Patent ID: 6861373

Claim:
A vacuum processing method comprising: placing an article to be processed in a reaction container and simultaneously supplying at least two high-frequency powers having mutually different frequencies to the same high-frequency electrode to generate plasma in the reaction container by the high-frequency powers introduced into the reaction container from the high-frequency electrode, thereby processing the article, wherein, when the frequency of one of the at least two high-frequency powers to be supplied to the high-frequency electrode is f 1 and its power value is P 1 , and the frequency of the other high-frequency power is f 2 and its power value is P 2 , the frequencies f 1 , f 2 and the power values P 1 , P 2 satisfy all the following three conditions (a) to (c): (a) 250 MHz≧f 1 >f 2 ≧10 MHz; (b) the power values P 1 and P 2 are the highest and next highest power values of the power values held by the high-frequency powers within the above frequency range (a), of the high-frequency powers supplied to the high-frequency electrode; and (c) 0.9≧P 2 /(P 1 +P 2 )≧0.1.