心区域大面积键合失败的主要原因,为保证良好的键合质量,InP/Si键合退火温度应该在300~350℃范围内选取。具体实验验证表明,该理论计算值与实验结果相一致。最后,在300℃退火条件下,很好地实现了2inInP/Si晶片键合,红外图像显示,界面几乎没有空洞和裂隙存在,有效键合面积超过90%。 相似文献
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As a result of the large difference in thermal expansion coefficients between metal and Si, high stresses can develop in thin
metallic films attached to Si substrates in microelectronic devices during thermal excursions experienced in processing steps
or during usage. These stresses may induce plastic deformation of the thin films accompanied by creep and interfacial sliding,
and have a pronounced effect on the reliability of microelectronic devices and components. Even though various methods have
been proposed to study thermal stress, methodologies for studying plastic deformation of thin films are not well established.
Here, we report the results of a study of plastic deformation and interfacial sliding of thin Al and Cu films on Si substrates
during thermal cycling. Cross-sectional profiles of pattern-grown Al and Cu films of nominally 250 nm thickness were measured
before and after thermal cycling by employing an atomic force microscope. Through statistical analysis, the size changes of
the thin films induced by thermal cycling were determined. Finite element (FE) analyses were conducted to compute the stress
and strain states within the thin film and at the interface, and the results were utilized to interpret the atomic force microscopy
(AFM) observations. Experiments revealed that, following thermal cycling, Al films expanded relative to the Si substrate,
whereas Cu films shrank, resulting in an alteration of the film-footprint on the substrate in both cases. Based on the FE
calculations, this was attributed to net inelastic deformation of the thin films via creep and yielding, with the deformation
being accommodated at the interface by diffusion-controlled interfacial sliding. 相似文献
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应变Si技术是目前延续摩尔定理,推动集成电路高速发展的重要技术,本文从单轴应变Si技术提升器件结构出发,基于基本的器件物理方程,建立单轴应变Si器件电流-电压模型,该模型充分考虑了应力等因素对阈值电压和电流的影响,仿真结果表明仿真结果与试验结果一致. 相似文献
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陈福荫 《固体电子学研究与进展》1991,11(2):137-142
本文应用普适参数紧束缚方法计算了GaAs/Si异质中界面组成、键能、自然键长、力常数以及键的弛豫等性质.由键能和力常数推断As和Ga原子均能在界面处与Si原子成键,但Si-As键更强一些,考虑到Si和Ga原子在界面的互扩散作用,提出了界面层的可能生长机理.作者认为界面层应由SiAs和GaSi组成的膺合金Ga_xA(?)_(1-x)Si构成,根据价带极大值随组分x的变化,指出x的范围处在0.1~0.6之间.由键的弛豫效应预示x的最佳范围在0.1~0.3之间.由此设想,通过控制组分,有可能使由晶格畸变产生的界面应力减至比较小,从而为消除因晶格畸变产生的应力缺陷给出了理论依据. 相似文献
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针对化合物半导体与Si基晶圆异质集成中的热失配问题,利用有限元分析方法开展GaAs半导体与Si晶片键合匹配偏差及影响因素研究,建立了101.6 mm(4英寸)GaAs/Si晶圆片键合匹配偏差评估的三维仿真模型,研究了不同键合结构和工艺对GaAs/Si晶圆级键合匹配的影响,系统分析了键合温度、键合压力、键合介质厚度及摩擦特性等因素对键合偏差影响的规律。结果表明,键合压力和键合层摩擦系数对键合偏差的影响极大,并通过对上述因素的优化,其匹配偏差可控制到3μm以内。 相似文献
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本文采用Si/Si直接键合制备p~+/n~-、n~-/n~-结构的工艺原理及方法。通过实验,摸索出了一种有效的表面清洗-高温处理Si/Si键合工艺;采用该工艺制出了p~+/n~-、n~-/n~-样片;对键合的微观结构、键合强度、杂质分布及电接触特性进行了检测。 相似文献
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建立了SMA 薄膜/基片的耦合数学模型,对溅射在基片上的SMA 薄膜产生驱动的过程进行了仿真模拟,结果表明SMA 薄膜/ 基片的耦合驱动是双金属效应和形状记忆效应的双重结果,该驱动力比单纯双金属效应产生的驱动力大得多。该模型对于实际应用SMA 薄膜/基片结构进行微驱动的器件设计具有理论指导意义。 相似文献