# US 12,014,865 B2 · Inductor and method for manufacturing the same

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- Number: US 12,014,865 B2
- Document ID: US12014865B2
- Status: Granted
- Kind: B2
- Application number: 17/033,536
- Filed: 2020-09-25
- Published: 2021-04-01
- Granted: 2024-06-18
- Earliest claimed: 2019-09-26
- Assignees: Murata Manufacturing Co., Ltd.
- Applicants: Murata Manufacturing Co., Ltd.
- Inventors: Hiroshi Okuizumi; Kozo Sato
- Web page: https://patentgrep.com/patent/US12014865B2

## CPC

- H01F 27/29: Terminals; Tapping arrangements {for signal inductances}
- H01F 17/04: with magnetic core
- H01F 27/255: made from particles (H01F27/26 takes precedence)
- H01F 27/2823: {Wires (H01F27/2866 takes precedence)}
- H01F 27/2852: {Construction of conductive connections, of leads}
- H01F 27/292: {Surface mounted devices}
- H01F 41/0246: {Manufacturing of magnetic circuits by moulding or by pressing powder (magnetic cores made by moulding or by pressing powder H01F27/255; soft magnetic particles H01F1/20, H01F1/36)}
- H01F 41/061: Winding flat conductive wires or sheets
- H01F 41/063: with insulation
- 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

An inductor includes a body including a magnetic portion and a coil embedded in the magnetic portion and outer electrodes. The coil includes a wound portion formed by winding a conductive wire having a pair of wide surfaces in upper and lower layers and first and second lead-out portions extending from end portions of the wound portion at outermost peripheries of the upper and lower layers. One wide surface of a distal end portion of the first lead-out portion is exposed at a mounting surface of the body, a first surface adjacent to the mounting surface, and a corner portion therebetween. One wide surface of a distal end portion of the second lead-out portion is exposed at the mounting surface, a second surface adjacent to the mounting surface, and a corner portion therebetween. The outer electrodes cover the exposed wide surfaces of the first and second lead-out portions.

## Claims

### Claim 1

An inductor comprising:
a body that is rectangular parallelepiped-shaped and that includes a magnetic portion containing magnetic powder and a coil embedded in the magnetic portion; and
a pair of outer electrodes provided on the body and connected to the coil,
wherein the coil includes
a wound portion configured by a conductive wire wound in an upper layer and a lower layer, the conductive wire having a pair of wide surfaces that are opposite to each other, and
a pair of lead-out portions, one of which extends from one end portion of the wound portion located at an outermost periphery of the upper layer and an other of which extends from an other end portion of the wound portion located at an outermost periphery of the lower layer,
wherein
the pair of lead-out portions include a first lead-out portion and a second lead-out portion,
one wide surface of a distal end portion of the first lead-out portion is exposed at a mounting surface of the body, a first surface of the body that is adjacent to the mounting surface, and a corner portion between the mounting surface and the first surface,
one wide surface of a distal end portion of the second lead-out portion is exposed at the mounting surface of the body, a second surface of the body that is different from the first surface of the body and adjacent to the mounting surface, and a corner portion between the mounting surface and the second surface,
one of the pair of outer electrodes covers the wide surface of the first lead-out portion that are exposed at the surfaces of the body,
an other of the pair of outer electrodes covers the wide surface of the second lead-out portion that are exposed at the surfaces of the body,
the pair of wide surfaces of the conductive wire each comprise an inner wide surface facing toward a winding axis and an outer wide surface facing away from the winding axis,
each lead-out portion includes a twisted portion between a corresponding one of the end portions of the wound portion and the distal end portion of the lead-out portion,
the inner wide surfaces of a wound-portion-side end portion of the twisted portion are parallel to the winding axis, and
the inner wide surfaces of a distal-side end portion of the twisted portion are twisted towards the mounting surface.

### Claim 2 (depends on 1)

The inductor according to claim 1, wherein
the body that is rectangular parallelepiped-shaped has a short-side direction and a long-side direction,
the wound portion is disposed such that the winding axis thereof crosses the mounting surface of the body,
the end portions of the wound portion are disposed on or near a plane extending in the short-side direction of the body and including the winding axis of the wound portion, and
when the body is viewed from the mounting surface, an angle among angles is defined by a straight line connecting the wound-portion-side end portion of the twisted portion and the distal-side end portion of the twisted portion, and the plane extending in the short-side direction of the body and including the winding axis of the wound portion, the angle that is adjacent to the winding axis of the wound portion is an acute angle.

### Claim 3 (depends on 1)

The inductor according to claim 1, wherein
the second surface of the body faces the first surface of the body.