Luminescent low temperature co-fired ceramics for high power LED package

Abstract

A kind of luminescent low temperature co-fired ceramics (LTCC) for high power LED package was developed. CBS (CaOB2O3SiO2) glass-ceramic doped with Eu3+, Bi3+ was prepared by sol–gel process and its sintered bodies were characterized by fluorescence spectrophotometer, X-ray diffraction (XRD), scanning electron microscopy (SEM). It is found that the optimal sintering temperature for this glass-ceramic is 875°C, and the major phases of this material are CaSiO3, CaB2O4 and SiO2. The glass-ceramic possesses good yellow-red emission under 395 and 465nm excitation, excellent dielectric properties: ɛr=3.94, tanδ<0.002 at 1MHz. Thus, this material is supposed to be used as the LTCC substrate material for the application in white LED packaging.