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:
Oct. 15, 1996
Filed:
Jun. 13, 1994
Paul W Godek, Brockton, MA (US);
Michael J Grennan, Hull, MA (US);
Nidec America Corporation, Torrington, CT (US);
Abstract
In a low-profile printed circuit device, a first substrate is provided with a planar magnetic transformer and a planar magnetic inductor. The transformer and the inductor each have a primary winding defining spiral conductive patterns disposed on opposite sides of the first substrate relative to each other, and an inductive core extending through a respective inner aperture formed through the first substrate and surrounded by the respective primary winding. A second substrate is also provided, having a secondary transformer winding and a secondary inductor winding. Each secondary winding defines respective spiral conductive patterns disposed on opposite sides of the second substrate, and surrounding respective inner apertures extending through the second substrate. The second substrate is surface mounted onto the first substrate, with the secondary transformer winding overlying the primary transformer winding, and the secondary inductor winding overlying the primary inductor winding, so that each secondary winding generates an additional electrical output. Dielectric coatings cover both sides of each of the first and second substrates, and each defines margin portions covering the surfaces defining each inner aperture. Each margin portion projects into the aperture toward the respective inductive core for insulating the windings relative to each other and relative to the cores.