# US 2013/0154784 A1 · Coil-type electronic component

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- Number: US 2013/0154784 A1
- Document ID: US20130154784A1
- Status: Published application
- Kind: A1
- Application number: 13/708,614
- Filed: 2012-12-07
- Published: 2013-06-20
- Earliest claimed: 2011-12-15
- Assignees: Taiyo Yuden Co., Ltd.
- Inventors: Masahiro HACHIYA; Atsushi TANADA; Kenji OTAKE; Kiyoshi TANAKA; Tetsuyuki SUZUKI
- Web page: https://patentgrep.com/patent/US20130154784A1

## CPC

- H01F 5/003: {Printed circuit coils}
- H01F 1/33: mixtures of metallic and non-metallic particles; metallic particles having oxide skin
- H01F 17/045: {with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A coil-type electronic component having a coil inside or on the surface of a base material is characterized in that the base material of the coil-type electronic component is constituted by a group of soft magnetic alloy grains inter-bonded via oxide layers, multiple crystal grains are present in each soft magnetic alloy grain, and the oxide layers preferably have a two-layer structure whose outer layer is thicker than the inner layer.

## Claims

### Claim 1

A coil-type electronic component having a coil inside or on the surface of a base material, wherein the base material is constituted by a group of soft magnetic alloy grains inter-bonded via oxide layers, and multiple crystal grains having different orientation axes are present in each soft magnetic alloy grain.

### Claim 2 (depends on 1)

A coil-type electronic component according to claim 1, wherein the soft magnetic alloy contains iron, chromium, and silicate as its main ingredients.

### Claim 3 (depends on 1)

A coil-type electronic component according to claim 1, wherein the soft magnetic alloy contains iron, aluminum, and silicate as its main ingredients.

### Claim 4 (depends on 1)

A coil-type electronic component according to claim 1, wherein the base material has the soft magnetic alloy grains inter-bonded not via the oxide layers.

### Claim 5 (depends on 1)

A coil-type electronic component according to claim 1, wherein the oxide layers have a two-layer structure where an outer layer is thicker than an inner layer.

### Claim 6 (depends on 1)

A coil-type electronic component according to claim 1, wherein the surface of the outer layer of the oxide layer not inter-bonding the soft magnetic alloy grains has irregularities.

### Claim 7 (depends on 1)

A coil-type electronic component according to claim 1, wherein the average size of the soft magnetic alloy grains is 5 to 30 μm in equivalent average grain size d50% (arithmetic mean).

### Claim 8 (depends on 5)

A coil-type electronic component according to claim 5, wherein the main component of the inner layer is chromium oxide or aluminum oxide and the main component of the outer layer is iron-chromium oxide or iron-aluminum oxide.