Patent attributes
Internal electrode layers (5) include a common electrode layer (3) and feed electrode layers (6) alternately placed in a stacking direction with piezoelectric layers (1) interposed between the common electrode layer (3) and the feed electrode layers (6). The common electrode layer (3) has a common electrode (3a). The feed electrode layers (6) include a first feed electrode layer (6a) and a second feed electrode layer (6b). The first feed electrode layer (6) has four divided electrodes (2a through 2d) and a first connection electrode (2e) for providing connection between two of the divided electrodes (2b, 2d). The second feed electrode layer (6) has four divided electrodes (4a through 4d) and a second connection electrode (4e) for providing connection between two of the divided electrodes (4a, 4c). The first and second connection electrodes (2e, 4e) are formed on parts of longitudinally middle parts of the associated piezoelectric layers (1) except both transverse end parts of the associated piezoelectric layers (1), respectively. The common electrode (3a) is connected to an external electrode (7g). The two divided electrodes (2b, 2d) of the first feed electrode layer (6a) are connected through external electrodes (7b, 7d) to the two divided electrodes (4b, 4d) of the second electrode layer (6b). The other divided electrodes (2a, 2c) of the first feed electrode layer (6a) are connected through external electrodes (7a, 7c) to the other divided electrodes (4a, 4c) of the second electrode layer (6b).
