# US 2013/0154780 A1 · Coil component

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- Number: US 2013/0154780 A1
- Document ID: US20130154780A1
- Status: Published application
- Kind: A1
- Application number: 13/693,766
- Filed: 2012-12-04
- Published: 2013-06-20
- Earliest claimed: 2011-12-15
- Assignees: Sumida Corporation
- Inventors: Satoru YAMADA; Kazuyuki KIKUCHI; Yoshiyuki TAHARA
- Web page: https://patentgrep.com/patent/US20130154780A1

## CPC

- H01F 27/29: Terminals; Tapping arrangements {for signal inductances}
- H01F 17/043: {with two, usually identical or nearly identical parts enclosing completely the coil (pot cores)}
- H01F 27/292: {Surface mounted devices}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A coil component including: a magnetic core which is formed by a magnetic material and which has a top surface, a bottom surface facing the top surface and a side surface continuous approximately perpendicularly to the top surface and the bottom surface; a coil which is buried inside the magnetic core and whose end portion protrudes from the side surface of the magnetic core; a flat-shaped terminal which protrudes from the side surface of the magnetic core, is bent toward the bottom surface of the magnetic core and is connected with the end portion of the coil, wherein there is formed an opening portion at a position corresponding to the place which is bent for the flat-shaped terminal from the side surface to the bottom surface of the magnetic core.

## Claims

### Claim 1

A coil component comprising:
a magnetic core which is formed by a magnetic material and which has a top surface, a bottom surface facing the top surface and a side surface continuous approximately perpendicularly to the top surface and the bottom surface;
a coil which is buried inside the magnetic core and whose end portion protrudes from the side surface of the magnetic core;
a flat-shaped terminal which protrudes from the side surface of the magnetic core, is bent toward the bottom surface of the magnetic core and is connected with the end portion of the coil, wherein
there is formed an opening portion in the flat-shaped terminal at a position corresponding to the place where the flat-shaped terminal is bent from the side surface to the bottom surface of the magnetic core.

### Claim 2 (depends on 1)

The coil component according to claim 1, wherein one end of the end portion of the coil is cut at the opening portion of the flat-shaped terminal.

### Claim 3 (depends on 1)

The coil component according to claim 1, wherein a filling member is to be filled at the opening portion of the flat-shaped terminal after bending the flat-shaped terminal.

### Claim 4 (depends on 3)

The coil component according to claim 3, wherein for the filling member, there is used a solder having a melting point higher than the melting point of the solder which is used when mounting the coil component.

### Claim 5 (depends on 1)

The coil component according to claim 1, wherein the opening portion of the flat-shaped terminal is formed to have a rectangular shape.

### Claim 6 (depends on 5)

The coil component according to claim 5, wherein the opening portion has a width of ⅓ or more of that of the flat-shaped terminal.

### Claim 7

A coil component comprising:
a magnetic core which is formed by a magnetic material and which has a top surface, a bottom surface facing the top surface and a side surface continuous approximately perpendicularly to the top surface and the bottom surface;
a coil which is buried inside the magnetic core and whose end portion protrudes from the side surface of the magnetic core;
a flat-shaped terminal which protrudes from the side surface of the magnetic core, is bent toward the bottom surface of the magnetic core and is connected with the end portion of the coil, wherein
there is formed a first groove on the side surface, which has a little wider width than that of the end portion of coil and extends from the top surface to the bottom surface.

### Claim 8 (depends on 7)

The coil component according to claim 7, wherein the side surface is formed in an approximately flat plane-surface shape except the second groove.

### Claim 9 (depends on 7)

The coil component according to claim 7, wherein the terminal is in a solid flat-plane shape.

### Claim 10 (depends on 7)

The coil component according to claim 7, wherein there is formed a second groove on the side surface, which has a little wider width than that of the end portion of coil and is vertically connected with the first groove.

### Claim 11 (depends on 10)

The coil component according to claim 10, wherein the second groove extends from the side surface to midway of the bottom surface.