A method of forming a semiconductor package includes receiving a carrier, coating the carrier with a bonding layer, forming a first insulator layer over the bonding layer, forming a backside redistribution layer over the first insulator layer, forming a second insulator layer over the backside redistribution layer, patterning the second insulator layer to form a recess that extends through the second insulator layer and to the backside redistribution layer, filling the recess with a solder, and coupling a surface-mount device (SMD) to the solder.