DEVICE AND METHOD FOR PLASMA TREATMENT
PROBLEM TO BE SOLVED: To perform plasma treatment on an object to be treated in a high- density plasma atmosphere without giving damages to the object. SOLUTION: An upper electrode 21 and a susceptor 5, which is grounded through a blocking capacitor 6 independently from a treating vessel 2, are resp...
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Zusammenfassung: | PROBLEM TO BE SOLVED: To perform plasma treatment on an object to be treated in a high- density plasma atmosphere without giving damages to the object. SOLUTION: An upper electrode 21 and a susceptor 5, which is grounded through a blocking capacitor 6 independently from a treating vessel 2, are respectively provided in the upper and lower sections of the vessel 2 in a state where the electrode 21 and susceptor 5 are faced opposite to each other. The 380 kHz high-frequency power from a high-frequency power source 41 is impressed upon two electrodes through a transformer 42, in such a way that the phase of the power is shifted by 180 deg.. The 13.56 MHz high-frequency power from a high-frequency power source 51 is impressed upon the upper electrode 21. Since the density of plasma is controlled by the high-frequency power from the power source 51 and ion energy is controlled by the high-frequency power from the power source 41, high-selectivity plasma treatment can be performed on a wafer W, without giving damages to the wafer W. |
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