PLASMA PROCESSING APPARATUS AND PLASMA PROCESSING METHDO
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Abstract
In one embodiment, a plasma processing apparatus includes: a chamber; an introducing part; a counter electrode; a high-frequency power source; and a plurality of low-frequency power sources. A substrate electrode is disposed in the chamber, a substrate is directly or indirectly placed on the substrate electrode, and the substrate electrode has a plurality of electrode element groups. The introducing part introduces process gas into the chamber. The high-frequency power source outputs a high-frequency voltage for ionizing the process gas to generate plasma. The plurality of low-frequency power sources apply a plurality of low-frequency voltages of 20 MHz or less with mutually different phases for introducing ions from the plasma, to each of the plurality of electrode element groups.
35 Citations
36 Claims
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1-20. -20. (canceled)
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21. A plasma processing apparatus comprising:
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a chamber; an introducing part configured to introduce process gas into the chamber; a high-frequency power source configured to output a high-frequency voltage for ionizing the process gas to generate plasma; a substrate electrode disposed in the chamber and comprising a plurality of first electrode elements to a plurality of second electrode elements, each of the first electrode elements and each of the second electrode elements being alternately arranged; a substrate holder configured to hold a substrate between the substrate electrode and the plasma; a first and a second low-frequency power source configured to apply a first and a second low-frequency voltage of 20 MHz or less respectively to the first electrode elements and the second electrode elements to introduce ions in the plasma to the substrate, the first and second voltages having phases different from each other; and a rotator configured to rotate the substrate relatively to the substrate electrode; and a controller configured to control the rotator to rotate the substrate while the ions in the plasma are introduced to the substrate. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
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36. A plasma processing method, comprising:
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placing a substrate directly or indirectly on a substrate electrode in a chamber, the substrate electrode comprising a plurality of first electrode elements to a plurality of second electrode elements, each of the first electrode elements and each of the second electrode elements being sequentially arranged; introducing process gas into the chamber; ionizing the process gas in the chamber to generate plasma on the side of the substrate opposite from the substrate electrode; applying a first and a second low-frequency voltage of 20 MHz or less respectively to the first electrode elements and the second electrode elements to introduce ions in the plasma to the substrate, the first and second voltages having phases different from each other; and rotating the substrate relatively to the substrate electrode while the ions in the plasma are introduced to the substrate.
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Specification