PURPOSE: To pull out easily an electrode with high accuracy by forming an electrode pattern at the part of a substrate which is not covered with a vibrator after connecting electrically the vibrator to a part of the substrate having a conductive layer and cutting/dividing the vibrator by each element.

CONSTITUTION: A substrate 2 is so constituted as to form a copper foil 4 as a conductive layer on a non-conductive board 3. A piezoelectric ceramic 1 is connected electrically to one end of the substrate 2 by means of soldering. Since no electrode segmented by each element is formed on the substrate at this time, the soldering heat will not deteriorate the pulling-out dimensional accuracy of the electrodes. Then the part of the substrate 2 which is not covered with the piezoelectric ceramic 1 is chemically treated to form an electric pattern 5. After that, the piezoelectric ceramic 1 jointed onto the substrate 2 is cut/divided by each element to form a divided ceramic 1A. This cutting/dividing is carried out in such a manner that each cutting position 6 is decided so that each electrode pattern 5 formed beforehand will match to each divided ceramic 1A, and simultaneously the copper foil 4 corresponding to each cutting position 6 is cut and divided.