Coil component
In a coil component, a non-magnetic part is bridged between a first coil and a second coil in a cross section of an element body. Therefore, a magnetic flux in a direction along a magnetic core of the first coil and a magnetic core of the second coil is hindered by the non-magnetic part between the first coil and the second coil. Accordingly, a magnetic flux of the first coil and a magnetic flux of the second coil are difficult to interfere with each other.
1 . A coil component comprising:
an element body;
a first coil (i) in the element body and (ii) wound only around a first magnetic core having a first longitudinal axis in a first direction;
a second coil (i) in the element body, (ii) wound only around a second magnetic core having a second longitudinal axis in the first direction that is parallel to and spaced from the first longitudinal axis and (iii) adjacent to the first coil in a second direction perpendicular to the first direction;
an insulating substrate (i) in the element body, (ii) comprising a non-magnetic insulating material, (iii) that is a flat plate oriented in the second direction, and (iv) that abuts the first coil and the second coil in the first direction; and
a non-magnetic part (i) between the first coil and the second coil in the second direction and (ii) that overlaps the first magnetic core and the second magnetic core in the second direction, the non-magnetic part extends continuously from an end of the first coil nearest to the second coil to an end of the second coil nearest to the first coil along the second direction, the non-magnetic part including only one or more non-magnetic materials not including a magnetic material, wherein:
the first coil, the second coil and the non-magnetic part are configured such that an entirety of the first coil and an entirety of the second coil are physically separated by the non-magnetic part as the entirety of the first coil is on one side of the non-magnetic part and the entirety of the second coil is on another side of the non-magnetic part in the second direction, such that magnetic fluxes between the entirety of the first coil and the entirety of the second coil are suppressed by the non-magnetic part;
a first uppermost portion of the first coil and a second uppermost portion of the second coil are in an upper first layer of the element body and directly adjacent to a first surface of the insulating substrate in the first direction;
a first lowermost portion of the first coil and a second lowermost portion of the second coil are in a lower first layer of the element body and directly adjacent to a second surface of the insulating substrate in the first direction;
the first surface and the second surface are opposite surfaces of the insulating substrate,
the non-magnetic part includes a pair of first portions in the upper first layer and the lower first layer, the non-magnetic part includes a second portion in a second layer of the element body, and the second portion in the second layer is sandwiched between the pair of first portions in the upper first layer and the lower first layer,
the insulating substrate is at least a part of the second portion of the non-magnetic part, and
the insulating substrate is composed of a non-magnetic material different from a material constituting the pair of first portions.
2 . The coil component according to claim 1 , wherein the pair of first portions are resin parts between the first coil and the second coil in the upper first layer and the lower first layer.
3 . The coil component according to claim 1 , further comprising:
a protective film that includes only one or more non-magnetic materials not including a magnetic material, the protective film integrally covering the insulating substrate along with the first coil and the second coil,
wherein the non-magnetic part further includes a pair of additional second portions in additional second layers of the element body, which sandwich the upper first layer, the lower first layer, and the second layer, and
wherein the protective film is at least a part of the additional second portions of the non-magnetic part.
4 . The coil component according to claim 1 , wherein the pair of first portions are each a void space between the first coil and the second coil in the upper first layer and the lower first layer.
5 . The coil component according to claim 3 , wherein
the second portion and one of the pair of additional second portions sandwich the first portion in the upper first layer, and
the second portion and the other one of the pair of additional second portions sandwich the first portion in the lower first layer.
6 . The coil component according to claim 1 , wherein a shortest distance between the first coil and the second coil in the second direction is a width of the non-magnetic part between the first coil and the second coil.
7 . A coil component comprising:
an element body;
a first coil (i) in the element body and (ii) wound only around a first magnetic core having a first longitudinal axis in a first direction;
a second coil (i) in the element body, (ii) wound only around a second magnetic core having a second longitudinal axis in the first direction that is parallel to and spaced from the first longitudinal axis and (iii) adjacent to the first coil in a second direction perpendicular to the first direction;
an insulating substrate (i) in the element body, (ii) comprising a non-magnetic insulating material, (iii) that is a flat plate oriented in the second direction, and (iv) that abuts the first coil and the second coil in the first direction; and
a non-magnetic part (i) between the first coil and the second coil in the second direction and (ii) that overlaps the first magnetic core and the second magnetic core in the second direction, wherein:
the first coil, the second coil and the non-magnetic part are configured such that an entirety of the first coil and an entirety of the second coil are physically separated by the non-magnetic part as the entirety of the first coil is on one side of the non-magnetic part and the entirety of the second coil is on another side of the non-magnetic part in the second direction, such that magnetic fluxes between the entirety of the first coil and the entirety of the second coil are suppressed by the non-magnetic part;
a first uppermost portion of the first coil and a second uppermost portion of the second coil are in an upper first layer of the element body and directly adjacent to a first surface of the insulating substrate in the first direction;
a first lowermost portion of the first coil and a second lowermost portion of the second coil are in a lower first layer of the element body and directly adjacent to a second surface of the insulating substrate in the first direction;
the first surface and the second surface are opposite surfaces of the insulating substrate,
wherein the non-magnetic part includes a pair of first portions in the upper first layer and the lower first layer, the non-magnetic part includes a second portion in a second layer of the element body, and the second portion in the second layer is sandwiched between the pair of first portions in the upper first layer and the lower first layer,
the insulating substrate is at least a part of the second portion of the non-magnetic part, and
the insulating substrate is composed of a non-magnetic material different from a material constituting the pair of first portions,
the coil component further comprises a protective film that includes only one or more non-magnetic materials and does not include a magnetic material, the protective film integrally covering the insulating substrate along with the first coil and the second coil,
the non-magnetic part further includes a pair of additional second portions in additional second layers of the element body, which sandwich the upper first layer, the lower first layer, and the second layer, and the protective film is at least a part of the additional second portion of the non-magnetic part, and
wherein the pair of first portions are each a void space between the first coil and the second coil in the upper first layer and the lower first layer.