US Patent 10186493 Semiconductor copper metallization structure and related methods

Implementations of semiconductor packages may include: a silicon die including a pad, the pad including aluminum and copper; a passivation layer over at least a portion of the silicon die and a layer of one of a polyimide (PI) a polybenzoxazole (PBO), or a polymer resin coupled to the passivation layer. The package may include a first copper layer coupled over the pad, the first copper layer being about 1 microns to about 20 microns thick; a second copper layer coupled over the first copper layer, the second copper layer may be about 5 microns to about 40 microns thick; where a width of the first copper layer above the pad may be wider than a width of the second copper layer above the pad. The first and second copper layers may be configured to bond with a heavy copper wire or solder with a copper clip.