US 12,484,314 B2
Wire-based metallization and stringing for solar cells
Richard Hamilton Sewell, Los Altos, CA (US); Matthieu Minault Reich, San Jose, CA (US); Andrea R. Bowring, Mountain View, CA (US); Arbaz Shakir, Santa Clara, CA (US); Ryan Reagan, Hayward, CA (US); and Matthew Matsumoto, Pasadena, CA (US)
Assigned to Maxeon Solar Pte. Ltd., Singapore (SG)
Filed by Maxeon Solar Pte. Ltd., Singapore (SG)
Filed on Jan. 5, 2024, as Appl. No. 18/405,720.
Application 18/405,720 is a division of application No. 17/032,975, filed on Sep. 25, 2020, granted, now 11,901,470.
Claims priority of provisional application 62/907,471, filed on Sep. 27, 2019.
Prior Publication US 2024/0145607 A1, May 2, 2024
Int. Cl. H10F 19/90 (2025.01); H10F 71/00 (2025.01)
CPC H10F 19/902 (2025.01) [H10F 19/908 (2025.01); H10F 71/1375 (2025.01)] 20 Claims
OG exemplary drawing
 
1. A method of fabricating a solar cell string, the method comprising:
positioning at least two solar cells adjacent to one another, wherein emitter regions of a first solar cell are in alignment with emitter regions of a second solar cell;
positioning an intervening structure between the first and second solar cells in a location outside of a footprint of the first and second solar cells;
positioning a plurality of wires in alignment with the emitter regions of the first and second solar cells;
performing a thermocompression process to bond the plurality of wires to the emitter regions of the first and second solar cells, the thermocompression bonding performed in the presence of the intervening structure, wherein one or more of the plurality of wires has a bottom surface with a flat region, rounded side surfaces, and a top surface with a flat region between the first and second solar cells in the location outside of a footprint of the first and second solar cells;
removing the intervening structure from between the first and second solar cells subsequent to performing the thermocompression process;
positioning an interconnect material in contact with the plurality of wires, wherein the interconnect material is positioned between the first and second solar cells; and
performing a welding and cutting process on the interconnect material and the plurality of wires.