Patent ID: 7780878

Claim:
A structure comprising: (a) a thick film composition comprising: i) an electrically conductive silver powder, wherein the silver is selected from the group consisting of silver metal, silver alloys, silver oxide, silver salts and mixtures thereof; ii) one or more glass frits, wherein at least one of the glass frits is lead-free, wherein at least one of the one or more glass frits comprises 0.1-8 wt % SiO 2 , 8-25 wt % B 2 O 3 , and 28-85 wt % Bi 2 O 3 , based on the wt % of the total glass composition; iii) a Mg-containing additive, wherein the Mg-containing additive is selected from (a) Mg, (b) metal oxides of Mg, (c) any compounds that can generate metal oxides of Mg upon firing, and (d) mixtures thereof, dispersed in iv) an organic medium; (b) one or more insulating films; (c) one or more substrates; wherein, upon firing, the organic medium is removed and the glass frit and silver powder are sintered.