Soft magnetic alloy powder and method for manufacturing same, as well as coil component made from soft magnetic alloy powder and circuit board carrying same
US11615902B2 · kind B2 · utility
1Cited by
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6Claims
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Key dates
| Filing date | Feb 24, 2020 |
| Grant date | Mar 28, 2023 |
| Priority date | — |
| Expiry date | Mar 16, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05K2201/1003
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A soft magnetic alloy powder contains Fe, Si, and at least one of Cr and Al, as constituent elements, wherein, on the surface of each grain constituting the alloy powder, an oxide film is provided which is such that: it contains Si, as well as at least one of Cr and Al, as constituent elements; these elements are contained at higher percentages by mass than those in the alloy part inside the grain; and the content of Si, expressed in percentage by mass, is higher than the total content of Cr and Al. The soft magnetic metal powder can achieve a higher filling rate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.