Recent Advances in Integral Passives Research at Georgia Tech

摘要

This paper presents the recent status in the design, materials development, and high frequency characterization of integral passive components (such as capacitors, and inductors) targeted for DECT (1.8 GHz) and Bluetooth (2.4 GHz) applications. The substrate of interest for this research is a low-cost organic based material such as FR-4. For the first time, a maximum Q of 170 was measured for a 1.6nH inductor at 2.4GHz on an organic substrate with a self-resonance frequency of 4.6GHz within an area of 3.5mm~2. Using polymer/ceramic nanocomposites that are compatible with the FR-4 substrate, a capacitance density of ～30 nF/cm~2 has been obtained. Moreover, a capacitance density of > 500 nF/cm~2 (100 KHz) is being reported for the first time using a novel hydrothermally grown barium titanate film on titanium substrate. MOCVD grown lead free thin film dielectrics showed a capacitance value in excess of 200 nF/cm~2 at ～1 MHz. Integration of passives components on an organic platform is being pursued with different prototype test vehicles to meet Bluetooth (2.8 GHz) specifications.