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1. WO2020222639 - ACOUSTIC PIEZOELECTRIC MEMBRANE TRANSDUCER ARRAYS WITH LOCALIZED MEMBRANE VIBRATIONS

Publication Number WO/2020/222639
Publication Date 05.11.2020
International Application No. PCT/NL2020/050265
International Filing Date 29.04.2020
IPC
B06B 1/06 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
BGENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
1Processes or apparatus for generating mechanical vibrations of infrasonic, sonic or ultrasonic frequency
02making use of electrical energy
06operating with piezo-electric effect or with electrostriction
CPC
B06B 1/0622
BPERFORMING OPERATIONS; TRANSPORTING
06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, ; e.g.; FOR PERFORMING MECHANICAL WORK IN GENERAL
1Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
02making use of electrical energy
06operating with piezo-electric effect or with electrostriction
0607using multiple elements
0622on one surface
B06B 1/0688
BPERFORMING OPERATIONS; TRANSPORTING
06GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS IN GENERAL
BMETHODS OR APPARATUS FOR GENERATING OR TRANSMITTING MECHANICAL VIBRATIONS OF INFRASONIC, SONIC, OR ULTRASONIC FREQUENCY, ; e.g.; FOR PERFORMING MECHANICAL WORK IN GENERAL
1Methods or apparatus for generating mechanical vibrations of infrasonic, sonic, or ultrasonic frequency
02making use of electrical energy
06operating with piezo-electric effect or with electrostriction
0688with foil-type piezo-electric elements, e.g. PVDF
Applicants
  • NEDERLANDSE ORGANISATIE VOOR TOEGEPAST- NATUURWETENSCHAPPELIJK ONDERZOEK TNO [NL]/[NL]
Inventors
  • AKKERMAN, Hylke Broer
  • VAN BREEMEN, Albert Jos Jan Marie
  • GELINCK, Gerwin Hermanus
  • BERKHOFF, Arthur Perry
  • VAN NEER, Paul Louis Maria Joseph
  • VOLKER, Arno Willem Frederik
Agents
  • WITMANS, H.A.
Priority Data
19171943.430.04.2019EP
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) ACOUSTIC PIEZOELECTRIC MEMBRANE TRANSDUCER ARRAYS WITH LOCALIZED MEMBRANE VIBRATIONS
(FR) RÉSEAUX DE TRANSDUCTEURS À MEMBRANE PIÉZOÉLECTRIQUE ACOUSTIQUES À VIBRATIONS DE MEMBRANE LOCALISÉES
Abstract
(EN)
An acoustic device (100) comprises an array of acoustic transducers (10a,10b) formed by a patterned stack (12-15) on a flexible substrate (11). The stack comprises a piezoelectric layer (13) sandwiched between respective bottom and top electrode layers (12,15), and a patterned insulation layer (14) formed by a pattern of insulation material (14m). The pattern comprises insulated areas (A14) where the insulation material (14m) is disposed between one of the electrodes (12,15) and the piezoelectric layer (13), and contact areas (A10) without the insulation material (14m) where both electrodes (12,15) contact the piezoelectric layer (13).
(FR)
L'invention concerne un dispositif acoustique (100) qui comprend un réseau de transducteurs acoustiques (10a,10b) formés par un empilement structuré (1215) sur un substrat souple (11). L'empilement comprend une couche piézoélectrique (13) prise en sandwich entre des couches d'électrode inférieure et supérieure respectives (12,15), et une couche d'isolation sructurée (14) formée par une structure de matériau d'isolation (14m). La structure comprend des zones isolées (A14) dans lesquelles le matériau d'isolation (14m) est disposé entre l'une des électrodes (12,15) et la couche piézoélectrique (13), et des zones de contact (A10) sans le matériau d'isolation (14m) dans lesquelles les deux électrodes (12,15) entrent en contact avec la couche piézoélectrique (13).
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