METHOD OF PLATING THROUGH WAFER VIAS IN A WAFER FOR 3D PACKAGING

摘要

Therefore, a method of plating wafer via holes in a wafer is provided. A substrate (200) having a first and second side and a plurality of wafer via holes (210) is provided. Each via hole comprises a first and second end extending between the first and second side. A first seed layer (220) is deposited on the first side of the 5 wafer (200). A foil (250) is applied on the first seed layer (220) of the wafer closing the first ends of the plurality of wafer via holes (210). The second side of the wafer (200) is electro-chemically plated and the foil (250) is removed.