Methods 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: i) electrically conductive powder; ii) an inorganic binder wherein
the inorganic binder is selected from TiO.sub.2 and any compounds that
can generate TiO.sub.2 during firing and any one of the following
compounds: Sb.sub.2O.sub.3, Co.sub.3O.sub.4, PbO, Fe.sub.2O.sub.3,
SnO.sub.2, MnO, CuO and mixtures thereof; and iii) an organic medium,
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).