| 摘要 |
PURPOSE:To eliminate the defective bonding of a lead and the defective formation of an external electrode at a corner part as in the case of a conventional leadless structure and to enhance the reliability and mass productivity of a device by a method wherein an electrode is extracted from the inside to both edge faces of the device by using a conductive material formed inside a via hole. CONSTITUTION:More than one laminar electrostrictive material 1 is deposited by alternately laying internal electrode materials 2 in between; the internal electrode materials 2 are connected electrically every other layer. At this electrostrictive effect device, the following are provided: via holes where conductive materials 2a installed at electrostrictive materials 1a at outermost layers are buried; terminal electrodes 4d which are connected electrically to the internal electrode materials 2 via the conductive materials 2a which are installed on the outer surface of the electrostrictive materials 1a at the outermost layers and which are buried in said via holes. As said electrostrictive materials 1, e.g., electrostrictive sheets whose layer thickness is about 100 mum are to be used after they have been formed by a slip casting film-formation method or the like where a small amount of organic binder is added to a preliminarily baked powder of an electrostrictive material composed mainly of nickel and lead niobate and the sheets are formed by the slip where the mixture is dispersed in an organic solvent. |
