# US 2018/0025831 A1 · Coil component and method of manufacturing coil component

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 2018/0025831 A1
- Document ID: US20180025831A1
- Status: Published application
- Kind: A1
- Application number: 15/720,416
- Filed: 2017-09-29
- Published: 2018-01-25
- Earliest claimed: 2016-04-01
- Assignees: Murata Manufacturing Co., Ltd.
- Applicants: Murata Manufacturing Co., Ltd.
- Inventors: Tatsuya SASAKI; Shinya HIRAI; Shin HASEGAWA
- Web page: https://patentgrep.com/patent/US20180025831A1

## CPC

- H01F 27/29: Terminals; Tapping arrangements {for signal inductances}
- H01F 17/062: {Toroidal core with turns of coil around it}
- H01F 27/2828: {Construction of conductive connections, of leads}
- H01F 27/292: {Surface mounted devices}
- H01F 41/02: for manufacturing cores, coils, or magnets (H01F41/14 takes precedence; for dynamo-electric machines H02K15/00)
- H01F 41/10: Connecting leads to windings (making electric connections in general H01R43/00)
- H01F 38/48: {Common mode inductor for reducing or eliminating common mode noise on parallel lines}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A coil component includes: a core having an annular shape; a coil wound around the core; and an electrode terminal for mounting the coil component. The electrode terminal is connected to the coil and has a mounting surface. The coil is formed by connecting a plurality of wire members. The electrode terminal has a recessed portion indented toward a back surface on a side opposite to the mounting surface. The wire member of the coil is connected to a back surface of a bottom portion of the recessed portion.

## Claims

### Claim 1

A coil component comprising:
a core having an annular shape;
a coil wound around the core; and
an electrode terminal for mounting the coil component, the electrode terminal being connected to the coil and having a mounting surface, wherein
the coil is formed by connecting a plurality of wire members,
the electrode terminal has a recessed portion indented toward a back surface of the electrode terminal which is opposite to the mounting surface, and
the wire member of the coil is connected to the back surface of the electrode terminal which is opposite to a bottom portion of the recessed portion.

### Claim 2 (depends on 1)

The coil component according to claim 1, wherein
the wire member is connected to the recessed portion by welding.

### Claim 3 (depends on 1)

The coil component according to claim 1, wherein the electrode terminal includes a copper plate and a plating film which covers the copper plate, and
the copper plate is exposed from the plating film on a mounting surface side of the bottom portion of the recessed portion.

### Claim 4 (depends on 1)

The coil component according to claim 1, wherein the electrode terminal includes a connecting portion which is connected to a mounting board on a peripheral edge of the recessed portion on an opening side of the recessed portion.

### Claim 5 (depends on 1)

The coil component according to claim 1, wherein the coil component includes a case which accommodates the core and the coil, and on which the electrode terminal is mounted, and
the case has a hole portion in which the recessed portion of the electrode terminal is fitted.

### Claim 6

A coil component comprising:
a core having an annular shape;
a coil wound around the core;
an electrode terminal for mounting the coil component, the electrode terminal being connected to the coil and having a mounting surface; and
a case covering the core and the coil and having a hole portion on a bottom surface thereof, wherein
the coil is formed by connecting a plurality of wire members,
the electrode terminal has a recessed portion indented toward a back surface of the electrode terminal which is opposite to the mounting surface, and the recessed portion of the electrode terminal is fitted and disposed in the hole portion of the case from the bottom surface side, and
the wire member of the coil is connected to the back surface of the electrode terminal which is opposite to a bottom portion of the recessed portion.

### Claim 7

A method of manufacturing a coil component including: a core having an annular shape; a coil wound around the core and formed by connecting a plurality of wire members; and an electrode terminal for mounting the coil component, the electrode terminal connected to the coil and having a mounting surface, and having a recessed portion indented toward a back surface on a side opposite to the mounting surface, said method comprising
connecting the wire member of the coil to a back surface of a bottom portion of the recessed portion by applying welding from a mounting surface side of the bottom portion of the recessed portion in a state where the wire member is brought into contact with the back surface of the bottom portion of the recessed portion.

### Claim 8 (depends on 7)

The method of manufacturing a coil component according to claim 7, wherein the wire member is connected to the back surface of the bottom portion of the recessed portion by applying laser welding from the mounting surface side of the bottom portion of the recessed portion.