Patent ID: 8569886
Filing Date: 2013-10-29
Classification: H01L

Abstract:
1. A package device, comprising: a conductive pad on a surface of a die wherein the surface comprising a first region and a second region disjoint from the first region; a first passivation layer over the surface and the conductive pad, with a first opening to expose the conductive pad; a redistribution layer (RDL) on the first passivation layer and the conductive pad, in contact with the conductive pad through the first opening, and over the first region; a second passivation layer on the RDL layer and the first passivation layer, with a second opening over the first region to expose a portion of the RDL layer; and an under bump metallization (UBM) layer over the second passivation layer extending from the first region to the second region, and over the second opening over the first region t make contact with the exposed RDL layer; wherein the second region contains an area of projecting an outer periphery of a solder ball onto the surface.