Process for the production of coarsely crystalline silicon

US4561930A · kind A · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ingo Schwirtlich · Miltenberg, DE
• Peter Woditsch · Krefeld, DE
• Wolfgang Koch · Batavia, US

Key dates

• Filing date: Mar 13, 1984
• Grant date: Dec 31, 1985
• Expiry date: Mar 13, 2004

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C30B29/605
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A process for the production of columnarly grown blocks of silicon containing coarsely crystalline regions comprising cooling a silicon melt in a mold, selectively effecting solidification at the melt surface and advancing the solidification front downwardly. The blocks can be sawed into chips, useful for solar cells.