Electrical Properties of Amorphous BaTi4O9 Films Grown on Cu/Ti/SiO2/Si Substrates Using RF Magnetron Sputtering

Title
Electrical Properties of Amorphous BaTi4O9 Films Grown on Cu/Ti/SiO2/Si Substrates Using RF Magnetron Sputtering
Authors
김진성강민규권상효Guifang Han강종윤윤중락정영훈백종후남산
Issue Date
2013-04
Publisher
Journal of the American Ceramic Society
Citation
VOL 96, NO 4, 1248-1252
Abstract
Amorphous BaTi4O9 (BT4) films for use as capacitors embedded in PCB substrates were grown on Cu electrodes at low temperatures (≤ 200°C). The dielectric constant (k) of the amorphous BT4 film grown at room temperature (RT) was 38, and its dissipation factor was 3.2% at 100 kHz. A similar k value was obtained at radio-frequency ranges, with a quality factor of 143 at 1.0 GHz. The films showed a capacitance density of 200 nF/cm2, a temperature coefficient of capacitance of 296 ppm/°C at 75 kHz, and a breakdown voltage of 42.5 V. This film therefore satisfies the requirements of the International Technology Roadmap for Semiconductors for 2016 for capacitors grown on organic substrates. In addition, the leakage current mechanism of the amorphous BT4 films was found to be Schottky emission, and the Schottky barrier height was calculated as 2.26 eV.
URI
http://pubs.kist.re.kr/handle/201004/44899
ISSN
00027820
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