Printed circuit boards having integrated inductor cores
US6763575B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 11, 2001 |
| Grant date | Jul 20, 2004 |
| Priority date | — |
| Expiry date | Jun 22, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/53543
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A process for forming printed circuit boards having integral inductor cores. According to the invention, a thin nickel layer is formed on a copper foil. The copper foil structure is then laminated to a substrate such that the nickel layer is in contact with the substrate. The copper foil is removed, leaving the nickel layer on the substrate. Using photomechanical imaging and etching techniques known in the art, NiFe is plated and patterned directly on the nickel layer, thereby forming integral inductor cores of the substrate. This process of the present invention allows for the elimination of several steps used in known processes, while also reducing etch time and minimizing waste of NiFe.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.