Patent ID: 7215066
Filing Date: 2007-05-08
Classification: H01G,H01H,H01L,Y10S

Abstract:
1. A piezoelectric actuator, comprising: a first beam including a first bottom electrode, a first piezoelectric film on the first bottom electrode, and a first top electrode on the first piezoelectric film, a fixed end assigned at an end of the first beam and a connecting end assigned at another end of the first beam, the fixed end fixed on a substrate, the connecting end suspended over a free space; and a second beam including a second piezoelectric film connected to the first piezoelectric film at the connecting end, a second bottom electrode under the second piezoelectric film, and a second top electrode on the second piezoelectric film, a working end assigned at an end of the second beam opposite to another end to which the connecting end is assigned, the working end suspended over the free space; wherein a distance between centers of the fixed end and the working end is shorter than a distance from the working end to the connecting end.