Piezoelectric element, electronic percussion instrument, and method for manufacturing piezoelectric element and electronic percussion instrument

Abstract

A piezoelectric element, an electronic percussion instrument, and a method for manufacturing a piezoelectric element and an electronic percussion instrument are capable of suppressing a decrease in detection sensitivity of striking. A protective film covers an upper electrode of a piezoelectric element and is formed using a material capable of suppressing gas permeation (for example, a resin material such as rosin), so that contact between gas surrounding the upper electrode and the upper electrode can be blocked by the protective film. As a result, even in the case where a cover covering the piezoelectric element is made of rubber, reaction between sulfur volatilized from the cover and silver contained in the upper electrode can be suppressed, so that deterioration of the upper electrode can be suppressed. Therefore, a decrease in sensitivity of the piezoelectric element to striking on a frame can be suppressed.

Dependencies are inferred from the claim text.