Patent ID: 6671947
Filing Date: 2004-01-06
Classification: H01L,Y10T

Abstract:
A method of making an interposer comprising:forming a first set of interconnect lines over a first surface of a substrate; forming a second set of interconnect lines over the first surface of the substrate; and forming vias between the first set of interconnect lines and the second set of interconnect lines, the method further comprising: forming a first oxide layer on a first surface of a substrate and a second oxide layer on a second surface of the substrate; forming a first silicon nitride layer superjacent to the first oxide layer; patterning the first silicon nitride layer to expose portions of the first silicon nitride layer, etching the exposed portions of the first silicon nitride layer to form trenches; sputtering a copper barrier layer and a copper seed layer over the first surface of the substrate; electroplating a conductive material over the copper seed layer; forming interconnect lines over the first surface of the substrate; and depositing a second silicon nitride layer over the first surface of the substrate.