共查询到20条相似文献,搜索用时 281 毫秒
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对CMOS运算放大器LF7650进行了1MeV电子的电离辐照实验,研究了LF7650的总剂量辐射响应牧场生和抗总剂量辐射水平,并通过研究其照后在室温和100℃高温条件下电离辐照敏感参数随时间的变化关系,分析了在电离辐射环境下CMOS运算放大器的损伤机制及参数失效机理。 相似文献
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VT辐照模式pMOS剂量计的标定 总被引:3,自引:1,他引:2
对辐照偏置为阈值VT的pMOS剂量计进行了60Coγ射线和6MeV电子束的辐照标定,结果表明,在不低于102Gy(Si)的剂量范围内,这种变化的负栅偏电压下工作的pMOS剂量计呈现出线性响应,其适用于空间环境的响应灵敏度为20mV/Gy(Si)。同时发现,对60Coγ射线的响应灵敏度为对6MeV电子束的1.3倍左右。对实验结果进行了分析,认为pMOS剂量计的响应灵敏度与粒子辐射的种类具有一定的依赖性,提出了剂量计对混合辐射场的标定方法。 相似文献
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硅光电器件两种辐照效应的比较 总被引:3,自引:0,他引:3
比较了硅光电器件和MOS电容经300keV质子和1.25MeVγ射线辐照后的光电参数的变化,讨论了γ射线辐照的样管在150℃和200℃的退火效应,在硅器件的光谱响应范围内,将分光光度法得到的光电流谱用上述实验,有助于了解不同辐照引起的损伤在器件中的空间分布。 相似文献
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150、195和300keVAr离子在室温下辐照非晶态合金Co70.2Fe3. 9Nd3.9Si14B8和Co66Fe4.5V2.25Ni2.25Si10B15,扫描电镜在一定的辐照剂量范围观测到了表面发泡形成,发泡形成的临界剂量和直径随离能量增加而增加。Ar离子能量高于195keV时,发泡和发泡破裂是主要的表面损伤现象,而在150keVAr离子辐照下,未观测到发泡破裂。 相似文献
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介绍了一种利用等时退火法预估CMOS器件辐照后长时间等温退火行为的加速实验方怯。为了找到两种退火在时间上的相应关系,依据每一步等时退火相当于有相同电荷逃逸水平的等温退火时间。利用典型CC4007CMOS器件的25-250℃等时退火数据预估了100和25℃等温退火的长时间行为,预估结果和实验结果符合得很好。 相似文献
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Effects of growth ambience, annealing ambience and temperature on the photoluminescence (PL) emission properties of ZnO films deposited on Si (100) substrates by RF magnetron sputtering have been investigated. After annealing, the crystal quality of ZnO films was markedly improved, and the intensity of UV emission peak increased obviously. By varying the flow rate ratio of O2/Ar, annealing atmosphere in oxygen-deficient or oxygen-rich ambience and heating temperature during deposition, the evolution of peak intensities and positions for blue and green emission is formed. This is attributed to the deposition and annealing parameters that control the desorptions and adsorptions of oxygen atoms on the films, and leads to the changes of concentrations of Zinc and oxygen vacancies in the films. 相似文献
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滚轧法研制自支撑金属靶 总被引:2,自引:2,他引:0
文章叙述了用实验室型滚轧机研制了五十多种核靶的工艺过程。靶的厚度范围是0.3—20mg/cm~2,其均匀性用带电粒子能量损失法测量,一般好于96%。背散射测量表明,滚轧过程引入的杂质<0.2μg/cm~2。 相似文献
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Implantations of 100 keV In ions to high dose of 6 ×1016 In/cm2 were performed into a-axis oriented crystals of Al2O3 held at a liquid nitrogen temperature. The implantation produced about 80nm thick amorphous surface layer. Isothermal annealing in flowing Ar gas ambient was done at the temperatures of 600, 700, 800, and 900℃ . Rutherford backscattering and channeling (RBS-C), scanning electron microscope (SEM) and reflection high energy electron diffraction (RHEED) have been employed to investigate the annealing behaviors.The indium shows anomalous diffusion in amorphous layer. The migration of indium was composed of two parts: (a) some broadening of In profile corresponding to diffusion within the amorphous layer, (b) segregation of In to surface to form In2O3 which appears as islands on the surface. When the ambient is made oxygen free, the segregated In is lost by evaporation at the surface. 相似文献
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本文报道了用低能大面积电子束处理注砷硅片的实验结果。由四探针和背散射、沟道效应测量结果表明,用本方法退火的样品具有电激活率高和砷原子再分布小的优点。 相似文献
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I.O. Usov D. Koleske K.E. Sickafus 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》2009,267(17):2962-2964
We present a method of ion implantation doping of GaN, which permits reduced residual damage. The method consists of performing implantation in several steps with annealing between each step. Residual damage was analyzed by RBS/channeling and compared to a traditional implantation and annealing procedure. Better lattice recovery is clearly achieved using the alternating implantation and annealing approach. We attribute the efficient recovery to smaller damage amounts introduced during each implantation step, as well as to suppression of secondary defect formation. 相似文献