Patent ID: 11967657
Assignee: MAXEON SOLAR PTE. LTD.
Field: Semiconductors (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 9:
10. A solar cell, comprising:
a substrate;
a thin dielectric layer disposed on the substrate;
a plurality of semiconductor regions deposed on the thin dielectric layer, wherein individual ones of the plurality of semiconductor regions are laterally spaced apart from one another;
a first metal layer disposed on the plurality of semiconductor regions; and
a plurality of metal foil portions above and electrically connected to first metal layer, wherein individual ones of the plurality of metal foil portions correspond to individual ones of the plurality of semiconductor regions, wherein individual ones of the plurality of metal foil portions are separated from one another, and wherein a plurality of metal welds electrically couple the plurality of metal foil portions to the first metal layer, and wherein a first one of the plurality of metal foil portions vertically overlaps the first semiconductor region, and a second one of the plurality of metal foil portions vertically overlaps the second semiconductor region, and the second one of the plurality of metal foil portions is laterally spaced apart from is electrically isolated from the first one of the plurality of metal foil portions by an oxide coating laterally between the first one of the plurality of metal foil portions and the second one of the plurality of metal foil portions, and the oxide coating is further vertically intervening between a portion of the first one of the plurality of metal foil portions and the first metal layer, and is vertically intervening between a portion of the second one of the plurality of metal foil portions and the first metal layer.