Patent ID: 7025857

Claim:
A plasma treatment apparatus comprising: a vacuum container ( 2 ) in which a process target is processed with use of a gas turned into plasma; plasma generation electrodes ( 8 , 5 ) which are arranged in said vacuum container; high frequency power sources ( 50 , 51 ) which generate a high frequency electricity to be supplied to said plasma generation electrodes; power feeding bars ( 19 , 32 ) which conduct a high frequency electricity generated by said high frequency power sources to said plasma generation electrodes; matching boxes ( 20 , 34 ) which include matching circuits ( 21 a , 34 a ) for matching input impedances to said plasma generation electrodes and output impedances of said high frequency power sources; and contact devices ( 23 , 40 ) which establish electric contact between output terminals of said matching circuits ( 21 a , 34 a ) for outputting a high frequency electricity and input terminals of said power feeding bars for inputting the high frequency electricity, wherein said contact devices are structured such that they can establish electric contact between said matching circuits and said power feeding bars after positioning of said power feeding bars ( 19 , 32 ) and said matching boxes ( 20 , 34 ) is completed.