# US 2021/0241963 A1 · Surface mounted inductor and method for manufacturing the same

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- Number: US 2021/0241963 A1
- Document ID: US20210241963A1
- Status: Published application
- Kind: A1
- Application number: 17/235,642
- Filed: 2021-04-20
- Published: 2021-08-05
- Earliest claimed: 2014-09-05
- Assignees: Murata Manufacturing Co., Ltd.
- Applicants: Murata Manufacturing Co., Ltd.
- Inventors: Keita MUNEUCHI
- Web page: https://patentgrep.com/patent/US20210241963A1

## CPC

- H01F 27/2823: {Wires (H01F27/2866 takes precedence)}
- H01F 17/04: with magnetic core
- H01F 27/255: made from particles (H01F27/26 takes precedence)
- H01F 27/292: {Surface mounted devices}
- H01F 41/076: Forming taps or terminals while winding, e.g. by wrapping or soldering the wire onto pins, or by directly forming terminals from the wire
- H01F 41/10: Connecting leads to windings (making electric connections in general H01R43/00)
- H01F 27/32: Insulating of coils, windings, or parts thereof
- 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

A surface mounted inductor is equipped with a coil formed by winding a conductive wire, and a formed body in which the coil is sealed with a sealing material that mainly contains metal magnetic powder and a resin. The coil is embedded so that surfaces of lead-out ends are exposed on surfaces of the formed body. The resin at portions of surfaces of the formed body where external terminals are formed is removed, and the metal magnetic powder and a plating layer forming the external terminals are joined to each other, thereby connecting the external terminals and the lead-out ends of the coil.

## Claims

### Claim 1

A surface mounted inductor comprising:
a body including metal magnetic powder and a resin,
a coil configured by a wound conductive wire and having lead-out ends, the coil being embedded in the body, and
external terminals, wherein,
surfaces of the body include a first portion where the resin existing in the surfaces of the body is selectively removed according to a shape of the external terminal, and
a second portion where the resin existing in the surfaces of the body remains,
in the first portion, the metal magnetic powder exposed on the surfaces of the body and a plating layer configuring the external terminals are joined to each other, and
the external terminals and the lead-out ends of the coil are connected to each other.

### Claim 2 (depends on 1)

The surface mounted inductor according to claim 1, wherein
the external terminals include a conductive joint material layer covering the lead-out ends of the coil exposed on the surfaces of the body, and the plating layer covering the conductive joint material layer.