Patent ID: 8580607

Claim:
A method of making an assembly, comprising: (a) applying metallic nanoparticles having long dimensions smaller than 100 nanometers to exposed surfaces of conductive elements of at least one of a first component and a second component, each component being any of a microelectronic element having active semiconductor devices therein, a dielectric element, a semiconductor element, or a microelectronic assembly including a microelectronic element and a substrate attached thereto, wherein the conductive elements of at least one of the first component and the second component include substantially rigid posts having top surfaces projecting a height above the surface of the respective component and edge surfaces extending at substantial angles away from the top surfaces thereof; (b) juxtaposing the conductive elements of the first component with the conductive elements of the second component with the metallic nanoparticles disposed therebetween, and (c) elevating a temperature at least at interfaces of the juxtaposed conductive elements to a joining temperature at which the metallic nanoparticles cause metallurgical joints to form between the juxtaposed conductive elements.