Global Patent Index - EP 1956612 B1

EP 1956612 B1 20141231 - Ceramic material used for protection against electrical overstress and low-capacitance multilayer chip varistor using the same

Title (en)

Ceramic material used for protection against electrical overstress and low-capacitance multilayer chip varistor using the same

Title (de)

Keramikmaterial zur Verwendung als Schutz gegen elektrische Überspannung und Mehrschicht-Chip-Varistor mit niedriger Kapazität umfassend dieses Keramikmaterial

Title (fr)

Matériau céramique utilisé pour la protection contre les surcharges électriques et varistance à puce multicouche à faible capacité l'utilisant

Publication

EP 1956612 B1 (EN)

Application

EP 07102045 A

Priority

EP 07102045 A

Abstract (en)

[origin: EP1956612A1] A low-capacitance multilayer chip varistor (10) has capacitance lower than 0.5pF at 1MHz and has a characteristic of resisting more than thousands of times of 8KV electrostatic shock, which comprises a ceramic main body (11), outer electrodes (13) disposed at two ends of the ceramic main body (11) and inner electrodes (12) disposed therein; the ceramic main body (11) comprises inorganic glass of 3~50wt% and semi-conductive or conductive particles (14) of 50~97wt% with particle size of more than 0.1¼m, and a layer of inorganic glass film (15) covers the surface of semi-conductive or conductive particles (14), wherein the inorganic glass film (15) contains semi-conductive or conductive particles (16) of submicron or nanometer which is smaller than 1 micron., and the quantity contained of semi-conductive or conductive particles (16) is less than 20wt% of that of inorganic glass.

IPC 8 full level

H01C 7/10 (2006.01)

CPC (source: EP)

H01C 7/105 (2013.01); H01C 7/108 (2013.01); H01C 7/115 (2013.01); H01C 7/118 (2013.01)

Designated contracting state (EPC)

AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC NL PL PT RO SE SI SK TR

DOCDB simple family (publication)

EP 1956612 A1 20080813; EP 1956612 B1 20141231

DOCDB simple family (application)

EP 07102045 A 20070209