Inductor component
An inductor component comprising an element body; a helically wound coil disposed in the element body; and an external electrode disposed in the element body and electrically connected to the coil. The element body includes a plurality of insulating layers and a mark layer constituting a portion of an outer surface of the element body, and a K abundance ratio (atom %) in the mark layer is higher than a K abundance ratio (atom %) in the insulating layers.
1. An inductor component comprising:
an element body, the element body including a plurality of insulating layers and a mark layer constituting a portion of an outer surface of the element body, the plurality of insulating layers and the mark layer containing K, and a K abundance ratio (atom %) in the mark layer being higher than a K abundance ratio (atom %) in all of the plurality of insulating layers;
a helically wound coil disposed in the element body; and
an external electrode disposed in the element body and electrically connected to the coil,
wherein the plurality of insulating layers each contains an amorphous intra-insulating-layer base material, and
the mark layer includes an amorphous intra-mark-layer base material and an intra-mark-layer crystal containing at least one or more pigments.
2. The inductor component according to claim 1 , wherein
the plurality of insulating layers each further contains an intra-insulating-layer crystal,
wherein
in a reflection spectrum for light having a wavelength of from 380 nm to 780 nm, a maximum value of reflectance of the pigment of the intra-mark-layer crystal is greater than a maximum value of reflectance of the intra-insulating-layer crystal.
3. The inductor component according to claim 2 , wherein
in the reflection spectrum for light having a wavelength of from 380 nm to 780 nm, the reflectance of the pigment of the intra-mark-layer crystal has the maximum value at a wavelength different from a wavelength at which the reflectance of the intra-insulating-layer crystal has the maximum value.
4. The inductor component according to claim 2 , wherein
in the reflection spectrum for light having a wavelength of from 380 nm to 780 nm, the reflectance of the intra-insulating-layer crystal is 0.4 or less.
5. The inductor component according to claim 2 , wherein
the intra-insulating-layer crystal is quartz.
6. The inductor component according to claim 2 , wherein
the pigment is an oxide containing at least one of Ti, Co, Al, and Zr.
7. The inductor component according to claim 2 , wherein
the intra-mark-layer base material is an amorphous glass containing B, Si, O, and K as main components.
8. The inductor component according to claim 2 , wherein
the intra-insulating-layer base material is an amorphous glass containing B, Si, O, and K as main components.
9. The inductor component according to claim 1 , wherein
the mark layer has a through-hole constituting a distinguishing mark, and
at least one of the plurality of the insulating layers is exposed from the through-hole.
10. The inductor component according to claim 9 , wherein
at least one of the plurality of the insulating layers enters the through-hole.
11. The inductor component according to claim 9 , wherein
a shortest distance between an inner surface of the through-hole and the coil is 10 μm or more when viewed in a direction orthogonal to the mark layer.
12. The inductor component according to claim 3 , wherein
in the reflection spectrum for light having the wavelength of from 380 nm to 780 nm, the reflectance of the intra-insulating-layer crystal is 0.4 or less.
13. The inductor component according to claim 3 , wherein
the intra-mark-layer base material is an amorphous glass containing B, Si, O, and K as main components.
14. The inductor component according to claim 4 , wherein
the intra-mark-layer base material is an amorphous glass containing B, Si, O, and K as main components.
15. The inductor component according to claim 5 , wherein
the intra-mark-layer base material is an amorphous glass containing B, Si, O, and K as main components.
16. The inductor component according to claim 3 , wherein
the intra-insulating-layer base material is an amorphous glass containing B, Si, O, and K as main components.
17. The inductor component according to claim 4 , wherein
the intra-insulating-layer base material is an amorphous glass containing B, Si, O, and K as main components.
18. The inductor component according to claim 2 , wherein
the mark layer has a through-hole constituting a distinguishing mark, and
at least one of the plurality of the insulating layers is exposed from the through-hole.
19. The inductor component according to claim 3 , wherein
the mark layer has a through-hole constituting a distinguishing mark, and
at least one of the plurality of the insulating layers is exposed from the through-hole.
20. The inductor component according to claim 10 , wherein
a shortest distance between an inner surface of the through-hole and the coil is 10 μm or more when viewed in a direction orthogonal to the mark layer.