TECHNOLOGY FOCUS - CERAMICS AND GLASS - The glass frit is selected from lead-silicon (Pb-Si) glass, lead-boron (Pb-B) glass, a Pb-B-Si glass, lead-bismuth-silicon (Pb-Bi-Si) glass, lead-aluminum-silicon (Pb-Al-Si) glass, phosphate glass, lead-free Bi-Si glass, lead free Bi-B glass, lead-free Bi-B-Si glass, lead-free Bi-Al-Si glass, lead-free alkali-Si glass, lead free zinc-silicon (Zn-Si) glass, lead free alkaline earth-Si glass, and lead free Zn-B-Si glass. The glass frit has a form selected from powder, liquid glass and/or physical mixture of oxide components. The glass frit is in the form of nanopowders having an average particle size of less than 1000 (preferably less than 100, especially less than 30) nanometers.    TECHNOLOGY FOCUS - IMAGING AND COMMUNICATION - The ink is conductive and further comprises silver. The ink further comprises a phosphorus composition. The ink further comprises a transition metal other than silver, a phosphorus composition, and an etchant. The second ink layer further comprises a glass frit, and a curable polymeric resin.    TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - The silver has a form selected from powder, flakes, colloidal particles, colloidal suspensions and/or silver coated particles. The silver is in the form of a plating solution. The silver is in the form of a silver compound selected from silver chloride (AgCl), silver nitrate (AgNO3), silver sulfate (Ag2SO4), silver acetate (AgOOCCH3) and/or organometallic silver compounds. The phosphorus composition comprises at least 10 wt.% of elemental phosphorus, dry basis. The phosphorus composition comprises a phosphorus glass comprising at least 25 mole.% of phosphorus pentoxide (P2O5). The phosphorus is present as a coating on silver. The phosphorus composition comprises an organophosphorus compound selected from (R1O)3-P, (Ar1O)3-P, (R2-Ar2-O)3-P,(R3-Ar3-O)3-P, P-((R4-O)x(Ar4-O)y(R5-Ar5-O)3-(x+y)),((R6O)2-P-Ar6)2, ((Ar7O)2-P-Ar7)2, and ((R7O)2-P-R8)2, (where R1-R8 are 1-10C alkyl (optionally substituted), and Ar1-Ar10 are selected from phenyl and substituted phenyl). The phosphorus composition comprises an inorganic phosphorus compound selected from phosphoric acid (H3PO4), phosphate salts, phosphate glass, phosphine and/or phosphorus pentoxide P2O5. The groove is made by a procedure selected from laser etching, chemical etching and/or mechanical etching.    TECHNOLOGY FOCUS - METALLURGY - The transition metal other than silver is selected from nickel (Ni), iron (Fe), cobalt (Co), platinum (Pt), palladium (Pd), tungsten (W), molybdenum (Mo), gadolinium (Gd), yttrium (Y), zirconium (Zr), hafnium (Hf), titanium (Ti), lanthanum (La), tantalum (Ta), niobium (Nb), vanadium (V), iridium (Ir) and/or rhodium (Rh). The transition metal other than silver is capable of forming a suicide.