Low profile printed circuit board
US5565837A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 13, 1994 |
| Grant date | Oct 15, 1996 |
| Priority date | — |
| Expiry date | Jun 13, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2203/1476
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
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 …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.