US Patent 11309252 Package substrate and package structure

A package substrate including a first redistribution structure, a first bonding layer, a core, a second bonding layer and a second redistribution structure in a sequential order is provided. The first redistribution structure has a first redistribution surface and a first bonding pad disposed on the first redistribution surface. The second redistribution structure has a second redistribution surface and a second bonding pad disposed on the second redistribution surface. The core has a first core pad disposed on a first core surface, and a second core pad disposed on a second core surface opposite to the first core surface. The first core pad and the second core pad are directly bonded to first bonding pad and the second bonding pad, respectively. The first core pad and the second core pad are offset from first bonding pad and the second bonding pad, respectively. The first bonding pad and the first core pad are embedded in the first bonding layer. The second bonding pad and the second core pad are embedded in the second bonding layer. A package structure is also provided.