# US 2020/0402701 A1 · Multilayer coil component

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- Number: US 2020/0402701 A1
- Document ID: US20200402701A1
- Status: Published application
- Kind: A1
- Application number: 16/901,165
- Filed: 2020-06-15
- Published: 2020-12-24
- Earliest claimed: 2019-06-21
- Assignees: TDK Corporation
- Applicants: TDK Corporation
- Inventors: Yuto SHIGA; Hajime KATO; Kazuya TOBITA; Youichi KAZUTA; Noriaki HAMACHI; Makoto YOSHINO
- Web page: https://patentgrep.com/patent/US20200402701A1

## CPC

- H01F 17/0013: {with stacked layers}
- H01F 27/29: Terminals; Tapping arrangements {for signal inductances}
- H01F 27/292: {Surface mounted devices}
- H01F 27/323: {Insulation between winding turns, between winding layers}
- H01F 41/043: {by thick film techniques}
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A pair of terminal electrodes 4 and 5 have electrode parts 4a and 5a and electrode parts 4b and 5b when viewed from a stacking direction, respectively. A plurality of connection conductors are disposed at positions not overlapping a plurality of coil conductors when viewed from the stacking direction. At least two of the plurality of connection conductors are disposed in a first region A1 or a second region A2 between the terminal electrodes 4 and 5 and an outer edge 9a of a coil 9 when viewed from the stacking direction. The first region A1 and the second region A2 overlap the electrode parts 4a and 5a when viewed from the facing direction of a pair of end surfaces 2a and 2b and overlap the electrode parts 4b and 5b when viewed from the facing direction of a pair of main surfaces 2c and 2d.

## Claims

### Claim 1

A multilayer coil component comprising:
an element body having a plurality of stacked dielectric layers and having a pair of end surfaces facing each other, a pair of main surfaces facing each other, and a pair of side surfaces facing each other in a stacking direction of the plurality of dielectric layers, one of the main surfaces being a mounting surface;
a coil disposed in the element body, including a plurality of coil conductors and a plurality of connection conductors connecting the coil conductors adjacent to each other in the stacking direction, and having a coil axis extending along the stacking direction; and
a pair of terminal electrodes connected to the coil and respectively disposed in recess portions of the element body on the pair of end surface sides of the element body, wherein
each of the recess portions of the element body is provided over the end surface and the mounting surface,
each of the pair of terminal electrodes has a first part extending along a facing direction of the pair of main surfaces and a second part extending along a facing direction of the pair of end surfaces when viewed from the stacking direction,
the plurality of connection conductors are disposed at positions not overlapping the plurality of coil conductors when viewed from the stacking direction,
at least two of the plurality of connection conductors are disposed in a region between the terminal electrode and an outer edge of the coil when viewed from the stacking direction, and
the region overlaps the first part when viewed from the facing direction of the pair of end surfaces and overlaps the second part when viewed from the facing direction of the pair of main surfaces.

### Claim 2 (depends on 1)

The multilayer coil component according to claim 1, wherein
the terminal electrode is formed by a first electrode layer and a second electrode layer being stacked in the stacking direction,
a width of the first electrode layer in the facing direction of the pair of end surfaces and a width of the first electrode layer in the facing direction of the pair of main surfaces are smaller than a width of the second electrode layer in the facing direction of the pair of end surfaces and a width of the second electrode layer in the facing direction of the pair of main surfaces when viewed from the stacking direction, and
the connection conductor disposed in the region is disposed in the same layer as the first electrode layer.

### Claim 3 (depends on 1)

The multilayer coil component according to claim 1, wherein the connection conductor disposed in the region has a part parallel to the outer edge of the coil when viewed from the stacking direction.

### Claim 4 (depends on 1)

The multilayer coil component according to claim 1, wherein a part of the coil overlapping the terminal electrode when viewed from the facing direction of the pair of end surfaces has a shape in which an outer shape of the outer edge in the facing direction of the pair of end surfaces becomes small from the other main surface toward the mounting surface when viewed from the stacking direction.

### Claim 5 (depends on 1)

The multilayer coil component according to claim 1, wherein a first distance as a shortest distance between an outer edge of the coil and a corner portion formed by the first part and the second part is larger than a second distance as a shortest distance between the first part and an outer edge of the coil and a third distance as a shortest distance between the second part and the outer edge of the coil when viewed from the stacking direction.

### Claim 6 (depends on 5)

The multilayer coil component according to claim 5, wherein the connection conductor disposed in the region is disposed on a straight line connecting the corner portion of the terminal electrode and the outer edge of the coil and having the first distance when viewed from the stacking direction.