Invention Grant
- Patent Title: Printed circuit board coil
- Patent Title (中): 印刷电路板线圈
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Application No.: US12236832Application Date: 2008-09-24
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Publication No.: US07973635B2Publication Date: 2011-07-05
- Inventor: David W. Baarman , Joshua K. Schwannecke , Warren E. Guthrie , Richard A. Wahl , Paul Duckworth
- Applicant: David W. Baarman , Joshua K. Schwannecke , Warren E. Guthrie , Richard A. Wahl , Paul Duckworth
- Applicant Address: US MI Ada
- Assignee: Access Business Group International LLC
- Current Assignee: Access Business Group International LLC
- Current Assignee Address: US MI Ada
- Agency: Warner Norcross & Judd LLP
- Main IPC: H01F27/28
- IPC: H01F27/28 ; H01F21/02 ; H01F27/29 ; H01F5/00

Abstract:
A multilayer printed circuit board (“PCB”) coil that simulates a coil formed from litz wire. The PCB includes a plurality of alternating conductor and insulating layers interconnected to cooperatively form the coil. Each conductor layer includes a trace that follows the desired coil shape and is divided into a plurality of discrete conductor segments. The segments are electrically connected across layers to provide a plurality of current flow paths (or filaments) that undulate between the layers in a regular, repeating pattern. The coil may be configured so that each filament spends a substantially equal amount of time in proximity to the paired coil and therefore contributes substantially equally to the self or mutual inductance of the coil. Each conductor layer may include a plurality of associated traces and intralayer connector that interconnected so that each filament undulates not only upwardly/downwardly, but also inwardly/outwardly in a regular, repeating pattern.
Public/Granted literature
- US20090085706A1 PRINTED CIRCUIT BOARD COIL Public/Granted day:2009-04-02
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