Patent · US Active

Method for producing silicon wafers, and silicon solar cell

US9109302B2 · kind B2 · utility

0Cited by

3References

13Claims

0Family size

Assignee

SOLARWORLD INNOVATIONS GMBH · DE

Inventors

Andreas Krause · Frankfurt am Main, DE
Juliane Walter · Halsbrücke, DE
Marc Dietrich · Gießen, DE
Josef Stenzenberger · Freiberg, DE

Key dates

Filing date	Jun 7, 2011
Grant date	Aug 18, 2015
Priority date	—
Expiry date	Sep 26, 2032

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P70/50
WIPO fieldSurface technology, coating
WIPO sectorChemistry

Abstract

In order to produce silicon wafers, liquid ultra-pure silicon is solidified on a silicon monocrystalline seed arranged in the bottom area of a crucible and having a seed surface comprising a {110}-crystal orientation and an edge surface having a {100}-crystal orientation starting from the bottom of the crucible, thus forming a silicon block on the seed surface of the silicon monocrystalline seed which largely takes over the {110}-crystal orientation. Subsequently, the silicon block is divided into wafers with a wafer surface having a {100}-crystal orientation.

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