Abstract:
PROBLEM TO BE SOLVED: To provide a method and an apparatus for forming a thin film having a thickness of 1 nm or less on the surface of a workpiece while controlling the thickness by utilizing plasma.SOLUTION: A plurality of microwaves 5 are introduced in a processing container 2 and, by using a plasma processing apparatus 1 of plasma generation system, plasma is generated while limiting the total power of the plurality of microwaves below 1 W/cmper area of a wafer W. In the plasma oxidation processing, rare gas for plasma generation and an oxygen-containing gas are used, the treatment temperature is set at 100°C or below, and the average oxidation rate during 30 seconds after start of microwave supply is set to 0.03 nm/sec or less. Impedance matching is not performed when igniting plasma by a plurality of microwaves, but performed when treating the wafer W by plasma.
Abstract:
PROBLEM TO BE SOLVED: To prevent the occurrence of a micro wave leak trouble with reliability by effectively blocking micro waves from leaking into an RF power-supply line used for micro wave discharge in the line.SOLUTION: The micro wave plasma processing apparatus comprises: a chamber 10; and a power-supply rod 34 for applying RF waves to a susceptor 12 for RF biasing which has an upper end connected to a lower face central portion of the susceptor 12, and a lower end connected to an RF output terminal of a matching device in a matching unit 32. Between the bottom face of the chamber 10 and the matching unit 32, a cylindrical external conductor 38 surrounding the power-supply rod 34 serving as an internal conductor is provided, whereby a coaxial line path 36 is formed. The apparatus further comprise: a choke mechanism 40 provided on the coaxial line 36 for blocking the space propagation of undesired micro waves which have entered the line from a plasma generation space in the chamber 10.
Abstract:
PROBLEM TO BE SOLVED: To provide a microwave generator capable of precisely controlling filament temperature of a magnetron for realizing long service life of the magnetron. SOLUTION: This microwave generator is provided with the magnetron 74 wherein a negative electrode 80 comprising a filament 78 and a positive electrode 82 comprising a cavity resonator 84 are arranged facing each other and which generates a microwave by oscillating when provided with a magnetic field, a filament power supply 98 supplying adjustable power to the filament, a filament current measuring part 100, a voltage measuring part 102 measuring the voltage applied to the filament, a resistance value calculation part 104 calculating a resistance value of the filament based on the measured current and voltage, a temperature calculation part 106 calculating the temperature of the filament based on the calculated resistance value and resistance-temperature dependence characteristics of the filament obtained in advance, and a power supply control part 110 controlling a filament power supply so that the temperature of the filament is kept within a prescribed temperature range. COPYRIGHT: (C)2007,JPO&INPIT