| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a cylindrical piezoelectric element, and a cylindrical piezoelectric element which implement a compact size without requiring higher machining difficulty. <P>SOLUTION: The cylindrical piezoelectric element manufacturing method includes: forming a reference electrode 5-21 on an inner circumferential surface of a cylindrical piezoelectric material; forming a plurality of driving electrodes 5-1, 5-2 circumferentially having a predetermined width and axially extending from one end to the other end on an outer circumferential surface of the cylindrical piezoelectric material; forming a polarizing electrode 5-11 axially in series with and in electrical conduction with the plurality of driving electrodes 5-1, 5-2 in a region of the outer circumferential surface of the cylindrical piezoelectric material near the one axial end of the cylindrical piezoelectric material; applying a predetermined voltage between the polarizing electrode 5-11 and the reference electrode 5-21 to polarize regions of the cylindrical piezoelectric material corresponding to the plurality of driving electrodes 5-1, 5-2; and removing the polarizing electrode 5-11 of the cylindrical piezoelectric material. <P>COPYRIGHT: (C)2013,JPO&INPIT |
