Patent ID: 8298865

Claim:
A method for manufacturing a substrate for a semiconductor package, comprising the steps of: providing a release film having adhesives attached to surfaces thereof, and providing first and second insulation layers each having a first surface and a second surface facing away from the first surface; attaching the first insulation layer to the second insulation layer using the adhesives formed on the surfaces of the release film, the first and second insulation layers being attached such that the second surfaces of the first and second insulation layers face each other; forming first conductive patterns on the first surface of each of the first and second insulation layers; forming a solder mask on the first surface of each of the first and second insulation layers including the respective first conductive patterns, the solder masks being formed to have openings over portions of the first conductive patterns; and separating the first and second insulation layers from each other by removing the release film, such that the separated first and second insulation layers include the first conductive patterns and the solder masks formed on the first surfaces of the first and second insulation layers and the adhesives remain attached to the second surfaces of the first and second insulation layers.