Flat magnetic element and power IC package using the same
US7821371B2 · kind B2 · utility
10Cited by
5References
11Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Oct 26, 2006 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Jan 24, 2027 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/29
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A planar magnetic device 1 including a first magnetic layer 3, a second magnetic layer 5, and a planar coil 4 disposed between the first magnetic layer 3 and the second magnetic layer 5, wherein magnetic particles 7 having a shape ratio S/L of 0.7 to 1 when a length of a long axis is L and a length of a short axis orthogonal to the long axis is L are filled in a gap W between coil wirings of the planar coil 4. According to the planar magnetic device 1, it is possible to realize a planar magnetic device such as an inductor reduced in height by using fine particles that enable to effectively obtain a large inductance value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.