Printed circuit board and method of manufacturing the same

A printed circuit board comprising:

• a glass layer having a first side surface and a second side surface, opposing each other in a first direction, a third side surface and a fourth side surface, opposing each other in a second direction, perpendicular to the first direction, a first corner portion connecting the first side surface and the third side surface to each other, a second corner portion connecting the first side surface and the fourth side surface to each other, a third corner portion connecting the second side surface and the third side surface to each other, and a fourth corner portion connecting the second side surface and the fourth side surface to each other;
• and an insulating material disposed on the glass layer and covering the first to fourth side surfaces and the first to fourth corner portions, wherein at least one of the first to fourth corner portions has a plurality of edges, the first corner portion includes a first corner portion surface in contact with the first side surface and the third side surface, and the plurality of edges include an edge where the first corner portion surface is in contact with the first side surface and another edge where the first corner portion surface is in contact with the third side surface.