Laser assisted metallization process for solar cell circuit formation

• Main Authors: Hsia, Benjamin I, Sewell, Richard Hamilton, Barkhouse, David Aaron Randolph, Reagan, Ryan, Abra, Lewis C, Nguyen, Thierry, Lu, Pei Hsuan, Lance, Tamir, Kavulak, David F, Okawa, David C, Correos, George G
• Format: Patent
• Language: English
• Published: 09.05.2023
• Subjects: BASIC ELECTRIC ELEMENTS; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; GENERATION; GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRA-REDRADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, E.G. USINGPHOTOVOLTAIC [PV] MODULES; SEMICONDUCTOR DEVICES

A method of fabricating solar cell, solar laminate and/or solar module string is provided. The method may include: locating a metal foil over a plurality of semiconductor substrates; exposing the metal foil to laser beam over selected portions of the plurality of semiconductor substrates, wherein exposing the metal foil to the laser beam forms a plurality conductive contact structures having of locally deposited metal portion electrically connecting the metal foil to the semiconductor substrates at the selected portions; and selectively removing portions of the metal foil, wherein remaining portions of the metal foil extend between at least two of the plurality of semiconductor substrates.