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铜电镀工艺后表面的不平整度通常取决于版图关键特征,包括线宽,线间距和金属密度。本文设计了一款测试芯片并在一家半导体厂加工制造。版图特征效应被真正的测试数据所检查和验证。通过分析金属蝶形、介质腐蚀、金属厚度和SEM照片,得出一些结论。线宽是决定表面形貌及产生铜金属蝶形和介质层腐蚀的最关键因素。经过铜电镀工艺发现,铜线越细铜生长的越厚,铜线越宽铜金属蝶形越大,发现了3种典型表面形貌。而且,通过测试数据,量化版图特征的影响并用曲率增强加速剂覆盖率的理论解释,这可以用于开发铜电镀工艺模型和开展可制造性设计研究。 相似文献
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采用高温固溶法制备了Dy2O3,Sc2O3和Yb2O3多元掺杂YSZ材料,试样高温电导率得到大幅度提高(1000℃,0.18S/cm),但材料烧结性与机械强度有待改善.为此,在多元掺杂YSZ材料中继续掺入少量Al2O3和/或CaO以研究其影响.添加少量Al2O3提高了试样烧结密度( ~4.6%)和机械强度(~30%),而保持电导率变化不大;添加少量CaO虽然使烧结密度略微增大,但却降低了试样电导率(~50%)和机械强度.XRD分析显示试样保持稳定立方萤石结构,且晶格常数发生变化.显微结构分析表明,复合添加剂的掺入促进了晶粒的生长,晶粒尺寸较大. 相似文献
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A layout-pattern-dependent electroplating model is developed based on the physical mechanism of the electroplating process.Our proposed electroplating model has an advantage over former ones due to a consideration of the variation of copper deposition rate with different layout parameters during the process.The simulation results compared with silicon data demonstrate the improvement in accuracy. 相似文献
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铜化学机械抛光受几何图形特性如线宽、间距和图形密度的影响,芯片和晶圆上铜互连线厚度的不均匀性都会影响电性能和降低良率。本文从物理化学的角度对CMP工艺进行了回顾和分析,针对Cu CMP制造工艺和在MIT提出的(Pattern-Density Step-Height,PDSH)模型基础上,建立与工艺相对应的三步骤工艺模型。为了扑捉工艺与版图结构的相关性,设计了一款65纳米测试芯片并在SMIC完成工艺实验。按照模型参数提取流程,通过芯片测试数据提取模型参数和验证工艺模型。模拟结果与测试结果对比说明二者趋势完全一致,最大偏差小于5 nm。第三方测试数据进一步证明模型参数优化取得很好的结果。精准的Cu CMP工艺模型可以用于做芯片的DFM检查、显示和消除关键热点,从而确保芯片的良率和集成电路量产能力。 相似文献
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本文在回顾学术界对核心竞争力内涵及特征的研究基础上,综合论述了学者们关于企业核心竞争力的培养的观点,为培养地方中小企业核心竞争力提供一定的科学依据. 相似文献
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The non-planarity of a surface post electroplating process is usually dependent on variations of key layout characteristics including line width,line spacing and metal density.A test chip is designed and manufactured in a semiconductor foundry to test the layout dependency of the electroplating process.By checking test data such as field height,array height,step height and SEM photos,some conclusions are made.Line width is a critical factor of topographical shapes such as the step height and height difference.After the electroplating process,the fine line has a thicker copper thickness,while the wide line has the greatest step height.Three typical topographies, conformal-fill,supper-fill and over-fill,are observed.Moreover,quantified effects are found using the test data and explained by theory,which can be used to develop electroplating process modeling and design for manufacturability (DFM) research. 相似文献