Abstract:
The present invention relates to molecr beam epitaxy, in particular, to a gas source molecular beam epitaxy apparatus using compound gases as sources of semiconductor component elements, and also relates to a method for growing semiconductor crystal using this apparatus. It is an object of the present invention to prevent an epitaxial layer from being contaminated with organic compounds produced by decomposition of source gases. It is another object to grow a high purity semiconductor crystal at a growth rate high enough for practical applications. To achieve the above objects, in a growth apparatus in accordance with the present invention, the ambient gas pressure is maintained at the order of 10.sup.-5 -10.sup.-3 Torr during a growing process. The distance between a substrate on which semiconductor is to be grown and a gas effusion cell made shorter than the mean free path of source gases and by-products produced by decomposition of the source gases, wherein the mean free path is determined from the above ambient gas pressure. Moreover, a heat insulation plate is provided between the gas effusion cell and the substrate, wherein the heat insulation plate has apertures corresponding to gas effusion cells. Furthermore, as source gases, amino compounds are used such as trimethyl amine galane ((CH.sub.3).sub.3 N.multidot.GaH.sub.3), triethyl amine alane ((C.sub.2 H.sub.5).sub.3 N), tris-dimethylamino arsine (As(N(CH.sub.3).sub.2).sub.3), trimethyl amine ilane ((CH.sub.3).sub.3 N.multidot.InH.sub.3), and tris-diethylamino phosphine (P(N(C.sub.2 H.sub.5).sub.2).sub.3), wherein the amino compounds include elements composing compound semiconductor such as GaAs and InP.
Abstract translation:本发明涉及分子束外延,特别涉及使用复合气体作为半导体元件元件的源的气体源分子束外延装置,还涉及使用该装置生长半导体晶体的方法。 本发明的目的是防止外延层被源气体分解产生的有机化合物污染。 另一个目的是以实际应用足够高的生长速度生长高纯度半导体晶体。 为了实现上述目的,在根据本发明的生长装置中,环境气体压力在生长过程中维持在10-5-10-3乇的数量级。 在其上生长半导体的基板与比原始气体的平均自由程和源气体分解产生的副产物短的气体注入单元之间的距离,其中平均自由程是根据上述环境 气压。 此外,在气体注入单元和基板之间设置绝热板,其中隔热板具有对应于气体积聚单元的孔。 此外,作为源气体,使用氨基化合物,例如三甲基胺加仑((CH 3)3 N x GaH 3),三乙胺烷((C 2 H 5)3 N),三 - 二甲基氨基胂(As(N(CH 3)2)3),三甲胺 ((CH 3)3 N x InH 3)和三 - 二乙基氨基膦(P(N(C 2 H 5)2)3),其中氨基化合物包括构成化合物半导体如GaAs和InP的元素。
Abstract:
A plasma treatment apparatus comprising a chamber earthed, a vacuum pump for exhausting the chamber, a suscepter on which a wafer is mounted, a shower electrode arranged in the chamber, opposing to the suscepter, a unit for supplying plasma generating gas to the wafer on the suscepter through the shower electrode, a first radio frequency power source for adding radio frequency voltage, which has a first frequency f.sub.1, to both of the suscepter and the shower electrode, a second radio frequency power source for adding radio frequency voltage, which has a second frequency f.sub.2 higher than the first frequency f.sub.1, at least to one of the suscepter and the shower electrode, a transformer whose primary side is connected to the first radio frequency power source and whose secondary side to first and second electrodes, and a low pass filter arranged in a circuit on the secondary side of the transformer, and serving to allow radio frequency voltage, which has the first frequency f.sub.1, to pass through it but to cut off radio frequency voltage, which has the second frequency f.sub.2, while plasma is being generated.
Abstract:
A CVD reactor includes separate reaction and pressure chambers, where the reaction chamber is contained within and isolates reactant gases from the pressure chamber. The reactor also includes a gas injection system which injects process gas(es) into the reaction chamber in a somewhat vertical direction through a bottom surface of the reaction chamber. The gas injection system injects hydrogen or other appropriate gas in a vertical direction through the bottom surface of the reaction chamber. The flow of hydrogen or other appropriate gas is intermediate the flow of the process gas(es) and a surface of the reaction chamber, thereby re-directing the process gas flow parallel to the top surface of a wafer therein. In this manner, the reaction chamber does not require a long entry length for the process gas(es). This flow of hydrogen or other suitable gas also minimizes undesirable deposition on the surface of the reaction chamber.
Abstract:
Gold or copper is grown on a substrate by a chemical vapor deposition method using a .beta.-ketonato type metal complex of gold or copper as a starting material and introducing the starting material to the substrate using as a carrier gas a mixed gas composed of hydrogen and a substance which can bond to the starting material in a state where electron is donated from the substance to the starting material to form a molecular compound.
Abstract:
The present invention relates to molecr beam epitaxy, in particular, to a gas source molecular beam epitaxy apparatus using compound gases as sources of semiconductor component elements, and also relates to a method for growing semiconductor crystal using this apparatus. It is an object of the present invention to prevent an epitaxial layer from being contaminated with organic compounds produced by decomposition of source gases. It is another object to grow a high purity semiconductor crystal at a growth rate high enough for practical applications. To achieve the above objects, in a growth apparatus in accordance with the present invention, the ambient gas pressure is maintained at the order of 10.sup.-5 -10.sup.-3 Torr during a growing process. The distance between a substrate on which semiconductor is to be grown and a gas effusion cell made shorter than the mean free path of source gases and by-products produced by decomposition of the source gases, wherein the mean free path is determined from the above ambient gas pressure. Moreover, a heat insulation plate is provided between the gas effusion cell and the substrate, wherein the heat insulation plate has apertures corresponding to gas effusion cells. Furthermore, as source gases, amino compounds are used such as trimethyl amine galane ((CH.sub.3).sub.3 N.GaH.sub.3), triethyl amine alane ((C.sub.2 H.sub.5).sub.3 N) , tris-dimethylamino arsine (As (N (CH.sub.3).sub.2).sub.3) , trimethyl amine ilane ((CH.sub.3).sub.3 N.InH.sub.3), and tris-diethylamino phosphine (P (N (C.sub.2 H.sub.5).sub.2).sub.3) , wherein the amino compounds include elements composing compound semiconductor such as GaAs and InP.
Abstract:
A programmable multizone fluids injector for use in single-wafer semiconductor processing equipment including an injector having a plurality of orifices therein which are divided into a number of separate zones or areas. These zones or areas are connected by means of appropriate passageways and conduits to a source of process fluids. Each of the separate conduits has at least one flow control device located therein for independently controlling the amounts and ratios of process fluids flowing into each zone. The fluid control devices are responsive to input signals so that the fluid flow rates from the orifices can maintain a desired flow pattern within the process chamber to suit the individual needs of a particular fabrication processs.
Abstract:
An actively cooled effuser for a vapor deposition reactor is placed in very close proximity to a substrate. The actively cooled effuser has combinations of gas directing plates, cooling plates and isolation plates attached together. Reactants and coolant are input into the stack of plates so formed. Selective heating of the substrate surface may occur through the use of heating lamps. Multiple units of the actively cooled effuser and heating lamps may be used in the reactor to form multiple layers on the substrate. The cooling plate has a cooling channel within a few thousandths of an inch of the output side of the stack. The presence of the cooling plates allows the effuser to be placed in very close proximity to the selectively heated substrate.
Abstract:
Method of depositing microcrystalline solid bodies from the gas phase by means of Chemical Vapor Deposition (CVD) in which the solid particles are deposited on a substrate heated to a temperature ranging between 450.degree. and 1200.degree. C. at a pressure ranging between 10.sup.-5 and 1 bar and at a directed gas flow, in which method the reactant gas is passed through a porous intermediate body having a thickness of between 2 and 30 mm of a material suitable for use at temperatures up to 2500.degree. C., which intermediate body is present in the zone having the maximum energy content within the reactor, while the reactant gas is excited in said intermediate body, whereafter the solid particles are deposited on the substrate.
Abstract:
In some embodiments, a showerhead assembly includes a heated showerhead having a heater plate and a gas distribution plate coupled together; an ion filter spaced from the heated showerhead; a spacer ring in contact between the heated showerhead and the ion filter; a remote plasma region between the heated showerhead and the ion filter; an upper isolator spaced from the spacer ring and supported on the ion filter; a sealing ring fastened to the heated showerhead sealing against the upper isolator and pushing the upper isolator against the ion filter; a gap between a bottom of the gas distribution plate and a top of the ion filter, the gap being in fluid communication with the remote plasma region; a first passage extending through the heater plate; and a second passage in communication with the first passage and extending through the gas distribution plate, the second passage extending to the gap.
Abstract:
The present disclosure relates to a showerhead assembly and a substrate processing apparatus, and more particularly to a showerhead assembly and a substrate processing apparatus including a ceramic heater that heats a substrate and by which hole processing is freely performed in a relatively high temperature process.