Application of semiconductor diffusants to solar cells by screen printing

US4104091A · kind A · utility

Assignee

• The United States of America as represented by the Administrator of the National Aeronautics and Space Administration · US

Inventors

• John C. Evans · Midland, US
• Henry W. Brandhorst, Jr. · Auburn, US
• George A. Mazaris · Brook Park, US
• Larry R. Scudder · Berea, US

Key dates

• Filing date: May 20, 1977
• Grant date: Aug 1, 1978
• Expiry date: May 20, 1997

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y02E10/547
• WIPO field: Semiconductors
• WIPO sector: Electrical engineering

Abstract

Diffusants are applied onto semiconductor solar cell substrates using screen printing techniques. The method is applicable to square and rectangular cells and can be used to apply dopants of opposite types to the front and back of the substrate. Then, simultaneous diffusion of both dopants can be performed with a single furnace pass.