High dielectric constant Hf-Sn-Ti-O thin films

L. F. Schneemeyer, R. B. Van Dover, R. M. Fleming

Research output: Contribution to journalArticlepeer-review

57 Scopus citations


High dielectric constant Hf-Sn-Ti-O thin-film materials were identified using a compositional-spread approach. Thin films of composition Hf0.2Sn0.05Ti0.75O2 prepared at 250°C have excellent dielectric properties: 40-70-nm-thick films with a dielectric constant of 40-60 were obtained, depending on the processing conditions, yielding a specific capacitance of 9-17 fF/μm2. Breakdown fields were measured to be about 3-4 MV/cm, yielding a figure of merit ∈∈0Ebr ∼19 μC/cm2. Leakage currents, measured at 1 MV/cm, were in the range 10-7 - 10-6 A/cm2.

Original languageEnglish
Pages (from-to)1967-1969
Number of pages3
JournalApplied Physics Letters
Issue number13
StatePublished - 27 Sep 1999


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