Patent ID: 8677618

Claim:
A method of manufacturing a substrate using a carrier, comprising: preparing a carrier comprising a reinforcing layer of cooper clad laminate, a first releasing layer having a smaller length than that of the reinforcing layer laminated on one surface of the reinforcing layer, a second releasing layer having a smaller length than that of the reinforcing layer laminated on the other surface of the reinforcing layer, an insulating layer laminated in the first releasing layer and the second releasing layer, and a metal layer laminated in the insulating layer; patterning the metal layers to form base circuit layers; forming buildup layers on the base circuit layers; executing a routing process cutting the buildup layers, the first releasing layer, the second releasing layer, and the reinforcing layer, and the base circuit layers simultaneously in a state in which the buildup layer is laminated in the carrier to separate the insulating layers from the releasing layers; and forming solder resist layers on the buildup layers and forming openings in the solder resist layers and the insulating layers to expose pads.