Patent ID: 7731812
Filing Date: 2010-06-08
Classification: B22F,C22C,H01L,H05K,Y10T

Abstract:
1. A method of forming a multilayer circuit comprising: a) forming a patterned array of vias in a plurality of layers of green tape; b) filling the vias in one or more of the green tape layers from (a); c) printing over at least one surface of the green tape layers from step (b) with at least one patterned layer of a thick film composition consisting essentially of:  wherein the total inorganic binder is in the range of 0.6 wt. % to about 2 wt. % of the total composition, d) laminating the printed green tape layers from step (d) to form an assemblage comprising a plurality of unfired interconnected functional layers separated by unfired green tape; and e) cofiring the assemblage from step (d).