EP 3058760 A1 20160824 - ELECTRET STRUCTURE
Title (en)
ELECTRET STRUCTURE
Title (de)
ELEKTRETSTRUKTUR
Title (fr)
STRUCTURE ÉLECTRET
Publication
Application
Priority
- DE 102013221140 A 20131017
- EP 2014067623 W 20140819
Abstract (en)
[origin: WO2015055336A1] According to the invention, an electret structure (1) is proposed which comprises an electrically conductive substrate (10), a first electret layer (30) and a porous dielectric layer (20), which is arranged between the substrate (10) and the first electret layer (30). The electrically conductive substrate (10) in this case preferably forms an electrode of the electret structure (1) according to the invention. The invention is based on the concept of using the porous dielectric layer (20) to separate the charged electret layer (30) from the electrode (10). As a result, the migration of electrical charges (50) out of the electret layer (30) towards the rear electrode (10) is impeded. Likewise, the migration of oppositely charged charge carriers (55) out of the rear electrode (10) into the electret layer (30) is impeded. The charge stability of an electret structure (10) according to the invention in comparison with conventional addons without a porous dielectric layer (20) between the electret layer (30) and the rear electrode (10) is thus markedly increased.
IPC 8 full level
B06B 1/02 (2006.01); H04R 19/01 (2006.01)
CPC (source: EP)
B06B 1/0292 (2013.01); H04R 19/01 (2013.01)
Citation (search report)
See references of WO 2015055336A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated extension state (EPC)
BA ME
DOCDB simple family (publication)
WO 2015055336 A1 20150423; CN 105659627 A 20160608; DE 102013221140 A1 20150423; EP 3058760 A1 20160824
DOCDB simple family (application)
EP 2014067623 W 20140819; CN 201480056804 A 20140819; DE 102013221140 A 20131017; EP 14753067 A 20140819