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A Study on the Oxidation State of Bi-layered Anodized Films

Tsuyoshi DOBASHI, Toshiji UMEZAWA, Katsutaka SASAKI, Atsushi NOYA

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Summary :

We have studied the oxidation state of Al/Hf and Ta/Hf bi-layered films by AES/XPS analysis. The anion transport process through the upper oxidized layer which is oxygen supply medium for Hf oxidation is examined. It is found that the oxidation reaction of Hf occurring with sufficient anion transport through the upper oxidized layer corresponds to the excellent properties as capacitors.

Publication
IEICE TRANSACTIONS on Electronics Vol.E74-C No.10 pp.3357-3359
Publication Date
1991/10/25
Publicized
Online ISSN
DOI
Type of Manuscript
LETTER
Category
Materials

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