Patent ID: 8819903
Filing Date: 2014-09-02
Classification: B41J,H01L,Y10T

Abstract:
1. A manufacturing method of a piezoelectric element which has a longitudinal direction and a piezoelectric layer interposed by two electrodes comprising: forming a first conductive layer upon a substrate; forming the piezoelectric layer upon the substrate and the first conductive layer; forming a contact hole through piezoelectric layer on the first conductive layer forming a second conductive layer upon the piezoelectric layer and a first wiring layer in the contact hole; forming a third conductive layer upon the second conductive layer and a second wiring layer which is connected to the first wiring layer and led out of the contact hole; forming a first portion which is located at one end in the longitudinal direction of the second conductive layer, a second portion which is located at the other end in the longitudinal direction of the second conductive layer, and an opening portion provided between the first portion and the second portion by patterning the third conductive layer; forming a resist layer that covers the opening portion and covers the edges of the first portion and the second portion that face the opening portion side; and forming a first conductive portion and a second conductive portion configured from the first portion and the second portion, and a third conductive portion configured from the second conductive layer, by dry-etching the second conductive layer using the first portion, the second portion, and the resist layer as a mask.