IP Library › Granted Patent US 12,412,688
Granted Patent B2
US 12,412,688 · App. 17/935,412 · Granted Sep 9, 2025

Electronic component and manufacturing method for the same

Inventors: Eiji Iso (Nagaokakyo, JP); Isao Ida (Nagaokakyo, JP); Hiroshi Okuizumi (Nagaokakyo, JP); Takao Kawachi (Nagaokakyo, JP)
Assignee: Murata Manufacturing Co., Ltd.
H01F1/14H01F17/0013H01F17/0033H01F17/04H01F27/255H01F27/2804H01F27/2852H01F27/292H01F41/0246H01F41/041H01F2017/0073H01F2017/048H01F2027/2809
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Quick Facts
Patent No.
US 12,412,688
App. No.
17/935,412
Granted
Sep 9, 2025
Kind
B2
Abstract

A manufacturing method for an electronic component includes preparing a first composite magnetic section provided with a first composite magnetic layer and at least one marker layer disposed on the first composite magnetic layer; and preparing a second composite magnetic section provided with a second composite magnetic layer and at least one coil formed by winding a conductive wire and buried in the second composite magnetic layer with part of the coil being exposed. The manufacturing method further includes obtaining a multilayer body by disposing the first composite magnetic section so that a surface on the opposite side of the first composite magnetic section to a surface where the marker layer is disposed opposes a surface of the second composite magnetic section; and obtaining a molded body having a marker area formed with non-conductive particles pressed into the first composite magnetic layer.

Claims (16)

1. An electronic component comprising:

an element body containing magnetic particles and resin;

a coil incorporated in the element body and formed by winding a conductive wire;

a marker area disposed on a surface of the element body and containing non-conductive particles; and

a pair of outer electrodes disposed on the surface of the element body and connected to the coil,

wherein

the non-conductive particles have a smaller volume average particle diameter than that of the magnetic particles, and

the non-conductive particles are disposed between the magnetic particles in the marker area.

2. The electronic component according to claim 1 , wherein

a ratio of the volume average particle diameter of the magnetic particles to the volume average particle diameter of the non-conductive particles is equal to or greater than 30.

3. The electronic component according to claim 1 , wherein the magnetic particles are metal magnetic particles.

4. The electronic component according to claim 1 , wherein

at least one of the outer electrodes is spaced from the marker area.

5. The electronic component according to claim 1 , wherein

at least one of the outer electrodes covers a portion of a surface of the molded body including the marker area.

6. The electronic component according to claim 1 , wherein the non-conductive particles are metallic oxide particles.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 26, 2022
From: ISO, EIJI; IDA, ISAO; OKUIZUMI, HIROSHI; KAWACHI, TAKAO
To: MURATA MANUFACTURING CO., LTD.
Reel/Frame 061217/0051 →
Priority Claims (1)
JP 2017-198304 · Oct 12, 2017 · national
Continuity (2)
Division 16151121 · Oct 3, 2018
Related Publication 20230015749A1 · Jan 19, 2023
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