LEAD FREE LTCC TAPE COMPOSITION

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A glass composition consisting essentially of, based on mole percent, 46-56% B2O3, 0.5-8.5% P2O5, SiO2 and mixtures thereof, 20-50% CaO, 2-15% Ln2O3 where Ln is selected from the group consisting of rare earth elements and mixtures thereof; 0-6% M′2O where M′ is selected from the group consisting of alkali elements; and 0-10% Al2O3, with the proviso that the composition is water millable.