Coil component assembly for mass production of coil components and coil components made from coil component assembly
A coil component assembly includes a support member, a plurality of processed spaces penetrating through the support member, a plurality of coils disposed in the plurality of processed spaces, respectively, and a magnetic material covering the support member and the plurality of coils. The coil component assembly can be diced to form individually coil components.
1. A coil component, comprising:
a coil having a lead-out terminal;
a body embedding the coil and having a flat end surface; and
an external electrode disposed on the flat end surface of the body, and connected to the lead-out terminal,
wherein the lead-out terminal has a tapered end portion including a first flat surface flush with the flat end surface of the body,
the tapered end portion includes a second surface embedded in the body and inclined with respect to the flat end surface,
the body includes a magnetic metal powder and resin mixture, and the flat end surface of the body is provided with the resin mixture, and
a magnetic metal particle of the magnetic metal powder includes a round surface, and a flat surface intersecting the round surface and exposed from the flat end surface of the body.
2. The coil component of claim 1 , wherein the magnetic metal particle has a hemispherical shape or is a portion of a spherical shape.
3. The coil component of claim 1 , wherein the magnetic metal powder includes a plurality of magnetic metal powders whose particle sizes are different.
4. The coil component of claim 1 , wherein the first flat surface and the second surface of the tapered end portion have an acute angle therebetween.
5. The coil component of claim 1 , wherein an axial direction of the coil is a height direction and a direction perpendicular to the axial direction is a width direction, the first flat surface of the tapered end portion has a rectangular shape in which an aspect ratio of height to width is 1 or more.
6. The coil component of claim 1 , further comprising:
a line plating layer formed on the first flat surface of the tapered end portion,
wherein the lead-out terminal is connected to the external electrode through the line plating layer.
7. The coil component of claim 6 , wherein the line plating layer includes copper (Cu), and
the external electrode includes at least one of nickel (Ni) or tin (Sn) disposed on the line plating layer.
8. The coil component of claim 1 , further comprising:
an insulating layer disposed in a surface of the body.
9. The coil component of claim 8 , wherein the insulating layer includes at least one of a glass-based material containing silicon (Si), an insulating resin, and a plasma.
10. The coil component of claim 1 , wherein at least one gap is present in the body, and the gap is formed in a core region of at least the coil.
11. The coil component of claim 10 , wherein the body is provided by stacking a plurality of magnetic resin compounds including the magnetic metal powder and the resin mixture in the form of a sheet, and
the gap is present between the plurality of magnetic resin compounds.
12. The coil component of claim 1 , wherein the coil component is a power inductor.
13. The coil component of claim 6 , wherein the line plating layer includes copper (Cu), and
the external electrode includes at least one of silver (Ag) or Cu disposed on the line plating layer and at least one of Ni or Sn disposed on the at least one of silver (Ag) or Cu.
14. The coil component of claim 1 , wherein the coil is a winding type coil.
15. A coil component, comprising:
a winding type coil having at least one lead-out terminal;
a body covering the coil, and including a magnetic metal powder and resin mixture; and
an external electrode disposed on the body, and connected to the lead-out terminal,
wherein a side surface of the body is provided with the resin mixture,
a magnetic metal particle of the magnetic metal powder includes a round surface, and a flat surface intersecting the round surface and exposed from the side surface of the body, and
the side surface of the body includes a plurality of recesses having a shape corresponding to that of the magnetic metal particle.
16. The coil component of claim 15 , wherein the plurality of recesses are randomly distributed on the side surface of the body.
17. A coil component, comprising:
a coil having a lead-out terminal;
a support member made of a first material, and having a groove in which the lead-out terminal is disposed;
a body made of a second material different from the first material, and embedding the coil; and
an external electrode disposed on the body, and connected to the lead-out terminal,
wherein the support member and the lead-out terminal are exposed from a surface of the body which intersects the groove of the support member,
the second material fills at least a portion of the groove,
the external electrode is in direct contact with the support member and the second material filling at least the portion of the groove,
the second material includes a magnetic metal powder and resin mixture,
the surface of the body is provided with the resin mixture,
a magnetic metal particle of the magnetic metal powder includes a round surface, and a flat surface intersecting the round surface and exposed from the surface of the body, and
the surface of the body includes a plurality of recesses having a shape corresponding to that of the magnetic metal particle.
18. The coil component of claim 17 , further comprising:
a plurality of fixation members made of the first material and spaced apart from each other,
wherein the plurality of fixation members are exposed from the body.
19. The coil component of claim 17 , wherein the coil is a winding type coil.