Wiring board and display device
A wiring board includes a substrate including a first main surface, a second main surface, a side surface, and an inclined surface connecting the first main surface and the side surface, and side wiring on the first main surface, the inclined surface, and the side surface. The side wiring has a content of conductive particles greater than a content of an insulating component, and the wiring has a thickness equal to a thickness of at least one of the conductive particles in a first corner between the first main surface and the inclined surface and in a second corner between the inclined surface and the side surface.
1. A wiring board, comprising:
a substrate including a main surface, a side surface, and an inclined surface, the inclined surface connecting the main surface and the side surface; and
wiring on the main surface, the inclined surface, and the side surface,
wherein the wiring has a content of conductive particles greater than a content of an insulating component, and the wiring has a thickness equal to a thickness of at least one of the conductive particles in a first corner between the main surface and the inclined surface and in a second corner between the inclined surface and the side surface.
2. The wiring board according to claim 1 , wherein
the conductive particles have a major diameter and a minor diameter, and
the wiring has a thickness equal to at least the minor diameter of the conductive particles in the first corner and in the second corner.
3. The wiring board according to claim 1 , wherein
the conductive particles include a first conductive particle and a second conductive particle, and a size of the first conductive particle is larger than a size of the second conductive particle.
4. The wiring board according to claim 3 , wherein
a density of the first conductive particle is higher than a density of the second conductive particle.
5. The wiring board according to claim 3 , wherein
a resistivity of the second conductive particle is lower than a resistivity of the first conductive particle.
6. The wiring board according to claim 1 , wherein
the wiring has a thickness equal to a thickness of five or fewer conductive particles in the first corner and in the second corner.
7. The wiring board according to claim 1 , wherein
the wiring has a content not less than 80 wt % of the conductive particles.
8. The wiring board according to claim 1 , wherein
the inclined surface has a width of 10 to 200 μm inclusive.
9. The wiring board according to claim 1 , wherein
the wiring has a thickness of 0.4 to 1.6 μm in the first corner and in the second corner.
10. The wiring board according to claim 1 , wherein
the wiring has a thickness of 2 to 10 μm on the main surface and on the side surface.
11. The wiring board according to claim 1 , wherein
the inclined surface has an inclination angle of 30 to 60° inclusive with respect to the main surface.
12. The wiring board according to claim 1 , wherein
the inclined surface is a curved surface.
13. The wiring board according to claim 1 , wherein
the main surface has a first surface roughness Ra 1 , the inclined surface has a second surface roughness Ra 2 , and the side surface has a third surface roughness Ra 3 , and
at least two of the first surface roughness Ra 1 , the second surface roughness Ra 2 , or the third surface roughness Ra 3 differ from each other.
14. The wiring board according to claim 13 , wherein
the second surface roughness Ra 2 is greater than the first surface roughness Ra 1 .
15. The wiring board according to claim 13 , wherein
the third surface roughness Ra 3 is greater than the second surface roughness Ra 2 .
16. The wiring board according to claim 1 , wherein
the substrate comprises glass.
17. A display device, comprising:
the wiring board according to claim 1 ; and
a plurality of light emitters in a matrix on a first main surface, of the main surface, of the substrate.
18. The display device according to claim 17 , further comprising:
a drive on a second main surface, of the main surface, of the substrate, the drive being electrically connected to the plurality of light emitters with the wiring.