Inductor component

Patent metadata

Field	Value
Publication number	US-11631526-B2
Application number	US-202016930142-A
Country	US
Kind code	B2
Filing date	Jul 15, 2020
Priority date	Sep 6, 2019
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

An inductor component that includes an element body; a coil wiring line that is arranged parallel to a first main surface of the element body inside the element body; and a first vertical wiring line and a second vertical wiring line that are buried inside the element body so that end surfaces thereof are exposed from the first main surface of the element body and that are electrically connected to the coil wiring line. In a first cross section that is perpendicular to a direction in which the coil wiring line extends and intersects the first vertical wiring line, a top surface of the coil wiring line contacts a bottom surface of the first vertical wiring line and the top surface of the coil wiring line is substantially shaped like a convex surface.

First claim

What is claimed is:

1. An inductor component comprising:
an element body;
a coil wiring line that is arranged parallel to a first main surface of the element body inside the element body; and
a first vertical wiring line and a second vertical wiring line that are buried inside the element body so that end surfaces thereof are exposed from the first main surface of the element body and that are electrically connected to the coil wiring line;
wherein
in a first cross section that is perpendicular to a direction in which the coil wiring line extends and intersects the first vertical wiring line, a top surface of the coil wiring line contacts a bottom surface of the first vertical wiring line and the top surface of the coil wiring line is substantially shaped like a convex surface; and
in the first cross section, a curvature of the top surface of the coil wiring line substantially lies in a range from 1/8000 m to 1/6000 m.

2. An inductor component comprising:
an element body;
a coil wiring line that is arranged parallel to a first main surface of the element body inside the element body; and
a first vertical wiring line and a second vertical wiring line that are buried inside the element body so that end surfaces thereof are exposed from the first main surface of the element body and that are electrically connected to the coil wiring line;
wherein
in a first cross section that is perpendicular to a direction in which the coil wiring line extends and intersects the first vertical wiring line, a top surface of the coil wiring line contacts a bottom surface of the first vertical wiring line and the top surface of the coil wiring line is substantially shaped like a convex surface; and
in the first cross section,
the top surface of the coil wiring line intersects a side surface of the first vertical wiring line, and
an angle formed between a tangent, which is tangential to the top surface of the coil wiring line at an intersection between the top surface of the coil wiring line and the side surface of the first vertical wiring line, and the side surface of the first vertical wiring line substantially lies in a range from 65° to 77°.

3. The inductor component according to claim 1 , wherein
the element body includes a resin layer that covers the coil wiring line, and
the first vertical wiring line and the second vertical wiring line each include a via conductor that penetrates through the resin layer and contacts the top surface of the coil wiring line.

4. The inductor component according to claim 3 , wherein
a bottom surface of the via conductor is shorter than the top surface of the via conductor in terms of length in a direction parallel to the first main surface in the first cross section.

5. The inductor component according to claim 1 , wherein
in a second cross section that is perpendicular to a direction in which the coil wiring line extends and intersects the second vertical wiring line, a top surface of the coil wiring line contacts a bottom surface of the second vertical wiring line and the top surface of the coil wiring line is substantially shaped like a convex surface.

6. The inductor component according to claim 1 , wherein
in the first cross section,
the top surface of the coil wiring line intersects a side surface of the first vertical wiring line, and

an angle formed between a tangent, which is tangential to the top surface of the coil wiring line at an intersection between the top surface of the coil wiring line and the side surface of the first vertical wiring line, and the side surface of the first vertical wiring line substantially lies in a range from 65° to 77°.

7. The inductor component according to claim 1 , wherein
the element body includes a resin layer that covers the coil wiring line, and
the first vertical wiring line and the second vertical wiring line each include a via conductor that penetrates through the resin layer and contacts the top surface of the coil wiring line.

8. The inductor component according to claim 2 , wherein
the element body includes a resin layer that covers the coil wiring line, and
the first vertical wiring line and the second vertical wiring line each include a via conductor that penetrates through the resin layer and contacts the top surface of the coil wiring line.

9. The inductor component according to claim 6 , wherein
the element body includes a resin layer that covers the coil wiring line, and
the first vertical wiring line and the second vertical wiring line each include a via conductor that penetrates through the resin layer and contacts the top surface of the coil wiring line.

10. The inductor component according to claim 7 , wherein
a bottom surface of the via conductor is shorter than the top surface of the via conductor in terms of length in a direction parallel to the first main surface in the first cross section.

11. The inductor component according to claim 8 , wherein
a bottom surface of the via conductor is shorter than the top surface of the via conductor in terms of length in a direction parallel to the first main surface in the first cross section.

12. The inductor component according to claim 9 , wherein
a bottom surface of the via conductor is shorter than the top surface of the via conductor in terms of length in a direction parallel to the first main surface in the first cross section.

13. The inductor component according to claim 1 , wherein in a second cross section that is perpendicular to a direction in which the coil wiring line extends and intersects the second vertical wiring line, a top surface of the coil wiring line contacts a bottom surface of the second vertical wiring line and the top surface of the coil wiring line is substantially shaped like a convex surface.

14. The inductor component according to claim 2 , wherein
in a second cross section that is perpendicular to a direction in which the coil wiring line extends and intersects the second vertical wiring line, a top surface of the coil wiring line contacts a bottom surface of the second vertical wiring line and the top surface of the coil wiring line is substantially shaped like a convex surface.

15. The inductor component according to claim 3 , wherein
in a second cross section that is perpendicular to a direction in which the coil wiring line extends and intersects the second vertical wiring line, a top surface of the coil wiring line contacts a bottom surface of the second vertical wiring line and the top surface of the coil wiring line is substantially shaped like a convex surface.

16. The inductor component according to claim 4 , wherein
in a second cross section that is perpendicular to a direction in which the coil wiring line extends and intersects the second vertical wiring line, a top surface of the coil wiring line contacts a bottom surface of the second vertical wiring line and the top surface of the coil wiring line is substantially shaped like a convex surface.

17. The inductor component according to claim 6 , wherein
in a second cross section that is perpendicular to a direction in which the coil wiring line extends and intersects the second vertical wiring line, a top surface of the coil wiring line contacts a bottom surface of the second vertical wiring line and the top surface of the coil wiring line is substantially shaped like a convex surface.

18. The inductor component according to claim 7 , wherein
in a second cross section that is perpendicular to a direction in which the coil wiring line extends and intersects the second vertical wiring lin

Assignees

• Murata Manufacturing Co

Inventors

• Tominaga Ryuichiro
• Yoshioka Yoshimasa

Classifications

• H01F27/2823 Primary

  Wires (H01F27/2866 takes precedence) · CPC title

• H01F27/292

  Surface mounted devices · CPC title

• H01F2017/0066

  with a magnetic layer · CPC title

• H01F27/28

  Coils; Windings; Conductive connections · CPC title

• H01F17/0013 Primary

  with stacked layers · CPC title