Matches 101 - 150 out of 243 < 1 2 3 4 5 >
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4837376 Process for refining silicon and silicon purified thereby  
Highly pure silicon is produced by refining impure silicon to remove deleterious impurities by contacting a melt of the impure silicon with a reacitve gas which comprises a gaseous halogen compound...
4831964 Production of shaped articles of ultra-pure silicon  
Shaped articles, e.g., bars, of semiconductor-grade, ultra-pure silicon, are facilely and efficiently produced by thermally decomposing/pyrolyzing a monosilane feedstream on a red-heated silicon...
4828814 Process for purification of solid material  
A process is disclosed for producing a solid material which, in some cases, may have a resultant purity of 99.999% or better which comprises contacting the solid material at a temperature...
4826668 Process for the production of ultra high purity polycrystalline silicon  
The present invention is directed to an improved process for producing ultra high purity polycrystalline silicon which process provides for increased production capacity and electrical power...
4820587 Polysilicon produced by a fluid bed process  
Silicon of high purity is made by decomposing silane in a fluidized bed reactor. To obtain good process economics, two modes of operation are used. In a first mode, the reactor is operated under...
4784840 Polysilicon fluid bed process and product  
Silicon of high purity is used in making semiconductor devices. Silicon for this purpose is made by decomposing silane in a fluidized bed reactor. This process entails thermal decomposition of...
4756896 Method of preparing silicon  
The invention relates to a method for preparing polycrystalline pure silicon by reducing gaseous silicon tetrafluoride at a raised temperature by means of alkali metal or alkali earth and by...
4751067 Process for making silicon from halosilanes and halosilicons  
A reactor apparatus (10) adapted for continuously producing molten, solar grade purity elemental silicon by thermal reaction of a suitable precursor gas, such as silane (SiH 4 ), is disclosed. The...
4751192 Process for the preparation of image-reading photosensor  
An improved image-reading photosensor having a desired photoelectric conversion layer prepared in the absence of a plasma by the reaction of a substance capable of contributing to form a deposited...
4748052 Fluid bed reactor and process  
Undesirable conversion of a silicon source, such as silane, in the freeboard above a fluidized bed of silicon particles in a fluidized bed reactor, can be reduced by cooling the gas within the...
4724160 Process for the production of semiconductor materials  
An improvement in a process for the production of semiconductor materials from the vapor decomposition of a precursor compound of the desired semiconductor material and the deposition of the...
4710260 Deposition of silicon at temperatures above its melting point  
Liquid silicon is deposited on a high surface area column of silicon nitride particles, by hydrogen decomposition of trichlorosilane. This is accomplished in an environment heated to a temperature...
4684513 Zone heating for fluidized bed silane pyrolysis  
An improved heated fluidized bed reactor and method for the production of high purity polycrystalline silicon by silane pyrolysis wherein silicon seed particles are heated in an upper heating zone...
4683125 Method for purifying an industrial raw material gas and a purifier for use in said method and a method of manufacturing said purifier  
The invention relates to a purifier for purifying an industrial raw material gas, formed by depositing a hydrogenated or a fluorinated amorphous substance of an element selected from a group...
4681652 Manufacture of polycrystalline silicon  
Process of growing polysilicon on a plurality of deposition members grouped in a double ring, i.e., an outer circle surrounding an inner circle of members.
4676968 Melt consolidation of silicon powder  
A process is disclosed for the melt consolidation of silicon powder which is based on the use of a critical partial vacuum of 200-300 torr of an inert gas that is applied.
4676967 High purity silane and silicon production  
Silicon tetrachloride, hydrogen and metallurgical silicon are reacted at about 400°-600° C. and at pressures in excess of 100 psi, and specifically from about 300 up to about 600 psi to form di-...
4668493 Process for making silicon  
A reactor apparatus (10) adapted for continuously producing molten, solar grade purity elemental silicon by thermal reaction of a suitable precursor gas, such as silane (SiH 4 ), is disclosed. The...
4661335 Novel silicon powder having high purity and density and method of making same  
A powder of elemental silicon having high purity and a density in excess of about 0.6 g/cm 3 , preferably ranging from 0.8 to 1.2 g/cm 3 , and which is non-amorphous as determined by X-ray...
4656021 Method for the production of silicon  
A method for producing silicon which comprises subjecting silane and chlorine to a combustion reaction to generate a flame and thereby precipitating fine crystals of silicon.
4642227 Reactor for producing large particles of materials from gases  
A method and apparatus is disclosed for producing large particles of material from gas, or gases, containing the material (e.g., silicon from silane) in a free-space reactor comprised of a tube...
4642228 Fluxing system for reactors for production of silicon  
A process is disclosed for the production of elemental silicon that utilizes a non-reactive condensible gas as a means for purging the reactor of ambient air prior to the introduction of an alkali...
4590024 Silicon deposition process  
An improved process is disclosed for the deposition in a reactor vessel of silicon on the interior walls of the reactor vessel and for the subsequent separation of the silicon from those walls. The...
4569855 Method of forming deposition film  
A process for forming a deposition film, wherein a gaseous atmosphere of a silicon compound selected from (i) a silicon compound having at least one azo group directly bonded to a silicon atom...
4559219 Reducing powder formation in the production of high-purity silicon  
A method of manipulating the rate of homogeneous nucleation of silicon as either a particulate solid or liquid settling out of the gaseous phase during the pyrolysis of silane homologs by...
4537759 Production of elemental silicon from impure silane feed  
Elemental silicon is produced by a process and apparatus wherein relatively impure silane (SiH 4 ) is purified in the gaseous state, while mixed with an inert carrier gas, to a content of...
4529576 Process and apparatus for obtaining silicon from fluosilicic acid  
Process for producing low cost, high purity solar grade Si wherein a reduction reaction, preferably the reduction of SiF 4 , by an alkali metal (liquid Na preferred) is carried out essentialy...
4525334 Process for the production of silicon  
A process for the production of silicon comprising reacting a gaseous silicon compound of the formula SiH n X 4 -n, wherein X is halogen and n is 0 to 3, with aluminum in solid state. The...
4519999 Waste treatment in silicon production operations  
A battery of special burners, each adapted for the treatment of a particular range of waste material formed during the conversion of metallurgical grade silicon to high purity silane and silicon,...
4481232 Method and apparatus for producing high purity silicon  
A method for producing high purity silicon includes forming a copper silie alloy and positioning the alloy within an enclosure. A filament member is also placed within the enclosure opposite the...
4460556 Method for producing high purity Si for solar cells  
Highly purified starting materials for the production of silicon suitable for fabrication of solar cells are produced via the carbo-thermal reduction process. A carbon-containing material with...
4459163 Amorphous semiconductor method  
Preparation of amorphous semiconductor material that is suitable for use in a wide variety of devices by the pyrolytic decomposition of one or more gaseous phase polysemiconductanes, including...
4457902 High efficiency hydrocarbon reduction of silica  
A process to reduce SiO 2 to produce Si, includes the steps: (a) reacting SiO 2 with a saturated hydrocarbon at elevated temperature in a retort, to produce molten Si, and gases including SiO,...
4454104 Process for working up the residual gases obtained in the deposition of silicon and in the conversion of silicon tetrachloride  
The chlorosilanes contained in the residual gases obtained in the deposit of silicon and in the conversion of silicon tetrachloride are first condensed out in liquid form. The hydrogen chloride...
4444811 Fluidized bed silicon deposition from silane  
A process and apparatus for thermally decomposing silicon containing gas for deposition on fluidized nucleating silicon seed particles is disclosed. Silicon seed particles are produced in a...
4444812 Combination gas curtains for continuous chemical vapor deposition production of silicon bodies  
A process for producing electronic-grade silicon bodies is disclosed wherein continuously-pulled slim rods which can be formed in situ from the reaction of a seed crystal and a molten silicon...
4424199 Fluid jet seed particle generator for silane pyrolysis reactor  
Method is provided for generating fine sized seed particles of silicon for use in the fluidized bed pyrolysis of silane.
4416913 Ascending differential silicon harvesting means and method  
An improved means and method for extracting polycrystalline silicon from silicon source gases is provided wherein seed particles and source gases are reacted in a rising particle reaction chamber...
4406765 Apparatus and process for production of amorphous semiconductor  
A process for producing an amorphous semiconductor membrane. A predetermined gas is introduced into a vacuum chamber which is decomposed by a discharge phenomenon. The discharge phenomenon is...
4389493 Process for the production of silicon-containing and carbon-containing raw material moldings, and the use of such moldings  
In the production of silicon or silicon-alloy bodies in which a shaped pre-form, blank or like member containing a silicon carrier and carbon is subjected to an electric furnace, the fine-grain...
4377564 Method of producing silicon  
A method of producing silicon comprising producing a plasma in a gas flow laden with at least one silicon compound so that the silicon compound is reduced or decomposed to silicon and transporting...
4374182 Preparation of silicon metal through polymer degradation  
What is disclosed is a method of forming silicon from the degradation of polychlorosilanes, a method of coating a substrate with said silicon and a product of said coating method. The method of...
4341749 Heating method for silane pyrolysis reactor  
An improved method for the pyrolysis of silane in a free-space reactor. The improved method involves non-uniform heat input along the axial length of a free-space silane pyrolysis reactor so that...
4340574 Process for the production of ultrahigh purity silane with recycle from separation columns  
Tri- and dichlorosilanes formed by hydrogenation in the course of the reaction of metallurgical silicon, hydrogen and recycle silicon tetrachloride are employed as feed into a separation column...
4331698 Method for making a very pure silicon  
A process for producing high purity silicon semiconductor materials and mls by the thermal decomposition of a gaseous compound containing the silicon semiconductor material or metal passing over...
4321420 Process for producing a layer containing silicon and photoelectric conversion device utilizing this process  
Process for producing layers of silicon or one of its alloys in pure or doped form and able to absorb optical radiation, the layers being of limited thickness, it comprising a first stage of...
4318942 Process for producing polycrystalline silicon  
An economical, low temperature, closed loop, thermal decomposition process is provided for producing a controllable mixture of heterogeneously and homogeneously nucleated ultrahigh purity...
4311545 Method for the deposition of pure semiconductor material  
The invention relates to a method and device for making pure semiconductor aterial by thermal decomposition of compounds of the semiconductor material on suitable carrier elements. The quantity and...
4301323 Lead-doped silicon with enhanced semiconductor properties  
Silicon having semiconductor properties, adapted for use as an optoelectronic component, in particular solar cells, has its optoelectronic properties improved by adding to the silicon an agent,...
4292344 Fluidized bed heating process and apparatus  
Capacitive electrical heating of a fluidized bed enables the individual solid particles within the bed to constitute the hottest portion thereof. This effect is achieved by applying an A. C....
Matches 101 - 150 out of 243 < 1 2 3 4 5 >