J. Korean Ceram. Soc. > Volume 51(3); 2014 > Article
 Journal of the Korean Ceramic Society 2014;51(3): 190. doi: https://doi.org/10.4191/kcers.2014.51.3.190
 Effects of Roll-to-Roll Sputtering Conditions on the Properties of Flexible TiO2 Films Sang-Shik Park School of Nano Materials Engineering, Kyungpook National University ABSTRACT Flexible $TiO_2$ films were deposited as dielectric materials for high-energy-density capacitors on polyethylene terephthalate (PET) substrates using a roll-to-roll sputtering method. Both the growth behavior and electrical properties of the flexible $TiO_2$ films were dependent on the sputtering pressure and $O_2$/Ar gas ratio during the sputtering process. All $TiO_2$ films had an amorphous structure regardless of the sputtering conditions due to the low substrate temperature. Microstructural characteristics such as the surface morphology and roughness of the films degraded with an increase in the sputtering pressure and $O_2$ gas concentration. The $TiO_2$ films deposited at a low pressure showed better electrical properties than those of films deposited at a high pressure. The $TiO_2$ films prepared at 10 mTorr exhibited a dielectric constant of approximately 90 at 1 kHz and a leakage current density of $5{sim}6{times}10^{-7}A/cm^2$ at 3 MV/cm. Key words: Flexible $TiO_2$ film, Roll-to-roll sputter, High-energy-density capacitor, Dielectric constant, Leakage current
TOOLS
Full text via DOI
CrossRef TDM
E-Mail
Share:
METRICS
 0 Crossref
 0 Scopus
 1,766 View
Editorial Office
Meorijae Bldg., Suite # 403, 76, Bangbae-ro, Seocho-gu, Seoul 06704, Korea
TEL: +82-2-584-0185   FAX: +82-2-586-4582   E-mail: ceramic@kcers.or.kr
 About |  Browse Articles |  Current Issue |  For Authors and Reviewers