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1. EP1341195 - Capacitive device

Office European Patent Office
Application Number 02405160
Application Date 01.03.2002
Publication Number 1341195
Publication Date 03.09.2003
Publication Kind A1
IPC
H01G 4/38
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
4Fixed capacitors; Processes of their manufacture
38Multiple capacitors, i.e. structural combinations of fixed capacitors
H01G 4/38
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE
4Fixed capacitors; Processes of their manufacture
38Multiple capacitors, i.e. structural combinations of fixed capacitors
CPC
H01G 4/385
HELECTRICITY
01BASIC ELECTRIC ELEMENTS
GCAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES OR LIGHT-SENSITIVE DEVICES, OF THE ELECTROLYTIC TYPE
4Fixed capacitors; Processes of their manufacture
38Multiple capacitors, i.e. structural combinations of fixed capacitors
385Single unit multiple capacitors, e.g. dual capacitor in one coil
Applicants ABB RESEARCH LTD
Inventors FUHRMANN HENNING
CARLEN MARTIN
LAKNER MARTIN
SPJUT HENRIK
JONSSON JOHAN
Designated States
Priority Data 02405160 01.03.2002 EP
Title
(DE) Kondensatorstruktur
(EN) Capacitive device
(FR) Structure de condensateur
Abstract
(EN)
The present invention is concerned with a capacitive device, and in particular a metallized film capacitor made of a capacitive base structure with series connected internal base capacitors (21,41,42,22), the structure being repeated any number of times by suitably winding or stacking. The capacitor comprises auxiliary intermediate electrodes (32,34) which on either side do face only one electrode (11,53,13) which is part of an adjacent conductive layer (1,5). The internal base capacitors have a larger active capacitor area than the internal base capacitors of a comparable capacitor of conventional design, and the problems due to misalignment of the conductive layers and deviations in active base capacitor area are reduced. Further, the auxiliary intermediate electrodes do not see large in-plane charging currents, and therefore can preferentially have a high sheet resistance and good self-healing properties.