Flexible ferroelectret field-effect transistor for large-area sensor skins and microphones

• DOI: 10.1063/1.2335838
• Publication Date: 2006-08-15T22:12:54Z
• Authors: Ingrid Graz; Martin Kaltenbrunner; Christoph Keplinger; Reinhard Schwödiauer; Siegfried Bauer; Stéphanie P. Lacour; Sigurd Wagner
• Keywords: Electret

Ferroelectrets generate an electric field large enough to modulate the conductance of source-drain channel a thin-film field-effect transistor. Integrating ferroelectret with transistor produces The authors made such transistors by laminating cellular polypropylene films and amorphous silicon on polyimide substrates. They show that these ferrroelectret respond in static capacitive or dynamic piezoelectric mode. A touch sensor, pressure-activated switch, microphone are demonstrated. structure can be scaled up large-area flexible transducer arrays, as roll-up steerable compliant sensor skin.