Patent ID: 7421777
Filing Date: 2008-09-09
Classification: H01L,H05K,Y10T

Abstract:
1. A method of manufacturing a multilayer wiring substrate, including the steps of: providing a first wiring substrate having a first conductor pattern; forming a second wiring substrate having a second conductor pattern therein on a supporting sheet made of metal; forming an adhesive layer on said formed second wiring substrate; forming an interlayer connection in the adhesive layer, said the interlayer connection electrically linked to said second conductor pattern; stacking said second wiring substrate through said adhesive layer on a predetermined region of said first wiring substrate, and electrically connecting said interlayer connection and said first conductor pattern; removing said supporting sheet from said second wiring substrate, and further wherein said supporting sheet is comprised of a metal base member and a melting metal layer on which said second wiring substrate is formed and which is separately stacked on said metal base member, and the step of removing said supporting sheet includes a step of separating and removing said metal base member from said melting metal layer and a step of selectively melting and removing only said melting metal layer from said second wiring substrate containing said second conductor pattern.