Stud bump structure and method for forming the same

A stud bump structure and method for manufacturing the same are provided. The stud bump structure includes a substrate, and a first silver alloy stud bump disposed on the substrate, wherein the first silver alloy stud bump has a weight percentage ratio of Ag:Au:Pd=60-99.98:0.01-30:0.01-10. The stud bump structure of the invention has the advantage of very high reliability.