Plasma generating apparatus, plasma generating method and remote plasma processing apparatus
First Claim
1. A plasma generating apparatus comprising:
- a microwave generating apparatus for generating microwaves with a predetermined wavelength;
a coaxial waveguide having a coaxial structure comprising an inner tube and an outer tube, an antenna being attached to one end of said inner tube, for directing the microwaves generated by said microwave generating apparatus to said antenna;
a resonator composed of dielectric material for holding said antenna; and
a chamber in which a specific process gas is fed for plasma excitation, said chamber having an open surface, said resonator being placed on said open surface, wherein said process gas is excited by the microwaves radiated from said antenna through said resonator into the interior of said chamber.
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Abstract
A compact plasma generating apparatus providing high efficiency of plasma excitation is presented. A plasma generating apparatus (100) comprises a microwave generating apparatus (10) for generating microwaves, a coaxial waveguide (20) having a coaxial structure comprising an inner tube (20a) and an outer tube (20b), a monopole antenna (21) being attached to one end of said inner tube (20a), for directing the microwaves generated by said microwave generating apparatus (10) to the monopole antenna (21), a resonator (22) composed of dielectric material for holding the monopole antenna (21), and a chamber (23) in which a specific process gas is fed for plasma excitation. The chamber (23) has an open surface and the resonator (22) is placed on this open surface, and the process gas is excited by the microwaves radiated from the monopole antenna (21) through the resonator (22) into the interior of the chamber (23) to generate plasma.
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Citations
17 Claims
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1. A plasma generating apparatus comprising:
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a microwave generating apparatus for generating microwaves with a predetermined wavelength;
a coaxial waveguide having a coaxial structure comprising an inner tube and an outer tube, an antenna being attached to one end of said inner tube, for directing the microwaves generated by said microwave generating apparatus to said antenna;
a resonator composed of dielectric material for holding said antenna; and
a chamber in which a specific process gas is fed for plasma excitation, said chamber having an open surface, said resonator being placed on said open surface, wherein said process gas is excited by the microwaves radiated from said antenna through said resonator into the interior of said chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A plasma generating method in a plasma generating apparatus comprising a plurality of antennas for radiating microwaves of a predetermined output level to a chamber in which a process gas is fed for plasma excitation, the method comprising the steps of:
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generating plasma by radiating microwaves from one or some of said plurality of antennas into the interior of said chamber to excite said process gas; and
stabilizing the plasma by radiating microwaves from all of said plurality of antennas into the interior of said chamber after the plasma generation.
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17. A remote plasma processing apparatus comprising:
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a plasma generating apparatus for exciting a specific process gas by microwaves; and
a substrate processing chamber for accommodating a substrate and providing specific processing to said substrate by the excited gas generated by exciting said process gas in said plasma generating apparatus, said plasma generating apparatus comprising;
a microwave generating apparatus for generating microwaves with a predetermined wavelength;
a coaxial waveguide having a coaxial structure comprising an inner tube and an outer tube, an antenna being attached to one end of said inner tube, for directing the microwaves generated by said microwave generating apparatus to said antenna;
a resonator composed of dielectric material for holding said antenna; and
a chamber in which a specific process gas is fed to be excited by the microwaves radiated from said antenna through said resonator for plasma excitation.
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Specification