Patent ID: 9537079
Date: 2017-01-03
CPC Classifications: H01L,H03H,Y10T

Claim:
1. A piezoelectric device comprising: a support; a piezoelectric thin film located on or over the support, the piezoelectric thin film being polarized along a +Z axis and a −Z axis that are crystal axes and having a +C plane and a −C plane, the +C plane being a first main surface on a side of the +Z axis of the piezoelectric thin film, and the −C plane being a second main surface on a side of the −Z axis of the piezoelectric thin film; an electrode located on a side of the −C plane of the piezoelectric thin film, the electrode including a crystal plane parallel to the crystal plane of the piezoelectric thin film; and a stepped structure located on the side of the −C plane of the piezoelectric thin film.