# US 7,609,140 B2 · Molded body

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- Number: US 7,609,140 B2
- Document ID: US7609140B2
- Status: Granted
- Kind: B2
- Application number: 12/353,827
- Filed: 2009-01-14
- Published: 2009-07-23
- Granted: 2009-10-27
- Earliest claimed: 2008-01-18
- Assignees: Toko, Inc.
- Inventors: Yoshizumi Fukui
- Web page: https://patentgrep.com/patent/US7609140B2

## CPC

- H01F 27/255: made from particles (H01F27/26 takes precedence)
- H01F 1/26: by macromolecular organic substances
- H01F 27/292: {Surface mounted devices}
- H01F 17/04: with magnetic core
- H01F 2017/048: {with encapsulating core, e.g. made of resin and magnetic powder}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

There is provided a molded body having high fixing strength between a magnetic mold material and an external electrode. The molded body uses the magnetic mold material comprising at least 65 vol % of magnetic powder and up to 35 vol % of resin and the external electrode that has pits and projections on a surface that makes contact with the magnetic mold material. The external electrode and the magnetic mold material are integrally-molded such that at least a portion of the external electrode is exposed at at least one surface of the molded body. Spacing between the pit and projection of the external electrode is smaller than the maximum particle size of the magnetic powder.

## Claims

### Claim 1

A molded body having an external electrode and a magnetic mold material integrally-molded such that at least a portion of the external electrode is exposed at at least one surface of the molded body,
wherein
the magnetic mold material comprises at least 65 vol % of magnetic powder and up to 35 vol % of resin,
the external electrode has pits and projections on a surface that makes contact with the magnetic mold material, and
spacing between the pit and projection of the external electrode is smaller than the maximum particle size of the magnetic powder.

### Claim 2 (depends on 1)

The molded body of claim 1, wherein the external electrode is electrolytic metal foil.

### Claim 3 (depends on 1)

The molded body of claim 1, wherein the external electrode comprises electrolytic copper foil or electrolytic nickel foil.