Patent ID: 7682972
Filing Date: 2010-03-23
Classification: H01L,H05K

Abstract:
1. A method of fabricating a free standing membrane comprising a via array in a dielectric surround comprising polymer, for use as a precursor in the construction of superior electronic support structures, comprising the stages: I—fabricating a membrane comprising conductive vias in a dielectric surround comprising polymer on a sacrificial carrier, comprising the sub-steps of: (i) panel plating a barrier metal layer onto a sacrificial carrier; (ii) applying a seed layer of copper onto the barrier metal layer; (iii) applying, exposing and developing a photoresist layer onto the copper seed layer to form patterns; (iv) pattern plating copper vias into the photo resist patterns; (v) stripping away the photoresist layer leaving the upstanding copper vias, and (vi) laminating a dielectric material layer over the copper vias, such that the free standing membrane formed thereby comprises a copper via array in a dielectric matrix; and II—detaching the membrane from the sacrificial carrier to form a free standing laminated array.