Patent ID: 7732990

Claim:
A piezoelectric driven MEMS device, comprising: a substrate; a first actuator which has a first fixed end fixed at least at one end to the substrate, which comprises a first lower electrode, a first piezoelectric film formed on the first lower electrode, and a first upper electrode formed on the first piezoelectric film, and which can be operated by applying voltages to the first lower electrode and the first upper electrode; a second actuator which has a second fixed end fixed at least at one end to the substrate, which is disposed in parallel with the first actuator, which comprises a second lower electrode, a second piezoelectric film formed on the second lower electrode, and a second upper electrode formed on the second piezoelectric film, and which can be operated by applying voltages to the second lower electrode and the second upper electrode; an electric circuit element having a first action part connected to the first actuator and a second action part connected to the second actuator; the first action part comprises a plurality of first comb teeth which are provided on a side part of the first actuator so as to be adjacent to the second actuator and which extend toward the second actuator, and each of the first comb teeth comprises a third lower electrode, a third piezoelectric film formed on the third lower electrode, and a third upper electrode formed on the third piezoelectric film, and the second action part comprises a plurality of second comb teeth which are provided on a side part of the second actuator so as to be adjacent to the first actuator, which extend toward the first actuator and which are alternated with the first comb teeth, and each of the second comb teeth comprises a fourth lower electrode, a fourth piezoelectric film formed on the fourth lower electrode so as to become the same layer as the second piezoelectric film, and a fourth upper electrode formed on the fourth piezoelectric film.