PIEZOELECTRIC STRAIN SENSOR, ITS MANUFACTURING METHOD, AND ELECTRONIC APPARATUS USING THE PIEZOELECTRIC STRAIN SENSOR

摘要

PROBLEM TO BE SOLVED: To provide a piezoelectric strain sensor and an electronic apparatus using it capable of reducing the influence of a vertical vibration mode resulting from the polarization direction of a piezoelectric ceramic around first and second electrodes for precisely detecting strain of a detected object. SOLUTION: This piezoelectric strain sensor is provided with the piezoelectric ceramic 11, the first electrode 12a arranged on the front face of the piezoelectric ceramic 11, the second electrode 12b arranged from the front face of the piezoelectric ceramic 11 to reach its back face. The piezoelectric ceramic 11 between the first electrode 12a and the second electrode 12b has a groove 13.