PIEZOELECTRIC ELEMENT

• Main Author: ASHIKAGA KINYA
• Format: Patent
• Language: English; Japanese
• Published: 14.06.2018
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; PUBLIC ADDRESS SYSTEMS

PROBLEM TO BE SOLVED: To provide a piezoelectric element of a novel structure.SOLUTION: A piezoelectric element 4 includes: a first electrode 11; a first piezoelectric film 12 formed on one surface of the first electrode 11; a second electrode 14 arranged on a surface of the first piezoelectric film 12 opposite to the first electrode 11 side; a second piezoelectric film 15 formed on a surface of the second electrode 14 opposite to the first piezoelectric film 12 side and made of a material different from that of the first piezoelectric film 12; and a third electrode 16 formed on the second piezoelectric film 15.SELECTED DRAWING: Figure 2 【課題】新規な構造の圧電素子を提供する。【解決手段】圧電素子４は、第１電極１１と、第１電極の一方の表面に形成された第１圧電体膜１２と、第１圧電体膜１２における第１電極１１側とは反対側の表面上に配置された第２電極１４と、第２電極１４における第１圧電体膜１２側とは反対側の表面に形成され、第１圧電体膜１２とは異なる材料からなる第２圧電体膜１５と、第２圧電体膜１５上に形成された第３電極１６とを含む。【選択図】図２