Process for fabricating piezoelectric element

Abstract

In a production method of a piezoelectric element, an unneeded electric field is prevented from being applied to a piezoelectric thin film layer during the production process, resulting in a high performance piezoelectric element production method. The production method includes a first process for depositing an under electrode layer, a piezoelectric thin film layer and an upper electrode layer successively on a substrate such that the under electrode layer and the upper electrode layer form a short-circuit, a second process, after the first process, for etching including dry etching, the second process commenced while the under electrode layer and the upper electrode layer are short-circuited, a third process, after the second process, for polarizing by applying a voltage across the under electrode layer and the upper electrode layer, a fourth process, after the third process, for individualizing each piezoelectric element.

Dependencies are inferred from the claim text.