| abstract |
The present invention provides a kind of only can be formed selectively the ceramic electronic components and its manufacturing method of coated film on ceramic component surface.Rheostat (10) has：Ceramic component (1) and set on ceramic component (1) surface coated film (8) and external electrode (6a, 6b).By assigning the resinous solution of anionic property ion at least one kind of in sulfur acid, sulfonic acid, carboxylic acid, phosphoric acid, phosphonic acids, hydrofluoric acid to rheostat (10), and coated film (8) is formed selectively in the ceramic surface of ceramic component (1).Coated film (8) is formed by the resin of at least one kind of anionic property ion in sulfur acid, sulfonic acid, carboxylic acid, phosphoric acid, phosphonic acids, hydrofluoric acid. |