Patent ID: 7651199
Filing Date: 2010-01-26
Classification: B41J,H01L

Abstract:
1. A piezoelectric element, comprising: a lower electrode; a piezoelectric layer; and an upper electrode, wherein a proportion of a peak diffraction intensity of a (100) plane present in a surface of the piezoelectric layer at the upper electrode side to a sum of peak diffraction intensities of (100), (110) and (111) planes present in the same surface is not less than 70%, wherein a proportion of a sum of peak diffraction intensities of (100), (110) and (210) planes present in a vertical surface orthogonal to the surface of the piezoelectric layer at the upper electrode side to a sum of peak diffraction intensities (100), (110), (210), (111) and (211) planes present in the same vertical surface is not less than 80%, wherein a proportion of a peak diffraction intensity of (100) planes of a first type is not less than 10% of a sum of peaks diffraction intensity of (100) planes of a second type and the (100) planes of the first type, and wherein the (100) planes of the first type are planes present in the vertical surface orthogonal to the surface of the piezoelectric layer at the upper electrode side, and the (100) planes of the second type are planes present in a surface at a predetermined angle to the vertical surface orthogonal to the face surface of the piezoelectric layer at the upper electrode side.