Patent ID: 8896187
Filing Date: 2014-11-25
Classification: H01L

Abstract:
1. A piezoelectric film having an alkali niobate-based perovskite structure expressed by a general formula (Na x K y Li z )NbO 3 (0≦x≦1, 0≦y≦1, 0≦z≦0.2, x+y+z=1), wherein the alkali niobate has a crystal structure of a pseudo-cubic crystal, a tetragonal crystal, an orthorhombic crystal, a monoclinic crystal, a rhombohedral crystal, or has a crystal structure of coexistence of them, and when total of K—O bonding and K-Metal bonding is set as 100% in a binding state around K-atom of the alkali niobate, a K—O bonding ratio is 46.5% or more and a K-Metal bonding ratio is 53.5% or less, wherein the Metal indicates a metal atom included in the piezoelectric film.