Electronic device with outer electrodes and a circuit module having the electronic device
AssigneeTaiyo Yuden Co., Ltd.
InventorsToshimitsu Honda, Manabu Takayama, Takayuki Uehara
Life of this patent
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Abstract
An electronic device including a ceramic element and outer electrodes wherein each of the outer electrodes includes an undercoat layer, an intermediate metal plating layer formed on the undercoat layer and a surface layer formed by metal plating which is formed on the intermediate metal plating layer; the intermediate metal plating layer is extended beyond the edge of the periphery of the undercoat layer to a surface portion of the ceramic element; and the undercoat layer is entirely coated with the intermediate metal plating layer.
Claims19
An electronic device comprising a ceramic element and outer electrodes, wherein
- each of the outer electrodes comprises an undercoat layer, an intermediate metal plating layer comprising at least one layer formed on the undercoat layer, and a surface layer formed on the intermediate metal plating layer;
- the intermediate metal plating layer extends beyond an edge of a periphery of the undercoat layer to a surface portion of the ceramic element;
- the undercoat layer is entirely coated with the intermediate metal plating layer;
- and
- the intermediate metal plating layer extends to the surface portion of the ceramic element with a width of extension which is larger than a film thickness of the intermediate metal plating layer at a position in the edge of the periphery of the undercoat layer.
A circuit module comprising a substrate with a printed circuit, lands formed on the substrate, and an electronic device mounted on the lands, wherein
- the electronic device comprises a ceramic element and outer electrodes;
- each of the outer electrodes comprises an undercoat layer, an intermediate metal plating layer comprising at least one layer formed on the undercoat layer, and a surface layer formed on the intermediate metal plating layer;
- the intermediate metal plating layer extends beyond an edge of a periphery of the undercoat layer to a surface portion of the ceramic element;
- the undercoat layer is entirely coated with the intermediate metal plating layer;
- and
- the intermediate metal plating layer extends to the surface portion of the ceramic element with a width of extension which is larger than a film thickness of the intermediate metal plating layer at a position in the edge of the periphery of the undercoat layer.
Dependencies are inferred from the claim text.