TECHNOLOGY FOCUS - CERAMICS AND GLASS - Preferred Composition: The glass frit (d1) including (in weight%) lead oxide (71.8-90), silicon dioxide (4.9-12), boron trioxide (4.9-11), aluminum oxide (0-5), zinc oxide (0-5), titanium dioxide (0-5), strontium oxide (0-5), barium oxide (0-5), zirconium oxide (0-5), iron oxide (0.3-0.5), chromium oxide (0.2-0.5), cobalt oxide (0.1-0.4), and/or manganese dioxide (0.3-0.5), silver oxide (AgO), silver oxide (Ag2O), calcium carbonate, or barium carbonate. The content of glass frit (d) is 40-60 parts weight with respect to 100 parts weight of the glass frit. The content of glass frit (d1) is 40-60 parts weight with respect to 100 parts weight of the glass frit.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Properties: The primary particle diameter of silver powder (a) is 1.2-2 mu m. The secondary particle diameter of silver powder (b) is 1.5-2.5 mu m. The tertiary particle diameter of the silver powder (c) is 5-7 mu m. Preferred Composition: The content of primary silver powder is 49.68-56.57 parts weight with respect to 100 parts weight of the paste composition. The content of secondary silver powder is 11.9-16.22 parts weight with respect to 100 parts weight of the paste composition. The content of tertiary silver powder is 12.31-19.85 parts weight with respect to 100 parts weight of the paste composition. The paste composition further contains glass frit (d1), and organic vehicle (e1) having binder. The glass frit (d1) contains 0.1-3 wt.% of silver oxide (AgO), silver oxide (Ag2O), calcium carbonate, and barium carbonate.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition:. The content of organic vehicle (e) is 35-55 parts weight with respect to 100 parts weight of organic vehicle. The content of organic vehicle (e1) is 55-65 parts weight with respect to 100 parts weight of organic vehicle. The content of organic vehicle (e) is 3.5-5.5 parts weight with respect to 100 parts weight of the paste composition. The content of organic vehicle (e1) is 5.5-6.5 parts weight with respect to 100 parts weight of the paste composition. Preferred Property: The molecular weight of the organic vehicle (e) is less than the molecular weight of organic vehicle (e1).