ELECTRONIC COMPONENT

• US 20100328009A1
• Filed: 06/09/2010
• Published: 12/30/2010
• Est. Priority Date: 06/25/2009
• Status: Active Grant

• Current Assignee: Murata Manufacturing Co Limited
• Original Assignee: Murata Manufacturing Co Limited
• Inventors: TAWA, Katsunori
• Granted Patent: US 8,416,048 B2
• Time in Patent Office: Days
• US Class Current: 336/200
• CPC Class Codes: H01F 17/0013 with stacked layers
• CPC Class Codes: H01F 2017/002 Details of via holes for interconnecting the layers

Abstract

An electronic component includes overlapping coils in a rectangular laminate to form a substantially annular orbit. The orbit passes about an intersection of diagonal lines of an insulator layer of the laminate and is divided into a first orbit portion and a second orbit portion by a straight line parallel to a short side of the insulator layer. When an orbit obtained by the axisymmetric movement of the first orbit portion relative to the straight line is defined as a third orbit portion, a part of the second orbit portion overlaps with a part of the third orbit portion, and the non overlapped portion of the second orbit portion is positioned closer to the intersection than the non overlapped portion of the third orbit portion. A via hole conductor is provided in a region outboard an outer side of the non overlapping portion of the second orbit portion and inboard an outer side of the non overlapping portion of the third orbit portion.

Claims

1. An electronic component, comprising:

a plurality of substantially rectangular insulator layers formed as a laminate in a lamination direction;

a coil provided in the laminate, said coil including a first end positioned at an upper side of the laminate in the lamination direction relative to a second end of the coil;

external electrodes provided at an undersurface of the laminate; and

a via hole conductor provided in the laminate and connecting the first end and one of the external electrodes, wherein

the coil is formed by connecting a plurality of coil conductors that are overlapped with each other to form a substantially annular orbit when viewed in plan view in the lamination direction;

the substantially annular orbit is arranged about an intersection of diagonal lines of the insulator layers and is divided into a first orbit portion and a second orbit portion by a straight line parallel to a short side of the rectangular insulator layers,

in the case where an orbit obtained by axisymmetric movement of the first orbit portion relative to the straight line is defined as a third orbit portion, a part of the second orbit portion is overlapped with a part of the third orbit portion, and a portion of the second orbit portion non overlapped with the third orbit portion is positioned closer to the intersection than a non overlapped portion of the third orbit portion, and

the via hole conductor is provided in a region outboard the non overlapped portion of the second orbit portion and inboard an outer side of the non overlapped portion of the third orbit portion.

2. The electronic component according to claim 1, wherein the via hole is provided at a position overlapping with the second orbit portion when viewed from a long side direction and a short side direction of the insulator layers.

3. The electronic component according to claim 1, wherein the first orbit portion and the third orbit portion are combined to form a substantially rectangular orbit.

4. The electronic component according to claim 3, wherein the non overlapping portion of the third orbit forms a corner of the substantially rectangular orbit.

5. The electronic component according to claim 4, wherein

the coil has a spiral shape in which the coil is directed upward in a lamination direction while turning in a given direction;

and

the second end is provided at a corner at the farthest position in a given direction as viewed from the first end.

6. The electronic component according to claim 1, wherein the remaining portion of the second orbit forms a substantially arc shape centering on the via hole conductor.

7. The electronic component according to claim 2, wherein the remaining portion of the second orbit forms a substantially arc shape centering on the via hole conductor.

8. The electronic component according to claim 3, wherein the remaining portion of the second orbit forms a substantially arc shape centering on the via hole conductor.

9. The electronic component according to claim 4, wherein the remaining portion of the second orbit forms a substantially arc shape centering on the via hole conductor.

10. The electronic component according to claim 5, wherein the remaining portion of the second orbit forms a substantially arc shape centering on the via hole conductor.