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US 2009/0290281 A1Published application
Multilayer ceramic capacitor and method for manufacturing the same
AssigneeMurata Manufacturing Co., Ltd.
InventorsToshiki Nagamoto, Mitsuhiro Kusano
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Abstract
A multilayer ceramic capacitor having external electrodes. Each of the external electrodes has a lower layer resistance electrode and an upper layer conductive electrode. A glass contained in the upper layer conductive electrode has a softening point higher than that of a glass contained in the lower layer resistance electrode by 20° C. or more.
Claims13
A multilayer ceramic capacitor comprising:
- a ceramic laminate;
- a plurality of internal electrodes in the ceramic laminate;
- and
- external electrodes formed on at least one outer surface of the ceramic laminate, the external electrodes being electrically connected to different respective internal electrodes of the plurality of internal electrodes,
- wherein the external electrodes each have a lower layer resistance electrode and an upper layer conductive electrode on the lower layer resistance electrode, and
- the lower layer resistance electrode contains a first glass, the upper layer conductive electrode contains a second glass, the second glass having a softening point higher than a softening point of the first glass by 20° C. or more.
3 more elements
A method for manufacturing a multilayer ceramic capacitor, the method comprising:
- forming a ceramic laminate in which a plurality of ceramic layers are laminated to each other and in which a plurality of internal electrodes are formed along specific interfaces between the plurality of ceramic layers;
- and
- forming external electrodes on at least one outer surface of the ceramic laminate so as to be electrically connected to different respective internal electrodes of the plurality of internal electrodes,
- wherein the step of forming the external electrodes includes:
- forming lower layer resistance electrodes containing a first glass by firing;
- and
- forming upper layer conductive electrodes containing a second glass on the lower layer resistance electrodes by firing,
- the second glass having a softening point higher than a softening point of the first glass by 20° C. or more, and
- a firing temperature for forming the upper layer conductive electrodes is lower than a firing temperature for forming the lower layer resistance electrodes.
6 more elements
Dependencies are inferred from the claim text.