Patent ID: 8866492
Filing Date: 2014-10-21
Classification: G01R,H01H,H01L

Abstract:
1. A manufacturing method comprising: first insulating layer deposition of depositing a first insulating layer on a substrate using an insulating material; first annealing of annealing the first insulating layer; first electrode layer deposition of depositing a first electrode layer on the first insulating layer using a conductive material; first piezoelectric film deposition of depositing a first piezoelectric film on the first electrode layer by applying a sol-gel material on the first electrode layer and annealing the sol-gel material; second electrode layer deposition of depositing a second electrode layer on the first piezoelectric film using a conductive material; second insulating layer deposition of depositing a second insulating layer on the second electrode layer using an insulating material; and second annealing of annealing the second insulating layer, wherein the first electrode layer is provided between the first insulating layer and the first piezoelectric film, and the second electrode layer is provided between the first piezoelectric film and the second insulating layer, and the first annealing and the second annealing are each performed with an annealing time greater than or equal to an annealing time of the annealing performed during the first piezoelectric film deposition and with a temperature gradient less than or equal to a temperature gradient of the annealing performed during the first piezoelectric film deposition.