| CPC H01F 27/292 (2013.01) [H01F 17/045 (2013.01); H01F 27/2823 (2013.01); H01F 2017/048 (2013.01)] | 20 Claims |
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1. A coil component comprising:
a core including a winding core portion extending in an axial direction, and a first flange portion and a second flange portion respectively provided at a first end and a second end opposite to each other in the axial direction of the winding core portion;
a first terminal electrode provided in the first flange portion;
a second terminal electrode provided in the second flange portion; and
at least one wire wound around the winding core portion, the at least one wire including a core wire made of copper or a copper alloy and an insulating coating film made of resin covering a peripheral surface of the core wire,
wherein the core wire of the wire includes a first terminal electrically connected to the first terminal electrode and a second terminal electrically connected to the second terminal electrode,
each of the first flange portion and the second flange portion has a bottom surface facing a mounting surface side,
each of the first terminal electrode and the second terminal electrode includes a nickel-containing layer made of nickel or a nickel alloy, the nickel-containing layer being provided to cover the bottom surface of each of the first flange portion and the second flange portion, and a tin-containing layer made of tin or a tin alloy located on the nickel-containing layer,
each of the first terminal and the second terminal includes a contact surface in contact with the nickel-containing layer, a pair of side surfaces adjacent to the contact surface, the pair of side surfaces extending in a direction rising from the nickel-containing layer, and a top surface adjacent to the pair of side surfaces, the top surface facing the contact surface, and
the pair of side surfaces of at least one of the first terminal and the second terminal has a region out of contact with the tin-containing layer at least on a top surface side.
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