Thin film capacitor and electronic circuit substrate having the same

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12218185
APP PUB NO 20230268125A1
SERIAL NO

18012145

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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To provide a thin film capacitor in which warpage is less likely to occur. A thin film capacitor includes: a metal foil having roughened upper and lower surfaces; a dielectric film covering the upper surface of the metal foil and having an opening through which the metal foil is partly exposed; a dielectric film covering the lower surface of the metal foil and made of a dielectric material having a thermal expansion coefficient smaller than that of the metal foil; a first electrode layer contacting the metal foil through the opening; and a second electrode layer contacting the first dielectric film without contacting the metal foil. The lower surface of the metal foil is thus covered with the dielectric film having a small thermal expansion coefficient, thereby making it possible to prevent the occurrence of warpage.

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Patent Owner(s)

  • TDK CORPORATION

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ishii, Daiki Tokyo, JP 36 60
Takahashi, Tetsuhiro Tokyo, JP 21 100
Yamashita, Yuki Tokyo, JP 64 292
Yano, Yoshihiko Tokyo, JP 72 1754
Yoshida, Kenichi Tokyo, JP 202 2251

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