Patent ID: 7825513
Filing Date: 2010-11-02
Classification: H01L

Abstract:
1. An electrode structure in a semiconductor device comprising: a semiconductor chip comprising an electrode pad; a first insulation film having a first opening and provided on the electrode pad; a second insulation film having a second opening and provided on the first insulation film; a ground metallic layer provided on the first insulation film and in contact with the electrode pad via the first opening; and a bump mechanically and electrically connected to the ground metallic layer, wherein the ground metallic layer is provided in an opening of the second opening, the ground metallic layer is provided on an inner side than an outer periphery of the electrode pad, covering the first opening, an outer peripheral diameter of the ground metallic layer is smaller than an outer peripheral diameter of the electrode pad and larger than an opening diameter of the first opening, an opening diameter of the second opening is larger than the outer peripheral diameter of the ground metallic layer, and the opening diameter of the second opening is at least 1.1 times as large as the outer peripheral diameter of the ground metallic layer.