Method for manufacturing inductor having coil embedded dust core
US7415757B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 26, 2005 |
| Grant date | Aug 26, 2008 |
| Priority date | — |
| Expiry date | Nov 2, 2026 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49073
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A method for manufacturing a coil-embedded dust core with a small variation in inductance value with efficiency includes a step (a) of charging soft magnetic metal powder including an insulating material, composing a green body 10, so as to cover a coil 1, and (b) compacting the soft magnetic metal powder covering the coil 1 in an axial direction of the coil 1. In the step (b), the soft magnetic metal powder is compacted while an amount of the soft metal powder charged into the part corresponding to the winding section is kept smaller than an amount of the soft magnetic metal powder charged into the other part that are not corresponding to the winding section, with an upper surface or a lower surface of the winding section as a reference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.