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The effects of N+ implantation under various conditions on CVD diamond films were analyzed with Raman spectroscopy, four-point probe method, X-ray diffraction (XRD), Rutherford backseattering spectroscopy (RBS), ultraviolet photoluminescence spectroscopy (UV-PL), Fourier transformation infrared absorption spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). The results show that the N+ implantation doping without any graphitization has been successfully realized when 100 keV N+ ions at a dosage of 2 × 1016 cm-2 were implanted into diamond films at 550℃ . UV-PL spectra indicate that the implanted N+ ions formed an electrically inactive deep-level impurity in diamond films. So the sheet resistance of the sample after N+ implantation changed little. Carbon nitride containing C≡N covalent bond has been successfully synthesized by 100 keV, 1.2×1018 N/cm2 N+ implantation into diamond films. Most of the implanted N+ ions formed C≡N covalent bonds with C atoms. The others were free state nitroge 相似文献
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当前,德国本国原料工业在许多领域中遇到一种挑战。在原料,能源及环保问题出现变化和困难面前,这些工业必须保持其兢争能力。这对原铝工业,尤为重要。在1979年,德意志联邦共和国共消费原铝 相似文献
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美国铝业协会宣布,美国铝工业每生产1磅铝的能耗,1980年下半年与1972年相比,下降了13%。铝业协会列举了78项节能的事例。其中包括:安 相似文献
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瑞士铝业公司将引进一种新品级bN镓,主要是用于发光二极管的生产。这一需用量比场化晶体管和微波晶体管的需要量略低。因此这种产品的价格比以往的半导体级镓低,所以可帮助该公司扩大这方面的市场。 bN级镓的纯度为99.9999%,1983年2月份开始 相似文献