Stacked electronic part and method of manufacturing the same
Provided are a stacked electronic part that can sufficiently suppress plating deposition on the surface of a porous green body when a terminal electrode is formed on an external electrode, thereby enabling a decrease in the reliability of products to be prevented, and a method of manufacturing the stacked electronic part. The stacked electronic part 1 is a PTC thermistor having a stacked body 4 containing a porous green body 2 made of ceramics and having a plurality of vacancies and a plurality of internal electrodes 3 formed within the porous green body 2, and is provided with at least one unit structure 10 in which the porous green body 2 and the internal electrode 3 are stacked. External electrodes 5, 5 are connected to the internal electrode 2, and upon the external electrodes 5, 5 are formed terminal electrodes 7, 7 by plating. Resin is filled in the plurality of vacancies of the porous green body 2 at a filling ratio of not less than 60%.
1. A stacked electronic part, comprising:
a stacked body that has a porous green body made mainly of ceramics and containing a plurality of vacancies and at least one internal electrode provided within the porous green body;
an external electrode connected to the internal electrode; and
a terminal electrode formed on the external electrode by plating,
wherein the porous green body is such that addition polymerization type silicone resin is filled in the plurality of vacancies at a filling ratio of not less than 60%.
2. The stacked electronic part according to claim 1 , wherein the porous green body is a burned body and has a sintered density of not more than 90%.
3. A method of manufacturing a stacked electronic part, comprising the steps of:
forming a stacked structure by providing at least one internal electrode within a porous green body made mainly of ceramics and containing a plurality of vacancies;
forming a stacked body by burning the stacked structure;
applying an electrically conductive paste to the stacked body so as to obtain an electrical connection to the internal electrode of the stacked body;
forming an external electrode by burning the electrically conductive paste;
filling addition polymerization type silicone resin in the plurality of vacancies at a filling ratio of not less than 60% by impregnating the addition polymerization type silicone resin in the porous green body; and
forming a terminal electrode on the external electrode by plating.