| abstract |
A pre-bumped redistribution layer (RDL) structure is disclosed. The pre-bumped RDL structure includes at least a dielectric layer, a first metal layer on the first surface, a second metal layer on the second surface, and a via layer electrically connecting the first metal layer and the second metal layer. At least a bump pad is formed in the first metal layer. A bump is disposed on the bump pad. The bump comprises a copper layer with its lower end directly jointed to a top surface of the bump pad. |