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半绝缘砷化镓(SI-GaAs)单晶中的微缺陷的研究
Research on Microdefects in SI-GaAs Single Crystal via TEM and EDTA
【摘要】 砷化镓 (GaAs)为第二代半导体材料 ,GaAs衬底质量直接影响器件性能。利用JEM 2 0 0 2透射电子显微镜 (TEM)及其主要附件X射线能量散射谱仪 (EDXA) ,对半绝缘砷化镓 (SI GaAs)单晶中微缺陷进行了研究。发现SI GaAs单晶中的微缺陷包含有富镓沉淀、富砷沉淀、砷沉淀、GaAs多晶颗粒和小位错回线等。还分析了微缺陷的形成机制。
【Abstract】 GaAs is one of the second-generation semiconductor materials and the quality of GaAs substrate has a direct influence on devices performance. Microdefects in SI-GaAs single crystal were researched via transmission electron microscope (TEM) and energy dispersion X-ray analysis (EDXA). It is found that microdefects in SI-GaAs have various forms such as As-riched micro-precipitates, As microdefects, Ga-riched microdefects, polycrystal particles and little dislocation loop. In addition, the formation mechanics of microdefects was discussed.
【Key words】 SI-GaAs; microdefect; little dislocation loop; precipitate nucleating center;
- 【文献出处】 稀有金属 ,Chinese Journal of Rare Metals , 编辑部邮箱 ,2004年03期
- 【分类号】TN304
- 【被引频次】12
- 【下载频次】287