Patent ID: 6955982

Claim:
A method for forming an electrical structure, comprising the steps of: providing a first structure, including a first substrate, a first conductive body mechanically and electrically coupled to the first substrate, and a nonsolderable and nonconductive material, wherein the nonsolderable and nonconductive material volumetrically surrounds and contacts a first portion of a surface of the first conductive body such that a second portion of the surface of the first conductive body is not contacted by the nonsolderable and nonconductive material; providing a second structure, including a second substrate and a conductive bump mechanically and electrically coupled to the second substrate; placing the second structure in contact with the first structure such that the conductive bump is in contact with the second portion of the surface of the first conductive body; reflowing the conductive bump without melting any portion of the first conductive body to form a second conductive body, wherein the second conductive body covers the second portion of the surface of the first conductive body; and cooling the first structure and the second structure to solidify the second conductive body and to mechanically and electrically couple the second conductive body to the first conductive body by surface adhesion at the second portion of the surface of the first conductive body.