Thick film paste compositions for use with an aluminum nitride substrate.

摘要

A thick film paste composition adapted to be bonded onto an aluminum nitride substrate is provided which comprises (a) an electrical property regulating component present in an amount sufficient to control the electrical properties of said paste; (b) a lead free or low lead glass composition capable of bonding said electrical property regulating component to the surface of an aluminum nitride substrate, said glass composition including, in weight percent; and (c) an organic dispersion medium for said electrical regulating property component and said glass composition. A method of applying the thick film paste to an aluminum nitride substrate is also disclosed. SiO2..27.0 to 56.5; BaO..0 to 47,0; B2O3..4,5 to 25,0; PbO..0 to 18,0; ZnO..0 to 15.0; Al2O3..3,0 to 14,0; ZrO2..0 to 3,0; MgO..0 to 8,0; CaO..0 to 12,0; F2..0 to 3,0; K2O..0 to 3,0; Na2O..0-3,0; WO3..0 to 4,0; Li2O..0 to 4,0; wherein BaO + PbO >/= 15,0; ZnO + CaO + Al2O3 >/= 5,0; CaO + MgO + BaO >/= 7,0; CaO + MgO + ZrO2 >/= 1,0 ZrO2 + CaO + BaO >/= 7,0; K2O + Na2O + (PbO or BaO) >/= 10,0.