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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Pressure dependence of Ar-2(+), ArTi+, and Ti-2(+) dimer formation in a magnetron sputtering discharge
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Pressure dependence of Ar-2(+), ArTi+, and Ti-2(+) dimer formation in a magnetron sputtering discharge

机译:Ar-2(+),ARTI +和Ti-2(+)二聚体形成在磁控溅射放电中的压力依赖性

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摘要

Formation of Ar+ and Ti+ monomers and of Ar-2(+), ArTi+, and Ti-2(+) dimer ions in a magnetron sputtering discharge with a Ti cathode and at argon gas pressures of 0.3-2.1 Pa was investigated by means of energy-resolved mass spectrometry. An unbalanced 2 inch magnetron operated in direct current mode with a power of 150 W (typical operation voltage -365 V) was employed. Energy spectra of Ar+ and Ti+ ions show distinct features which are related to the specific formation processes taking place at the Ti cathode or resulting from gas phase reactions. Formation of Ar-2(+), ArTi+, and Ti-2(+) dimer ions show pronounced pressure dependencies which can be attributed to distinct formation and loss processes. Ti-2(+) ions originate from direct sputtering of Ti-2 dimers and the subsequent ionization in the plasma region above the cathode.
机译:通过用Ti阴极和0.3-2.1Pa的氩气,在磁控溅射放电中形成Ar +和Ti +单体和Ar-2(+),Arti +和Ti-2(+)二聚体离子,并通过0.3-2.1Pa的氩气。 能量分辨质谱。 采用了一种不平衡的2英寸磁控管,采用电流为150W(典型操作电压-365 V)的电流模式。 AR +和Ti +离子的能谱显示出与在Ti阴极处进行的特定形成过程或由气相反应产生的特异性特征有关。 AR-2(+),ARTI +和TI-2(+)二聚体离子的形成显示了明显的压力依赖性,其可归因于不同的形成和损耗过程。 Ti-2(+)离子源于Ti-2二聚体的直接溅射和在阴极上方的等离子体区域中随后的电离。

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