Piezoelectric ceramic element and portable device

Piezo-electric ceramic transducer 1 has upper piezo-electric active layer 5 and lower piezo-electric active layer 6 . Upper insulating layer 2 and lower insulating layer 3 , between which upper piezo-electric active layer 5 and lower piezo-electric active layer 6 are placed, are disposed on both sur...

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Bibliographische Detailangaben
1. Verfasser:	SASAKI YASUHIRO,ONISHI YASUHARU,TOKI NOZOMU
Format:	Patent
Sprache:	eng
Schlagworte:	DEAF-AID SETS ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY FOR PERFORMING MECHANICAL WORK IN GENERAL GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS METHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICALVIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY PERFORMING OPERATIONS PUBLIC ADDRESS SYSTEMS TRANSPORTING
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Beschreibung
Zusammenfassung:	Piezo-electric ceramic transducer 1 has upper piezo-electric active layer 5 and lower piezo-electric active layer 6 . Upper insulating layer 2 and lower insulating layer 3 , between which upper piezo-electric active layer 5 and lower piezo-electric active layer 6 are placed, are disposed on both surfaces of piezo-electric ceramic transducer 1 in a thickness direction thereof. Two electrode pads 8 and 9 are disposed on a surface of upper insulating layer 2 . Electrode pads 8 and 9 are connected with upper electrode layers 7 a and lower electrode layers 7 b via connection members 12 , and voltages are applied to upper piezo-electric active layer 5 and lower piezo-electric active layer 6 via electrode pads 8 and 9 . Insulating layers 2, 3 and 4 and piezo-electric active layers 5 and 6 are made of the same material as one another and are integrated by sintering.