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US 2012/0056709 A1Published application
Multilayer ptc thermistor
AssigneeTDK Corporation
InventorsTakashi KAJINO, Kazuhiko ITOH, Teiichi TANAKA, Atsushi HITOMI, Takashi OTA
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Abstract
A multilayer PTC thermistor 100 includes a ceramic body 10 having a plurality of ceramic layers 12 and internal electrodes 14 between adjacent ceramic layers 12, external electrodes 30 on the end faces 10a, 10b of the ceramic body 10, and a glass layer 20 on the surfaces 10c, 10d of the ceramic body 10, the glass layer 20 containing an oxide of at least one element selected from the group consisting of zinc and bismuth as the major component, wherein the alkali oxide content of the glass layer is no greater than 0.8 mass %.
Claims10
A multilayer PTC thermistor comprising:
- a ceramic body comprising a plurality of ceramic layers and internal electrodes between adjacent ceramic layers;
- external electrodes on the end faces of the ceramic body;
- and
- a glass layer on the surface of the ceramic body, the glass layer containing an oxide of at least one element selected from the group consisting of zinc and bismuth as the major component,
- wherein the alkali oxide content of the glass layer is no greater than 0.8 mass %.
2 more elements
Dependencies are inferred from the claim text.