Inductor device and electronic apparatus

Patent metadata

Field	Value
Publication number	US-9324491-B2
Application number	US-201514863790-A
Country	US
Kind code	B2
Filing date	Sep 24, 2015
Priority date	Dec 6, 2013
Publication date	Apr 26, 2016
Grant date	Apr 26, 2016

Abstract

An inductor device includes a layer-laminated member with laminated base-material layers and a coil with a winding axis coincident with a direction of layer lamination, a smaller-thickness portion near one end portion thereof in the direction of layer lamination, and a greater-thickness portion with more base-material layers than that in the smaller-thickness portion. The coil is located in the greater-thickness portion. The coil is connected, at its one end positioned near one end portion of the layer-laminated member, to a conductor pattern in the smaller-thickness portion. The coil is connected, at its other end positioned near the other end portion of the layer-laminated member, to a conductor pattern in a base-material layer located near the other end portion of the layer-laminated member. The conductor patterns are located at respective different positions in the direction of layer lamination.

First claim

What is claimed is:

1. An inductor device comprising:
a layer-laminated member including base-material layers laminated; and
a coil located in the layer-laminated member with a winding axis coincident with a direction of layer lamination; wherein
the layer-laminated member includes a smaller-thickness portion positioned near one end portion thereof in the direction of layer lamination, and a greater-thickness portion with a greater number of base-material layers laminated therein than that in the smaller-thickness portion;
the coil is located in the greater-thickness portion;
the coil is connected, at one end positioned near one end portion of the layer-laminated member, to a first terminal portion in the smaller-thickness portion;
the coil is connected, at the other end positioned near the other end portion of the layer-laminated member, to a second terminal portion in a base-material layer located near the other end portion of the layer-laminated member; and
the first terminal portion and the second terminal portion are located at respective different positions in the direction of layer lamination.

2. The inductor device according to claim 1 , wherein the first terminal portion and the second terminal portion are located at positions which prevent respective conductor line paths which connect both the ends of the coil to the first terminal portion and the second terminal portion from being located in the greater-thickness portion, along a direction of the winding axis of the coil, near a side of the coil.

3. The inductor device according to claim 1 , wherein the first terminal portion and the second terminal portion are located at positions which do not overlap with the coil, in a plan view of the layer-laminated member.

4. The inductor device according to claim 1 , wherein
the smaller-thickness portion has flexibility; and
a connector is connected to the first terminal portion in the smaller-thickness portion.

5. The inductor device according to claim 1 , wherein
the layer-laminated member includes two or more smaller-thickness portions; and
the smaller-thickness portions are located near both the respective end portions of the layer-laminated member in the direction of layer lamination.

6. The inductor device according to claim 1 , wherein
the first terminal portion is located on an outermost layer near one end of the layer-laminated member in the direction of layer lamination; and
the second terminal portion is located on an outermost layer near the other end of the layer-laminated member in the direction of layer lamination.

7. The inductor device according to claim 2 , wherein the conductor line paths are defined by via conductors.

8. The inductor device according to claim 1 , wherein the first terminal portion and the second terminal portion are located on a same main surface of the base-material layers.

9. The inductor device according to claim 1 , wherein the first terminal portion and the second terminal portion are located on opposite main surfaces of the base-material layers.

10. An electronic apparatus comprising the inductor device according to claim 1 .

11. The electronic apparatus according to claim 10 , further comprising a substrate on which the inductor device is mounted.

12. The electronic apparatus according to claim 11 , wherein the substrate includes a level difference on which the inductor device is mounted so as to straddle the level difference.

13. The electronic apparatus according to claim 11 , further comprising an interposer mounted on the substrate between the substrate and the inductor device.

14. The electronic apparatus according to claim 11 , wherein one of the first and second terminal portions is connected to the substrate via solder and the other of the first and second terminal portions is connected to the substrate via a connector.

15. The electronic apparatus according to claim 11 , wherein each of the first and second terminal portions is connected to the substrate via a connector.

Assignees

• Murata Manufacturing Co

Inventors

• Yosui Kuniaki

Classifications

• H05K1/165

  incorporating printed inductors · CPC title

• H05K3/4632

  laminating thermoplastic or uncured resin sheets comprising printed circuits without added adhesive materials between the sheets · CPC title

• H01F27/29 Primary

  Terminals; Tapping arrangements {for signal inductances} · CPC title

• H01F17/0013 Primary

  with stacked layers · CPC title

• H01F27/2804

  Printed windings · CPC title