共查询到19条相似文献,搜索用时 46 毫秒
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目前,随着集成电路规模的不断发展,传统的铝互连技术已由铜互连技术取代。铜的超填充主要采用Damascene工艺进行电镀。在电镀液中有机添加剂(包括加速剂、抑制剂和平坦剂)虽然含量很少,但对镀层性能的影响至关重要。本文以Enthone公司的ViaForm系列添加剂为例,研究了不同添加剂浓度组合对脉冲铜镀层性能的影响。 相似文献
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目前,随着集成电路规模的不断发展,传统的铝互连技术已由铜互连技术取代。铜的超填充主要采用Damascene工艺进行电镀。在电镀液中有机添加剂(包括加速剂、抑制剂和平坦剂)虽然含量很少,但对镀层性能的影响至关重要。本文以Enthone公司的ViaForm系列添加剂为例,研究了不同添加剂浓度组合对脉冲铜镀层性能的影响。 相似文献
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铜互连氮化硅薄膜沉积技术中电压衰减的研究 总被引:1,自引:0,他引:1
根据0.13 μm以下的深亚微米超大规模集成电路中先进的后道铜互连技术对于氮化硅薄膜沉积的具体要求,文章在大马士革工艺的基础上分析了可能导致铜互连失效的原因.进而在应用材料公司的PRODUCER(一种薄膜沉积设备)机台上,通过包括对氨等离子体预处理和氮化硅预沉积的这两步骤作实验研究.利用田口分析判断的实验方法,找到主要... 相似文献
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将空气引入Cu导线间形成空气隙,可有效降低等效介电常数K_(eff),但同时也使互连结构的机械稳定性面临着挑战。利用ANSYS进行了有限元热分析,研究了制备空气隙Cu互连结构的两种主流工艺过程,即CVD沉积法和热分解牺牲层法,模拟了Cu导线上的热应力变化趋势,并比较了两者的优劣,最终发现互连结构经过一系列热应力的循环作用后,各种材料在不同程度上都有较大的形变,这将影响结构的机械稳定性,甚至引起破坏。所以,需要进一步改善结构设计和使用理想电介质。 相似文献
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超深亚微米集成电路中的互连问题--低k介质与Cu的互连集成技术 总被引:22,自引:5,他引:22
半导体集成电路技术的发展对互连技术提出了新的需求,互连集成技术在近期和远期发展中将面临一系列技术和物理限制的挑战,其中Cu互连技术的发明是半导体集成电路技术领域中具有革命性的技术进展之一,也是互连集成技术的解决方案之一.在对互连集成技术中面临的技术与物理挑战的特点和可能的解决途径概括性介绍的基础上,重点介绍和评述了低k介质和Cu的互连集成技术及其所面临关键的技术问题,同时还对三维集成互连技术、RF互连技术和光互连技术等Cu互连集成技术之后的可能的新一代互连集成技术和未来互连技术的发展趋势给予了评述和展望. 相似文献
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Hsiao-Yun Chen Chih Chen Pu-Wei Wu Jia-Min Shieh Shing-Song Cheng Karl Hensen 《Journal of Electronic Materials》2008,37(2):224-230
Eutectic Sn-3.5wt.%Ag alloy is one of the most promising lead-free solders in low temperature processes for wafer bumping.
Near eutectic composition of deposited alloy films could be readily acquired by pulse electroplating with a proper combination
of active ingredients including K4P2O7, KI, Sn2P2O7, and AgI, as well as polyethylene glycol (PEG), with molecular weights of 200, 600, 2,000, and 4,000, as an inhibitive agent.
Pulse electroplating was carried out with current in alternating polarity to conduct electroplating and electropolishing sequentially.
As a result, alloy films with grains of less than 1 μm and uniform surface morphology can be obtained. The addition of PEG was necessary for the stabilization of the plating baths
to promote a wider process window for the desirable eutectic composition. Electrochemical characterization established that
PEG with molecular weight of 4,000 exhibited the strongest inhibition behavior. In contrast, PEG with molecular weight of
200 demonstrated the least interference. Energy dispersive X-ray and differential scanning calorimeter data confirmed the
formation of eutectic alloy as a function of deposition current density. X-ray diffraction results indicated that a biphasic
structures of β-Sn and ε-Ag3Sn was present in the as-deposited film. 相似文献
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S. H. Kang Y. S. Obeng M. A. Decker M. Oh S. M. Merchant S. K. Karthikeyan C. S. Seet A. S. Oates 《Journal of Electronic Materials》2001,30(12):1506-1512
This paper presents the effects of annealing, performed over a temperature range from 200°C to 400°C, on the surface microstructural
evolution and the electromigration reliability of electroplated Cu films. After annealing, a substantial increase in surface
roughness was observed, while variations in mean grain size and nanoindentation hardness were minor. Given the annealing temperature,
the surface roughness was larger for the films annealed in forming gas, due to the existence of hydrogen. In particular, the
films annealed at 400°C in forming gas demonstrated severe grain-boundary grooving and surface voiding. The defective nature
of the annealed surface can be alleviated by chemical-mechanical polishing (CMP), when annealing is conducted prior to the
CMP. However, it appears that a sequential thermal excursion at relatively high temperatures re-aggravates the integrity of
the Cu surface. This argument may be supported by the electromigration-test results on dual-damascene interconnects fabricated
using two different thermal profiles. The electromigration lifetimes were longer by more than a factor of two for the interconnects
that skipped a post-passivation anneal at 400°C. The experimental evidence presented in this work suggests that controlling
the integrity and quality of the Cu surface is an important step in ensuring good electromigration reliability. 相似文献
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