Patent · US Expired

Method for producing highly pure, granular silicon

US6953559B2 · kind B2 · utility

7Cited by

5References

18Claims

0Family size

Assignee

SOLARWORLD AG · DE

Inventors

Leslaw Mleczko · Bochum, DE
Sigurd Buchholz
Maria Pilar Ezpeleta Tejero · Leverkusen, DE
Felix-Karl Oliver Schlüter · Mülheim an der Ruhr, DE

Key dates

Filing date	Nov 21, 2001
Grant date	Oct 11, 2005
Priority date	—
Expiry date	Mar 23, 2022

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P70/50
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

The invention relates to a method for producing highly pure, granular silicon by decomposing a gas containing silicon in a procedure comprising at least two operating states, at least one state comprising the increased formation of nucleus particles from the decomposition of said gas containing silicon and at least one other state comprising the increased separation of the silicon with expansion of the diameter of the silicon granules. The invention also relates to the use of silicon produced in this way and to highly pure, granular silicon particles which are characterised by a coreless structure.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.