Integration and high-frequency characterization of PWB-compatible pure barium titanate films synthesized by modified hydrothermal techniques (< 100/spl deg/C)

TLDR: In this paper, the authors reported synthesis of pure Barium Titanate films on printed Wiring Board at temperatures less than 10v C using hydrothermal synthesis technique and the films were found to be crystalline with gain size of 80100 nm.

Abstract: This work reports synthesis of pure Barium Titanate films on Printed Wiring Board at temperatures less than 10v C using hydrothermal synthesis technique. The films thus synthesized were found be crystalline with gain size of 80100 nm. The film thickness was found to be 300 nm and the capacitance density was in the order of 1 pF/cm*, resulting in a dielectric constant of 400. Films grown on thiier Ti foils (42 microns) showed almost 100 % yield. High frequency dielectric properties were obtained from s-parameter measurements using a multi-line calibration approach and were found to be stable up to 8 GHz. Low-cost and low temperature synthesis and stable dielectric properties in the GHz frequencies make them ideal candidates for integral capacitor applications.