SunPower Corporation
SUBTRACTIVE METALLIZATION FOR SOLAR CELLS

Abstract:

Subtractive metallization approaches for fabricating solar cells, and the resulting solar cells, are described. In an example, a solar cell includes a semiconductor region in or above a substrate. A metal foil portion can include an adhesive layer thereon. The adhesive layer is above the semiconductor region and has an opening therein exposing a portion of the semiconductor region. A conductive material is on and electrically coupled to the portion of the semiconductor region exposed by the opening in the adhesive layer. The conductive material is further on and electrically coupled to the metal foil portion.