EP 0587032 A1 19940316 - Integrated capacitive transducer.
Title (en)
Integrated capacitive transducer.
Title (de)
Intergrierter kapazitiver Wandler.
Title (fr)
Transducteur capacitif intégré.
Publication
Application
Priority
FR 9210947 A 19920911
Abstract (en)
The invention relates to an integrated capacitive transducer (1) comprising: - a membrane including a movable part (4) equipped with an electrode, - a fixed plate (6) including a counter-electrode (8), - a structure (10) for supporting the electrode and the counter-electrode, the said fixed plate (6) further including an electret (30) which extends opposite the said movable part (4) and is separated from the said membrane by an open space (16), the said transducer being characterised in that the said electret (30) includes a first electrically conducting layer (32) embedded in an insulating material (34, 36). The invention applies particularly to hearing aids. <IMAGE>
Abstract (fr)
L'invention concerne un transducteur capacitif intégré (1) comprenant: une membrane comportant une partie mobile (4) munie d'une électrode, une plaque fixe (6) comportant une contre-électrode (8), une structure de support (10) de l'électrode et de la contre-électrode, ladite plaque fixe (6) comportant en outre un électret (30) qui s'étend en regard de ladite partie mobile (4) et est séparée de ladite membrane par un espace ouvert (16), ledit transducteur étant caractérisé en ce que ledit électret (30) comporte une première couche électriquement conductrice (32) noyée dans un matériau isolant (34, 36). L'invention s'applique particulièrement aux prothèses auditives. <IMAGE>
IPC 1-7
IPC 8 full level
H01L 41/08 (2006.01); H04R 19/00 (2006.01); H04R 19/01 (2006.01); H04R 19/04 (2006.01); H04R 25/00 (2006.01)
CPC (source: EP US)
H04R 19/005 (2013.01 - EP US); H04R 19/016 (2013.01 - EP US); H04R 25/00 (2013.01 - EP US); H04R 25/604 (2013.01 - EP US)
Citation (search report)
- [A] US 4524247 A 19850618 - LINDENBERGER W STEWART [US], et al
- [A] WO 8500495 A1 19850131 - AMERICAN TELEPHONE & TELEGRAPH [US]
- [A] GB 2212026 A 19890712 - MICROTEL BV [NL]
- [A] WO 8301362 A1 19830414 - ERICSSON TELEFON AB L M [SE]
- [A] US 4993072 A 19910212 - MURPHY PRESTON V [CH]
Designated contracting state (EPC)
CH DE DK FR GB LI NL
DOCDB simple family (publication)
EP 0587032 A1 19940316; EP 0587032 B1 19980408; DE 69317833 D1 19980514; DE 69317833 T2 19981112; DK 0587032 T3 19990208; FR 2695787 A1 19940318; FR 2695787 B1 19941110; JP H06217397 A 19940805; US 5677965 A 19971014
DOCDB simple family (application)
EP 93113955 A 19930901; DE 69317833 T 19930901; DK 93113955 T 19930901; FR 9210947 A 19920911; JP 22538793 A 19930910; US 30932994 A 19940920