High dielectric constant materials development for LTCC

As wireless systems require more functions within the package, device miniaturization will motivate a search for new dielectric materials with a range of dielectric constants (k). New dielectric materials must be coprocessed with commercially available low temperature co-fire ceramic (LTCC) tape and with silver. Ternary compounds, such as Bi 2 O 3 -ZnO-Ta 2 O 5 and Bi 2 O 3 -ZnO-Nb 2 O 5 , are interesting for high frequency filters and capacitors because of their low process temperatures, temperature stable dielectric properties, and low dielectric loss. Two primary phases have been explored which have significant dielectric property differences. The a phase has high permittivity (70