摘要:
In a plasma processing system, microwaves generated by a microwave generator (86) are guided to a plane antenna (62) to introduce the microwaves, which are attenuated exponentially, into a processing vessel (22) in which an object to be processed (W) is subjected to a plasma process. A microwave absorbing means (96) is disposed in a peripheral portion of the plane antenna (62) to absorb the microwaves propagating from a central portion of the plane antenna and to control the amount of reflected microwave. Thus the amount of the microwaves reflected toward the central portion of the plane antenna (62) by a peripheral portion of the plane antenna (62) is reduced to some extent so that electromagnetic field intensity is distributed uniformly.
摘要:
A microwave plasma processing apparatus includes a processing vessel, a microwave generator, a waveguide guiding a microwave formed by the microwave generator, and a microwave emitting member emitting the microwave with wavelength compression by a retardation plate, wherein the waveguide has a single microwave output opening in a location corresponding to a central par of the microwave emitting member.
摘要:
An antenna having a waveguide structure and comprising a base of a thin flat metal; a radiation plate of a thin flat metal arranged in parallel with the base at a distance from the base; and a plurality of thin flat metal side walls secured to the base and radiation plate, and arranged in the space between the base and the radiation plate so as to form a plurality of waveguides connected to each other. The radiation plate and the side walls are joined by spot-welding at given intervals. The base and the side walls are preferably in the form of a single block made of a metallic material.
摘要:
A microwave plasma processing device, comprising a processing container (12), a microwave generator (24), a wave guide tube (22) for guiding microwave from the microwave generator (24), and a microwave radiating member (19) for radiating the microwave having a wave length shortened by a wave-slowing plate (18) into a space inside the processing container, the wave guide tube (22) further comprising a single microwave output opening (22a) located at the position thereof corresponding to the center portion of the microwave radiating member (19).
摘要:
In the plasma processor, the microwaves generated from a microwave generator (86) are led to a plane antenna (62), which in turn introduces exponentially attenuating microwaves into a container (22) that processes an object (W) in plasma. Microwave absorption means (96) provided in the circumference of the plane antenna (62) absorbs microwaves propagating from the center of the plane antenna (62) and suppresses the reflection. As a result, the microwaves reflected in the circumference of the plane antenna (62) and returned to the center are decreased to some degree, and the electromagnetic field distribution of the microwave becomes uniform.
摘要:
A slotted waveguide antenna comprises a plurality of radiating waveguides (38-1, 38-2,...) having at least one radiating slot (40), a feed waveguide (36) for feeding to the radiating waveguides (38-1, 38-2,...), and coupling apertures arranged between the feed waveguide (36) and the radiating waveguides (38-1, 38-2,...) at a distance of an integer multiple of teh guide wavelength (λ g ) of the feed waveguide (36). The plurality of radiating waveguides (38-1, 38-2,...) are disposed in parallel to form an array in a manner that the radiating slots (40) in the respective radiating waveguides (38-1, 38-2,...) are directed in the same direction. The feed waveguide (36) is on the same plane as the array formed by the radiating waveguides (38-1, 38-2,...). The transverse width of each radiating waveguide is one half of the distance between the adjacent coupling apertures (46-1, 46-2,...). The coupling apertures (46-1, 46-2,...) provided on the feed waveguide (36) supply electromagnetic waves having the same amplitude and the same phase to each radiating waveguide (38-1, 38-2,...). The feed waveguide (36) and the radiating waveguides (38-1, 38-2,...) are arranged integrally on the same plane so that the overall structure is planar. The structure of the antenna is simple, so that the antenna is manufactured easily and inexpensively.
摘要:
A slotted waveguide antenna comprises a plurality of radiating waveguides (38-1, 38-2,...) having at least one radiating slot (40), a feed waveguide (36) for feeding to the radiating waveguides (38-1, 38-2,...), and coupling apertures arranged between the feed waveguide (36) and the radiating waveguides (38-1, 38-2,...) at a distance of an integer multiple of teh guide wavelength (λ g ) of the feed waveguide (36). The plurality of radiating waveguides (38-1, 38-2,...) are disposed in parallel to form an array in a manner that the radiating slots (40) in the respective radiating waveguides (38-1, 38-2,...) are directed in the same direction. The feed waveguide (36) is on the same plane as the array formed by the radiating waveguides (38-1, 38-2,...). The transverse width of each radiating waveguide is one half of the distance between the adjacent coupling apertures (46-1, 46-2,...). The coupling apertures (46-1, 46-2,...) provided on the feed waveguide (36) supply electromagnetic waves having the same amplitude and the same phase to each radiating waveguide (38-1, 38-2,...). The feed waveguide (36) and the radiating waveguides (38-1, 38-2,...) are arranged integrally on the same plane so that the overall structure is planar. The structure of the antenna is simple, so that the antenna is manufactured easily and inexpensively.