Method of manufacturing printed circuit board
A method of manufacturing a printed circuit board (PCB) and the PCB are provided. The method includes: filling a resin in a via-hole formed at a substrate from one surface side of the substrate; emitting light for a predetermined period of time to the resin filled in the via-hole from the other surface side of the substrate; and applying another resin on the other surface of the substrate.
1. A method of manufacturing a printed circuit board (PCB), the method comprising:
filling first resin in a via-hole formed at a substrate from a first surface side of the substrate;
curing the substrate to provide a first recessed portion on the first resin filled in the via-hole;
emitting light during a predetermined period of time to the first resin filled in the via-hole from a second surface side opposite from the first surface side of the substrate; and
applying a first layer of second resin on the second surface side of the substrate and the first recessed portion,
wherein the applying the first layer of the second resin on the second surface side of the substrate comprises applying the first layer of the second resin two times, the applying the first of the second resin two times comprising:
applying the first layer of the second resin on the second surface side of the substrate a first time;
curing the substrate a first time;
applying the first layer of the second resin on the second surface side of the substrate a second time; and
curing the substrate a second time.
2. The method of claim 1 , wherein when the light is applied to the first resin from the second surface side of the substrate, the light is blocked from being emitted to an area where the via-hole is not formed and the light is emitted to the via-hole.
3. The method of claim 2 , wherein a mask, which is patterned such that the light is blocked from being emitted to the area where the via-hole is not formed and the light is applied to the via-hole, is disposed over the second surface side of the substrate and the light is emitted to the mask.
4. The method of claim 1 , further comprising, after applying the first layer of the second resin on the second surface side of the substrate, patterning at least one surface of the substrate.
5. The method of claim 4 , further comprising, after the patterning of the at least one surface of the substrate, curing the substrate.
6. The method of claim 1 , wherein the filling the first resin in the via-hole comprises:
filling the first resin in the via-hole such that the first resin filled in the via-hole and the substrate form a coplanar surface; and
providing a second layer of the first resin on the first surface side of the substrate.
7. The method of claim 6 , wherein the curing the substrate causes the second layer of the first resin to have a second recessed portion.
8. The method of claim 1 , wherein the applying the first layer of the second resin comprises applying the first layer of the second resin after the curing the substrate.