共查询到18条相似文献,搜索用时 93 毫秒
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纳米CMOS电路的应变Si衬底制备技术 总被引:1,自引:1,他引:0
应变硅衬底材料——弛豫SiGe层作为应变硅技术应用的基础,其质量的好坏对应变硅器件性能有致命的影响。综述了近年来用于纳米CMOS电路的各类弛豫SiGe层的制备技术,并对弛豫SiGe层中应变测量技术进行了简单的介绍,以期推动应变硅技术在我国芯片业的应用。 相似文献
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多年以来,沿着摩尔定律的途径,人们一直采用对金属氧化物半导体场效应晶体管(MOSFET)进行等比例微缩来增加器件速度的方法。然而在晶体管尺寸达到65nm以后,常规的微缩方法遇到了以短沟道效应为核心的一系列问题。当器件进一步微缩,随着电流密度的增大,迁移率的提升成为保持晶体管性能的关键.因为电源电压被等比例缩小以降低芯片的动态功耗。 相似文献
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应变硅已成为延伸摩尔定律(Moore's Law)的重要技术手段之一.综述了应变硅技术的发展及趋势.首先,从物理理论上分析了应变对硅沟道迁移率的影响;然后介绍了现有的各种应变硅技术;最后,分析了应变硅技术的发展趋势. 相似文献
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本文研究了在不同氧剂量下,由氧注入绝缘体上在(SOI)衬底制得的CMOS器件的特性。结果表明,当氧剂量由2.25×10~(18)cm~(-2)减少到1.4 ×10~(18)cm~(-2)时,晶体管结泄漏电流改善了几个数量级。浮体效应(即在较低的栅电压下晶体管的导通状态,当漏极电压增大时,亚阈值斜率也大为改善)由于泄漏电流和氧剂量的减少而得到增强。采用1.4×10~(18)cm~(-2)氧剂量注入,并在1150℃退火的SOI衬底,其背沟迁移率比无沉淀物硅薄膜的迁移率降低了几个量级。这些器件特性与硅-氧化物埋层界面的微结构相关,这种微结构受氧注入及氧注入后退火的控制。 相似文献
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应变硅NMOS晶体管沟道应变的模拟研究 总被引:1,自引:1,他引:0
建立了一种基于硅/锗硅异质结构的应变硅NMOS晶体管的有限元模型,通过模拟研究了沟道区的应变分布及其与器件参数的关系。结果表明,提高锗硅虚拟衬底中锗的摩尔组分、减小应变硅层厚度,可以增加沟道应变。此外,应变量还随器件结构长度的增加而增加。研究结果可为应变硅器件的设计、工艺优化提供参考依据。 相似文献
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The wedge-shaped and leaf-type silicon light-emitting devices(LED)are designed and fabricated with the Singapore Chartered Semi Inc.’s dual-gate standard 0.35μm CMOS process.The basic structure of the two devices is N well-P+ junction.P+ area is the wedge-shaped structure,which is embedded in N well.The leaf-type silicon LED device is a combination of the three wedge-shaped LED devices.The main difference between the two devices is their different electrode distribution,which is mainly in order to analyze the application of electric field confinement(EFC).The devices’ micrographs were measured with the Olympus IC test microscope.The forward and reverse bias electrical characteristics of the devices were tested.Light measurements of the devices show that the electrode layout is very important when the electric field confinement is applied. 相似文献
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标准CMOS工艺下Si光电探测器的模拟与设计 总被引:1,自引:0,他引:1
设计了与标准CMOS工艺兼容的硅双光电探测器,并从理论上计算和分析了其绝对光谱响应.0.5μm CMOS工艺条件数值模拟结果显示,在无抗反射膜情况下该探测器在400~900nm波长范围内响应度都在0.2A/W以上,尤其是在短波长处效果比一般的探测器要好.还就反向偏压以及CMOS工艺中介质与钝化层等因素对探测器响应度的影响进行了讨论. 相似文献
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Benjamin G. Lee Daniel Hiller Jun‐Wei Luo Octavi E. Semonin Matthew C. Beard Margit Zacharias Paul Stradins 《Advanced functional materials》2012,22(15):3223-3232
The surface of silicon nanocrystals embedded in an oxide matrix can contain numerous interface defects. These defects strongly affect the nanocrystals’ photoluminescence efficiency and optical absorption. Dangling‐bond defects are nearly eliminated by H2 passivation, thus decreasing absorption below the quantum‐confined bandgap and enhancing PL efficiency by an order of magnitude. However, there remain numerous other defects seen in absorption by photothermal deflection spectroscopy; these defects cause non‐radiative recombination that limits the PL efficiency to <15%. Using atomistic pseudopotential simulations, we attribute these defects to two specific types of distorted bonds: Si‐Si and bridging Si‐O‐Si bonds between two Si atoms at the nanocrystal surface. 相似文献
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