Patent ID: 8591009

Claim:
A piezoelectric film comprising: a first electrode having only a (110) orientation; a (Na x Bi 0.5 )TiO 0.5x+2.75 —BaTiO 3 layer having only a (110) orientation; a (Bi,Na)TiO 3 —BaTiO 3 layer having only a (110) orientation; and a second electrode, wherein a value of x is not less than 0.29 and not more than 0.40, and the first electrode, the (Na x Bi 0.5 )TiO 0.5x+2.75 —BaTiO 3 layer, the (Bi,Na)TiO 3 —BaTiO 3 layer, and the second electrode are laminated in this order.