Inductor array component
An inductor array component including an element body and a first straight wiring line and a second straight wiring line that are arranged on the same plane inside the element body. The element body includes a first region that is located on a first side of the first straight wiring line or the second straight wiring line in a normal direction that is normal to the plane, a second region that is located on a second side of the first straight wiring line or the second straight wiring line in the normal direction that is normal to the plane, and a third region that is located between the first straight wiring line and the second straight wiring line. The greater one out of the magnetoresistance of the first region and the magnetoresistance of the second region is greater than or equal to the magnetoresistance of the third region.
1. An inductor array component comprising:
an element body; and
a first straight wiring line and a second straight wiring line that are arranged on the same plane inside the element body;
wherein the element body includes a first region that is located on a first side of the first straight wiring line or the second straight wiring line in a normal direction that is normal to the plane, a second region that is located on a second side of the first straight wiring line or the second straight wiring line in the normal direction that is normal to the plane, and a third region that is located between the first straight wiring line and the second straight wiring line, and
the greater one out of a magnetoresistance of the first region and a magnetoresistance of the second region is greater than or equal to a magnetoresistance of the third region,
the first straight wiring line and the second straight wiring line have top surfaces facing the first region, bottom surfaces facing the second region, and inner side surfaces facing the third region in a cross section perpendicular to the extending direction of the first straight wiring line and the second straight wiring line,
an insulator is arranged in contact with at least one of the top surfaces, the bottom surfaces and the inner side surfaces,
the insulator is in contact with a region other than the highest magnetoresistance region among the magnetoresistance of the first region, the magnetoresistance of the second region, and the magnetoresistance of the third region.
2. The inductor array component according to claim 1 , wherein
when B1 is a thickness of the first region, B2 is a thickness of the second region, A is a width of the third region, μ B1 is an effective relative magnetic permeability of the first region, μ B2 is an effective relative magnetic permeability of the second region, μ A is an effective relative magnetic permeability of the third region, T is a thickness of the inductor array component, w is a width which is not smaller one out of the width of the first straight wiring line and the width of the second straight wiring line, and t is a thickness which is not smaller one out of the thickness of the first straight wiring line and the thickness of the second straight wiring line,
when B1≤(μ B2 /μ B1 )×B2,
B
1
≤
w
t
×
μ
A
μ
B
1
×
A
formula
(
1
)
formula (1) is satisfied,
when B1>(μ B2 /μ B1 )×B2,
B2
≤
w
t
×
μ
A
μ
B
2
×
A
formula
(
2
)
is satisfied, and
in both cases,
T
10
×
1
2
≤
B
1
and
T
10
×
1
2
≤
B
2
formula
(
3
)
are satisfied.
3. The inductor array component according to claim 2 , wherein
the thickness T of the inductor array component is less than or equal to 0.3 mm.
4. The inductor array component according to claim 2 , wherein
the thickness B1 of the first region and the thickness B2 of the second region are equal to each other, the effective relative magnetic permeability μ B1 of the first region and the effective relative magnetic permeability μ B2 of the second region are equal to each other, and both formula (1) and formula (2) are satisfied.
5. The inductor array component according to claim 2 , wherein
the width of the first straight wiring line and the width of the second straight wiring line are equal to each other and the thickness of the first straight wiring line and the thickness of the second straight wiring line are equal to each other.
6. The inductor array component according to claim 1 , further comprising:
the insulator that is arranged in at least part of a region between the first straight wiring line and the second straight wiring line.
7. The inductor array component according to claim 6 , wherein
the first straight wiring line and the second straight wiring line have side surfaces that face each other,
the insulator contacts the side surface of at least one out of the first straight wiring line and the second straight wiring line, and
a width of the part of the insulator that contacts the side surface is smaller than the width of the third region.
8. The inductor array component according to claim 6 , wherein
the first straight wiring line and the second straight wiring line each have an upper surface and a lower surface,
the insulator contacts at least one out of the upper surface and the lower surface, and
a thickness of the part of the insulator that contacts the at least one out of the upper surface and the lower surface is smaller than the thickness B1 of the first region and the thickness B2 of the second region.
9. The inductor array component according to claim 6 , wherein
the insulator is composed of an epoxy resin, a phenolic resin, a polyimide resin, an acrylic resin, a vinyl ether resin or a mixture of any of these resins.
10. The inductor array component according to claim 1 , wherein
the first region, the second region, and the third region are composed of the same magnetic material.
11. The inductor array component according to claim 1 , wherein
the first straight wiring line and the second straight wiring line each comprises a plurality of conductor layers that are stacked in the normal direction.
12. The inductor array component according to claim 1 , further comprising:
a coating layer on a main surface of the element body.
13. The inductor array component according to claim 1 , further comprising:
an outer terminal on a main surface of the element body;
wherein the outer terminal is composed of at least one out of Cu, Ag, Ni, Au, and Sn or an alloy of any of these metals.
14. The inductor array component according to claim 1 , wherein
the element body is a sintered body.
15. The inductor array component according to claim 1 , wherein
the element body includes a resin and a magnetic powder contained in the resin.
16. The inductor array component according to claim 15 , wherein
the element body further includes a non-magnetic powder composed of an insulating material.
17. The inductor array component according to claim 15 , wherein
the magnetic powder includes a ferrite powder.
18. The inductor array component according to claim 15 , wherein
the resin is composed of at least one out of an epoxy resin and an acrylic resin.
19. The inductor array component according to claim 3 , wherein
the thickness B1 of the first region and the thickness B2 of the second region are equal to each other, the effective relative magnetic permeability μ B1 of the first region and the effective relative magnetic permeability μ B2 of the second region are equal to each other, and both formula (1) and formula (2) are satisfied.
20. The inductor array component according to claim 3 , wherein
the width of the first straight wiring line and the width of the second straight wiring line are equal to each other and the thickness of the first straight wiring line and the thickness of the second straight wiring line are equal to each other.