Edge coating for glass core substrate with a frame

An apparatus, comprising:

• a package substrate with a glass core between buildup layers, wherein a width of the glass core is greater than a width of the buildup layers;
• a buffer layer that surrounds a perimeter of the package substrate, wherein an inner surface of the buffer layer conforms to a profile of the package substrate, and wherein an outer surface of the buffer layer is substantially vertical;
• and
• a frame in direct contact with the outer surface of the buffer layer.

An apparatus, comprising:

• a package substrate with a core that comprises a glass layer, wherein an edge profile of the package substrate is non-linear, and wherein a portion of the core protrudes from edges of organic buildup layers that are over and under the core;
• a layer around a perimeter of the package substrate, wherein the layer contacts a top surface of the core, a bottom surface of the core, and an edge surface of the core;
• and
• a frame around the layer.