Abstract:
A high-frequency heating device including: a solid-state oscillator that generates a microwave; an amplifier that amplifies the microwave generated by the solid-state oscillator; an isolator that is connected to a stage subsequent to the amplifier, and blocks a reflected wave directed from an object exposed with the microwave; an antenna that irradiates the microwave toward the object; and a metal cavity that traps therein the microwave irradiated to the object.
Abstract:
A method of forming a metal oxide film by the plasma CVD method and comprising reacting chiefly an organometal by a glow discharge in a low output region and, then, reacting the organometal with an oxidizing gas by the glow discharge in a high-output region to form a metal oxide film on the surface of a plastic substrate via an organic layer. This method forms a thin film having excellent adhesiveness, softness and flexibility on the surface of a plastic substrate relying on the plasma CVD method.
Abstract:
A system and method are described for depositing a material onto a receiving surface, where the material is formed by use of a plasma to modify a source material in-transit to the receiving surface. The system comprises a microwave generator electronics stage. The system further includes a microwave applicator stage including a cavity resonator structure. The cavity resonator structure includes an outer conductor, an inner conductor, and a resonator cavity interposed between the outer conductor and the inner conductor. The system also includes a multi-component flow assembly including a laminar flow nozzle providing a shield gas, a zonal flow nozzle providing a functional process gas, and a source material flow nozzle configured to deliver the source material. The source material flow nozzle and zonal flow nozzle facilitate a reaction between the source material and the functional process gas within a plasma region.
Abstract:
Selon l'invention, il est proposé un générateur d'un plasma dans une enceinte sous vide comprenant au moins un générateur élémentaire débouchant dans l'enceinte, le générateur élémentaire comprenant : - un générateur de micro-ondes, - un adaptateur d'impédance s'étendant selon une direction coaxiale, l'adaptateur étant configuré pour adapter l'impédance du plasma à l'impédance du générateur de micro-ondes et pour assurer la protection du générateur de micro-ondes, le générateur de micro-ondes étant situé dans le prolongement de l'adaptateur et connecté directement à l'adaptateur.
Abstract:
It is possible to increase the service life of a magnetron. There is provided a magnetron service life judgment method. A microwave generation device includes: a magnetron (74) having a cathode (80) containing a filament (78) and an anode (82) containing a hollow resonator (84) arranged to oppose to each other; a filament current measuring unit (100); and an application voltage measuring unit (102) for measuring voltage applied to the filament. According to the current and the voltage obtained by the current measuring unit (100) and the voltage measuring unit (102), a resistance value calculation unit (104) obtains a resistance value of the filament. A temperature calculating unit (106) calculates the filament temperature from the resistance value according to the resistance-temperature dependent characteristic. A filament power source (98) is controlled by a power control unit (110) so that the filament temperature is within a predetermined temperature range. Moreover, the voltage applied to the filament is successively lowered and the voltage applied to the filament when the moding phenomenon occurs is obtained as the moding voltage and the magnetron service life is judged according to the moding voltage.
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 plasma generator ignites and sustains a uniform and linear plasma near atmospheric pressure. The plasma generator is composed of two power supplies, a power divider, an array of transmission line tapers and an ignition resonator. One microwave power supply is used to drive the taper array and the other power supply drives the ignition resonator. The power divider splits the taper array power evenly and delivers it to each taper. A plasma is ignited by the ignition resonator and then the plasma propagates to the taper array. The taper array does not start a plasma by itself and the ignition resonator is provided to do so. Increasing the number of tapers increases the length of the plasma.