Magnetic alloy powder and method for manufacturing same, as well as coil component made of magnetic alloy powder and circuit board carrying same
US11371122B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 24, 2020 |
| Grant date | Jun 28, 2022 |
| Priority date | — |
| Expiry date | May 17, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C2202/02
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In an exemplary embodiment, a magnetic alloy powder is constituted by magnetic grains 100 whose alloy phase 1 is coated with an oxide film 2, wherein: the alloy phase 1 has a Fe content of 98 percent by mass or higher and also contains Si and at least one type of non-Si element that oxidizes more easily than Fe (element M); and the oxide film 2 is such that, at the location where the content of Si as expressed in percentage by mass is the highest according to the element distributions in the direction of film thickness, this content of Si is higher than the content of Fe, and also higher than the content of element M, at this location. The magnetic alloy powder has a high Fe content and also offers excellent insulating property.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.