High efficiency on-chip 3D transformer structure
US9831026B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 24, 2013 |
| Grant date | Nov 28, 2017 |
| Priority date | — |
| Expiry date | Jul 24, 2033 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F2027/2819
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A transformer structure includes at least three sections, each corresponding to metal layers of an integrated circuit. A first section of the at least three sections is electrically coupled to a third section with a second section disposed between the first and third sections. The at least three sections includes inductor coils, all of which are wound in a same direction and voltage phase starting at an outer terminal and continuing to an inner terminal of each inductor coil. At least one radial wiring channel passes through a portion of a coil in one of the three sections to provide an external connection to an internal terminal of the coil in at least one of the three sections.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.