| 摘要 |
The present invention is directed to a glass composition comprising, based on mole %, 15-35% MO where M is selected from BaO, CaO, MgO, PbO, SrO and mixtures thereof, 30-60% TiO2, 10-30% B2O3, 1-7% P2O5, 0-3% Li2O and 2-16% Ln2O3 where Ln is selected from the group of rare earth elements and mixtures thereof. The invention is further directed to the glass composition incorporated in a thick film composition or a castable dielectric composition comprising a dispersion of finely divided solids comprising, based on solids: (a) 30-100 wt. % the glass composition; (b) 0-50 wt. % ceramic filler; both dispersed in a solution of (c) an organic polymeric binder; and (d) a volatile organic solvent. The invention is still further directed to the castable dielectric composition used in a method of forming a high K green tape by casting a thin layer of the castable dispersion onto a flexible sheet and heating the cast layer to remove the volatile organic solvent. |
