Capacitor, electrical circuit, circuit board, device, and method for manufacturing capacitor
AssigneePanasonic Intellectual Property Management Co., Ltd.
InventorsHisanori MASHIKO, Naoya KITAMURA, Hiroshi ASANO, Manabu KANOU, Ryosuke KIKUCHI
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Abstract
A capacitor includes metallic tantalum and a dielectric layer. The dielectric layer covers the metallic tantalum and includes a tantalum oxide. The dielectric layer includes fluorine and phosphorus. The dielectric layer includes, for example, a first portion and a second portion. The first portion is a portion separated from the metallic tantalum in a thickness direction of the dielectric layer. The second portion is a portion in contact with the metallic tantalum in the thickness direction of the dielectric layer.
Claims12
A capacitor comprising:
- metallic tantalum;
- and
- a dielectric layer covering the metallic tantalum and including a tantalum oxide, wherein
- the dielectric layer includes fluorine and phosphorus.
A capacitor manufacturing method comprising:
- bringing a solution into contact with metallic tantalum or a tantalum oxide covering the metallic tantalum, the solution containing a fluoride including a fluoride ion and a pH buffering agent;
- and
- forming a dielectric layer covering the metallic tantalum by anodic oxidation with the metallic tantalum or the tantalum oxide in contact with the solution.
Dependencies are inferred from the claim text.