Low-temperature, low-dielectric, crystallizable glass composite

A low k crystallizable glass composite containing borosilicate glass and cordierite glass has been developed. Crystallization and densification of cordierite glass is enhanced with borosilicate glass present. For the compositions identified, a high sintered density greater than 95% can be obtained at 825-900/spl deg/C. The crystallizable glass composite has a dielectric constant of 5.3 and a dielectric loss less than 0.3% at 1 MHz, and a tunable thermal expansion coefficient of 3.9-4.5/spl times/10/sup -6/ K/sup -1/ in the temperature range of 20-200/spl deg/C by controlling heat treatment.<
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