Patent ID: 6521530
Filing Date: 2003-02-18
Classification: H01L,H05K

Abstract:
A method for fabricating a composite interposer comprising the steps of:(a) disposing a silicon layer on a substrate: (b) selectively etching the silicon layer down to the substrate to develop silicon openings with a silicon profile, and to expose part of the substrate; (c) forming vias through the exposed part of the substrate; (d) filling the vias and the silicon openings with a filler material to form filled silicon openings and filled vias; (e) forming first openings through the filled silicon openings and through the filled vias; (f) forming second openings through filler material to expose semiconductor devices on the silicon layer; and (g) interconnecting electrically, through the first openings and through the second openings, the exposed semiconductor devices with pads.