Integrated magnetic core inductors with interleaved windings
US9337251B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 22, 2014 |
| Grant date | May 10, 2016 |
| Priority date | — |
| Expiry date | Jan 22, 2034 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01L2924/0002
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A coupled inductor topology for a thin-film magnetic core power inductor that enables efficient integrated power conversion. Coupled magnetic core inductors with interleaved windings inductors comprise magnetic films and partially or fully interleaved conductors. Methods described herein are suitable for integration into monolithic, chip stacking fabrication or other traditional semiconductor device fabrication techniques and equipment. Soft ferromagnetic materials exhibiting high permeability and low coercivity are deposited using thin-film techniques. A plurality of electrical conductors surround at least one ferromagnetic core giving rise to two or more windings. Windings are coupled to one another through magnetic core(s). Windings are used to control permeability, inductance and magnetic saturation, finding particular utility in high magnetic flux applications.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.