Printed circuit board, package substrate comprising same, and method for manufacturing same
Abstract:
The printed circuit board, according to one embodiment, comprises: an insulation substrate; a pad formed on at least one side of the insulation substrate; a protection layer which is formed on the insulation substrate and exposes an upper surface of the pad; and a bump formed on the pad exposed by the protection layer, wherein the bump comprises a plurality of solder layers having melting points different from each other.
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