Global Patent Index - EP 0716432 B1

EP 0716432 B1 2000-02-23 - Planar inductor

Title (en)

Planar inductor

Title (de)

Planare Induktivität

Title (fr)

Inductivité plane

Publication

EP 0716432 B1 (DE)

Application

EP 95203290 A

Priority

DE 4442994 A

Abstract (en)

[origin: EP0716432A1] The inductance has at least one essentially spiral shaped coil (2, 3) formed on a flat substrate (1). A layer of ferromagnetic material (13) is arranged on the substrate (1). The ferromagnetic material (13) is applied to the substrate (1) in a coating process, within an insulation window (12) fastened to the substrate (1). The window (12) is preferably fastened to the substrate (1) by adhesive. The ferromagnetic material may be a coating material mixed with a ferromagnetic admixture, eg. ferrite powder. The value of the induction of the coil(s) (2,3) and/or the coupling between the coils (2, 3) may be determined by the alignment and/or the contour of the insulation window (12) and/or by the layer depth and/or combination of the ferromagnetic material (13).

IPC 1-7 (main, further and additional classification)

H01F 17/00; H01F 41/04

IPC 8 full level (invention and additional information)

H01F 17/00 (2006.01); H01F 21/06 (2006.01); H01F 41/04 (2006.01)

CPC (invention and additional information)

H01F 41/046 (2013.01); H01F 17/0006 (2013.01); H01F 21/06 (2013.01); H01F 2017/0046 (2013.01); H01F 2017/0086 (2013.01); Y10T 29/4902 (2013.01); Y10T 29/49073 (2013.01)

Designated contracting state (EPC)

DE FR GB

DOCDB simple family

DE 4442994 A1 19960605; EP 0716432 A1 19960612; EP 0716432 B1 20000223; JP 3548643 B2 20040728; JP H08222437 A 19960830; US 2004004525 A1 20040108; US 6600403 B1 20030729; US 6722017 B2 20040420