Patent ID: 7215017

Claim:
A wafer level package, comprising: a semiconductor wafer, said semiconductor wafer comprising a plurality of die zones, a pad mounting surface, and at least one bonding pad disposed on said pad mounting surface; an insulative layer formed over said pad mounting surface, said insulative layer having at least one first conductor formation hole defined therein, said at least one bonding pad and a portion of said pad mounting surface connected and adjacent to said at least one bonding pad being exposed through said at least one first conductor formation hole; at least one conductor formed from an electric conducting paste filling said at least one first conductor formation hole and covering said at least one bonding pad and said portion of said pad mounting surface of said wafer; at least one conducting layer positioned on said at least one conductor in contact therewith, an interface formed between a surface of said at least one conducting layer and said at least one conductor extending substantially over the entire said surface of said at least one conducting layer; a first cover layer covering said insulative layer, said first cover layer having defined therein at least one second conductor formation hole for exposing a portion of said at least one conducting layer; a second cover layer covering said first cover layer, said second cover layer having defined therein at least one third conductor formation hole axially aligned with said at least one second conductor formation hole defined in said first cover layer, said at least one third conductor formation hole having a diameter thereof greater than that of said at least one second conductor formation hole; electric conducting pastes filling said at least one third conductor formation hole and said at least one second conductor formation hole, thus forming an electric connection to said at least one conducting layer; and at least one conductive bump disposed on said electric conducting pastes in said at least one third conductor formation hole.