METHOD FOR REGENERATING A SILICON SLUDGE

PROBLEM TO BE SOLVED: To provide a method for regenerating a silicon sludge capable of manufacturing, by using a sludge of silicon particulates discarded in the prior art as a raw ingredient, a regenerated silicon bulk usable industrially and inexpensively as polycrystalline silicon for solar cells....

Full description

Saved in:
Bibliographic Details
Main Authors NAKAZAWA SHIGERU, ETO MOTOKI, MUKAI TOSHIO, KONDO JIRO
Format Patent
LanguageEnglish
Published 27.02.2014
Subjects
ADHESIVES
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOUNDS THEREOF
DYES
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
INORGANIC CHEMISTRY
MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE
METALLURGY
MISCELLANEOUS APPLICATIONS OF MATERIALS
MISCELLANEOUS COMPOSITIONS
NATURAL RESINS
NON-METALLIC ELEMENTS
PAINTS
POLISHES
SEMICONDUCTOR DEVICES
TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
Online AccessGet full text

Cover

More Information
Summary:PROBLEM TO BE SOLVED: To provide a method for regenerating a silicon sludge capable of manufacturing, by using a sludge of silicon particulates discarded in the prior art as a raw ingredient, a regenerated silicon bulk usable industrially and inexpensively as polycrystalline silicon for solar cells.SOLUTION: On an occasion for regenerating, as polycrystalline silicon for solar cells, a sludge of silicon particulates generated from semiconductor wafer and solar cell plants, the sludge is washed with a washing water supply including specified dosages of HF and a dispersant, dissolved within an inert gas atmosphere or a reduced pressure/vacuum atmosphere, and then coagulated so as to remove impurities therefrom.
Bibliography:Application Number: JP20120179153