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Sequential Purification And Crystal Growth For The Production Of Low Cost Silicon Substrates Final Technical Report For 15 September 1979 1 January 1982
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Book Synopsis Sequential Purification and Crystal Growth for the Production of Low Cost Silicon Substrates: Final Technical Report for 15 September 1979 - 1 January 1982 by :
Download or read book Sequential Purification and Crystal Growth for the Production of Low Cost Silicon Substrates: Final Technical Report for 15 September 1979 - 1 January 1982 written by and published by . This book was released on 1983 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sequential Purification and Crystal Growth for the Production of Low Cost Silicon Substrates. Annual Report, 15 September 1979-14 September 1980 by :
Download or read book Sequential Purification and Crystal Growth for the Production of Low Cost Silicon Substrates. Annual Report, 15 September 1979-14 September 1980 written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this program is to identify and develop low cost processing for fabricating large grain size polycrystalline silicon substrates. Metallurgical grade silicon (MG-Si) which is low cost and abundant for industrial usage was chosen as starting material. However, MG-Si cannot be used directly as substrates for solar cell fabrication for the following reasons: (1) it contains 1 to 2% metallic impurities, and (2) it is produced as irregular shapes with a fine grain structure. Various purification techniques have been reported. The techniques being studied under this program use direct methods for the purification of MG-Si. The process uses sequential steps of purification followed by crystal growth. The steps of sequential purification include: (1) leaching of MG-Si charge, (2) phase separation of non-soluble impurities from molten silicon, (3) reactive gas treatment of molten silicon, (4) liquid-liquid extraction (called slagging), and (5) impurity redistribution using ingot pulling. All the purification steps, with the exception of step (1), are performed in a consecutive manner using a crystal puller. The purified ingots will be produced in a desired ingot dimension and further recrystallization is not necessary. The theory and experimental results for each purification technique are presented. The relative effectiveness of the various steps are assessed and the most important step(s) are recommended. Finally the electrical characteristics of solar cells built on a thin epitaxial layer deposited on single pulled MG-Si substrates are discussed and compared to single crystal substrates. (WHK).
Book Synopsis Sequential Purification and Crystal Growth for the Production of Low Cost Silicon Substrates by : Ming Liaw
Download or read book Sequential Purification and Crystal Growth for the Production of Low Cost Silicon Substrates written by Ming Liaw and published by . This book was released on 1981 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: The need for low cost silicon for solar cell applications has stimulated the study of direct purification of metallurgical-grade silicon (MG-Si). The technique of sequential purification of molten silicon was investigated. The sequential purification steps included (1) physical separation of insoluble impurities, (2) reactive gas treatment, (3) slagging and (4) impurity redistribution using ingot pulling. The results have shown that the ingot pulling is the most effective step of the purification process. This has been predicted since the majority of metal impurities in silicon have very low segregation coefficients (from 10 -2 to 10 -6). In theory the ingot pulled from the molten silicon will be two to six orders of magnitude lower in the metal concentration than that in the original silicon used for melting. By the same token the pulled ingots can be remelted and repulled. The purity of the silicon can be improved by another 2 to 6 orders of magnitude. The process can be repeated for further purification. The purpose of this paper is to report the purity, structural and electrical characteristics of silicon ingots obtained by various number of crystal pulling.
Download or read book Solar Energy Update written by and published by . This book was released on 1983-04 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1983 with total page 1474 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Sequential Purification and Crystal Growth for the Production of Low Cost Silicon Substrates by :
Download or read book Sequential Purification and Crystal Growth for the Production of Low Cost Silicon Substrates written by and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this program is to identify and develop low cost precessing for fabricating large grain size polycrystalline silicon substrates. Metallurgical grade silicon (MG-Si) is chosen as the starting material for sequential purification and crystal growth. Several purification techniques have been studied. They include (1) acid leaching with HCl, (2) physical separation of insoluble impurities, (3) reactive gas treatment of molten silicon, and (4) slagging using a mixed-oxide slag. In this quarterly period purification by vaccum treatment and by impurity redistribution using ingot pulling has been studied. Procedures and results are reported.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1982 with total page 1010 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Book Synopsis Sequential Purification and Crystal Growth for the Production of Low Cost Silicon Substrates by :
Download or read book Sequential Purification and Crystal Growth for the Production of Low Cost Silicon Substrates written by and published by . This book was released on 1980 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this program is to identify and develop low cost processing for fabricating large grain size polycrystalline silicon substrates. Metallurgical grade silicon (MG-Si) is chosen as the starting material for sequential purification and crystal growth. As shown in the previous two technical reports, several purification techniques have been studied. They include (l) acid leaching with HCl, (2) physical separation of insoluble impurities, (3) reactive gas treatment of molten silicon, and (4) slagging using a mixed-oxide slag. In this quarterly period purification by vacuum treatment and by impurity redistribution using ingot pulling has been studied.
Book Synopsis Government Reports Announcements & Index by :
Download or read book Government Reports Announcements & Index written by and published by . This book was released on 1984-06 with total page 1056 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interference Problems on Wing-fuselage Combinations in Inviscid, Incompressible Flow by : Aeronautical Research Council (Great Britain)
Download or read book Interference Problems on Wing-fuselage Combinations in Inviscid, Incompressible Flow written by Aeronautical Research Council (Great Britain) and published by . This book was released on 1974 with total page 1212 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Energy Research Abstracts written by and published by . This book was released on 1982 with total page 844 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Government Reports Annual Index: Keyword A-L by :
Download or read book Government Reports Annual Index: Keyword A-L written by and published by . This book was released on 1983 with total page 1216 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Low-cost Silicon Substrates by Directional Solidification by : Frederick Schmid
Download or read book Low-cost Silicon Substrates by Directional Solidification written by Frederick Schmid and published by . This book was released on 1980 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis High-Purity Silicon Crystal Growth Investigations; Final Technical Progress Report, 1 September 1984 - 31 March 1986 by :
Download or read book High-Purity Silicon Crystal Growth Investigations; Final Technical Progress Report, 1 September 1984 - 31 March 1986 written by and published by . This book was released on 1986 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Crystal Growth and Evaluation of Silicon for VLSI and ULSI by : Golla Eranna
Download or read book Crystal Growth and Evaluation of Silicon for VLSI and ULSI written by Golla Eranna and published by CRC Press. This book was released on 2014-12-08 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: Silicon, as a single-crystal semiconductor, has sparked a revolution in the field of electronics and touched nearly every field of science and technology. Though available abundantly as silica and in various other forms in nature, silicon is difficult to separate from its chemical compounds because of its reactivity. As a solid, silicon is chemically inert and stable, but growing it as a single crystal creates many technological challenges. Crystal Growth and Evaluation of Silicon for VLSI and ULSI is one of the first books to cover the systematic growth of silicon single crystals and the complete evaluation of silicon, from sand to useful wafers for device fabrication. Written for engineers and researchers working in semiconductor fabrication industries, this practical text: Describes different techniques used to grow silicon single crystals Explains how grown single-crystal ingots become a complete silicon wafer for integrated-circuit fabrication Reviews different methods to evaluate silicon wafers to determine suitability for device applications Analyzes silicon wafers in terms of resistivity and impurity concentration mapping Examines the effect of intentional and unintentional impurities Explores the defects found in regular silicon-crystal lattice Discusses silicon wafer preparation for VLSI and ULSI processing Crystal Growth and Evaluation of Silicon for VLSI and ULSI is an essential reference for different approaches to the selection of the basic silicon-containing compound, separation of silicon as metallurgical-grade pure silicon, subsequent purification, single-crystal growth, and defects and evaluation of the deviations within the grown crystals.
Book Synopsis CRC Handbook of Metal Etchants by : Perrin Walker
Download or read book CRC Handbook of Metal Etchants written by Perrin Walker and published by CRC Press. This book was released on 1990-12-11 with total page 1434 pages. Available in PDF, EPUB and Kindle. Book excerpt: This publication presents cleaning and etching solutions, their applications, and results on inorganic materials. It is a comprehensive collection of etching and cleaning solutions in a single source. Chemical formulas are presented in one of three standard formats - general, electrolytic or ionized gas formats - to insure inclusion of all necessary operational data as shown in references that accompany each numbered formula. The book describes other applications of specific solutions, including their use on other metals or metallic compounds. Physical properties, association of natural and man-made minerals, and materials are shown in relationship to crystal structure, special processing techniques and solid state devices and assemblies fabricated. This publication also presents a number of organic materials which are widely used in handling and general processing...waxes, plastics, and lacquers for example. It is useful to individuals involved in study, development, and processing of metals and metallic compounds. It is invaluable for readers from the college level to industrial R & D and full-scale device fabrication, testing and sales. Scientific disciplines, work areas and individuals with great interest include: chemistry, physics, metallurgy, geology, solid state, ceramic and glass, research libraries, individuals dealing with chemical processing of inorganic materials, societies and schools.
Book Synopsis A Century of Innovation by : 3M Company
Download or read book A Century of Innovation written by 3M Company and published by 3m Company. This book was released on 2002 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: A compilation of 3M voices, memories, facts and experiences from the company's first 100 years.
