Abstract:
A method and apparatus that may be utilized for chemical vapor deposition and/or hydride vapor phase epitaxial (HVPE) deposition are provided. In one embodiment, a metal organic chemical vapor deposition (MOCVD) process is used to deposit a Group III-nitride film on a plurality of substrates. A Group III precursor, such as trimethyl gallium, trimethyl aluminum or trimethyl indium and a nitrogen-containing precursor, such as ammonia, are delivered to a plurality of straight channels which isolate the precursor gases. The precursor gases are injected into mixing channels where the gases are mixed before entering a processing volume containing the substrates. Heat exchanging channels are provided for temperature control of the mixing channels to prevent undesirable condensation and reaction of the precursors.
Abstract:
According to the invention, upstream of the injection means, the combustible propellant and the oxidant propellant are mixed at constant pressure; and to inject the said mixture of propellants at constant pressure into the combustion chamber (1), injection means (7 to 11) are chosen, making it possible to vary the flow rate of the said injected mixture.
Abstract:
Selon l'invention; en amont des moyens d'injection, on réalise le mélange à pression constante de l'ergol combustible et de l'ergol comburant; et pour injecter ledit mélange d'ergols à pression constante dans la chambre de combustion (1 ), on choisit des moyens d'injection (7 à 1 1 ), permettant de faire varier le débit dudit mélange injecté.
Abstract:
The invention is a process and device for exchanging heat energy between three or more streams in a microchannel heat exchanger which can be integrated with a microchannel reactor to form an integrated microchannel processing unit. The invention enables the combining of a plurality of integrated microchannel devices to provide the benefits of large-scale operation. In particular, the microchannel heat exchanger of the present invention enables flexible heat transfer between multiple streams and total heat transfer rates of about 1 Watt or more per core unit volume expressed as W/cc.
Abstract:
A tank (15) for holding a liquid for a predetermined time in a continous flow process. The tank includes an inner compartment (40) with an inlet (16) and an outer compartment (20) with an outlet (18). The outer compartment encloses the inner compartmemt except its inlet. The liquid enters through the inlet and is forced upwardly in a non-preferential flow. The liquid overflows out of the inner compartment into the outer compartment and exits through the outlet. A pump (90) is connected to the outlet and a variable throttle valve (80) is connected to output of the pump. A level sensor (60-63) for the liquid is connected to a computerized control unit (70) to monitor the liquid level and to activate the throttle valve to either increase or decrease output flow, and thus adjusting the liquid level.
Abstract:
Imaging apparatus including an electrostatic imaging surface (10), latent image forming (16) apparatus for forming an electrostatic latent image on said electrostatic imaging surface (10) and development apparatus (22) for developing said electrostatic latent image which includes supply apparatus (20) for supplying a liquid toner to the image forming surface (10), the supply apparatus (20) including a multiplicity of independently controllable outlets (106), preferably spray outlets, and a development surface (38) for developing the electrostatic latent image using the liquid toner. The supply apparatus (20) is preferably a multi-color supply apparatus and the multiplicity of outlets (106) includes a plurality of the individually controllable outlets, for supplying liquid toner of each of a plurality of colors.