Patent ID: 6693031
Filing Date: 2004-02-17
Classification: H01L,H05K

Abstract:
A method for forming an electronic structure, comprising the steps of:providing a substrate having a metallic sheet interior to a dielectric layer, said metallic sheet including a metal; laser drilling a blind opening through the dielectric layer and partially through the metallic sheet, said laser drilling creating a metallic protrusion that is integral with a portion of the metallic sheet, said metallic protrusion having metallic strands such that each metallic strand includes the metal and at least one constituent element from the dielectric layer; and etching a portion of the metallic protrusion to form a metallic interlocking structure that is integral with the portion of the metallic sheet and projects into the blind opening, wherein the resulting metallic interlocking structure includes discrete metallic fibers having a curved geometry, and wherein each metallic fiber has its own unique composition that includes material selected from a group consisting of the metal, the at least one constituent element of the dielectric layer, and combinations thereof.