Compositions: ceramic – Ceramic compositions – Glass compositions – compositions containing glass other than...
Patent
1999-10-22
2000-11-14
Marcantoni, Paul
Compositions: ceramic
Ceramic compositions
Glass compositions, compositions containing glass other than...
501 52, C03C 315
Patent
active
061470198
ABSTRACT:
A glass composition comprising, based on mole %, 50-67% B.sub.2 O.sub.3 ; 20-50% M.sup.II O where M.sup.II is selected from the group consisting of alkaline earth elements; 2-15% Ln.sub.2 O.sub.3 where Ln is selected from the group consisting of rare earth elements and further comprising, based on mole %, 0-6% M.sup.I.sub.2 O where M.sup.I is selected from the group consisting of alkali elements and 0-10% Al.sub.2 O. The glass composition incorporated into a castable dielectric composition comprising a dispersion of finely divided solids comprising, based on solids: (a) 25-50 wt. % the glass composition; (b) 50-75 wt % refractory oxide; both dispersed in a solution of (c) an organic polymeric binder; and (d) a volatile organic solvent. The castable dielectric composition used in a method of forming a low loss green tape by casting a thin layer of the dispersion onto a flexible substrate and heating the cast layer to remove the volatile organic solvent.
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Abstract For Paper: 98 MCM International Conference and Exhibition On Multichip Modules and Density Packaging, Apr. 4, 1998.
E. I. Du Pont de Nemours and Company
Marcantoni Paul
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