Patent ID: 9735126
Date: 2017-08-15
CPC Classifications: B23K,C22C,H01L

Claim:
1. An arrangement comprising, a chip having a chip back side; a substrate comprising a surface; a zinc-based solder alloy configured to attach the chip back side to the surface of the substrate, wherein the zinc-based solder alloy consists essentially of: zinc, aluminum and germanium, wherein the aluminum constitutes by weight 1% to 20% of the alloy, the germanium constitutes by weight 1% to 20% of the alloy, and zinc; wherein the surface of the substrate comprises a metal layer disposed between the substrate and the zinc-based solder alloy that provides a good wettability of the zinc-based solder alloy on the surface of the substrate, the zinc-based solder alloy being disposed between the metal layer and the chip back side.