PIEZOELECTRIC VIBRATION PIECE, PIEZOELECTRIC VIBRATOR, AND METHOD OF MANUFACTURING PIEZOELECTRIC VIBRATION PIECE

摘要

PROBLEM TO BE SOLVED: To provide a piezoelectric vibration piece with excellent vibration characteristics.SOLUTION: A piezoelectric vibration piece 10 is formed by an AT cut and has a first principal face 31 and a second principal face 33 as well as a first side face 41, a second side face 43, a third side face and a fourth side face. The first principal face 31 and the second principal face 33 are flat surfaces. The first side face 41 is formed as a curved surface connecting to the second principal face 33 at a connection part 33a. The second side face 43 is formed as a curved surface connecting to the first principal face 31 at a connection part 31a. The third side face comprises a first partial side face connecting to the first principal face 31, and a second partial side face connecting to the second principal face 33. The fourth side face comprises a first partial side face connecting to the first principal face 31, and a second partial side face connecting to the second principal face 33.