| 摘要 |
The manufacturing method for an electroceramic component ( 1 ), for example a varistor ( 1 ), comprises a laser irradiation of a part ( 5; 6 ) of the surface of an electroceramic body ( 2 ) before a metallization ( 3; 4 ) is applied to the part ( 5; 6 ) of the surface. By means of the laser irradiation it is possible to produce a micro-roughness and/or a chemical modification of the surface which permits good adhesion of the metallization, and it is possible to reduce or eliminate areas of unevenness or waviness of that part ( 5; 6 ) of the surface of the electroceramic body ( 2 ) which is to be metallized. In addition, improved transverse conductivity can be produced, by virtue of which a low contact resistance and a very homogeneous current distribution is achieved, in particular near to the metallization ( 3; 4 ). In addition it is possible to remove residues which originate in particular from a sinter support or from the application of a passivation layer. After the laser irradiation, the electroceramic body advantageously has a border ( 9 ) which adjoins the part ( 5; 6 ) of the surface and which is not laser-irradiated. The laser beam can advantageously be pulsed and focused.
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