Patent ID: 8916970

Claim:
A method for welding a gold-silicon eutectic chip, comprising: electroplating a gold layer with a thickness smaller than or equal to 1 micron on all outer surfaces of a metal-material chip carrier, wherein the metal-material chip carrier comprises a top surface, a bottom surface, and side surfaces, and wherein the top surface, the bottom surface, and the side surfaces are electroplated with the gold layer; bonding multiple gold protrusions on the gold layer in a welding region of the metal-material chip carrier, wherein the welding region of the metal-material chip carrier comprises a portion of the top surface of the metal-material chip carrier; and rubbing a silicon chip in the welding region at a eutectic temperature to cause the gold protrusions to react with a surface of the silicon chip to form silicon-gold welding points to implement packaging of the silicon chip on the metal-material chip carrier.