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Patent Searching and Data


Title:
STACKED SEMICONDUCTOR CERAMIC CAPACITOR WITH VARISTOR FUNCTION
Document Type and Number:
WIPO Patent Application WO/2016/006510
Kind Code:
A1
Abstract:
The present invention is provided with: a component element (1) obtained by alternately stacking semiconductor ceramic layers (3) formed from an SrTiO3-based grain boundary insulated semiconductor ceramic, and internal electrode layers (4a, 4b); and external electrodes (2a, 2b) which are electrically connected, at both ends of the component element (1), to the internal electrode layers (4a, 4b). The internal electrode layers (4a, 4b) are provided with lead-out sections (7, 8) which are lead out to one end surface (5) or another end surface (6) of the component element (1). The interval (a) between end surfaces (9, 10) of the internal electrode layers (4a, 4b) and the end surfaces (5, 6) of the component element (1), the interval (b) between side surfaces (13, 14) of the internal electrode layers (4a, 4b) and side surfaces (15, 16) of the component element (1), and the thickness (t) of each of the semiconductor ceramic layers (3) satisfy the relationships 2≤a/t≤10 and 2≤b/t≤5. Accordingly, a stacked semiconductor ceramic capacitor with varistor function is achieved which exhibits excellent reliability, is capable of inhibiting a reduction in insulation properties even if ESD repeatedly occurs, and is capable of ensuring desired electrical characteristics.

Inventors:
KAWAMOTO Mitsutoshi (10-1, Higashikotari 1-chome, Nagaokakyo-sh, Kyoto 55, 〒6178555, JP)
Application Number:
JP2015/068974
Publication Date:
January 14, 2016
Filing Date:
July 01, 2015
Export Citation:
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Assignee:
MURATA MANUFACTURING CO., LTD. (10-1, Higashikotari 1-chomeNagaokakyo-sh, Kyoto 55, 〒6178555, JP)
International Classes:
H01G4/12; H01G4/30
Domestic Patent References:
WO2012176714A12012-12-27
Foreign References:
JP2005303160A2005-10-27
Attorney, Agent or Firm:
KUNIHIRO Yasutoshi (10F Shinosaka Toyota Bldg, 14-10 Nishinakajima 5-chome, Yodogawa-ku, Osaka-sh, Osaka 11, 〒5320011, JP)
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