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7615202 Method for producing high purity silicon  
An object of the invention is to provide a method for producing a large amount of inexpensive high purity silicon useful for a solar battery. Disclosed is a method for producing high purity silicon...
7569716 Method of selecting silicon having improved performance  
Chemical grade silicon metalloid having improved performance in the direct process for making organohalosilanes is selected by (A) measuring the temperature of each batch of silicon metalloid...
7560085 Porous silicon particles  
Porous silicon particles are prepared from a metallurgical grade silicon powder having an initial particle size greater than about 1 micron is presented. Each porous silicon particle comprises a...
7553468 Method for producing solid product  
Provided is a production method for producing a solid product by a reaction of gaseous raw materials with a plurality of components including a step of conducting the reaction using a reactor...
7553467 Tubular reaction vessel and process for producing silicon therewith  
There is provided a reaction vessel whereby silicon produced can be smoothly recovered dropwise without excessive thermal load on constitutional parts of the reaction vessel, a silicon deposition...
7553466 Method for producing highly pure, granular silicon in a fluidised bed  
The present invention relates to a method for producing highly pure, granular silicon with a narrow particle-size distribution by decomposing silanes or halosilanes in a fluidised bed and...
7538044 Process for producing high-purity silicon and apparatus  
When high purity silicon is produced through a gas-phase reaction between silicon tetra-chloride and zinc in a reaction furnace, the produce silicon is obtained as block or molten state. after the...
7531155 Method of producing silicon nanoparticles from stain-etched silicon powder  
The present invention is for a porous silicon powder comprising silicon particles wherein the outermost layers of said particles are porous. The present invention is also directed to a method of...
7455822 Method for production of silicon  
A process for production of Si, characterized by adding an oxide, hydroxide, carbonate or fluoride of an alkali metal element, or an oxide, hydroxide, carbonate or fluoride of an alkaline earth...
7429369 Silicon nanoparticle nanotubes and method for making the same  
A relatively thick electrode is positioned opposite the surface of a substrate/second electrode. The electrode and the substrate surface are both contacted by a solution including silicon...
7404941 Medium purity metallurgical silicon and method for preparing same  
The invention concerns a method for producing a medium purity silicon comprising: preparing, by carbothermic reduction of silica in a submerged arc-furnace a silicon with low boron content;...
7361592 Method for producing a component comprising at least one germanium-based element and component obtained by such a method  
The method successively comprises production, on a substrate, of a stack of layers comprising at least one first layer made from germanium and silicon compound initially having a germanium...
7294324 Low basal plane dislocation bulk grown SiC wafers  
A high quality single crystal wafer of SiC is disclosed. The wafer has a diameter of at least about 3 inches (75 mm) and at least one continuous square inch (6.25 cm 2 ) of surface area that has a...
7074880 Polyimide aerogels, carbon aerogels, and metal carbide aerogels and methods of making same  
A preparation process of polyimide aerogels that composed of aromatic dianhydrides and aromatic diamines or a combined aromatic and aliphatic diamines is described. Also descried is a process to...
7060240 Sol-gel process for the manufacture of nanocomposite photoluminescent materials and materials thus produced  
It is described a process based on sol-gel chemistry suitable to the production of nanocomposite materials being photoluminescent at ambient temperature, comprising silicon grains of dimension of...
7056484 Method for producing trichlorosilane  
The invention relates to a method for producing trichlorosilane by reacting silicon with hydrogen, silicon tetrachloride and, optionally, hydrogen chloride, whereby the silicon is provided in...
7033561 Process for preparation of polycrystalline silicon  
A process for preparing polycrystalline silicon comprising the steps of (A) reacting trichlorosilane with hydrogen thereby forming silicon and an effluent mixture comprising tetrachlorosilane and...
7001579 Method for producing highly purified, granular silicium  
The invention relates to a method for producing granular silicon by thermal decomposition of a gas containing silicon in a fluidized bed, said decomposition occurring in the presence of...
6953559 Method for producing highly pure, granular silicon  
The invention relates to a method for producing highly pure, granular silicon by decomposing a gas containing silicon in a procedure comprising at least two operating states, at least one state...
6932954 Method for producing silicon  
A silicon production process which improves the production efficiency of trichlorosilane while an industrially advantageous output is ensured and the amount of the by-produced tetrachlorosilane is...
6926876 Plasma production of polycrystalline silicon  
The invention is directed to a method of producing polycrystaline silicon metal from a silicon halide plasma source. The silicon halide is split into silicon and halide ions in an inductively...
6887448 Method for production of high purity silicon  
The invention relates to a method for the production of high purity silicon, characterized by the following steps: a) reaction of metallic silicon with silicon tetrachloride (SiCl 4 ), hydrogen (H...
6852300 Process for preparing silica or silica-based thick vitreous films according to the sol-gel technique and thick films thereby obtained  
A sol-gel process allowing preparation, on a substrate, of glassy films of silicon oxide or mixed oxides based on silicon oxide, of thickness above 1 micrometer, generally between 2 and 20...
6849244 Method for producing highly-pure granular silicon  
The invention relates to a method for producing hyper-pure, granular silicon by decomposing a gas containing silicon in a reactor consisting of a silicon carbide-based, carbon-fiber reinforced...
6797250 Single-crystal optical element having flat light-transmitting end surface inclined relative to cleavage plane  
In an optical element which includes a single crystal having at least one flat light-transmitting end surface, the at least one light-transmitting end surface is inclined at at least 0.5 degrees...
6749824 Chemical vapor deposition system for polycrystalline silicon rod production  
Disclosed are processes and reactor apparatus for rapidly producing large diameter, high-purity polycrystalline silicon rods for semiconductor applications. A.C. current, having a fixed or variable...
6676916 Method for inducing controlled cleavage of polycrystalline silicon rod  
To avoid problems associated with the formation of unwanted cracks and spalls during the growth of a polycrystalline silicon rod, a flaw is induced in a filament on which silicon will be deposited...
6670036 Silicon seed crystal and method for producing silicon single crystal  
There are disclosed a silicon seed crystal which is composed of silicon single crystal and used for the Czochralski method, wherein oxygen concentration in the seed crystal is 15 ppma (JEIDA) or...
6632413 Method for purifying silicon  
A method of purifying silicon, comprising feeding a sparging gas into a liquid melt [ 10 ] containing molten silicon and at least one impurity, in which the sparging gas is used to react with or...
6623801 Method of producing high-purity polycrystalline silicon  
In producing rod-form high-purity polycrystalline silicon by depositing silicon on a silicon core by the thermal decomposition of a silane gas, the occurrence of defects near the interface of the...
6503563 Method of producing polycrystalline silicon for semiconductors from saline gas  
A rod-form high-purity polycrystalline silicon capable of preventing defects from occurring to a newly deposited silicon layer. To this end, a method of producing a rod-form high-purity...
6451277 Method of improving the efficiency of a silicon purification process  
Methods for Heating a Fluidized Bed Silicon Deposition Apparatus with the steps of: one or more heaters and entries to the reactor for the gas or gases which can be heated without decomposition...
6423286 Method of making silicon clathrates  
A method of preparing a substantially homogenous, alkali-metal silicon clathrate composition containing the silicon clathrate M x Si 136 (3≦x≦24). The silicon clathrate is prepared by rapidly...
6395249 Production process and apparatus for high purity silicon  
It is possible to produce high purity Si by heating solid SiO at a temperature of at least 1000° C. and lower than 1730° C., for a disproportionation reaction in which the SiO solid is decomposed...
6395248 Process for preparing polysilicon using exothermic reaction  
The disclosure describes a process for the production of polycrystalline silicon by a thermal decomposition or hydrogen reduction of a reaction gas consisting of silane gas, which comprises...
6365225 Cold wall reactor and method for chemical vapor deposition of bulk polysilicon  
A method and apparatus, and product by process, for the production of bulk polysilicon by a chemical vapor deposition process on a removable tube section. A quartz envelope and base plate form a...
6284312 Method and apparatus for chemical vapor deposition of polysilicon  
A method and apparatus, and product by process, for the production of bulk polysilicon by broad area chemical vapor deposition, consisting of a quartz envelope and base plate forming a reactor...
6281098 Process for Polycrystalline film silicon growth  
A process for depositing polycrystalline silicon on substrates, including foreign substrates, occurs in a chamber at about atmospheric pressure, wherein a temperature gradient is formed, and both...
6248004 Multiphase nucleation reactor injector for hydroblast cleaning of surfaces  
This invention is related to the cleaning of surfaces using the hydroblasting technique, where the surface to be cleaned is exposed to a cleaning fluid mixture of liquid and abrasives which is...
RE36936 Production of high-purity polycrystalline silicon rod for semiconductor applications  
Disclosed are a processes and reactors for rapidly producing large diameter, high-purity polycrystalline silicon rods for semiconductor applications by the deposition of silicon from a gas...
6060021 Method of storing trichlorosilane and silicon tetrachloride  
Trichlorosilane for producing polycrystal silicon and tetrachlorosilane for producing trichlorosilane are storaged under hydrogen gas as a sealing gas. High-purity polycrystal silicon is provided.
6036932 Method for purification of silicon  
Disclosed is an efficient and inexpensive method for the purification of low-grade silicon such as metallurgical-grade metallic silicon to give solar cell-grade silicon. The method comprises: (a)...
6013872 Directionally solidified, multicrystalline silicon, a process for the production thereof and its use, and solar cells containing this silicon and a process for the production thereof  
The present invention relates to directionally solidified, arsenic- and/or antimony-containing, multicrystalline silicon, a process for the production thereof and its use, and to solar cells...
5976481 Polycrystal silicon rod and production process therefor  
A polycrystal silicon rod characterized in that it has a half value width of a peak indicative of crystal orientation (111) of an X-ray diffraction pattern, of 0.3° or less, an internal strain...
5961944 Process and apparatus for manufacturing polycrystalline silicon, and process for manufacturing silicon wafer for solar cell  
An object of the present invention is to provide a process and apparatus for the continuous flow production of polycrystalline silicon from metallic silicon or silicon oxide as a raw material and...
5910295 Closed loop process for producing polycrystalline silicon and fumed silica  
A closed loop process for producing electronic grade polycrystalline silicon from silane and fume silica from silicon tetrachloride comprises the steps of: (a) subjecting impure silicon to...
5904981 Polycrystal silicon rod having an improved morphyology  
A cylindrical polycrystal silicon rod formed of a high-purity polycrystal silicon, characterized in that a crystal having a grain diameter smaller than that of a crystal at a location where the...
5900450 Three-dimensionally connected silica sphere-resin composite and method for production thereof  
A method for preparing a three dimensionally connected silica spheres-resin composite, which comprises hydrolyzing and polymerizing a low molecular weight polyalkoxysilane in the presence of an...
5810934 Silicon deposition reactor apparatus  
Silicon beads are produced by chemical vapor deposition (CVD) on seed particles generated internal to a CVD reactor. The reactor has multiple zones, including an inlet zone where beads are...
5798137 Method for silicon deposition  
Silicon beads are produced by chemical vapor deposition (CVD) on seed particles generated internal to a CVD reactor. The reactor has multiple zones, including an inlet zone where beads are...
Matches 1 - 50 out of 235 1 2 3 4 5 >