On-die micro-transformer structures with magnetic materials
US7852185B2 · kind B2 · utility
16Cited by
61References
30Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 5, 2003 |
| Grant date | Dec 14, 2010 |
| Priority date | — |
| Expiry date | Oct 18, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01F27/29
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A transformer integrated on a die, the transformer comprising a set of conductive lines formed on the die within one layer and interconnected among each other so that no two lines belonging to any one winding are nearest neighbors. The set of conductive lines is surrounded by a magnetic material, which may be amorphous CoZrTa, CoFeHfO, CoAlO, FeSiO, CoFeAlO, CoNbTa, CoZr, and other amorphous cobalt alloys. The transformer may be operated at frequencies higher than 10 MHz and as high as 1 GHz, with relatively low resistance and relatively high magnetic coupling between the windings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.