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

Claim 0:
1. A solar cell, comprising:
a substrate;
a first semiconductor region disposed above the substrate;
a second semiconductor region disposed above the substrate, wherein the second semiconductor region is laterally spaced apart from the first semiconductor region;
a first metal layer disposed on the first and the second semiconductor regions; and
a plurality of metal foil portions disposed on the first metal layer, wherein a plurality of metal welds electrically couples 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 and 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.