Patent ID: 8264089
Filing Date: 2012-09-11
Classification: H01L

Abstract:
1. A WLP comprising: a WLP die comprising a circuit side; a copper post comprising a post width and having a post length from a first post end to a second post end, the copper post being attached at the first post end to a WLP circuit connection location on the circuit side; a first metal layer comprising a flared portion having a narrow end and a wide end, the narrow end having a narrow width equal to the post width, the narrow end being set to and aligned with the second post end; a first encapsulant layer substantially covering the circuit side, the copper post and a portion of the narrow end of the first metal layer such that the wide end extends over the first encapsulant layer; a second encapsulant layer on the first encapsulant layer, the second encapsulant layer being covering the first metal layer such that the first metal layer is embedded in the second encapsulant layer, a top surface of the second encapsulant layer being substantially co-planar with a top side of the wide end; and a solder ball attached to the top side of the wide end of the first metal layer.