Patent ID: 7969003
Filing Date: 2011-06-28
Classification: H01L

Abstract:
1. A bump structure having a reinforcement member suitable to be disposed on a substrate comprising a pad and a passivation layer, wherein the passivation layer has an opening exposing a portion of the pad, the bump structure having the reinforcement member comprising: an under ball metal (UBM) layer, disposed on the passivation layer and covering the portion of the pad exposed by the passivation layer; a bump, disposed on the UBM layer on the pad, wherein the upper surface of the bump is a planar surface, the lower surface of the bump is smaller than that of the opening, and the lower surface of the UBM layer is larger than that of the opening; and the reinforcement member, disposed on the UBM layer, located around the bump and contacting with the bump, wherein the material of the reinforcement member is a polymer, a portion of the reinforcement member is located in the opening, and edges of the reinforcement member are aligned with edges of the UBM layer, and a top surface of the reinforcement member is lower than a top surface of the bump.