Semiconductor package structures are provided. A semiconductor package structure includes a chip, a molding material surrounding the chip, a through-via extending from a first surface to a second surface of the molding material, and a first re-distribution layer (RDL) wire disposed on the second surface of the molding material and electrically separated from the through-via. The second surface is opposite to the first surface. A portion of the first RDL wire across the through-via has a first segment with a first width and a second segment with a second width different from the first width.