Abstract:
A plasma apparatus which generates a radio frequency (UHF or microwave) disk plasma (16) and a hybrid plasma (45) derived from the disk plasma. The microwave plasma acts as a source of excited ion and free radical species and electrons for the second plasma which is hybrid in that it contains species from both microwave and dc (or rf depending on bias) excitation. The hybrid plasma can be used to treat an article (43) with different species than are present in the disk plasma and provides more control in this regard than a single plasma.
Abstract:
The apparatus for treating the inside surface of a bottle (1) in a plasma enhanced process comprises a vacuum chamber (2), a microwave confinement (3) with a microwave generator (4), evacuation means and gas feed means (5). The microwave confinement (3) is substantially cylindrical and adapted to the shape of at least the body portion of the bottle (1) to be treated as closely as possible. The microwaves are coupled into the microwave confinement (3) from the bottom side of the bottle (1) and the microwave confinement is excited in a TM mode of resonance. The inventive apparatus is very compact and very simple. It can be integrated into a stretch-blow-moulding apparatus or into a filling apparatus. For upscaling, a plurality of one-bottle apparatuses is arranged in a row or in a matrix and all the one-bottle apparatuses are connected to a net of energy, vacuum and gas supply lines. Each of the one-bottle apparatuses may have its own vacuum chamber or a plurality of microwave confinements (3) may be arranged in one common vacuum chamber.
Abstract:
Eine Vorrichtung (10) zum Beschichten optischer Gläser mittels plasmaunterstützter chemischer Dampfabscheidung (CVD) wird vorgeschlagen. Ein zylindrischer Reaktor (12) dient zur Aufnahme der zu beschichtenden Gläser. Mindestens ein Mikrowellengenerator (24a, 24b) ist zum Einkoppeln eines Mikrowellensignals vorbestimmter Mikrowellenfrequenz in den Reaktor (12) vorgesehen. Der mindestens eine Mikrowellengenerator (24a, 24b) weist eine Mikrowellenquelle (26a, 26b) auf, die über ein Moden-Interferenzfilter (30a, 30b) an den Reaktor (12) gekoppelt ist
Abstract:
A plasma discharge device and method for removing material from a substrate having dynamic tuning, which permits operation with a variety of process gasses over a range of operating conditions. A longitudinally extending microwave cavity (2) is defined at the ends by microwave traps (20, 22), the positions of which are automatically adjustable to provide dynamic tuning. An adjustable antenna is provided, and operation utilizes the TM012 mode.
Abstract:
A method and apparatus for efficiently depositing a dielectric film with a preselected thickness pattern, in particular a homogeneous, uniform diamond or diamond-like film on large area substrates through the use of opposing plasma torches (23) and linearly superimposing of microwave modes within the reaction chamber (26) creating and maintaining an extended linear plasma in close proximity to the substrate surfaces and utilizing laminar flow of the reactant gases in the plasma and over the surfaces. Substrate surfaces can be moved past the opposing torches (23) permitting the coating of large area, rectangularly-shaped substrate surfaces in a simple manner. Alternatively, the plasma horn or horns (23) can be moved across the substrate permitting coating of large area, rectangularly-shaped substrate surfaces.
Abstract:
A microwave plasma reactor for manufacturing synthetic diamond material via chemical vapour deposition, the microwave plasma reactor comprising: a plasma chamber defining a resonant cavity for supporting a primary microwave resonance mode having a primary microwave resonance mode frequency f; a plurality of microwave sources coupled to the plasma chamber for generating and feeding microwaves having a total microwave power Ρτ into the plasma chamber; a gas flow system for feeding process gases into the plasma chamber and removing them therefrom; and a substrate holder disposed in the plasma chamber and comprising a supporting surface for supporting a substrate on which the synthetic diamond material is to be deposited in use, wherein the plurality of microwave sources are configured to couple at least 30% of the total microwave power Ρτ into the plasma chamber in the primary microwave resonance mode frequency f, and wherein at least some of the plurality of microwave sources are solid state microwave sources.
Abstract:
A microwave plasma reactor for manufacturing synthetic diamond material via chemical vapour deposition, the microwave plasma reactor comprising: a microwave generator configured to generate microwaves at a frequency f; a plasma chamber comprising a base, a top plate, and a side wall extending from said base to said top plate defining a resonance cavity for supporting a microwave resonance mode, wherein the resonance cavity has a central rotational axis of symmetry extending from the base to the top plate, and wherein the top plate is mounted across said central rotational axis of symmetry; a microwave coupling configuration for feeding microwaves from the microwave generator into the plasma chamber; a gas flow system for feeding process gases into the plasma chamber and removing them therefrom; and a substrate holder disposed in the plasma chamber and comprising a supporting surface for supporting a substrate on which the synthetic diamond material is to be deposited in use; wherein the resonance cavity is configured to have a height, as measured from the base to the top plate of the plasma chamber, which supports a TM 011 resonant mode between the base and the top plate at said frequency f, and wherein the resonance cavity is further configured to have a diameter, as measured at a height less than 50% of the height of the resonance cavity as measured from the base, which satisfies the condition that a ratio of the resonance cavity height / the resonance cavity diameter is in the range 0.3 to 1.0.
Abstract:
A microwave plasma reactor for manufacturing synthetic diamond material via chemical vapour deposition, the microwave plasma reactor comprising: a microwave generator configured to generate microwaves at a frequency f; a plasma chamber comprising a base, a top plate, and a side wall extending from said base to said top plate defining a resonance cavity for supporting a microwave resonance mode between the base and the top plate; a microwave coupling configuration for feeding microwaves from the microwave generator into the plasma chamber; a gas flow system for feeding process gases into the plasma chamber and removing them therefrom; a substrate holder disposed in the plasma chamber and comprising a supporting surface for supporting a substrate; and a substrate disposed on the supporting surface,the substrate having a growth surface on which the synthetic diamond material is to be deposited in use, wherein the substrate dimensions and location within the resonance cavity are selected to generate a localized axisymmetric Ez electric field profile across the growth surface in use, the localized axisymmetric Ez electric field profile comprising a substantially flat central portion bound by a ring of higher electric field, the substantially flat central portion extending over at least 60% of an area of the growth surface of the substrate and having an Ez electric field variation of no more than ±10% of a central Ez electric field strength, the ring of higher electric field being disposed around the central portion and having a peak Ez electric field strength in a range 10% to 50% higher than the central Ez electric field strength.
Abstract:
A plasma treating device which can generate uniform plasma over a wide area and can perform plasma treatment on a substrate (wafer W) to be treated with high in-plane uniformity. A transmissive window (23) for transmitting microwaves is provided in the ceiling section of a vacuum vessel (2) provided with a plasma chamber (21) and a film forming chamber (22) and a waveguide (4) for supplying microwaves of 2.45 GHz in frequency to the vacuum vessel (2) in a TM mode is provided on the window (23). The waveguide (4) is composed of a rectangular waveguide (41), a cylindrical waveguide (42) which works as a TM mode converter (42), and a conical waveguide (43) and the exit side of the waveguide (43) is connected to the upper surface of the window (23). When the microwaves are transmitted into the vessel (2) in the TM mode and, at the same time, a magnetic field is formed in the vessel (2) and the exit-side inside diameter OA of the waveguide (43) is adjusted to 130-160 mm, the density of plasma in the plasma chamber (1) becomes uniform and plasma treatment can be performed on a wafer W having a size of, for example, 8 inches with high in-plane uniformity.