Patent ID: 6675473
Filing Date: 2004-01-13
Classification: H01L,H05K,Y10T

Abstract:
A method of constructing a multilayer electric apparatus, comprising the steps of:providing a set of flexible dielectric layers; forming a set of conductive features and at least one fiducial marking on a first one of said flexible dielectric layers, said conductive features and said at least one fiducial marking formed in mutual reference to each other so that their relative positions are known to a first tolerance, said conductive features being separate from said fiducial marking; joining together said flexible dielectric layers to form a stack, such that first said dielectric layer is interposed between others of said dielectric layers and said at least one fiducial marking is distinctly observable from outside of said stack, said stack having an exterior surface; drilling a via from said exterior surface to one of said conductive features of said first one of said dielectric layers, referencing said drilling to said at least one fiducial marking.