Patent ID: 7081405

Claim:
A method of forming a package module of at least one IC device comprising: providing a surface, having a first surface and a second surface; placing and affixing at least one semiconductor device with a plurality of metal pads on said first surface of said substrate; performing a laser alignment procedure, and then performing a laser drilling process from said second surface of said substrate to form a plurality of via holes, each of which is aligned to and touches one of said metal pads; performing a cleaning process to clean the said second surface of said substrate and the inner surfaces of the said via holes; forming a metal layer on said second surface of said substrate, and also filling into said via holes to form a plurality of metal plugs, each of which is connected to one metal pad of said semiconductor device; forming an interconnected layer on said second surface of said substrate by performing a photo lithographic process and an etching process on the metal layer; wherein said interconnected layer is composed of a plurality of metal circuits, a plurality of land pads, and a plurality of via pads.