Abstract:
A novellowtemperatureco-fired ceramic(LTCC)compositionconsistingof40wt%Al2O3–60 wt%BBSZ(35Bi2O3:32ZnO:27B2O3:6SiO2)
fireable at850 1C hasbeendeveloped.TheXRDstudyofthesinteredcompositeshowsthepresenceofBi24Si2O40 and ZnAl2O4 secondary
phases. Thebulksamplessinteredat900 1C hasdielectricconstant(εr) of11.3andlosstangent(tan δ) of0.001at1MHz.Tapesofthecomposite
have beencastedonMylars film andthegreentapehasasurfaceroughnessof299nmandtensilestrengthof0.1MPa.Uponsinteringthetapes
showed an εr of 10.9,tan δ of 0.009andtemperaturecoefficient ofdielectricconstant(τε) of487ppm/1C at5GHz,whicharesuitablefor
practical hybriddeviceapplications
