Operating and manufacturing a DC-DC converter
US8957514B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 23, 2013 |
| Grant date | Feb 17, 2015 |
| Priority date | — |
| Expiry date | Oct 23, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02M3/1552
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Manufacturing a DC-DC converter on a chip includes: providing a die having a p-type top side and an n-type bottom side; removing an interior portion, creating a hole; flipping the interior portion; inserting the interior portion into the hole; fabricating high-side switch cells in the interior portion's top side and low-side switch cells in the exterior portion's top side; sputtering a magnetic material on the entire top side; burrowing tunnels into the magnetic material; and applying conductive material on the magnetic material and within the tunnels, electrically coupling pairs of high-side and low-side switches, with each pair forming a micro-power-switching phase, where the conductive material forms an output node of the phase, and the conductive material in the burrowed tunnels forms, in each phase, a torodial inductor with a single loop coil and, for the plurality of phases, a directly coupled inductor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.