Device and method for the production of silicon blocks

US9114990B2 · kind B2 · utility

Assignee

• SOLARWORLD INNOVATIONS GMBH · DE

Inventors

• Marc Dietrich · Gießen, DE
• Mark Hollatz · Neustadt, DE
• Robert Zacharias · Fountain Inn, US
• Bernhard Freudenberg · Coburg, DE

Key dates

• Filing date: Jun 2, 2011
• Grant date: Aug 25, 2015
• Expiry date: Jun 25, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C30B29/06
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A device for the production of silicon blocks comprises a vessel for receiving a silicon melt, the vessel comprising a vessel wall comprising at least one side wall and a bottom as well as an inside and an outside and a central longitudinal axis, and means for creating a temperature field on the inside of the bottom, the temperature field having a temperature gradient at the bottom of the vessel which is perpendicular to the central longitudinal axis at least in some regions when the silicon melt cools down for crystallization.