Patent ID: 7399661
Filing Date: 2008-07-15
Classification: H01L,H05K

Abstract:
1. A method for manufacturing an integrated circuit substrate for interconnecting a semiconductor die, comprising: mounting a prefabricated dielectric layer having a first conductive pattern disposed on a first side thereof in a laser drilling machine, the prefabricated dielectric layer having a second side opposing the first side and wherein the prefabricated dielectric layer further comprises a dielectric and an adhesive layer having the first conductive pattern formed on a top side thereof; laser-drilling a plurality of perforations comprising channels and blind via apertures from the second side of the prefabricated dielectric layer, the blind via apertures extending through to a back side of the first conductive pattern, the channels extending through the dielectric only and to the adhesive such that the adhesive remains between the channels and the first conductive pattern; and depositing metal through the perforations to form blind vias to the first conductive pattern from the second side of the prefabricated dielectric layer, wherein the depositing forms a second conductive pattern on the second side of the prefabricated dielectric layer.