Patent ID: 8647922

Claim:
A method of forming a wire bond-free conductive interconnect area on a semiconductor substrate, the method comprising: providing a semiconductor substrate, said semiconductor substrate comprising an electrically conductive protrusion defining a bond pad; providing a plurality of electrically conductive nanofilaments; and immobilizing the plurality of electrically conductive nanofilaments on the electrically conductive protrusion by allowing at least one random portion of the electrically conductive nanofilaments along the length thereof to attach to the surface of the electrically conductive protrusion, and deflecting a plurality of the electrically conductive nanofilaments attached to the surface of the electrically conductive protrusion forming an aggregate of loops of electrically conductive nanofilaments on the surface of the electrically conductive protrusion, thereby forming a conductive interconnect area on the electrically conductive protrusion without heat treatment; and wherein the plurality of electrically conductive nanofilaments is dispersed in a liquid and is immobilized and deflected on the electrically conductive protrusion according to one of A) by dielectrophoresis; and B) by (i) depositing the plurality of electrically conductive nanofilaments dispersed in the liquid on the electrically conductive protrusion and (ii) allowing a portion of the liquid to be removed, thereby allowing the surface tension of the liquid to force the plurality of electrically conductive nanofilaments to contact the surface of the conductive protrusion; and wherein the electrically conductive nanofilaments are selected to be of a flexibility that allows the surface tension of the liquid to deflect the electrically conductive nanofilaments dispersed therein upon contact with the surface of the liquid.