Coil component

• US 10,468,177 B2
• Filed: 02/01/2018
• Issued: 11/05/2019
• Est. Priority Date: 03/07/2017
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: Igarashi, Akio, Yamaguchi, Kentaro
• Primary Examiner(s): Nguyen, Tuyen T
• Application Number:
  US15/886,339
• Publication Number:
  US 20180261380A1
• Time in Patent Office: 642 Days
• Field of Search: 336 65, 336 83, 336192, 336200, 336212, 336220-223, 336232-234
• CPC Class Codes: H01F 17/045 with core of cylindric geometry and coil wound along its longitudinal axis, i.e. rod or drum core
• CPC Class Codes: H01F 27/24 Magnetic cores
• CPC Class Codes: H01F 27/2828 Construction of conductive connections, of leads
• CPC Class Codes: H01F 27/292 Surface mounted devices

Abstract

A coil component includes a drum-shaped core including a winding core portion and first and second flange portions. A base of a terminal electrode disposed on the first flange portion and a base of an other terminal electrode disposed on the first flange portion are adjacent to each other in the direction in which first and second side surfaces oppose each other, and are along a flat surface of an outer end surface. A clearance between the base of the terminal electrode and the base of the other terminal electrode on a side near a lower surface is larger than that on a side near an upper surface.

Claims

1. A coil component comprising:

a drum-shaped core including a winding core portion and a flange portion that is disposed on one end portion of the winding core portion;

first and second wires that are helically wound around the winding core portion;

a terminal electrode to which a first end of the first wire is electrically connected; and

an other terminal electrode to which a first end of the second wire is electrically connected,

wherein

the flange portion has an inner end surface that faces the winding core portion and on which the one end portion of the winding core portion is disposed, an outer end surface that is opposite the inner end surface and faces outward, a lower surface that connects the inner end surface and the outer end surface to each other and is configured to face a mounting substrate side during mounting, an upper surface that is opposite the lower surface, and first and second side surfaces that oppose each other and extend to connect the lower surface and the upper surface to each other,

the terminal electrode and the other terminal electrode are arranged on the flange portion in a direction in which the first and second side surfaces oppose each other,

a projecting stepped portion that extends along a ridge line along which the upper surface and the outer end surface meet is formed on the outer end surface of the flange portion, and a flat surface is formed in a region of the outer end surface that is nearer than a region in which the stepped portion is formed to the lower surface,

each of the terminal electrode and the other terminal electrode includes a base disposed on the flat surface,

the base of the terminal electrode and the base of the other terminal electrode are adjacent to each other in the direction in which the first and second side surfaces oppose each other, and

a clearance between the base of the terminal electrode and the base of the other terminal electrode on a side near the lower surface is larger than that on a side near the upper surface.

2. The coil component according to claim 1, wherein the clearance between the base of the terminal electrode and the base of the other terminal electrode on the side near the lower surface is more than 0.3 mm, and the clearance on the side near the upper surface is from 0.1 mm to 0.3 mm.

3. The coil component according to claim 1, wherein a width of each base that is measured in the direction in which the first and second side surfaces oppose each other on the side near the upper surface is larger than that on the side near the lower surface, and each base adheres to the flat surface at least on the side near the upper surface.

4. The coil component according to claim 1, wherein a width of each base that is measured in the direction in which the first and second side surfaces oppose each other on the side near the lower surface is less than that on the side near the upper surface, and the terminal electrode and the other terminal electrode are respectively connected to the first and second wires on the side near the lower surface.

5. The coil component according to claim 1, wherein a thickness of each base is less than an amount of protrusion of the stepped portion from the flat surface.

6. The coil component according to claim 1, wherein:

the flange portion is a first flange portion, and the drum-shaped core includes a second flange portion disposed on another end portion of the winding core portion opposite the one end portion;

the second flange portion has an inner end surface that faces the winding core portion and on which the other end portion of the winding core portion is disposed, an outer end surface that is opposite the inner end surface and faces outward, a lower surface that connects the inner end surface and the outer end surface to each other and that is configured to face a mounting substrate side during mounting, an upper surface that is opposite the lower surface, and first and second side surfaces that oppose each other and extend to connect the lower surface and the upper surface to each other, as in the first flange portion,

an additional terminal electrode is electrically connected to a second end of the first wire opposite the first end of the first wire,

an other additional terminal electrode is electrically connected to a second end of the second wire opposite the first end of the second wire,

the additional terminal electrode and the other additional terminal electrode are arranged on the second flange portion in the direction in which the first and second side surfaces oppose each other,

the outer end surface of the second flange portion has the same structure as the outer end surface of the first flange portion, and

the additional terminal electrode and the other additional terminal electrode have the same structure as the terminal electrode and the other terminal electrode.

7. The coil component according to claim 2, wherein a width of each base that is measured in the direction in which the first and second side surfaces oppose each other on the side near the upper surface is larger than that on the side near the lower surface, and each base adheres to the flat surface at least on the side near the upper surface.

8. The coil component according to claim 2, wherein a width of each base that is measured in the direction in which the first and second side surfaces oppose each other on the side near the lower surface is less than that on the side near the upper surface, and the terminal electrode and the other terminal electrode are respectively connected to the first and second wires on the side near the lower surface.

9. The coil component according to claim 3, wherein a width of each base that is measured in the direction in which the first and second side surfaces oppose each other on the side near the lower surface is less than that on the side near the upper surface, and the terminal electrode and the other terminal electrode are respectively connected to the first and second wires on the side near the lower surface.

10. The coil component according to claim 7, wherein a width of each base that is measured in the direction in which the first and second side surfaces oppose each other on the side near the lower surface is less than that on the side near the upper surface, and the terminal electrode and the other terminal electrode are respectively connected to the first and second wires on the side near the lower surface.

11. The coil component according to claim 2, wherein a thickness of each base is less than an amount of protrusion of the stepped portion from the flat surface.

12. The coil component according to claim 3, wherein a thickness of each base is less than an amount of protrusion of the stepped portion from the flat surface.

13. The coil component according to claim 4, wherein a thickness of each base is less than an amount of protrusion of the stepped portion from the flat surface.

14. The coil component according to claim 7, wherein a thickness of each base is less than an amount of protrusion of the stepped portion from the flat surface.

15. The coil component according to claim 8, wherein a thickness of each base is less than an amount of protrusion of the stepped portion from the flat surface.

16. The coil component according to claim 2, wherein:

the flange portion is a first flange portion, and the drum-shaped core includes a second flange portion disposed on another end portion of the winding core portion opposite the one end portion;

the second flange portion has an inner end surface that faces the winding core portion and on which the other end portion of the winding core portion is disposed, an outer end surface that is opposite the inner end surface and faces outward, a lower surface that connects the inner end surface and the outer end surface to each other and that is configured to face a mounting substrate side during mounting, an upper surface that is opposite the lower surface, and first and second side surfaces that oppose each other and extend to connect the lower surface and the upper surface to each other, as in the first flange portion,

an additional terminal electrode is electrically connected to a second end of the first wire opposite the first end of the first wire,

an other additional terminal electrode is electrically connected to a second end of the second wire opposite the first end of the second wire,

the additional terminal electrode and the other additional terminal electrode are arranged on the second flange portion in the direction in which the first and second side surfaces oppose each other,

the outer end surface of the second flange portion has the same structure as the outer end surface of the first flange portion, and

the additional terminal electrode and the other additional terminal electrode have the same structure as the terminal electrode and the other terminal electrode.

17. The coil component according to claim 3, wherein:

the flange portion is a first flange portion, and the drum-shaped core includes a second flange portion disposed on another end portion of the winding core portion opposite the one end portion;

the second flange portion has an inner end surface that faces the winding core portion and on which the other end portion of the winding core portion is disposed, an outer end surface that is opposite the inner end surface and faces outward, a lower surface that connects the inner end surface and the outer end surface to each other and that is configured to face a mounting substrate side during mounting, an upper surface that is opposite the lower surface, and first and second side surfaces that oppose each other and extend to connect the lower surface and the upper surface to each other, as in the first flange portion,

an additional terminal electrode is electrically connected to a second end of the first wire opposite the first end of the first wire,

an other additional terminal electrode is electrically connected to a second end of the second wire opposite the first end of the second wire,

the additional terminal electrode and the other additional terminal electrode are arranged on the second flange portion in the direction in which the first and second side surfaces oppose each other,

the outer end surface of the second flange portion has the same structure as the outer end surface of the first flange portion, and

the additional terminal electrode and the other additional terminal electrode have the same structure as the terminal electrode and the other terminal electrode.

18. The coil component according to claim 4, wherein:

the flange portion is a first flange portion, and the drum-shaped core includes a second flange portion disposed on another end portion of the winding core portion opposite the one end portion;

the second flange portion has an inner end surface that faces the winding core portion and on which the other end portion of the winding core portion is disposed, an outer end surface that is opposite the inner end surface and faces outward, a lower surface that connects the inner end surface and the outer end surface to each other and that is configured to face a mounting substrate side during mounting, an upper surface that is opposite the lower surface, and first and second side surfaces that oppose each other and extend to connect the lower surface and the upper surface to each other, as in the first flange portion,

an additional terminal electrode is electrically connected to a second end of the first wire opposite the first end of the first wire,

an other additional terminal electrode is electrically connected to a second end of the second wire opposite the first end of the second wire,

the additional terminal electrode and the other additional terminal electrode are arranged on the second flange portion in the direction in which the first and second side surfaces oppose each other,

the outer end surface of the second flange portion has the same structure as the outer end surface of the first flange portion, and

the additional terminal electrode and the other additional terminal electrode have the same structure as the terminal electrode and the other terminal electrode.

19. The coil component according to claim 5, wherein:

the flange portion is a first flange portion, and the drum-shaped core includes a second flange portion disposed on another end portion of the winding core portion opposite the one end portion;

the second flange portion has an inner end surface that faces the winding core portion and on which the other end portion of the winding core portion is disposed, an outer end surface that is opposite the inner end surface and faces outward, a lower surface that connects the inner end surface and the outer end surface to each other and that is configured to face a mounting substrate side during mounting, an upper surface that is opposite the lower surface, and first and second side surfaces that oppose each other and extend to connect the lower surface and the upper surface to each other, as in the first flange portion,

an additional terminal electrode is electrically connected to a second end of the first wire opposite the first end of the first wire,

an other additional terminal electrode is electrically connected to a second end of the second wire opposite the first end of the second wire,

the additional terminal electrode and the other additional terminal electrode are arranged on the second flange portion in the direction in which the first and second side surfaces oppose each other,

the outer end surface of the second flange portion has the same structure as the outer end surface of the first flange portion, and

the additional terminal electrode and the other additional terminal electrode have the same structure as the terminal electrode and the other terminal electrode.

20. The coil component according to claim 7, wherein:

the flange portion is a first flange portion, and the drum-shaped core includes a second flange portion disposed on another end portion of the winding core portion opposite the one end portion;

the second flange portion has an inner end surface that faces the winding core portion and on which the other end portion of the winding core portion is disposed, an outer end surface that is opposite the inner end surface and faces outward, a lower surface that connects the inner end surface and the outer end surface to each other and that is configured to face a mounting substrate side during mounting, an upper surface that is opposite the lower surface, and first and second side surfaces that oppose each other and extend to connect the lower surface and the upper surface to each other, as in the first flange portion,

an additional terminal electrode is electrically connected to a second end of the first wire opposite the first end of the first wire,

an other additional terminal electrode is electrically connected to a second end of the second wire opposite the first end of the second wire,

the additional terminal electrode and the other additional terminal electrode are arranged on the second flange portion in the direction in which the first and second side surfaces oppose each other,

the outer end surface of the second flange portion has the same structure as the outer end surface of the first flange portion, and

the additional terminal electrode and the other additional terminal electrode have the same structure as the terminal electrode and the other terminal electrode.