The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 05, 2005
Filed:
Aug. 15, 2002
Andrew Ferencz, Southborough, MA (US);
Gregory A. Zvonar, Winchester, MA (US);
Bernhard Schroter, Upton, MA (US);
Gerald Miller, Chelmsford, MA (US);
William NG, Leominister, MA (US);
Andrew Ferencz, Southborough, MA (US);
Gregory A. Zvonar, Winchester, MA (US);
Bernhard Schroter, Upton, MA (US);
Gerald Miller, Chelmsford, MA (US);
William Ng, Leominister, MA (US);
Galaxy Power, Inc., Westborough, MA (US);
Abstract
A transformer has a primary winding made from a first conducting trace formed on a first multilayer printed circuit board, and a secondary winding made from a second conducting trace formed on a second multilayer printed circuit board. The primary winding is magnetically coupled to the secondary winding. The windings are etched as traces in copper layers of the PC boards as spirals. The spiral of one copper layer is connected to the spiral of a different copper layer by a via, or vias, formed through the insulating layer of the PC board. The vias are drilled, cleaned, and plated with conducting material, for example copper. By using multiple layers, and by connecting spiral windings of each layer to the windings of the next layer by use of vias, any number of turns can be built into a primary winding, or into a secondary winding.