Passivated transparent piezoelectric device with high transparency and high breakdown voltage

US12382835B2 · kind B2 · utility

Assignee

• Luxembourg Institute of Science & Technology (LIST) · LU

Inventors

• Emmanuel Defay · Saint-Égrève, FR
• Stéphanie Girod · Esch-sur-Alzette, LU
• Sebastjan GLINSEK · Dudelange, LU
• Aymen Mahjoub · Esch-sur-Alzette, LU

Key dates

• Filing date: Jan 22, 2021
• Grant date: Aug 5, 2025
• Expiry date: Sep 7, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10N30/878

Abstract

A piezoelectric device comprising a transparent substrate; a transparent barrier layer on the substrate; a transparent piezoelectric layer on the transparent barrier layer; a transparent layer of interdigitated electrodes on the transparent piezoelectric layer; wherein the piezoelectric device further comprises a transparent dielectric layer at least on the portion of piezoelectric layer that is between successive fingers of the transparent layer of interdigitated electrodes, the transparent dielectric layer having a refractive index lower than a refractive index of the transparent layer of interdigitated electrodes and a dielectric strength superior to 3 MV/m.