Capacitor, electric circuit, circuit board, and apparatus
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsNaoya KITAMURA, Ryosuke KIKUCHI, Manabu KANOU, Hiroshi ASANO, Hisanori MASHIKO, Takehito GOTO
Life of this patent
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Abstract
A capacitor includes metallic tantalum, a solid electrolyte, and a tantalum oxide film. The tantalum oxide film is disposed between the metallic tantalum and the solid electrolyte. A first portion includes fluorine. A second portion is in contact with the first portion, the second portion being closer to the solid electrolyte than the first portion in a thickness direction of the tantalum oxide film. A fluorine concentration in the second portion is lower than a fluorine concentration in the first portion.
Claims10
A capacitor comprising:
- metallic tantalum;
- a solid electrolyte;
- and
- a tantalum oxide film disposed between the metallic tantalum and the solid electrolyte, wherein
- the tantalum oxide film includes a first portion including fluorine and a second portion in contact with the first portion, the second portion being closer to the solid electrolyte than the first portion in a thickness direction of the tantalum oxide film, and
- a fluorine concentration in the second portion is lower than a fluorine concentration in the first portion.
Dependencies are inferred from the claim text.