期刊
ACS APPLIED MATERIALS & INTERFACES
卷 8, 期 17, 页码 11100-11107出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsami.6b00945
关键词
amorphous aluminum oxide film; hydrated alumina; anodic oxidation; solid electrolyte; self-healing
资金
- Ministry of Science and Technology of China through 973-project [2015CB654601]
- International Science & Technology Cooperation Program of China [2013DFR50470]
- National Science Foundation of China [51272177]
Dense and nonporous amorphous aluminum oxide (AmAO) film was deposited onto platinized silicon substrate by sol-gel and spin coating technology. The evaporated aluminum film was deposited onto the AmAO film as top electrode. The hydrated AmAO film was utilized as a solid electrolyte for anodic oxidation of the aluminum electrode (Al) film under high electric field. The hydrated AmAO film was a high efficiency electrolyte, where a 45 nm thick Al film was anodized completely on a 210 nm thick hydrated AmAO film. The current-voltage (I-V) characteristics and breakdown phenomena of a dry and hydrated 210 nm thick AmAO film with a 150 nm thick Al electrode pad were studied in this work. Breakdown voltage of the dry and hydrated 210 nm thick AmAO film were 85 +/- 3 V (405 +/- 14 MV m(-1)) and 160 +/- 5 V (762 +/- 24 MV m(-1)), respectively. The breakdown voltage of the hydrated AmAO film increased about twice, owing to the self-healing behavior (anodic oxidation reaction). As an intuitive phenomenon of the self-healing behavior, priority anodic oxidation phenomena was observed in a 210 nm thick hydrated AmAO film with a 65 nm thick Al electrode pad. The results suggested that self-healing behavior (anodic oxidation reaction) was occurring nearby the defect regions of the films during I-V test. It was an effective electrical self-healing method, which would be able to extend to many other simple and complex oxide dielectrics and various composite structures.
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