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Electrical properties of ferroelectric thin film capacitors with different structures

  • SUNY Buffalo

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

1 Scopus citations

Abstract

Ferroelectric BaTiO3 thin film capacitors were fabricated and using different designs. Silicon wafers with an oxide layer were used as the substrates. Conductive metallic oxide of RuO2 was reactively sputtered on SiO2/Si as a bottom electrode. The BaTiO3 thin films with a thickness in the range of 150-3--nm were deposited by RF magnetron sputtering. Different capacitor structures, including single layer amorphous, single layer polycrystalline, and bi-layer amorphous on polycrystalline, were investigated in this study. The clear interface between BaTiO3 and RuO2 as demonstrated by cross-sectional scanning electron microscopy implies little interdiffusion. The DC conductivity of a film with a thickness of around 200nm was as low as 1×10-13/Ω-cm at 4V. The dielectric constant of the composite structure was controlled in a range from 30 to 130. Breakdown voltage varied from 5×105V/cm to 1×106V/ cm.

Original languageEnglish
Title of host publicationMaterials Research Society Symposium Proceedings
EditorsJerzy Kanicki, William L. Warren, Roderick A.B. Devine, Masakiyo Matsumura
PublisherPubl by Materials Research Society
Pages523-527
Number of pages5
ISBN (Print)1558991794
StatePublished - 1993
EventProceedings of a Symposium on Amorphous Insulating Thin Films - Boston, MA, USA
Duration: Dec 1 1992Dec 4 1992

Publication series

NameMaterials Research Society Symposium Proceedings
Volume284
ISSN (Print)0272-9172

Conference

ConferenceProceedings of a Symposium on Amorphous Insulating Thin Films
CityBoston, MA, USA
Period12/1/9212/4/92

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