Production of high-purity silicon ingot

Production of high-purity silicon ingot

A process for producing high-purity silicon for solar cells continuously directly from inexpensive silicon containing a comparatively large amount of impurities. This process comprises melting continuously supplied raw material silicon in a bottomless crucible placed in an induction coil, while blow...

Ausführliche Beschreibung

Gespeichert in:
Bibliographische Detailangaben
Hauptverfasser: ARATANI, FUKUO, KANEKO, KYOJIRO
Format: Patent
Sprache:eng
Schlagworte:
AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUSPOLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE
APPARATUS THEREFOR
BASIC ELECTRIC ELEMENTS
CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
CHEMISTRY
COMPOUNDS THEREOF
CRYSTAL GROWTH
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
PERFORMING OPERATIONS
POWDER METALLURGY
PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE
REFINING BY ZONE-MELTING OF MATERIAL
SEMICONDUCTOR DEVICES
SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITHDEFINED STRUCTURE
SINGLE-CRYSTAL-GROWTH
TRANSPORTING
UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL ORUNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL
Online-Zugang:Volltext bestellen
Tags: Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
Beschreibung
Zusammenfassung:A process for producing high-purity silicon for solar cells continuously directly from inexpensive silicon containing a comparatively large amount of impurities. This process comprises melting continuously supplied raw material silicon in a bottomless crucible placed in an induction coil, while blowing a hot plasma gas incorporated with an oxygen-containing substance on the surface of the melt for purification, and continuously discharging the solidified silicon downward from said bottomless crucible, with at least an axial part of said bottomless crucible being divided into a plurality of electrically conductive pieces spaced circumferentially.