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A plasma chemical vapor deposition reactor with an additional source of H atoms, in which concentrations of both H atoms and Cu-containing radicals are controllable independently, is developed to fill... fine patterns for interconnects with high-purity Cu. Cu-filling property in trench structure with the reactor is evaluated under deposition conditions of high-purity ( 100%) Cu films. The surface reaction probability β of Cu-containing radicals is deduced from the coverage shape of Cu deposition in the trench structure and its Monte Carlo simulation. With decreasing the main discharge power Pm, the β value decreases from 0.2 for Pm= 35W to 0.01 for Pm=3W. Using this reactor, we have realized filling of high purity Cu in a trench 0.3μm wide and 0.9,μm deep.続きを見る
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Mendeley出力
