DEVICE USING A PIEZOELECTRIC ELEMENT AND METHOD FOR MANUFACTURING THE SAME

An inkjet printing head includes a piezoelectric element having a lower electrode, a piezoelectric film formed above the lower electrode, and an upper electrode formed above the piezoelectric film, a hydrogen barrier film covering an entirety of a side surface of the upper electrode and the piezoele...

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Bibliographische Detailangaben
Hauptverfasser: DATE, Tomohiro, FUJIMORI, Yoshikazu
Format: Patent
Sprache:eng
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Beschreibung
Zusammenfassung:An inkjet printing head includes a piezoelectric element having a lower electrode, a piezoelectric film formed above the lower electrode, and an upper electrode formed above the piezoelectric film, a hydrogen barrier film covering an entirety of a side surface of the upper electrode and the piezoelectric film, and an interlayer insulating film that has an opening at an upper surface center of the upper electrode, is laminated on the hydrogen barrier film, and faces the entirety of the side surface of the upper electrode and the piezoelectric film across the hydrogen barrier film.