Patent application number | Description | Published |
20100001106 | METHOD AND DEVICE FOR PRODUCING CLASSIFIED HIGH-PURITY POLYCRYSTALLINE SILICON FRAGMENTS - Polysilicon rods from the Siemens process are crushed into fragments and further processed to fragments having very low metal contamination in an economical manner by purposefully fabricating parts contacting the polysilicon from materials which cause high metal contamination, and removing the metal contamination by a cleaning bath or baths tailored to the particular metal contamination. By this process, economical materials previously scrupulously avoided, such as low alloy steel, can be used for crushers, conveyors, and other polysilicon-contacting parts of the crushing and classifying system. | 01-07-2010 |
20100154357 | METHOD AND DEVICE FOR PACKAGING POLYCRYSTALLINE BULK SILICON - An automated filling system for introducing crushed polysilicon fragments into shipping bags without significant contamination positions a freely suspended energy absorber into a freely suspended bag of non-contaminating material prior to filling, and following filling, the energy absorber is removed, and the bag is sealed. The system can replace manual packaging which has been required for semiconductor applications. | 06-24-2010 |
20100300495 | METHOD FOR PURIFYING POLYCRYSTALLINE SILICON - Polysilicon fragments are purified to remove metal contaminates by contacting the fragments with a purifying liquid at a flow rate >100 mm/sec. Effective removal without abrasion is accomplished. | 12-02-2010 |
20110083249 | Breathable Glove For Use In Packing and Sorting High-Purity Silicon - A breathable polyethylene glove as an overglove, over a cut- and puncture-resistant and nonfuzzing underglove, is useful for the non-contaminating packing of high-purity silicon, such as chunk polysilicon and silicon wafers. | 04-14-2011 |
20110186087 | PROCESS FOR PURIFYING POLYCRYSTALLINE SILICON - Polysilicon is freed of metallic impurities without the use of HCl or H | 08-04-2011 |
20120060562 | METHOD FOR PRODUCING THIN SILICON RODS - The invention relates to a method for producing thin silicon rods ( | 03-15-2012 |
20130025625 | PROCESS FOR CLEANING POLYCRYSTALLINE SILICON CHUNKS - Disclosed is a process for cleaning polycrystalline silicon chunks in an acidic cleaning bath, wherein: (a) the cleaning includes several cleaning cycles, (b) a particular amount of acid is consumed in each cycle, (c) a computer-controlled dosage system integrator adds up those amounts of acid consumed in each cycle to give a current total consumption of acid in the bath, and (d) on attainment of a total consumption of acid in the bath corresponding to an optimal dosage of the dosage system, the dosage system supplies this optimal dosage of unconsumed acid withdrawn from a reservoir vessel to the bath. Another process for cleaning polycrystalline silicon chunks in an acidic cleaning bath includes an acid circuit in which acid is circulated, wherein the ratio of amount of acid circulated in liters to the mass of polysilicon chunks present in the bath in kg is greater than 10. | 01-31-2013 |
20130186325 | PROCESS FOR DETERMINING SURFACE CONTAMINATION OF POLYCRYSTALLINE SILICON - The invention provides a process for determining surface contamination of polycrystalline silicon, including the steps of: a) providing two polycrystalline silicon rods by deposition in a Siemens reactor; b) determining contaminants in the first of the two rods immediately after the deposition; c) conducting the second rod through one or more systems in which polycrystalline silicon rods are processed further to give rod pieces or polysilicon fragments, optionally cleaned, stored or packed; d) then determining contaminants in the second rod; wherein the difference in the contaminants determined in the first and second rods gives surface contamination of polycrystalline silicon resulting from systems and the system environment. | 07-25-2013 |
20130189176 | LOW-DOPANT POLYCRYSTALLINE SILICON CHUNK - The invention provides a polycrystalline silicon chunk having a concentration of 1-50 ppta of boron and 1-50 ppta of phosphorus at the surface. | 07-25-2013 |
20140037959 | POLYCRYSTALLINE SILICON CHUNKS AND METHOD FOR PRODUCING THEM - The present invention relates to polycrystalline silicon chunks which are cubic and have a metal content of less than 200 pptw and a dopant content of less than 50 ppta. Methods for producing polycrystalline silicon chunks, include the steps of providing a polycrystalline silicon rod, comminuting the polycrystalline silicon rod into cubic chunks, and cleaning the polycrystalline silicon chunks, wherein comminution takes place using a spiked-roll crusher having at least one spiked roll, the spiked roll including W | 02-06-2014 |
20140151259 | PACKING OF POLYSILICON - A bag contains polysilicon, has been welded and includes at least one weld seam and a polyethylene film having: a thickness of 150-900 μm; a stiffness at a flexural modulus | 06-05-2014 |
20150075559 | METHOD FOR PURIFYING POLYCRYSTALLINE SILICON - Polysilicon fragments are purified to remove metal contaminates by contacting the fragments with a purifying liquid at a flow rate >100 mm/sec. Effective removal without abrasion is accomplished. | 03-19-2015 |
Patent application number | Description | Published |
20130001010 | ABATING LOW-FREQUENCY NOISE USING ENCAPSULATED GAS BUBBLES - Air bubbles may be used to reduce radiated underwater noise. Two modalities of sound attenuation by air bubbles were shown to provide a reduction in radiated sound: bubble acoustic resonance damping and acoustic impedance mismatching. The bubbles used for acoustic resonance damping were manifested using gas-filled containers coupled to a support, and the acoustic impedance mismatching bubbles were created using a cloud of freely-rising bubbles, which were both used to surround an underwater sound source. | 01-03-2013 |
20150083520 | Underwater Noise Abatement Panel and Resonator Structure - A system for reducing noise emissions in underwater environments is presented. The system can be extended to applications in any two-fluid environments where one fluid (gas) is contained in an enclosed resonator volume connected to the outside environment at an open end of the resonator body. The resonators act as gas-containing (e.g., air) Helmholtz resonators constructed into solid panels that are submerged in the fluid medium (e.g., sea water) in the vicinity of a noise generating source. The oscillations of the trapped air volume in the resonators causes reduction of certain noise energy and a general reduction in the transmitted noise in the environment of the system. | 03-26-2015 |
20160120211 | Method and Apparatus for Controlling Coffee Bean Roasting - A system and method for roasting coffee beans, or similar products, is disclosed. In an aspect the invention includes an acoustic sensor, such as a microphone, which senses the acoustic emissions or “cracks” made by the coffee beans during the roasting process. The acoustic emissions are translated in the system and method to signals that are processed, including in some aspects using frequency domain processing, so as to control the roasting process and achieve a desired final product. The acoustic emissions can also be used to determine if the coffee beans are caffeinated or decaffeinated. | 05-05-2016 |